.DISCUSSION...THE STRONG UPPER LEVEL RIDGE BUILDING OFFSHORE WILL
DOMINATE THE WEATHER PATTERN THROUGH NEXT WEEKEND...PRODUCING A
PROLONGED PERIOD OF VERY DRY WEATHER AND LIGHT EAST WINDS.
SURFACE HIGH PRESSURE BUILDING OVER SOUTHERN BRITISH COLUMBIA THIS
AFTERNOON IS MOVING A VERY DRY AIR MASS SOUTHWARD OVER EASTERN
WASHINGTON AND THE CASCADES. AS THE HIGH SLIDES SOUTHEAST OVER THE
ROCKIES TONIGHT...EASTERLY WINDS WILL BEGIN DEVELOPING ACROSS
WESTERN WASHINGTON. THE COMBINATION OF THE ALREADY DRY AIR AND THE
EASTERLY FLOW WILL CAUSE RELATIVE HUMIDITIES TO DROP INTO THE 20 TO
35 PERCENT RANGE THE NEXT FEW DAYS WITH POOR TO MARGINAL HUMIDITY
RECOVERY AT NIGHT.
THE STRONG RIDGE WILL REMAIN ANCHORED OFFSHORE INTO EARLY NEXT WEEK
PUTTING WESTERN WASHINGTON IN A PROLONGED PERIOD OF DRY EASTERLY
WINDS. THE WINDS WILL REMAIN PREDOMINANTLY LIGHT...BUT THERE COULD
BE SHORT PERIODS OF LOCALIZED MODERATE EAST WINDS THROUGH FRIDAY.