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
819 FTUS46 KSEW 141120 TAFSEA TAF KSEA 141120Z 1412/1518 20012G22KT P6SM BKN018 OVC030 FM141700 19014G25KT 6SM -RA BKN018 OVC025 FM142100 20017G29KT 4SM -RA OVC022 FM150500 18010G18KT P6SM VCSH OVC035 FM150900 15010KT P6SM OVC035 FM151400 20008KT P6SM VCSH BKN027 OVC035=
818 FTUS46 KSEW 141120 TAFBFI TAF KBFI 141120Z 1412/1512 17011G21KT P6SM BKN025 OVC040 FM141700 18015G22KT 6SM -RA BKN018 OVC030 FM142100 19018G26KT 3SM -RA BR OVC022 FM150500 18010G18KT P6SM VCSH OVC035 FM150900 15010KT P6SM OVC035=

821 FTUS46 KSEW 141120 TAFPAE TAF KPAE 141120Z 1412/1512 17010KT P6SM BKN015 OVC025 FM141700 16018G26KT 5SM -RA OVC015 FM142100 18025G35KT 3SM -RA BR OVC015 FM150300 32017G25KT 6SM BR VCSH OVC025 FM151000 17010KT P6SM BKN027=