058
FXUS01 KWBC 240812
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
411 AM EDT SUN AUG 24 2008
VALID 12Z SUN AUG 24 2008 - 00Z TUE AUG 26 2008
TROPICAL DEPRESSION FAY WILL CONTINUE TO STEER MOISTURE INTO THE
SOUTHEASTERN U.S....PUMMELING THE EASTERN GULF COAST WITH MORE
HEAVY TO MODERATE RAINS. EVEN THOUGH FAY HAS BEEN DOWNGRADED TO A
TROPICAL DEPRESSION BY NO MEANS HAVE THE HAZARDS DIMINISHED...THE
PRIMARY CONCERN BEING FLOODING. CURRENTLY...TROPICAL DEPRESSION
FAY IS OVER SOUTHERN ALABAMA IS PROGGED TO AMBLE WESTWARD...STALL
OUT ON SUNDAY AND THEN BEGIN LIFTING TOWARDS THE NORTHEAST BY DAY
3...AS A RESULT OF THE STEERING FLOW. CURRENTLY THE HEAVIEST
PRECIPITATION IS NORTH OF THE LOW PRESSURE CENTER. THE THREAT OF
EXCESSIVE RAINS WILL CONTINUE INTO MONDAY AND ARE EXPECTED ALONG
THE EASTERN PERIMETER OF THE CENTRAL CIRCULATION...ALTHOUGH A
BROAD SWATH OF SCATTERED PRECIPITATION IS EXPECTED FROM GEORGIA TO
EASTERN TEXAS. FOR MORE INFORMATION ON THE THREAT OF FLOODING IN
YOUR AREA...PLEASE REFER TO THE LOCAL NWS FIELD OFFICE.
THE LONGWAVE PATTERN WILL BECOME PROGRESSIVELY MORE AMPLIFIED THIS
FORECAST PERIOD. CURRENTLY...THERE IS A CLOSED LOW OVER ONTARIO
THAT IS PROGGED TO MOVE NORTHEASTWARD DEEPER INTO CANADA. A
FRONTAL BOUNDARY FROM THIS PARENT LOW WILL PUSH ACROSS THE EASTERN
GREAT LAKES AND INTO THE NORTHEAST...PROVIDING EFFICIENT LIFT AND
SUSTAINING PRE-FRONTAL CONVECTION ON SUNDAY AND MONDAY. THE
SOUTHERN PORTION OF THE BOUNDARY WILL BECOME MORE ACTIVE AS
MOISTURE FROM FAY GETS ENTRAINED INTO THE TENNESSEE VALLEY.
HEADING WEST... ANOTHER VIGOROUS CYCLONE THAT IS CURRENTLY JUST
OFFSHORE OF WESTERN BRITISH COLUMBIA WILL BEGIN TO IMPACT THE
PACIFIC NORTHWEST ON SUNDAY. WHILE THE LION'S SHARE OF THE
DYNAMICS AND MOISTURE PLUME WILL REMAIN NORTH OF THE U.S/CANADIAN
BORDER...A SERIES OF SHORTWAVES WILL GET KICKED OUT INTO
WASHINGTON AND OREGON...WHICH WILL RESULT IN A BATCH OF UNSETTLED
WEATHER SUNDAY AFTERNOON. VERY LITTLE MOISTURE WILL MAKE IT PAST
THE MOUNTAINS. THERE IS A POSSIBILITY OF THIS SYSTEM SPARKING SOME
ISOLATED THUNDERSTORMS. ELSEWHERE...WITH MONSOON MOISTURE IN PLACE
OVER THE FOUR CORNERS REGION...EXPECT CONVECTION TO PERCOLATE OVER
THE HIGHER TERRAIN AS THE DAYTIME TEMPERATURES SOAR ON BOTH SUNDAY
AND MONDAY AFTERNOONS. LAST BUT NOT LEAST...ORGANIZED CONVECTION
OVER THE CENTRAL PLAINS MAY PRODUCE DAMAGING WINDS AND LARGE HAIL
OVER PORTIONS OF KANSAS.
SZATANEK
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