National Weather Service United States Department of Commerce

Severe Thunderstorms for the Center of the Nation; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. 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


658
FTUS46 KSEW 171720
TAFSEA
TAF
KSEA 171720Z 1718/1824 VRB04KT P6SM SCT030 BKN035 BKN230
FM171900 35003KT P6SM SCT030 BKN250
FM172200 32007KT P6SM BKN100
FM180300 02005KT P6SM BKN200
FM180900 03003KT P6SM BKN150=
 
 

664
FTUS46 KSEW 171720
TAFBFI
TAF
KBFI 171720Z 1718/1818 VRB03KT P6SM SCT040
FM171900 34003KT P6SM SCT040
FM172100 32006KT P6SM BKN100
FM180300 VRB03KT P6SM BKN250
FM180900 00000KT P6SM BKN150=
 
 
   

667
FTUS46 KSEW 171720
TAFPAE
TAF
KPAE 171720Z 1718/1818 33005KT P6SM BKN020
FM172000 31006KT P6SM SCT030
FM180000 32007KT P6SM SCT050 BKN250
FM180300 VRB03KT P6SM SCT250
FM180900 00000KT P6SM BKN150=