National Weather Service United States Department of Commerce
 

Winter Briefing


Current Hazards

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Observations

Rapid City Radar

Regional Radar

Bowman Radar

Local Storm Reports

Precipitation Forecast

Liquid Precipitation

Snowfall

Ice

Range of 3-Day Snowfall Possibilities

Probability of Snow Amounts

Additional Weather Elements

(mouse over day or period to see map below)

Winter Weather Definitions

Winter Storm WATCH:

A winter storm or blizzard is possible, but the timing and area affected are still uncertain.


Winter Storm WARNING:

A dangerous winter storm with snow, freezing precipitation, strong winds, and/or cold temperatures is expected or occurring.


Blizzard WARNING:

A severe winter storm with winds 35 mph or greater and snow or blowing snow, reducing visibility to less than 1/4 mile is expected or occurring.


Ice Storm WARNING:

Ice accumulations of 1/4 inch or more that could cause dangerous conditions and significant damage is expected or occurring.


Winter Weather ADVISORY:

Three to five inches of snow, blowing snow, light freezing precipitation, strong winds, and/or cold temperatures are expected or occurring.


Wind Chill WARNING:

Wind chill values -35 degrees F or colder.


Wind Chill ADVISORY:

Wind chill values between -25 degrees and -35 degrees F.


High Wind WARNING:

Sustained winds 40 mph or greater or wind gusts 58 mph or greater.


Wind ADVISORY:

Sustained winds 30 to 39 mph or wind gusts 45 to 57 mph.


Dense Fog ADVISORY:

Visibilities at or below 1/4 mile.


Freeze WARNING:

Temperatures 32 degrees or colder for several hours over a widespread area during the growing season, generally May 1 through October 15.


Frost ADVISORY:

Temperatures 33 to 36 degrees, clear skies, and light winds for several hours over a widespread area during the growing season, generally May 1 through October 15.