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Radar valid at 600 am PDT, Aug 9th 2017

alert legend

WAZ001-503-504-506-507-509>517-555-556-558-559-567>569-091300-
San Juan County-Western Whatcom County-Southwest Interior-
Western Skagit County-Everett and Vicinity-Tacoma Area-
Admiralty Inlet Area-Hood Canal Area-Lower Chehalis Valley Area-
Olympics-Eastern Strait of Juan de Fuca-
Western Strait of Juan De Fuca-North Coast-Central Coast-
East Puget Sound Lowlands-Bellevue and Vicinity-
Seattle and Vicinity-Bremerton and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
202 PM PDT Tue Aug 8 2017


...AN AIR QUALITY ALERT CONTINUES FOR WESTERN WASHINGTON THROUGH
NOON THURSDAY...

A strong upper level ridge will keep a dry stable air mass over
Western Washington through at least Thursday. Weak low level
onshore flow Tuesday morning had brought cleaner marine air to
the coast and areas near the Strait of Juan de Fuca. For the
interior lowlands of Western Washington, however, air quality in
most areas has remained unhealthy for sensitive groups. A few
spots were worse with unhealthy air.

Northerly flow aloft will continue to transport smoke into
Western Washington from wildfires in British Columbia through at
least Wednesday. In addition, atmospheric ventilation in the
interior lowlands of Western Washington will remain poor. Weak low
level onshore flow will continue to bring better air quality to
the coast and areas along the Strait of Juan de Fuca.

The smoke and hazy skies will continue to plague Western
Washington for the next few days. A change to southwest flow
aloft late Thursday could start to push the smoke out of the
area.

People with respiratory ailments like asthma can find more
information, including current air quality, at the following
websites...

wasmoke.blogspot.com
airnow.gov

Additional regional information...

Puget Sound area...pscleanair.org
Southwest Washington...swcleanair.org
Olympic region...orcaa.org
Northwest region...nwcleanairwa.gov

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