Severe Thunderstorms from the Midwest to Mid-Atlantic Tonight; The Heat Continues in the Southern and Eastern U.S.

Strong to severe thunderstorms capable of producing large to very large hail, damaging wind gusts and a few strong tornadoes are likely from the Midwest to the Mid-Atlantic tonight. Moderate Risk (level 4 of 5) of severe thunderstorms is outlooked for the Midwest. A widespread heat wave will peak in the South and East on Friday, with many temperature records expected to be broken. 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 .


Hover over or click station to get METAR and TAF (if available)	Wind Barbs, PIREPs, Radar, 10nm Range Rings, all sites except CWOP
706 FTUS46 KSEW 120520 TAFSEA TAF KSEA 120520Z 1206/1312 36008KT P6SM FEW070 FM120900 04005KT P6SM FEW040 FEW250 FM121700 29006KT P6SM FEW250 FM122300 35010KT P6SM FEW250 FM130500 03005KT P6SM FEW250=
705 FTUS46 KSEW 120520 TAFBFI TAF KBFI 120520Z 1206/1306 00000KT P6SM SCT060 FM121700 33006KT P6SM FEW250=

731 FTUS46 KSEW 120520 TAFPAE TAF KPAE 120520Z 1206/1306 36006KT P6SM FEW250 FM120900 VRB03KT P6SM SCT040 FM121700 33007KT P6SM FEW250=

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Severe Thunderstorms from the Midwest to Mid-Atlantic Tonight; The Heat Continues in the Southern and Eastern U.S.

Puget Sound Convergence Zone