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2. Weather radar - Wikipedia

   en.wikipedia.org/wiki/Weather_radar

   Weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.). Modern weather radars are mostly pulse-Doppler radars, capable of detecting the motion of rain droplets in addition to the intensity of the ...

3. Doppler radar - Wikipedia

   en.wikipedia.org/wiki/Doppler_radar

   A Doppler radar is a specialized radar that uses the Doppler effect to produce velocity data about objects at a distance. [1] It does this by bouncing a microwave signal off a desired target and analyzing how the object's motion has altered the frequency of the returned signal.

4. Hurricane tracker: Where is Tropical Storm Helene headed? - AOL

   www.aol.com/news/hurricane-tracker-where...

   (FOX Weather) The system is moving northwest, and that general motion is expected into Tuesday night, followed by a faster northward to north-northeastward motion on Wednesday and Thursday.

5. Storm tracker: Tropical Storm Helene forms, expected to make ...

   www.aol.com/storm-tracker-potential-tropical...

   The system is moving northwest at about 12 mph, and this motion is expected to continue through early Wednesday, according to the NHC, followed by a north-northeastward motion at a faster forward ...

6. Hurricane tracker: Could Helene impact DC area? Current ... - AOL

   www.aol.com/news/hurricane-tracker-could-helene...

   Forecast models currently predict it will reach Category 2 status and make landfall near ... and that general motion is expected into Tuesday night, followed by a faster northward to north ...

7. NEXRAD - Wikipedia

   en.wikipedia.org/wiki/NEXRAD

   NEXRAD or Nexrad (Next-Generation Radar) is a network of 159 high-resolution S-band Doppler weather radars operated by the National Weather Service (NWS), an agency of the National Oceanic and Atmospheric Administration (NOAA) within the United States Department of Commerce, the Federal Aviation Administration (FAA) within the Department of Transportation, and the U.S. Air Force within the ...