Extreme Heat Across the Southern U.S.; Severe Thunderstorms and Heavy Rain in the Plains and Mississippi Valley

A heat wave over the Southwest will intensify late week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms and heavy rain are expected over portions of the Plains and Mississippi Valley tonight, which will shift to parts of the Upper Midwest and mid-Mississippi Valley Friday. Monsoonal showers and flooding persist in the Desert Southwest. 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
507 FTUS46 KSEW 310535 TAFSEA TAF KSEA 310535Z 3106/0112 35005KT P6SM SKC FM311100 03004KT P6SM SKC FM311700 33006KT P6SM SKC FM010200 28006KT P6SM SCT250 FM010700 21007KT P6SM SCT250=
504 FTUS46 KSEW 310535 TAFBFI TAF KBFI 310535Z 3106/0106 30005KT P6SM SKC FM310800 VRB03KT P6SM SKC FM311800 31005KT P6SM SKC FM010500 29002KT P6SM SCT250=

506 FTUS46 KSEW 310535 TAFPAE TAF KPAE 310535Z 3106/0106 36005KT P6SM SKC FM310900 36004KT P6SM SKC FM311800 32005KT P6SM SKC FM010100 35006KT P6SM FEW250=

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Extreme Heat Across the Southern U.S.; Severe Thunderstorms and Heavy Rain in the Plains and Mississippi Valley

Puget Sound Convergence Zone