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US Radar - previous 6 hours

Images provided by Unisys Weather


These composite radar images identify echo tops, storm movement, TVS (Tornadic Vortex Signatures), MESO (Mesocyclone) signatures and watch boxes for the prior six hours. Severe weather watch areas are numbered and enclosed in white boxes. The watch number, type of watch (T=Tornado, S=Severe Thunderstorm) and the watch expiration time (UTC) appear below the intensity scale. Types of precipitation are color coded and detailed in the table below:

RAINSLEETSNOW
dBZRate
(in/hr)
IntensitydBZRate
(in/hr)
IntensitydBZRate
(in/hr)
Intensity
5< 0.01Hardly Noticeable      
10< 0.01Light Mist      
150.01Mist      
200.02Very Light200.02Very Light200.02Very Light
250.05Light250.05Light250.05Light
300.1Light to Moderate300.1Light to Moderate300.1Light to Moderate
350.22Moderate350.22Moderate350.22Moderate
400.45Moderate400.45Moderate400.45Moderate
450.92Moderate to Heavy450.92Moderate to Heavy450.92Moderate to Heavy
501.9Heavy501.9Heavy501.9Heavy
554Very Heavy / Small Hail554Very Heavy554Very Heavy
608Extreme / Moderate Hail608Extreme608Extreme
6516.6Extreme / Large Hail6516.6Extreme6516.6Extreme

NOTE: Using METAR data from a large number of ground stations and aircraft, the winter mosaic is modified to identify freezing and frozen precipitation. The unique color codes in the dBZ scale from 80dBZ to 180dBZ represent freezing rain, or SLEET, and the unique color codes from 180dBZ to 280dBZ represent frozen rain, or SNOW. The actual dBZ values are shown in the table above.