Prognostic Meteorological Discussion
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FXUS01 KWBC 060740
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
339 AM EDT WED MAY 06 2015

VALID 12Z WED MAY 06 2015 - 12Z FRI MAY 08 2015

...SEVERE THUNDERSTORMS POSSIBLE ACROSS PORTIONS OF THE SOUTHERN
AND CENTRAL PLAINS...

...FLASH FLOODING POSSIBLE ACROSS PORTIONS OF THE CENTRAL U.S...

THE WEATHER PATTERN WILL REMAIN ACTIVE ACROSS THE CONTIGUOUS U.S.
THROUGH THE SHORT RANGE FORECAST PERIOD. AN UPPER-LEVEL
DISTURBANCE WILL MOVE FROM COLORADO THIS MORNING NORTHEASTWARD
INTO THE NORTHERN PLAINS BY THIS EVENING. AT THE SAME TIME, A COLD
FRONT WILL CROSS THE NORTHERN INTERMOUNTAIN STATES THIS MORNING
BEFORE MOVING INTO THE NORTHERN PLAINS BY THIS EVENING. MOIST AND
UNSTABLE AIR WILL CONTINUE TO STREAM NORTHWARD ACROSS THE CENTRAL
U.S. AIDED BY THE UPPER-LEVEL DISTURBANCE AND A DRY LINE AT THE
SURFACE, SHOWERS AND THUNDERSTORMS WILL ONCE AGAIN BE WIDESPREAD
TODAY ACROSS THE CENTRAL U.S., FROM THE SOUTHERN PLAINS NORTHWARD
TO THE CANADIAN BORDER. THIS GENERAL WEATHER PATTERN WILL CONTINUE
INTO THURSDAY, ALBEIT SHIFTED SOMEWHAT EASTWARD, WITH SHOWERS AND
THUNDERSTORMS ONCE AGAIN FROM THE SOUTHERN PLAINS NORTHWARD TO THE
MIDWEST. THE STORM PREDICTION CENTER IS FORECASTING A SLIGHT RISK
OF SEVERE THUNDERSTORMS TODAY ACROSS PORTIONS OF THE SOUTHERN AND
CENTRAL PLAINS. PLEASE REFER TO PRODUCTS ISSUED BY SPC FOR FURTHER
DETAILS ON THE SEVERE WEATHER THREAT. IN ADDITION TO THE SEVERE
WEATHER, HEAVY RAIN AND FLASH FLOODING WILL BE A POSSIBILITY
ACROSS MUCH OF THE CENTRAL U.S.

SHOWERS AND THUNDERSTORMS WILL ALSO BE COMMON ACROSS THE ROCKIES
AND INTERMOUNTAIN WEST TODAY AS A WEST TO EAST ORIENTED FRONTAL
BOUNDARY REMAINS IN PLACE ACROSS THE REGION. BY WEDNESDAY NIGHT
INTO THURSDAY, COLDER AIR WILL WORK ITS WAY INTO THE INTERMOUNTAIN
WEST, AND SNOW LEVELS WILL LOWER SOMEWHAT ACROSS THE NORTHERN
INTERMOUNTAIN STATES -- NONETHELESS, SNOW WILL REMAIN CONFINED TO
THE HIGHER TERRAIN.

FARTHER EAST, A FRONTAL BOUNDARY DRAPED FROM THE OHIO VALLEY TO
THE MID-ATLANTIC STATES WILL ONCE AGAIN SERVE AS A FOCUS FOR
SHOWER AND THUNDERSTORM POTENTIAL TODAY. THIS FRONT WILL DISSIPATE
BY THURSDAY, AND THE POTENTIAL FOR SHOWERS AND THUNDERSTORMS
ACROSS THESE AREAS WILL DECREASE AS WELL.

AN AREA OF LOW PRESSURE OFF THE COAST OF FLORIDA TODAY WILL DRIFT
SLOWLY NORTHWARD TOWARD THE CAROLINAS OVER THE NEXT COUPLE DAYS.
THIS SYSTEM WILL BRING THE POSSIBILITY OF SHOWERS AND
THUNDERSTORMS TO THE FLORIDA PENINSULA TODAY AND TO COASTAL
PORTIONS OF THE CAROLINAS ON THURSDAY.


RYAN


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV
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