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


024
FTUS46 KSEW 160900 AAA
TAFSEA
TAF AMD
KSEA 160900Z 1609/1712 15006KT P6SM FEW010 SCT040 OVC070
FM161200 18011KT P6SM OVC025
FM161700 18009KT P6SM -RA OVC025
FM162000 21010KT P6SM OVC030
FM162300 21012KT P6SM OVC040
FM170400 19007KT P6SM VCSH OVC040=
 
 

997
FTUS46 KSEW 160901 AAA
TAFBFI
TAF AMD
KBFI 160901Z 1609/1706 12003KT P6SM OVC040
FM161200 16008KT P6SM OVC025
FM161700 16010KT P6SM -RA OVC030
FM162000 17010KT P6SM OVC035
FM162300 20007KT P6SM OVC045
FM170400 18005KT P6SM VCSH OVC040=
 
 
   

107
FTUS46 KSEW 160526
TAFPAE
TAF
KPAE 160526Z 1606/1706 14007KT P6SM -RA SCT004 SCT025 OVC035
FM161200 16011KT 4SM -RA BR SCT004 BKN020
FM161800 15013G23KT 2SM -RA BR OVC007
FM162100 16015G25KT P6SM SCT010 OVC020
FM170100 08012KT P6SM OVC030=