125
FXUS01 KWBC 050743
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
343 AM EDT MON OCT 05 2009
VALID 12Z MON OCT 05 2009 - 00Z WED OCT 07 2009
THE BIG STORY ACROSS THE LOWER 48 CONTINUES TO BE AN ONGOING EARLY
AUTUMN STORM ACROSS THE CENTER OF THE COUNTRY. THE LARGE UPPER
LEVEL LOW OVER THE INTERMOUNTAIN REGION IS FORECAST TO SEPARATE
INTO TWO PIECES WITH ONE PIECE LAGGING BEHIND ACROSS CALIFORNIA BY
MID WEEK AND THE OTHER EJECTING OUT INTO THE PLAINS TOWARD THE
EAST NORTHEAST. AS THE LATTER OCCURS... AN OCCLUDED FRONTAL SYSTEM
WILL STRENGTHEN OVER THE CENTRAL PLAINS... DRAGGING AN AREA OF
SNOW ON THE WEST SIDE THROUGH THE NORTHERN ROCKIES AND INTO THE
HIGH NORTHERN PLAINS. SNOWFALL SHOULD END EARLY TUESDAY MORNING
WHILE AT THE SAME TIME... MOISTURE TRANSPORT NORTHWARD THROUGH THE
PLAINS ALLOWS FOR WIDESPREAD RAIN FROM THE NORTH CENTRAL U.S.
EVENTUALLY INTO THE GREAT LAKES. MUCH OF THE CENTRAL AND WESTERN
U.S. WILL REMAIN BELOW AVERAGE WITH RESPECT TO TEMPERATURE WITH
WARMING EXPECTED ACROSS SOUTH TEXAS AS A WARM FRONT LIFTS NORTH
TODAY AND TUESDAY.
LOOKING SOUTH AND EAST... A LARGE SWATH OF LIGHT AND MODERATE RAIN
ONGOING ACROSS THE SOUTHEAST THIS MORNING WILL CONTINUE TO MOVE
EAST DURING THE DAY TODAY AHEAD OF A WAVE ON THE FRONT LOCATED
ALONG THE GULF COAST. THIS REGION OF THE U.S. CONTAINS A RATHER
HIGH MOISTURE CONTENT AND THOUGH THE PRECIPITATION IS MOVING ALONG
IN BRISK WESTERLY FLOW... UP TO AN INCH OF ADDITIONAL RAIN IS
POSSIBLE FOR MANY LOCATIONS IN THE SOUTHEAST... ESPECIALLY ALONG
THE COASTS. CENTRAL AND SOUTHERN FLORIDA SHOULD MISS THE BULK OF
THESE RAINS HOWEVER DIURNAL CONVECTION IS STILL LIKELY TO PROVIDE
RAIN FOR MOST THROUGH TOMORROW EVENING. THE MID ATLANTIC AND
NORTHEAST SHOULD SEE ANOTHER NICE TODAY TODAY AND TUESDAY WITH
CLOSE TO AVERAGE TEMPERATURES UNDER THE INFLUENCE OF HIGH
PRESSURE.
OTTO
GRAPHICS AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page