Weather Radar Warnings

Weather disasters caused almost 500 deaths between 2000 and 2009 across the United States, according to the National Weather Service. To help prevent casualties, the National Oceanic and Atmospheric Administration (NOAA), which oversees the National Weather Service, broadcasts warnings, watches and alerts via weather radio. Meteorologists study weather radar and issue alerts to prepare citizens for emergencies. A warning means dangerous weather is imminent or already occurring in the target area.

Winter Warnings

• Winter storms are more difficult than other precipitation, like rain, to detect on radar, because snow is lighter than rain, according to the National Weather Service. Ice and sleet, on the other hand, are easier to pinpoint and track. Winter alerts include winter storm warnings and blizzard warnings, which are storms having winds of at least 35 mph in strength, with reduced visibility for several hours and treacherous wind chill.

Storm Warnings

• Meteorologists and storm chasers closely track thunderstorms and other weather phenomenons, like tornadoes. Storm watchers monitor conditions closely for severe thunderstorm warnings, tornado warnings (which means a tornado has been spotted in the area) and tropical storm and hurricane warnings (which means those weather conditions are expected within 36 hours). When a warning is issued, take cover and make your way to safety.

Flood Warnings

• The National Weather Service has three different radar warnings pertaining to flooding. These include a normal flood warning, which means flooding is imminent; flash flood warning, which involves sudden and forceful flooding caused by torrential rains or faulty dams; and coastal flooding, which pertains to sea water rushing in at high tide.

Heat Warnings

• Although not as common as winter- or rain-specific warnings, heat warnings are also tracked on radar by meteorologists. An excessive heat warning means conditions of heat and humidity combine to dangerous levels for residents of the warning area, especially the elderly and those without fans and air conditioning.