Via Weather.com. Various alerts have been posted covering the entire Washington/Oregon region. For information covering your area, see–

• NOAA Advisory

• Weather.com Advisories

HEAT/AIR-STAGNATION WARNINGS

WESTERN WHATCOM COUNTY- SOUTHWEST INTERIOR-WESTERN SKAGIT COUNTY- HOOD CANAL AREA-LOWER CHEHALIS VALLEY AREA- WEST SLOPES NORTHERN CASCADES AND PASSES- WEST SLOPES CENTRAL CASCADES AND PASSES- 110 PM PDT THU AUG 14 2008

…AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT SATURDAY…

HIGH PRESSURE ALOFT WILL DOMINATE WESTERN WASHINGTON THROUGH SATURDAY. THIS WILL ALLOW A VERY WARM AIR MASS TO DEVELOP OVER WESTERN WASHINGTON INCLUDING THE ENTIRE I-5 URBAN CORRIDOR. HIGH TEMPERATURES IN THE 80S TO LOWER 90S THURSDAY WILL WARM FURTHER FRIDAY AND SATURDAY INTO THE UPPER 80S TO NEAR 100 DEGREES. IN ADDITION…MOSTLY CLEAR SKIES AT NIGHT WILL CREATE A TEMPERATURE INVERSION… LIMITING DISPERSION OF POLLUTANTS. THEREFORE…THE PUGET SOUND CLEAR AIR AGENCY HAS ISSUED A SMOG WATCH FOR KING…PIERCE…SNOHOMISH…AND KITSAP COUNTIES.

OZONE LEVELS WILL PEAK DURING THE AFTERNOON HOURS..REACHING UNHEALTHY LEVELS. PEOPLE WITH LUNG AILMENTS MAY WANT TO RESTRICT OUTDOOR ACTIVITY DURING THE WARMEST PART OF THE DAY. IF YOU ARE CONCERNED ABOUT THE EFFECTS OF HOT WEATHER AND THE BUILDUP OF POLLUTANTS…CHECK WITH THE PUGET SOUND CLEAN AIR AGENCY OR YOUR LOCAL AIR QUALITY AGENCY FOR FURTHER INFORMATION.

Other useful links:

• Hot weather precautions from the Washington State Department of Health
  
• Heat exhaustion (”sunstroke”) symptoms and treatment.
• Extreme Heat tips from the Centers for Disease Control and Prevention
• Facts about sunscreen from the Melanoma Foundation