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Use RadarNow! when you need to see the weather picture without delay.

You'll be seeing National Weather Service Enhanced Radar "Base" (N0R) Images from the NOAA WSR-88D NEXRAD Radar Sites located around the US. The radar site displayed is the one closest to your location.

Free 5 Day Trial

The 5 day trial gives you access to all the premium features at no cost or obligation. This is a one time deal with each device, and you get to select when you start the trial period.

  • You will never be charged without your permission for using our app.
  • The only way to pay for any of our services is through the Google Checkout procedure. Unless you've gone through that, there will not be a charge for our app.
  • The basic app is free, using the trial period is free.
  • Once the trial period is over, the premium features are not available and you will not be charged in any way.
  • If you want to use the premium features, you can always elect to pay for them at a later time.
  • There is no way for you to pay without your prior authorization through Google Checkout. If you inadvertently do authorize a payment through Google Checkout, you have three hours to cancel it without penalty.
  • Purchase one year of access for $2.99 or $4.99 for two years. You will not automatically be billed and must manually renew when your access expires.

Free mode features

  • Automatically detect your location and display it on a map.
  • Display looping NOAA WSR-88D NEXRAD radar images.
  • Zoom and pan the map.
  • Display county/state boundaries
  • Customizable NWS Alerts
  • Tap on the screen to hide or reveal the map controls.
  • No user input required to display the radar loop - just start and go!
  • Use in portrait or landscape mode.
  • Five zoom levels.
  • Up to ten radar images in the loop (about an hour to an hour and a half of radar).
  • Control the speed of the loop, pause or go backwards.
  • Opacity sliders for the maps and radar imagery.
  • Show WSR-88D stations on the map.
  • Current conditions available at the touch of a button.
  • Hourly forecasts for the next two days
  • If your location can't be determined, enter a Zip Code.
  • Option to skip wait for current location at startup.

Premium features

Check the status of your premium subscription anytime by looking at the "About" tab (menu-settings-about).

  • Automatically updates radar loop whenever a new image is available
  • Driver mode.

    When you activate Radar Now! Driver, your phone or tablet becomes a continuously updating, tracking radar display similar to what aircraft have on their instrument panel. Radar Now! Driver stays awake, moving the map with you as you travel around the country.

    Your location icon, normally blue will turn red when "Driver mode" is active.

  • Range Rings

    Displays range rings around your location so you can get an idea of how far away storms are and how fast they are moving.

    Configuration options

    • Find range rings configuration in the options (menu-settings-options) screen.
    • Show range rings - Switches range rings on and off
    • Range rings size - Choose between rings at 25, 50 and 75 miles (constant values) and 25, 50 and 100 miles (Twice the distance).
    • Range rings color - Select the color for the rings (default is black).
  • Multiple Radar Products

    Note: These products are only available when in "local" mode.

    • Short Range Radar

      "N0R" Base Short Range Reflectivity is the "default" (free) radar display.

      Base reflectivity only shows reflected energy at a single elevation scan of the radar. The base reflectivity image is from the lowest "tilt" angle (0.5 deg.). This means the radar's antenna is tilted 0.5 degrees above the horizon.

    • Long Range Radar

      "N0Z" Base Long Range Reflectivity displays a larger area than the default short range radar for a better view of the "big picture" in the area. Long range radar has twice the range of short range radar but one-fourth the resolution.

    • Composite Radar

      "NCR" Composite Short Range Reflectivity radar.

      Composite reflectivity displays the highest reflectivity of ALL elevations scans. When compared with Base Reflectivity, the Composite Reflectivity can reveal important storm structure features and intensity trends of storms.

      Velocity - Storm

      "N0S" Velocity: Storm Relative.

      This display is of radial velocity of the wind relative to the storm's motion. The result is a picture of the wind as if the storms were stationary. This often unmasks storms that rotate (supercells) which can be a precursor to the formation of tornadoes. Green colors indicate wind moving toward the radar with red colors indicating wind moving away from the radar.

    • Velocity - Base

      "N0V" Velocity: Base.

      This display of radial velocity represents the overall wind field. Green colors indicate wind moving toward the radar with red colors indicating wind moving away from the radar.

  • Zoom and pan in "Full" mode around the entire continental US

    Display the continental US as a zoomable, pannable map overlaid with a looping radar. Radar stations are shown as icons which can be selected to drill down into that station's local area.

    To return to "local" mode, select one of the green radar station icons or use the radar station search icon .

  • Select any NOAA WSR-88D NEXRAD radar station by icon

    Selecting one of these icons allows viewing of another station's radar loop. The "local conditions" icon (small cloud, top center-right) will show conditions at the radar site itself.

  • Select an area to display by various methods:
    • Select a station by Zip Code
    • Favorites
    • Distance to your current location
    • Radar station city name
    • Radar station state and city
    • Radar station letter code
  • Temperatures

    With this feature active, the map shows temperatures at various stations. Selecting one of these stations will bring up the current conditions of that location. Temperatures are updated about once an hour. This feature can be switched off by unchecking the "Show temperatures" option (menu-settings-options).

  • Favorites

    Save and use locations of interest.

  • Current conditions shows for the location you're displaying, not just where you are
  • We have a method to transfer your premium status (See "Transfer Premium" topic in this document) to another Google account (GMail) in the event you change your Google account. All your devices using the same Google account will be premium once you subscribe.

    Premium status tracking is performed using your Google account (Gmail address). When you become premium, an encrypted (MD5 hash) version of your Google account is sent to our servers and linked with your payment. Any other Android device, including new ones, that use the same Google account will also go into premium mode. This feature started in release 4.0. Using an MD5 hash of your Google account means that an encrypted version of your information is sent to our servers. Essentially, for your security, your Google account is impossibly scrambled in RadarNow! before sending it to our system. We require a unique way of identifying you to track your premium status across devices. We don't have to know anything beyond this unique code that results from the encryption process. We value your privacy.

Get premium

A subscription to RadarNow! premium features is $2.99 for one year or $4.99 for two years.

To gain access to RadarNow!'s premium features, just select one of the premium icons or press Menu-Upgrade. You'll be asked if you'd like to upgrade. Select "Yes" to this question and select one of these methods to gain access.

  • Start the 5 day free trial period

    Everyone will be granted a free five day trial of the premium features. This is a one time deal with each device, and you get to select when you start the trial period.

  • Upgrade from Play.

    Passes will be available through the Google in-app purchase system. See the "Upgrade from Play Store" option for details.

    Purchase one year of access for $2.99 or $4.99 for two years. You will not automatically be billed and must manually renew when your access expires.

  • Important note: Since we offer a 5 day free trial, there will be no refunds under any circumstances.

If you've started your free trial or subscribed and RadarNow! is in free mode, you may have had a problem RadarNow! communicating with our servers. RadarNow! will try again automatically or you can do a "Force registration" option (menu-settings-options). A dialog will tell you if this was successful or not. You can check your premium status by looking at the "About" tab (menu-settings-about)

Premium status tracking is performed using your Google account (Gmail address). When you become premium, an encrypted (MD5 hash) version of your Google account is sent to our servers and linked with your payment. Any other Android device, including new ones, that use the same Google account will also go into premium mode. This feature started in release 4.0. Using an MD5 hash of your Google account means that an encrypted version of your information is sent to our servers. Essentially, for your security, your Google account is impossibly scrambled in RadarNow! before sending it to our system. We require a unique way of identifying you to track your premium status across devices. We don't have to know anything beyond this unique code that results from the encryption process. We value your privacy.

We have a method to transfer your premium status (See "Transfer Premium" topic in this document) to another Google account (GMail) in the event you change your Google account. All your devices using the same Google account will be premium once you subscribe.

To have all your devices under your Google account be in premium mode do the following:

  1. Be sure all your devices are on RadarNow! version 4+.
  2. Make sure one of them shows premium.
  3. Do a "Force registration" (menu-settings-options) option on your premium device.
  4. Do a "Force registration" option on all non-premium devices.
  5. New installs of RadarNow! (not upgrades) should automatically show premium within a few minutes of the first time RadarNow! is opened.


Use the "back" key to end RadarNow!.

RadarNow! starts by fixing your location with Google's Location API which uses Network services and/or GPS. You can choose to always use your last location by unchecking the option (menu-settings-options) "Find me on startup." Be aware that using this option may cause NWS Alerts to be delivered for the wrong area.

The radar display starts with the NOAA WSR-88D NEXRAD Radar Site (station) located closest to your location overlaid on a map. You'll start to see the radar images being displayed as they are downloaded. Up to ten of the latest radar images will be displayed in a loop.

The map can be zoomed using pinch gestures or by using the Zoom buttons (+ and -) on the right hand side of the display.

Tapping the map in a spot where there are no controls will hide all the controls for a better view of the radar imagery. A message will display at the bottom of the screen when this is done. This message can be dismissed by selecting the "X." Tapping the screen again will return the controls.

As the map is panned, the radar display will switch from station to station depending on which is closest to the center of the screen. You may also lock a radar station by touching its green radar station icon. Once the display is locked to a station, it will remain selected until the coverage area is off the screen. Moving the coverage area off screen unlocks the station and returns the radar display to normal operation. Only one station can be active at time.

In premium mode, the radar display type can be switched from showing individual radar stations to showing a composite of all the radar station data. Use the icon in the top left corner of the screen to switch to a composite display (Full view). Select a radar station icon to switch back to displaying individual stations.

To determine if a radar return is possibly ground clutter (see the topic "Ground clutter" for more info), try selecting a neighboring station with overlapping coverage. If the returns show precipitation for more than one station, it most likely is real. If it doesn't show on the neighboring station, then it's most likely ground clutter or very light low level precipitation.

You can optionally display county and state boundaries as an overlay on top of the radar imagery. Go to the "Layers & Opacity" tab (menu-settings-layers) and check the "County" checkbox to activate this feature.

A black radar station icon indicates the station is offline and unusable.

If you pan the map so that your location is no longer visible, using the menu option "Find me" will recenter the map on your location. This option will also turn on location services and find your current location.

Both portrait and landscape mode are supported.


Use a finger to pan, the plus icon to zoom in, the minus icon to zoom out. The zoom icons only show when they are available. If the minus icon isn't present, there is no further zoom out level. When the plus icon disappears, the maximum zoom has been reached.

You'll notice the progress bar across the top of the screen moves from left to right as the radar image loops. Pressing the play/pause icon will stop or restart the loop. You may also press on the progress bar itself to control the radar. Moving the progress indicator left and right will cause the radar image to go forward or backward in time.

Tapping the map will remove all the controls. Tapping the map again will bring them back. A message stating "Where did the map controls go" will be displayed the first time you try this feature. Pressing the "x" in that message will prevent that message from displaying again.

The radar loop will also pause when you pan or just touch the screen.

Menu button:

  • Find me: Starts location services and attempts to show the radar station closest to your location.
  • Driver on/off: Turns Driver mode on and off. When Driver mode is on, your location icon will be red .
  • Refresh: Causes RadarNow! to re-read the radar image index and display the newest radar sweeps.
  • Help: Displays this help text.
  • Upgrade: Displays the options to upgrade RadarNow! to premium mode.
  • Settings: Shows more options.

Menu button-Settings:

  • Opacity & Layers: Allows altering how the map and radar layers are displayed and controls the county layer.
  • Options: More settings options.
  • Contact us: Please use this form to contact us.
  • What's new?: A summary of the changes since the last version.
  • Subscribe: Use this option for premium upgrade.
  • About: Displays version and your subscription status.

Top Level Icons:

There are four icons across the top of the screen:

  • Enter into full screen mode (Premium).
  • Active NWS Alerts (Free).
  • Opens current conditions (Free).
  • Radar Station List (Premium).

The Alert icon will only show if there are active alerts for your county.

Location System

Radar Now! uses Google's Fused Location Provider which intelligently manages the underlying location technology and gives you the best location possible.

A progress bar will show how long RadarNow! will wait to find a location. When it runs out, RadarNow! will just take the last known location. This may not be the right one and may be far from your current location.

There is an option (menu-settings-options) to stop RadarNow! from waiting for your location called "Find me on startup." Unchecking this option will cause RadarNow! to go directly to the map without waiting for the location system.

If you are having difficulties with our app finding your location, check the following:

  • Make sure both services are active. From the Home screen, press the menu button, then select "Location & security." Both "Use GPS satellites" and "Use wireless networks" should be checked. Allowing Google to share your location information permits the "wireless network" location service to get better over time.
  • If you are indoors and our app isn't able to locate you, try going outside and let the device get a GPS lock. This should take about 30 seconds. Once you do this, that may allow the wireless network feature work for you in the future. Often, especially in rural areas, this information isn't available to Google's wireless network service so allowing a GPS lock will send that info back to Google.
  • If our app still isn't able to locate you correctly, please switch off wireless networks and go outside and let the device get a GPS lock. This should take about 30 seconds. If the location is good at this point, turn wireless networks back on and try our app again.
  • If you're still having trouble, try opening the Google Maps application and see if your location is correct on that app. If your location doesn't show correctly using Google Maps, then there may be a problem with your device. Try switching the power off and on again, then try Google Maps once more. Often that fixes problems with location services.

If you're still having difficulty with finding your location or your location is inaccurate, you can try increasing the timeout for the location fix. To do this, select menu-settings-options: Location timeout. The default is 15 seconds and you can increase it to 30 seconds. In addition, you can reduce the location timeout to 5 seconds once the wireless location network has worked out your location accurately.

Driver Mode

Radar Now! Driver keeps you current on weather as you drive. Whether across town or across the country, Radar Now! Driver shows you the storms coming your way.

When you activate Radar Now! Driver, your phone or tablet becomes a continuously updating, tracking radar display similar to what aircraft have on their instrument panel. Radar Now! Driver stays awake, moving the map with you as you travel around the country.

Your location icon, normally blue will turn red when "Driver mode" is active.

  • Local mode (showing a single radar station)

    Radar Now! Driver will automatically switch to and use the closest radar station to your location.

  • Full mode (showing a composite radar picture)

    Radar Now! Driver keeps your position centered, moving the map with you, no matter where you go in the continental US.

  • Activate Driver

    Select menu-Driver on. Once activated, your location icon changes color from blue to red. Deactivate Driver by selecting menu-Driver off.

  • Caution!

    This feature will use a considerable amount of battery due to the screen staying awake and the use of GPS. A car dock is recommended or use your car charger cable.

Radar Now! Driver configuration options

  • Driver poll interval

    Used to determine how often your location will be updated. Options are from 1 second to 30 minutes. The more often your location is updated, the more battery will be used. If you have a car dock or power cable, then use a more frequent poll time. If you're running on battery alone, use a less frequent poll time.

  • Force center map

    If checked, RadarNow! will attempt to place your location close to the center of the map. If not checked then it RadarNow! will attempt to leave your location in the same place on the screen while moving the map.

  • Use network

    If checked, "wireless networks" services will be used to calculate your location. Use this option if you're in mountainous or urban locations where GPS is difficult to acquire. It's less accurate than GPS but also uses less battery power.

  • Use GPS

    If checked, "GPS Satellite" services will be used to calculate your location. Use this option if you can get a GPS lock easily and have sufficient battery power or are connected to external power. GPS is the most accurate method of computing location but consumes a lot of power.

NWS Alerts

NWS's Watches, Warnings or Advisories

National Weather Service Alerts are received by RadarNow! using the Google Cloud Messaging (GCM) system. Our servers receive alerts from the National Weather Service (NWS) through a feed to our server system. Applicable messages for your current location (by county) are sent to RadarNow! through GCM within a very short time from issuance. In order to receive alerts, RadarNow! must have been used in the last month. Users who haven't started RadarNow! in the last 30 days will not receive alerts. If there is polygon associated with the alert, it will show up on the map as an outline with the same color code as the alert. Dismissing the alert removes the polygon from the map as well.

The default is for all alerts to generate a silent notification. You can change this to fit your individual requirements by using the option (menu-settings-options-NWS Alerts) "Action by event type" to customize how alerts are handled.

The "Default action" option sets the notification method for any event that hasn't had a specific action type set.

The alerts sent to your device are dependent on the county in which your device is currently located. If you used an override location, either through favorites or by entering a Zip Code, that will be the location used to determine what county to use for alerts.

When your location changes by about 10 miles, your county will be recomputed and if you've moved into a different county, any alerts that are currently active for that county will be sent to your device. Alerts for the county you just left will be removed from the list as well.

Please note: RadarNow! needs to know what county you are located in order to send NWS alerts. If you travel outside the county RadarNow! was last used in, start RadarNow! and do a "Force registration" option (menu-settings-options, near the bottom). This will inform RadarNow!'s alert system of your new location.

Notification types:

  • Default - Use the default action.
  • Ignore - No action taken, alert ignored.
  • List only - Show only on the alert list. No notification sent.
  • Notify - Send a notification to the notification bar.
  • Notify + sound - Send a notification to the notification bar with the notification sound. Premium uses will be able to select one of three additional sounds besides the system notification sound.

    The choices are:

    • System default - use your default notification sound.
    • Moderate - Use RadarNow!'s sound for moderate alerts.
    • Severe - Use RadarNow!'s sound for severe alerts.
    • Extreme - Use RadarNow!'s sound for extreme alerts.

The default action can be configured using the option (menu-settings-options) with that name.


Alerts are delivered to your device within a few minutes after they are received by our servers, however, it may take up to 15 minutes for an alert to be received.

If there are active alerts for your area, and you've selected to receive that event type (see "Action by event type" in options menu), an icon will appear on the top status bar. The color of the icon depicts the most extreme active alert. Colors correspond to the color indicator on the alert list.

Selecting the Alert icon will open a list of active alerts.

Selecting an alert from the Alert List will display the options for this alert:

  • Open Details - opens the detail list for that alert.
  • Dismiss - Marks this alert as being read. When all alerts have been dismissed, the Alert icon will turn white. Dismissed alerts are still active, however, updated alerts that have already been dismissed will not cause a subsequent notification. Alerts that have an associated polygon will have their polygon (area) hidden once the alert is dismissed.
  • Activate Alert - This option only shows on alerts that have been dismissed. Selecting this option will reactivate a dismissed alert. Alerts with associated polygons will have their polygon visible when it is reactivated.
  • Find alert - If there's a polygon (area) associated with an alert, using this option will zoom the map to show that area. Alert area boundaries are highlighted with the color of the alert. To remove the polygon from the map, dismiss the alert.

To stop all alerts, go to the "NWS Alert" section of the options menu (menu-settings-options) and set the "Default action" to "Ignore." This will affect any alert event that hasn't had an override action enabled (see "Actions by event type").

Alert Polygons

Some NWS Alerts have an associated polygon (area) that will show up on the map as a boundary in the color of the alert.

Alert areas can be removed by from the map by dismissing the alert in the alert list.

To locate a NWS Alert polygon on the map:

  • Select the alert icon at the top of the screen.
  • Select an alert. A menu of options will appear.
  • Select "Find on map" from the list.
  • The map will be zoomed and centered to display the alert.

Troubleshooting NWS Alerts

Please check the following if not receiving alerts

  • Is there an icon at the top of the screen that looks like an A? If so, then this is the alert indicator. Please select that icon to display alerts. Check the NWS Alert options (menu-settings-options) to see if you've turned off notifications.
  • Have you blocked all alerts? Check the NWS Alert options to ensure you haven't opted out.
  • Have you blocked some alerts? Check the NWS Alert option "Actions by event" to ensure you haven't stopped a particular type of alert.
  • Did you uncheck the "Find me on startup" option (menu-settings-options)? Doing so might cause RadarNow! to use a location that's outside your NWS Alert area (alerts are issued by county). Use the "Find me" menu option to set your correct location. Once RadarNow!'s servers have your correct county, you should start receiving the proper NWS Alerts.
  • Is your location set correctly? Please check the help text topic "Location" for steps you can do to improve your location fix.
  • Try doing a "Force registration" option (menu-settings-options, near the bottom) to reset your alert status. If there are alerts active for your area, you should receive them shortly after performing this option.
  • If none of these helps solve the issue, please use the "Contact us" form inside of RadarNow! (menu-settings-contact us) and report the issue. We will send out a test alert in response.


Save and use locations of interest.

To use Favorites:

  • To add a location to the "Favorites" list, use a "long press" anywhere on the map. You'll be able to add the location to the favorites list or set it as your current location without adding it to the favorites list. Long press on a radar station to add it to your favorites too. It will automatically have the radar station's name.
  • When a location is added to the "favorites" list, the name can be changed. Favorite will appear as a star on the map.
  • There are two ways a favorite can be used. Selecting the star on the map or using the "favorites" list from the selection icon in the top right corner and choosing "favorites.
  • To view a favorite as your current location, select the favorite by pressing the star icon on the map and select "Set as current." A favorite can be used to override current location when RadarNow! starts by selecting "Open on startup."
  • A Favorite set to "Current location" can be reset to using the location system by selecting the "Find Me" menu item.
  • To change the name of a favorite, select it, then choose "Edit" from the favorites options. Doing this will open a text dialog. Select "OK" to save the change back to the list.
  • To remove a favorite, select it, then choose the "Delete" option to remove it. There is no undo for this event so be sure you really want to remove it prior to performing the delete option.

To use a "long press," touch the screen on one spot for at least one second. A dialog box with the favorites options will appear once the long press is detected.

Satellite Views

Real time (every 30 minutes) Satellite imagery from NOAA

Color images from NOAA's GOES Satellites:

US Mercator composites:
Shortwave Infrared
Infrared Rainbow
Water Vapor

Transfer Premium

RadarNow! has the ability to transfer your premium status between Google accounts (GMail). A single purchase actives premium on all your devices that use your Google account.

To transfer your premium status, do the following:

  1. Select the "Transfer Premium status" option (menu-settings-options).
  2. Enter your Google order number.
  3. Press OK.

It should take a few seconds before the server responds to your request.

For your security, this task can only be accomplished on your device.

You can find your Google Order number in the Google Wallet console:

Example of Google Order Numbers:

1234567890123456 (16 digit number)
The Google Order number is the 16 digit number AFTER the . (dot)

1234567890 (10 digit number)
The Google Order number is the 10 digit number AFTER the second . (dot). Leave off the dots (.).

123456789012345 (15 digit number)
The Google Order Id is the 15 digit number AFTER the G. (in red here)

Google has several different order number formats. We should be able to use any one of the styles listed above. If your order number doesn't work, please use the "Contact us" form inside RadarNow! and let us know.

Possible error conditions:

  • Invalid order number:

    Double check your entry and make sure you entered the correct order number. Google Checkout order Id's are 15 digits in length and may be found in your confirmation e-mail from Google when you purchased premium access originally.

  • The Order is Expired:

    This error indicates that the premium status for the order has expired. You'll need to purchase access to the premium features again if you get this message.

  • The Order is Applied Correctly

    This message indicates either the transfer was unnecessary, or you have already transferred this order to your new device. Check to see if you have premium access. You should be all set.

If you see the message "We have successfully transferred your premium status" then you are all set and should have access to our premium features at this point.

Override location

You can move the map to another radar station in free mode by using this option.

  1. Select Menu-Settings-Options-Override Location.
  2. Enter in the latitude and longitude separated by a semi-colon. Ex: 35;-90
  3. Select Ok. Return to the radar display.
  4. Select Menu-Find me.
  5. Wait about 30 seconds for RadarNow! to switch locations.

To return to automatic location selection:

  1. Select Menu-Settings-Options-Override Location.
  2. Clear out the coordinates.
  3. Select Ok. Return to the radar display.
  4. Select Menu-Find me.
  5. Wait about 30 seconds for RadarNow! to switch locations.

You can also use your Zip Code if location services aren't available or your location can't be found.

Radar Colors

The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan. "Reflectivity" is the amount of transmitted power returned to the radar receiver. Reflectivity (designated by the letter Z) covers a wide range of signals (from very weak to very strong). So, a more convenient number for calculations and comparison, a decibel (or logarithmic) scale (dBZ), is used.

The dBZ values increase as the strength of the signal returned to the radar increases.

The scale of dBZ values is also related to the intensity of rainfall. Typically, light rain is occurring when the dBZ value reaches 20. The higher the dBZ, the stronger the rainrate. Depending on the type of weather occurring and the area of the U.S., forecasters use a set of rainrates which are associated to the dBZ values.

These values are estimates of the rainfall per hour, updated each volume scan, with rainfall accumulated over time. Hail is a good reflector of energy and will return very high dBZ values. Since hail can cause the rainfall estimates to be higher than what is actually occurring, steps are taken to prevent these high dBZ values from being converted to rainfall.

 dBZ   Rainrate 
65 16+
60 8.00
55 4.00
52 2.50
47 1.25
41 0.50
36 0.25
30 0.10
20 Trace
10 Light
<10 Mist

What do the colors mean in the velocity images?

The colors are the different radial velocities measured by the radar. In velocity images, red colors indicated wind moving away from the radar with green colors indicating motion toward the radar. The transition zone between incoming and outgoing winds are indicated the gray-ish colors between the two.

Each velocity image includes one of two velocity scales regardless of the radar's operation mode. One scale (far left) represents radial velocities in the base velocity image. The other scale (near left) represents the "storm relative motion" radial velocities. Note: As in the case of reflectivity images, the color on each scale remains the same in both velocity images, only the values change. The velocity of the wind is measured in knots (1 knot = 1.15 mph).

Since these colors represent values relative to the radar, to interpret these images correctly, it is most important to know where the radar is located each velocity image. For example, a region with outbound wind in one radar will be represented by red colors. That same region's wind could be inbound on an adjacent radar image and represented by green colors.


Ground Clutter

Echoes from surface targets appear in almost all radar reflectivity images. In the immediate area of the radar, "ground clutter" generally appears within a radius of 20 miles or so. This appears as a roughly circular region, bluish in color that doesn't move. It results from radio energy reflected back to the radar antenna from outside the central radar beam, from the earth's surface or buildings.

If there are other radar stations in your area, you can easily check to see if the echos in the radar image are ground clutter or actual storms by selecting a nearby radar station and seeing how your area looks from another angle. If the echos vanish, then most likely the returns were just clutter. If you still see some evidence of precipitation, then those echos were real. This is huge advantage over other radar programs.

 Clutter colors 

Current Conditions

When you see "current conditions" from a location further than you'd expect, that means the closest weather station to you is offline. Weather stations go up and down all the time, sometimes for maintenance, other times for equipment failure. We test the weather stations once a day (there are over 2500 of them) and take them out of the system if they are offline. An average of 10% of the weather stations are down at any one time.

If one or more readings are missing from the "current conditions" box, it's probably due to an instrument going down at that weather station. This could be from equipment failure or routine maintenance.

NOAA repairs the stations (or their contractors) fairly quickly. Usually a station that was down one day will be back in operation the next.

Hourly Forecasts

Two days (48) hours of hourly forecasts showing:

  • Temperature
  • Precipitation chance
  • Wind speed
  • Wind direction

To view forecast, select current conditions, then use the Forecast button.

Premium users can select any temperature oval to see current conditions with a forecast.

Install Problems

The launcher and Google Play Store installer are part of Android, your device manufacturer or carrier's specific Android OS version. As such, Android devices are subject to a wide variety of unusual behavior during installation and launching (starting up) apps.

We have no control or access to this part of Android. Any difficulties with this area of your device are issues that should be directed to your carrier or the Google Play Store support team.

Usually, there is a common fix to most of these problems.

  • Turn off your device.
  • Take out the battery.
  • Put the battery back in.
  • Restart your device.

These steps usually solve most problems with the Laucher or installation. If not, try this too:

  • Uninstall
  • Reinstall

If you still have problems with installation or launcher problems, please contact your carrier or the Google Play Store support team.


End User License Agreement

By downloading any application from USNaviguide LLC or Google (here after referred to as "The Company"), installing or using this application or any portion thereof ("Application"), you agree to the following terms and conditions (the "Terms and Conditions").

    1. The Company grants you the non-exclusive, non-transferable, limited right and license to install and use this Application solely and exclusively for your personal use.
    2. You may not use the Application in any manner that could damage, disable, overburden, or impair the Application (or servers or networks connected to the Application), nor may you use the Application in any manner that could interfere with any other party's use and enjoyment of the Application (or servers or networks connected to the Application).
    3. You agree that you are solely responsible for (and that The Company has no responsibility to you or to any third party for) your use of the Application, any breach of your obligations under the Terms and Conditions, and for the consequences (including any loss or damage which The Company may suffer) of any such breach.
    4. The Software has been developed for entertainment purposes only and is not designed or licensed for any other purpose.

    You acknowledge that: (a) the Application contains proprietary and confidential information that is protected by applicable intellectual property and other laws, and (b) The Company and/or third parties own all right, title and interest in and to the Application and content, excluding content provided by you, that may be presented or accessed through the Application, including without limitation all Intellectual Property Rights therein and thereto. "Intellectual Property Rights" means any and all rights existing from time to time under patent law, copyright law, trade secret law, trademark law, unfair competition law, and any and all other proprietary rights, and any and all applications, renewals, extensions and restorations thereof, now or hereafter in force and effect worldwide. You agree that you will not, and will not allow any third party to, (i) copy, sell, license, distribute, transfer, modify, adapt, translate, prepare derivative works from, decompile, reverse engineer, disassemble or otherwise attempt to derive source code from the Application or content that may be presented or accessed through the Application for any purpose, unless otherwise permitted, (ii) take any action to circumvent or defeat the security or content usage rules provided, deployed or enforced by any functionality (including without limitation digital rights management functionality) contained in the Application, (iii) use the Application to access, copy, transfer, transcode or retransmit content in violation of any law or third party rights, or (iv) remove, obscure, or alter The Company's or any third party's copyright notices, trademarks, or other proprietary rights notices affixed to or contained within or accessed in conjunction with or through the Application.

    1. The Company's Privacy Policy (located at explains how The Company treats your information and protects your privacy when you use the Application. You agree to the use of your data in accordance with The Company's privacy policies.
    2. The Application may contain features that are used in conjunction with The Company's search and other services. Accordingly, your use of such features of the Application is also governed by The Company's Terms of Service located at, The Company's Privacy Policy located at, as well as any applicable The Company Service-specific Terms of Service and Privacy Policy, which may be updated from time to time and without notice.

    This Application, related materials and documentation have been developed entirely with private funds. If the user of the Application is an agency, department, employee, or other entity of the United States Government, the use, duplication, reproduction, release, modification, disclosure, or transfer of the Application, including technical data or manuals, is restricted by the terms, conditions and covenants contained in these Terms and Conditions. In accordance with Federal Acquisition Regulation 12.212 for civilian agencies and Defense Federal Acquisition Regulation Supplement 227.7202 for military agencies, use of the Application is further restricted by these Terms and Conditions.


    The Application may be subject to export controls or restrictions by the United States or other countries or territories. You agree to comply with all applicable U.S. and international export laws and regulations. These laws include restrictions on destinations, end users, and end use.


    These Terms and Conditions will continue to apply until terminated by either you or The Company as set forth below. You may terminate these Terms and Conditions at any time by permanently deleting the Application from your mobile device in its entirety. Your rights automatically and immediately terminate without notice from The Company or any Third Party if you fail to comply with any provision of these Terms and Conditions. In such event, you must immediately delete the Application.


    To the maximum extent permitted by law, you agree to defend, indemnify and hold harmless The Company, its affiliates and their respective directors, officers, employees and agents from and against any and all claims, actions, suits or proceedings, as well as any and all losses, liabilities, damages, costs and expenses (including reasonable attorneys fees) arising out of or accruing from your use of the Application, including your downloading, installation, or use of the Application, or your violation of these Terms and Conditions.



    1. These Terms and Conditions constitute the entire Agreement between you and The Company relating to the Application and govern your use of the Application, and completely replace any prior or contemporaneous agreements between you and The Company regarding the Application.
    2. The failure of The Company to exercise or enforce any right or provision of these Terms and Conditions does not constitute a waiver of such right or provision, which will still be available to The Company.
    3. If any court of law, having the jurisdiction to decide on this matter, rules that any provision of these Terms and Conditions is invalid, then that provision will be removed from the Terms and Conditions without affecting the rest of the Terms and Conditions. The remaining provisions of these Terms and Conditions will continue to be valid and enforceable.
    4. The rights granted in these Terms and Conditions may not be assigned or transferred by either you or The Company without the prior written approval of the other party. Neither you nor The Company are permitted to delegate their responsibilities or obligations under these Terms and Conditions without the prior written approval of the other party.
    5. These Terms and Conditions and your relationship with The Company under these Terms and Conditions will be governed by the laws of the State of California without regard to its conflict of laws provisions. You and The Company agree to submit to the exclusive jurisdiction of the courts located within the county of Santa Clara, California to resolve any legal matter arising from these Terms and Conditions. Notwithstanding this, you agree that The Company will still be allowed to apply for injunctive remedies (or an equivalent type of urgent legal relief) in any jurisdiction.
    6. The Company reserves the right to terminate access to servers from any application for any reason without notice.
    7. The Company reserves the right to issue refunds to premium users for any reason without notice.

OpenStreetMap tiles are provided through the MapQuest Open Services pursuant to the Creative Commons - Attribution-Sharealike License. 2.0, the terms of which are available at OpenStreetMap data license details available at or

Privacy Policy

Privacy Policy

Last modified: June 30, 2013

Information we collect

  • RadarNow! collects no consumer identifying data.
  • RadarNow! collects and transmits an encrypted version of the consumer's Google account for the purpose of tracking premium access. Google accounts for consumers NOT using premium are not stored on our servers.
  • The encryption method for Google accounts is an MD5 hash of the Google account. It is impossible (for us) to convert this MD5 hash back into the Google account. We collect, transmit and store only the encrypted Google account.
  • The names, addresses, email accounts, telephone numbers, social security numbers or any other information that identifies a particular consumer ARE NOT COLLECTED OR STORED by the application RadarNow! or RadarNow!'s servers.
  • RadarNow! does collect location information for each device running RadarNow! for the purpose of providing alerts pertinent to the user's location. There is no way to identify individuals from this data. Location information is obfuscated somewhat to keep the location fairly coarse, on the order of 500 to 1000 meters.

Information we share

  • We do not share information with companies, organizations and individuals outside of USNaviguide LLC.

Information security

We work hard to protect USNaviguide LLC and our users from unauthorized access to or unauthorized alteration, disclosure or destruction of information we hold. In particular:

  • We encrypt Google accounts prior to transmitting that data to our servers.
  • We restrict access to all information to USNaviguide LLC employees, contractors and agents who need to know that information in order to process it for us, and who are subject to strict contractual confidentiality obligations and may be disciplined or terminated if they fail to meet these obligations.


  • We regularly review our compliance with our Privacy Policy. We also adhere to several self regulatory frameworks. When we receive formal written complaints, we will contact the person who made the complaint to follow up. We work with the appropriate regulatory authorities, including local data protection authorities, to resolve any complaints regarding the transfer of personal data that we cannot resolve with our users directly.


  • Our Privacy Policy may change from time to time. We will not reduce your rights under this Privacy Policy without your explicit consent.

Contact us!

Please use the "Contact us" form inside RadarNow! (menu-settings-contact us) with any suggestions, ideas or just want to let us know what you think of RadarNow!.

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