National Weather Service United States Department of Commerce

Dangerous Cold Weather for Most of the Country; Rare Winter Storm for the South; Fire Weather Concerns for Southern California

Arctic air will filter south and east through early this week. As this cold air moves across the South, a rare winter storm is forecast to develop from Texas, Gulf Coast States into the Southeast through early this week. Several new daily record low temperatures are expected, including new record-low maximum temperatures. For Southern California, fire weather concerns increase this week. 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.





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


180
FTUS46 KSEW 202320
TAFSEA
TAF
KSEA 202320Z 2100/2206 02006KT P6SM BKN250
FM210500 05003KT P6SM SCT250
FM211200 16004KT P6SM SCT250
FM212200 03004KT P6SM BKN250=
 
 

130
FTUS46 KSEW 202320
TAFBFI
TAF
KBFI 202320Z 2100/2124 32003KT P6SM BKN250
FM210500 VRB02KT P6SM SCT250
FM212100 34003KT P6SM SCT250=
 
 
   

036
FTUS46 KSEW 202320
TAFPAE
TAF
KPAE 202320Z 2100/2124 35005KT P6SM BKN250
FM210600 VRB04KT P6SM SCT250=