137
FXUS01 KWBC 031938
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
337 PM EDT THU MAY 03 2012
VALID 00Z FRI MAY 04 2012 - 00Z SUN MAY 06 2012
...A LARGE UPPER RIDGE COVERS THE SOUTHEAST UNITED STATES BRINGING
WARM WEATHER TO MUCH OF THE SOUTH AND SOUTHEAST WHILE A
SIGNIFICANT COLD FRONT ADVANCES EASTWARD ACROSS THE
NORTHWEST...BRINGING CHILLY SPRING WEATHER AS WELL AS MOUNTAIN
SNOWS...
...COOL HIGH PRESSURE OVER CENTRAL CANADA WILL BRING RELATIVELY
COOL WEATHER TO THE NORTHERN PLAINS ACROSS THE NORTHERN MIDWEST
AND LATER TO THE NORTHEAST BY THE WEEKEND...
...SEVERAL FRONTAL BOUNDARIES ACROSS THE NORTHERN THIRD OF THE
UNITED STATES SEPARATING THE COOLER AIR ACROSS THE NORTHERN STATES
FROM WARMER AIR TO THE SOUTH WILL BE ASSOCIATED WITH A FAIRLY
WIDESPREAD AREA OF SCATTERED SHOWERS AND THUNDERSHOWERS...
COOLER AIR WILL ADVANCE EASTWARD ACROSS THE NORTHWEST WITH SNOW
LEVELS LOWERING ACROSS THE CASCADES AND THE BITTERROOTS WITH
WIDESPREAD LOWER ELEVATION RAIN SHOWERS.
WHILE A LARGE RIDGE COVERS THE SOUTHEAST UNITED STATES FOR MUCH OF
THE FORECAST PERIOD...WEAK UPPER DISTURBANCES AND FLOW OFF THE
GULF OF MEXICO WILL GIVE RISE TO SCATTERED SHOWERS AND
THUNDERSTORMS NEAR AND ALONG THE GULF COAST STATES FROM LOUISIANA
EASTWARD TO NORTHERN FLORIDA.
SHOWERS AND THUNDERSTORMS WILL ALSO BE FOCUSED ALONG SEVERAL
BOUNDARIES FROM THE CENTRAL PLAINS TO THE LOWER MIDWEST AND OHIO
VALLEY...WHERE SOME OF THE SHOWERS AND THUNDERSTORMS COULD BE
HEAVY. THESE SHOWERS WILL THEN SPILL EASTWARD TOWARD THE
NORTHEAST AND NEW ENGLAND ON FRIDAY INTO EARLY SATURDAY.
COOL OCEANIC AIR OVER THE MIDDLE ATLANTIC STATES ON THURSDAY WILL
GIVE WAY TO WARMER TEMPERATURES ON FRIDAY...BEFORE COOLER AIR
AGAIN GRADUALLY ADVANCES SOUTHWARD OVER THE NORTHEAST AND MIDDLE
ATLANTIC STATES OVER THE WEEKEND.
KOCIN
GRAPHICS AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page