National Weather Service United States Department of Commerce

Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. 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


473
FTUS46 KSEW 190900 AAA
TAFSEA
TAF AMD
KSEA 190900Z 1909/2012 03006KT P6SM SCT200
FM191200 02008KT P6SM BKN200
FM192000 33007KT P6SM SCT150 BKN200
FM200600 03006KT P6SM SCT250=
 
 

619
FTUS46 KSEW 190520
TAFBFI
TAF
KBFI 190520Z 1906/2006 VRB03KT P6SM BKN100
FM191500 34003KT P6SM BKN200
FM192200 32006KT P6SM BKN200
FM200300 31002KT P6SM BKN200=
 
 
   

621
FTUS46 KSEW 190520
TAFPAE
TAF
KPAE 190520Z 1906/2006 03004KT P6SM SCT200
FM190900 06003KT P6SM BKN150 BKN200
FM191500 02003KT P6SM BKN200
FM191800 35006KT P6SM BKN200
FM200000 31004KT P6SM BKN200=