Air Stagnation Advisory - Tacoma Area (Washington)
Updated: Sat 04-Feb-12 06:33am PST Effective: Sat 04-Feb-12 06:33am PST Expires: Sat 04-Feb-12 04:30pm PST	Severity: Minor Urgency: Expected Certainty: Likely	Status: Actual Type: Alert Category: Met
Areas affected: Hood Canal Area; Lower Chehalis Valley Area; Southwest Interior; Tacoma Area
Instructions: An air stagnation advisory means that limited movement of the air mass over the advisory area will allow pollution to increase to dangerous levels. Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution. Message summary: ...air stagnation advisory remains in effect until 4 pm pst monday for areas around south puget sound... .a ridge of high pressure over the pacific northwest will keep the weather dry through monday and will allow a strong temperature inversion to form. Gusty east winds are expected near the cascade foothills from gold bar to enumclaw...but light winds are expected elsewhere...especially over areas around south puget sound. In places with light winds...the air will gradually become stagnant with little mixing. Over time...pollutants will build up in the stagnant air. ...air stagnation advisory remains in effect until 4 pm pst monday... * air quality...likely to deteriorate as the period of stagnant air continues. * restrictions/burn bans...contact your local air pollution control agency for information about potential burn bans. ...view the complete message

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Source: NWS Watches, Warnings or Advisories for zone WAZ509

Air Stagnation Advisory - Pierce (Washington)
Updated: Sat 04-Feb-12 06:33am PST Effective: Sat 04-Feb-12 06:33am PST Expires: Sat 04-Feb-12 04:30pm PST	Severity: Minor Urgency: Expected Certainty: Likely	Status: Actual Type: Alert Category: Met
Areas affected: Hood Canal Area; Lower Chehalis Valley Area; Southwest Interior; Tacoma Area
Instructions: An air stagnation advisory means that limited movement of the air mass over the advisory area will allow pollution to increase to dangerous levels. Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution. Message summary: ...air stagnation advisory remains in effect until 4 pm pst monday for areas around south puget sound... .a ridge of high pressure over the pacific northwest will keep the weather dry through monday and will allow a strong temperature inversion to form. Gusty east winds are expected near the cascade foothills from gold bar to enumclaw...but light winds are expected elsewhere...especially over areas around south puget sound. In places with light winds...the air will gradually become stagnant with little mixing. Over time...pollutants will build up in the stagnant air. ...air stagnation advisory remains in effect until 4 pm pst monday... * air quality...likely to deteriorate as the period of stagnant air continues. * restrictions/burn bans...contact your local air pollution control agency for information about potential burn bans. ...view the complete message

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Source: NWS Watches, Warnings or Advisories for zone WAC053

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