HAZARDOUS WEATHER OUTLOOK
Issue Date: 552 AM PST FRI DEC 25 2009
Expiration: 600 AM PST SAT DEC 26 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST
OREGON AND SOUTHWEST WASHINGTON.
.DAY ONE...TODAY AND TONIGHT
AIR STAGNATION ADVISORY IN EFFECT FOR NORTHERN CLARK
COUNTY...COWLITZ VALLEY...CENTRAL AND SOUTH WILLAMETTE VALLEY. A
STRONG PERSISTENT SURFACE BASED TEMPERATURE INVERSION HAS
RESULTED IN LIMITED MIXING OF THE NEAR SURFACE AIR. THIS WILL
RESULT IN SLOWLY DEGRADING AIR QUALITY.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY
AIR STAGNATION ADVISORY REMAINS IN EFFECT THROUGH 6 PM SATURDAY FOR
NORTHERN CLARK COUNTY...COWLITZ VALLEY...CENTRAL AND SOUTH WILLAMETTE
VALLEY. A STRONG PERSISTENT SURFACE BASED TEMPERATURE INVERSION
HAS RESULTED IN LIMITED MIXING OF THE NEAR SURFACE AIR. THIS WILL
RESULT IN SLOWLY DEGRADING AIR QUALITY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED.
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