936
FXUS01 KWBC 062101
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
400 PM EST FRI NOV 06 2009
VALID 00Z SAT NOV 07 2009 - 12Z SUN NOV 08 2009
A SOGGY WEATHER PATTERN WILL IMPACT MUCH OF THE PACIFIC NORTHWEST
AND INTO THE UPPER INTERMOUNTAIN WEST THROUGH THE WEEKEND AS A
SERIES OF DISTURBANCES SURGE THROUGH THE REGION. A PERSISTENT
ONSHORE FLOW OFF THE EASTERN PACIFIC WILL CONTINUE TO DRIVE
MOISTURE INLAND WHICH WILL ALLOW FOR PRECIPITATION TO PERSIST
ACROSS THE NORTHWESTERN U.S. THIS WILL BRING A COOL DREARY WEEKEND
TO THE AREA WITH HIGHS MAINLY IN THE 40S AND 50S ACCOMPANIED BY
ABUNDANT CLOUD COVER AND WIDESPREAD SHOWER ACTIVITY. THE FOCUS FOR
HEAVIER PRECIPITATION WILL BE ALONG THE WINDWARD SLOPES OF THE
COASTAL OLYMPIC RANGE AND THE CASCADES WHERE OROGRAPHIC LIFT WILL
BRING LOCAL ENHANCEMENTS TO THE REGION. AS ENOUGH COLD AIR WILL
REMAIN IN PLACE INTO THE WEEKEND...THE LOCAL MOUNTAIN RANGES ARE
EXPECTED TO SEE WIDESPREAD LIGHT TO MODERATE SNOWFALL INTO EARLY
SUNDAY.
WHILE OTHER AREAS OF THE UNITED STATES WILL BE FREE OF
PRECIPITATION THIS WEEKEND...SOME UNSETTLED WEATHER WILL BE IN
STORE FOR THE FLORIDA KEYS ALONG WITH EXTREME SOUTH TEXAS. ACROSS
THE SUNSHINE STATE...SCATTERED SHOWERS AND THUNDERSTORMS WILL
DEVELOP IN RESPONSE TO THE STRONG EAST-NORTHEASTERLY WINDS WITH
THE BEST PRECIPITATION CHANCES ACROSS THE FLORIDA KEYS WHICH WILL
RESIDE NEAR A STALLED FRONTAL BOUNDARY. ELSEWHERE...AN INVERTED
TROUGH ACROSS THE WESTERN GULF WILL SET A FOCUS FOR SCATTERED
THUNDERSTORMS BY EARLY SUNDAY MORNING OVER SOUTHERN TEXAS.
EAST OF THE INTERMOUNTAIN WEST...CONDITIONS WILL BE TRANQUIL ALL
THE WAY TO THE EASTERN SEABOARD THROUGH THE WEEKEND. AN UPPER
RIDGE CURRENTLY RESIDING OVER THE MISSISSIPPI RIVER VALLEY WILL
TREK EASTWARD AND SETTLE OVER THE EAST COAST BY EARLY SATURDAY.
THIS AXIS OF HIGH PRESSURE ALOFT WILL BRING ABUNDANT SUNSHINE AND
MILD CONDITIONS WITH HIGHS ALREADY IN THE 70S AND 80S ACROSS THE
SOUTHERN AND CENTRAL PLAINS TODAY. WHILE THESE READINGS WILL NOT
BE REACHED ALONG THE EASTERN SEABOARD...HIGHS WILL EASILY REACH
THE 60S ON SATURDAY AND SUNDAY. BUT NOT BEFORE A COLD START TO THE
DAY ON SATURDAY...AS A SURFACE DOME OF HIGH PRESSURE WILL ALLOW
FOR TEMPERATURES TO HOVER NEAR THE FREEZING MARK OVERNIGHT. IN
RESPONSE...FREEZE WARNINGS AND FROST ADVISORIES HAVE ALREADY BEEN
ISSUED BY SOME FORECAST OFFICES ACROSS THE CAROLINAS AND
SOUTHEASTERN U.S.
RUBIN-OSTER
GRAPHIC AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
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