610
FXUS01 KWBC 050837
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
437 AM EDT SUN OCT 05 2008
VALID 12Z SUN OCT 05 2008 - 00Z TUE OCT 07 2008
A DEEP UPPER LEVEL TROUGH WILL CONTINUE TO MOVE ACROSS THE WESTERN
U.S. THIS WEEKEND INTO THE PLAINS BY MONDAY EVENING. AS THIS
OCCURS... PRECIPITATION WILL SLOWLY COME TO AN END OVER THE
INTERMOUNTAIN WEST AS THE FOCUS SHIFTS TOWARD THE PLAINS. AHEAD OF
THE UPPER TROUGH... A LONG FETCH OF MODERATE... LOW LEVEL
SOUTHERLY FLOW WILL SET UP FROM THE GULF OF MEXICO... ALL THE WAY
INTO CANADA... STEERING ADDITIONAL MOISTURE INTO THE PLAINS
REGION. STRONG FORCING AHEAD OF THE UPPER TROUGH ALONG WITH ENERGY
ROTATING AROUND THE UPPER CYCLONE WILL DEVELOP WIDESPREAD SHOWERS
AND THUNDERSTORMS TODAY BEGINNING OVER THE WESTERN PORTIONS OF
TEXAS AND OKLAHOMA... MOVING EAST TOWARD THE MIDWEST FOR MONDAY.
AS THIS OCCURS... PRECIPITATION WILL ALSO CONTINUE TO EXPAND
NORTHWARD THROUGH THE PLAINS... LEADING TO WIDESPREAD RAINFALL
TOTALS OVER 1 INCH THROUGHOUT MUCH OF THE PLAINS BY TUESDAY...
ALONG WITH ADDITIONAL HEAVIER RAINFALL TOTALS BENEATH
CONVECTION... ESPECIALLY OVER NORTH TEXAS AND OKLAHOMA. MUCH
COOLER AIR WILL MOVE INTO THE PLAINS AS AN ASSOCIATED COLD FRONT
EDGES EAST TODAY AND MONDAY... REPLACING THE 80S AND 90S OBSERVED
ON SATURDAY WITH 60S AND 70S FOR TODAY AND MONDAY.
RESIDUAL... MOIST... ONSHORE FLOW WILL CONTINUE TO KEEP THE
PACIFIC NORTHWEST CLOUDY AND WET INTO THE EARLY PART OF THIS WEEK.
IN ADDITION... A RATHER STRONG PACIFIC CYCLONE IS FORECAST TO MAKE
LANDFALL ALONG THE SOUTHERN COAST OF BRITISH COLUMBIA MONDAY
NIGHT... BRINGING ANOTHER ROUND OF COASTAL RAIN AND HIGHER
ELEVATION SNOW.
OVER FLORIDA... A QUASI-STATIONARY FRONTAL BOUNDARY WILL KEEP
SHOWERS AND THUNDERSTORMS IN THE FORECAST FOR THE PENINSULA
THROUGH MONDAY WITH TEMPERATURES CLOSE TO AVERAGE.
FARTHER NORTH... A STRONG RIDGE OF HIGH PRESSURE WILL DOMINATE
SOUTHEASTERN CANADA WHICH WILL KEEP MOST OF THE NORTHEAST AND MID
ATLANTIC REGION COOL AND DRY. HOWEVER... A WEAK AREA OF LOW
PRESSURE ON A FRONT OVER MARYLAND WILL SLOWLY SLIDE EAST TODAY AND
MONDAY WHICH WILL BRING A LITTLE BIT OF RAIN TO LONG ISLAND AND
SOUTHERN NEW ENGLAND. LATE MONDAY INTO TUESDAY... AN UPPER LEVEL
TROUGH IS EXPECTED TO INVIGORATE THE SURFACE LOW OVER THE
ATLANTIC... WHICH SHOULD DROP THE COLD FRONT SOUTHWARD... SENDING
A SURGE OF COLDER AIR DOWN THE EAST COAST FOR TUESDAY.
OTTO
GRAPHICS AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page