733
FXUS01 KWBC 272054
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
454 PM EDT SUN SEP 27 2009
VALID 00Z MON SEP 28 2009 - 12Z TUE SEP 29 2009
A VERY AMPLIFIED PATTERN WILL BE GIVING MANY ACROSS THE LOWER 48 A
TASTE OF MID FALL FOR THE START OF THE WEEK. AN AREA OF LOW
PRESSURE CURRENTLY IN NORTHERN NEW JERSEY WILL TRACK NORTHEASTWARD
TONIGHT... TAKING LINGERING RAINFALL ACROSS THE NORTHEAST WITH IT.
THE ASSOCIATED COLD FRONT COINCIDES WITH DRIER AIR BEHIND IT...
HOWEVER TEMPERATURES WILL ACTUALLY BE WARMER ON MONDAY BEHIND THE
FRONT FOR AREAS THAT EXPERIENCED A LOT OF CLOUDS AND RAIN TODAY.
THE BIG COLD PUSH IS WITH A COLD FRONT RAPIDLY SURGING THROUGH THE
PLAINS THIS AFTERNOON. STRONG DYNAMICS ALOFT WILL ALLOW THIS FRONT
TO SWEEP ALL THE WAY INTO THE NORTHERN GULF OF MEXICO AND FLORIDA
BY TUESDAY MORNING WITH GUSTY NORTHWEST WINDS BEHIND THE FRONT...
STRONGEST FOR LOCATIONS WITHIN A FEW HUNDRED MILES ON THE WEST
SIDE OF THE SURFACE LOW. SINCE THE FIRST COLD FRONT... ACROSS THE
EAST THIS AFTERNOON... WILL HAVE SWEPT OUT THE MAJORITY OF THE
AVAILABLE PRECIPITATION OFFSHORE... THE ONLY NOTEWORTHY
PRECIPITATION TOTALS WILL BE ACROSS THE GREAT LAKES REGION. THE
WARM LAKES WILL ONLY HELP TO FOSTER INSTABILITY BENEATH THE COLD
UPPER LOW WHICH WILL BE DEEPENING AS IT MOVES ACROSS THE GREAT
LAKES TOMORROW INTO TUESDAY. BELOW AVERAGE TEMPERATURES ARE
EXPECTED FOR JUST ABOUT THE ENTIRE EASTERN HALF OF THE U.S. BY
TUESDAY.
ABOVE AVERAGE TEMPERATURES ACROSS MOST OF THE WEST WILL BE COMING
TO AN END AND EDGING EASTWARD THIS WEEK AS AN UPPER LEVEL TROUGH
STRENGTHENS AND MOVES ONSHORE TUESDAY. THE ASSOCIATED... AND
RATHER STRONG COLD FRONT WILL REACH THE PACIFIC NORTHWEST COAST
TOMORROW WITH MUCH COLDER AIR MOVING INTO INTERIOR PORTIONS OF THE
WEST TOMORROW NIGHT INTO TUESDAY. ONSHORE FLOWN WILL PROMOTE
UPSLOPE ENHANCED PRECIPITATION BEHIND THE FRONT WITH SNOW LEVELS
DROPPING TO ROUGHLY 4500 FT FOR THE WASHINGTON CASCADES TUESDAY
MORNING. LIMITED AVAILABILITY OF MOISTURE SHOULD KEEP RAINFALL
TOTALS ON THE LOW END FOR THE NORTHWEST. THE ABOVE AVERAGE WARMTH
AHEAD OF THE SYSTEM IS EXPECTED TO REACH THE ROCKIES ON TUESDAY.
OTTO
GRAPHICS AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page