Puget Sound Convergence Zone

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
996 FTUS46 KSEW 120848 AAA TAFSEA TAF AMD KSEA 120848Z 1209/1312 22012KT P6SM FEW020 BKN040 FM121200 20008KT P6SM BKN025 BKN040 FM121800 27003KT P6SM FEW030 SCT250 FM122100 36010KT P6SM SCT250 FM130500 03006KT P6SM FEW250=
149 FTUS46 KSEW 120848 AAA TAFBFI TAF AMD KBFI 120848Z 1209/1306 22009G18KT P6SM FEW025 BKN040 FM121200 18006KT P6SM BKN025 BKN060 FM121800 30002KT P6SM SCT030 BKN060 FM122100 34009KT P6SM SCT250 FM130500 03006KT P6SM FEW250=

827 FTUS46 KSEW 120927 AAB TAFPAE TAF AMD KPAE 120927Z 1209/1306 22010KT P6SM BKN025 FM121200 12006KT P6SM OVC025 FM121700 33004KT P6SM SCT035 BKN050 FM130000 35011KT P6SM SCT250 FM130500 36006KT P6SM SCT250=