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
369 FTUS46 KSEW 092052 AAA TAFSEA TAF AMD KSEA 092052Z 0921/1024 VRB04KT P6SM FEW030 BKN120 FM100300 30006KT P6SM FEW250 FM101000 22005KT P6SM SCT020 BKN060 FM101200 22005KT P6SM SCT009 BKN015 FM101700 21007KT P6SM OVC020=
338 FTUS46 KSEW 091720 TAFBFI TAF KBFI 091720Z 0918/1018 VRB03KT P6SM BKN020 FM091900 31004KT P6SM SCT025 BKN120 FM100500 VRB03KT P6SM FEW025 FEW250 FM101000 17004KT P6SM SCT025 BKN060 FM101300 22005KT P6SM SCT009 BKN015=

347 FTUS46 KSEW 091720 TAFPAE TAF KPAE 091720Z 0918/1018 34004KT P6SM SCT100 FM092200 36007KT P6SM FEW250 FM100900 VRB03KT P6SM SCT025 SCT250 FM101400 13005KT P6SM OVC015=