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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 ...
A NEXRAD weather radar currently used by the National Weather Service (NWS) is a 10 cm wavelength (2700-3000 MHz) radar capable of a complete scan every 4.5 to 10 minutes, depending on the number of angles scanned, and depending on whether or not MESO-SAILS is active, which adds a supplemental low-level scan while completing a volume scan. Its ...
Doppler effect. The emitted signal toward the car is reflected back with a variation of frequency that depends on the speed away/toward the radar (160 km/h). This is only a component of the real speed (170 km/h). The Doppler effect (or Doppler shift), named after Austrian physicist Christian Doppler who proposed it in 1842, is the difference ...
Also called inland hurricanes due to their appearance on radar and prolific wind damage, derechos produce widespread winds of at least 58 mph across an area at least 400 miles long.
PHILADELPHIA - Another round of storms will roll across parts of the Delaware Valley on Thursday and bring a cold front that will lessen the mugginess ahead of a sunny weekend.. Leftover remnants ...
Get the New York, NY local weather forecast by the hour and the next 10 days.
The Army Signal Service established a federal weather office in the region on June 13, 1888. On April 1, 1930, the Wichita Municipal Airport (currently McConnell Air Force Base) weather office opened. Pilot Balloons were sent at 5:30 am and pm each day, and from April 1, 1930, to November 29, 1940, there were two Weather Bureau Offices in Wichita.
Local on the 8s (or the Local Forecast) is a program segment that airs on the American network The Weather Channel.It provides viewers with information on current and forecasted weather conditions for their respective area; a version of this segment is also available on the channel's national satellite feed that features forecasts for each region of the United States.
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