National Weather Service United States Department of Commerce

Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. 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


686
FTUS46 KSEW 190902 AAA
TAFSEA
TAF AMD
KSEA 190902Z 1909/2012 24003KT P6SM BKN023 OVC060
FM191100 19005KT P6SM OVC020
FM192100 22007KT P6SM BKN025 OVC040
FM200300 26005KT P6SM OVC040=
 
 

814
FTUS46 KSEW 190520
TAFBFI
TAF
KBFI 190520Z 1906/2006 VRB03KT P6SM SCT080 OVC100
FM190800 12005KT P6SM SCT045 OVC080
FM191200 19005KT P6SM OVC035
FM191700 19005KT P6SM OVC025
FM192100 23007KT P6SM BKN030 OVC045
FM200300 VRB04KT P6SM OVC045=
 
 
   

823
FTUS46 KSEW 190520
TAFPAE
TAF
KPAE 190520Z 1906/2006 36008KT P6SM BKN080
FM190800 02004KT P6SM OVC050
FM191100 VRB03KT P6SM OVC025
FM191600 19004KT P6SM OVC020
FM200000 33005KT P6SM OVC030=