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


090
FTUS46 KSEW 161459 AAA
TAFSEA
TAF AMD
KSEA 161459Z 1615/1718 16005KT P6SM VCSH SCT008 BKN012
FM161800 21006KT P6SM BKN040
FM162300 22008KT P6SM SCT050 SCT250
FM170500 21008KT P6SM BKN060
FM171100 17005KT P6SM BKN035=
 
 

669
FTUS46 KSEW 161500 AAA
TAFBFI
TAF AMD
KBFI 161500Z 1615/1712 14006KT P6SM VCSH BKN015
FM161800 18005KT P6SM BKN050
FM170000 20007KT P6SM SCT050 SCT250
FM170500 20006KT P6SM BKN060
FM171100 17004KT P6SM BKN035=
 
 
   

986
FTUS46 KSEW 161522 AAA
TAFPAE
TAF AMD
KPAE 161522Z 1615/1712 19006KT P6SM BKN003 OVC025
FM161700 21005KT P6SM BKN025
FM162000 23007KT P6SM SCT050 SCT250
FM170400 36005KT P6SM BKN050=