National Weather Service United States Department of Commerce

Tracking Late Season Winter Storms; Unusual Early-Season Heat Wave in the Southwest

Heavy snow and high winds continue in the Great Lakes and Northeast. A moderate atmospheric river will continue to bring heavy precipitation to the Pacific Northwest and northern Rockies. A major winter storm will develop across the northern High Plains tonight into Saturday and rapidly strengthen as it moves into the Great Lakes on Sunday. Above-average temperatures expected in the Southwest. 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


665
FTUS46 KSEW 140304 AAC
TAFSEA
TAF AMD
KSEA 140304Z 1403/1506 VRB02KT 1SM -SN BR BKN005 OVC012
FM140500 VRB03KT 1SM BR VCSH BKN004 OVC007
FM140700 VRB03KT 1/2SM -SHRASN FG OVC003
FM141500 17007KT P6SM VCSH SCT007 OVC015
FM141800 20008KT P6SM SCT015 BKN050
FM142100 21008KT P6SM BKN100=
 
 

362
FTUS46 KSEW 140226 AAA
TAFBFI
TAF AMD
KBFI 140226Z 1402/1424 00000KT 3SM -SN BR OVC005
FM140400 VRB03KT 2SM -SHRASN BKN007 OVC015
FM141500 18007KT P6SM VCSH OVC022
FM141700 18010KT P6SM BKN050
FM142100 22009KT P6SM BKN100=
 
 
   

281
FTUS46 KSEW 140235 AAA
TAFPAE
TAF AMD
KPAE 140235Z 1403/1424 00000KT 3SM -SN BR BKN002 OVC007
TEMPO 1403/1407 1/2SM FG OVC002
FM140700 VRB04KT 2SM -SHRASN SCT002 OVC007
FM141500 25005KT P6SM -SHRA OVC015
FM141800 25005KT P6SM BKN025 BKN050=