National Weather Service United States Department of Commerce

Major Winter Storm Ongoing in the Upper Midwest; Severe Weather Tonight from the Mid-South to the Ohio Valley

A major winter storm will continue to bring blizzard conditions, heavy snowfall, icing, and strong winds through Monday across the Upper Midwest and Upper Great Lakes. A line of storms will be capable of producing widespread damaging winds, tornadoes, and some large hail from the Mid-South to the Ohio Valley and the Southeast through tonight, moving into the Mid-Atlantic Monday. Read More >

A Puget Sound Convergence Zone (PSCZ) forms when strong westerly winds flow around the Olympic Peninsula and converge over Puget Sound. It generally forms north of Seattle, and may move southward to as far as Boeing Field or SeaTac Airport. A PSCZ can cause a narrow band of convective precipitation along it, which can include rain showers, thunderstorms, or snowfall. Strong south to southwest winds are to the south of the PSCZ and north to northwest winds to the north. More model information for the winds around SeaTac can be found on the SeaTac Wind Page .





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Wind Barbs, PIREPs, Radar, 10nm Range Rings, all sites except CWOP


894
FTUS46 KSEW 201128
TAFSEA
TAF
KSEA 201128Z 2012/2118 19006KT 6SM -RA BR SCT012 OVC030
FM201600 19010KT 5SM -RA BR OVC022
FM202100 21014G22KT 6SM -RA BR BKN027 BKN040
FM210300 05007KT P6SM VCSH BKN035
FM211000 25007KT P6SM OVC027=
 
 

895
FTUS46 KSEW 201128
TAFBFI
TAF
KBFI 201128Z 2012/2112 18006KT 5SM -RA BR SCT015 OVC035
FM201600 18011KT 6SM -RA BR OVC025
FM202100 20012G18KT 6SM -RA BR BKN030 BKN045
FM210300 VRB05KT P6SM VCSH OVC035
FM211000 22004KT P6SM OVC030=
 
 
   

897
FTUS46 KSEW 201128
TAFPAE
TAF
KPAE 201128Z 2012/2112 19020G30KT 6SM -RA BR SCT010 OVC035
TEMPO 2012/2016 BKN008 OVC024
FM201600 18015G25KT 6SM -RA BR OVC015
FM202200 23012G18KT P6SM VCSH OVC030
FM210300 33010KT P6SM VCSH BKN035
FM210800 32005KT P6SM BKN025=