A Blizzard Watch is an advisory issued by the
National Weather Serviceof the United Stateswhich means winds greater than convert|35|mph|kn km/h|0, mixed with falling or blowing snow, and visibilities of convert|1/4|mi|km|1 or less is forecast for a period of 3 hours or more. A blizzard watch is issued 36 to 12 hours before an expected blizzard event.
Example of a blizzard watchURGENT - WINTER WEATHER MESSAGENATIONAL WEATHER SERVICE GRAND FORKS ND1037 AM CST THU FEB 7 2008
...BLIZZARD WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHTTHROUGH SATURDAY AFTERNOON...
A BLIZZARD WATCH REMAINS IN EFFECT FROM LATE FRIDAY NIGHT THROUGHSATURDAY AFTERNOON.
A STRONG ARCTIC FRONT IS EXPECTED TO MOVE EAST OF THE RED RIVERVALLEY LATE FRIDAY NIGHT...BRINGING A SURGE OF WIND AND COLD AIRWITH IT. NORTHWEST WINDS GUSTING TO 45 MPH ARE POSSIBLE...WHICHWOULD CAUSE NEAR ZERO VISIBILITIES DUE TO BLOWING SNOW...ESPECIALLY IN OPEN COUNTRY. ONLY AN INCH OR SO OF NEW SNOW ISEXPECTED...BUT THIS ALONG WITH SOME FRESH SNOW ALREADY ON THEGROUND...WOULD LIKELY BE ENOUGH TO CAUSE GROUND BLIZZARDCONDITIONS. MILD TEMPERATURES ON FRIDAY WILL BE REPLACED BYSUBZERO READINGS BY SATURDAY MORNING. THIS WILL RESULT INDANGEROUS WIND CHILL VALUES...RANGING FROM 20 BELOW TO 40 BELOWZERO BY SATURDAY MORNING.
A BLIZZARD WATCH MEANS THERE IS A POTENTIAL FOR FALLING AND/ORBLOWING SNOW WITH STRONG WINDS AND EXTREMELY POOR VISIBILITIES.THIS CAN LEAD TO WHITEOUT CONDITIONS AND MAKE TRAVEL VERYDANGEROUS.
Winter storm watch
Severe weather terminology (United States)
* [http://www.nws.noaa.gov/ National Weather Service]
* [http://www.nws.noaa.gov/glossary/index.php?word=Blizzard Blizzard - NOAA/NWS Glossary]
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