Prognostic Meteorological Discussion
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000
FXUS01 KWBC 242006
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
405 PM EDT SUN MAY 24 2015

VALID 00Z MON MAY 25 2015 - 00Z WED MAY 27 2015

...SEVERE THUNDERSTORMS AND FLASH FLOODING POSSIBLE FROM PORTIONS
OF THE CENTRAL AND SOUTHERN PLAINS TO THE MISSISSIPPI VALLEY...

...ABOVE AVERAGE TEMPERATURES EXPECTED FOR MEMORIAL DAY FROM THE
GREAT LAKES TO THE MID-ATLANTIC AND NORTHEAST...

RATHER STORMY CONDITIONS WILL CONTINUE FOR MUCH OF THE CENTRAL
U.S. OVER THE NEXT COUPLE DAYS AS THE LARGE-SCALE WEATHER PATTEN
WILL REMAIN RELATIVELY UNCHANGED. A DEEP UPPER-LEVEL TROUGH OVER
THE INTERMOUNTAIN WEST WILL MOVE SLOWLY EASTWARD INTO THE PLAINS
ON MONDAY. NUMEROUS UPPER-LEVEL DISTURBANCES TRAVERSING THE
EASTERN SIDE OF THIS TROUGH, ALONG WITH A NEARLY STATIONARY
SURFACE FRONTAL BOUNDARY, WILL KEEP SCATTERED TO WIDESPREAD
SHOWERS AND THUNDERSTORMS IN PLACE ACROSS MUCH OF THE CENTRAL U.S.
THROUGH MONDAY. BY TUESDAY A STRONGER UPPER-LEVEL DISTURBANCE WILL
MOVE INTO THE PLAINS AND WILL BEGIN TO SHIFT THE FOCUS FOR SHOWERS
AND THUNDERSTORMS EASTWARD TOWARD THE OHIO AND TENNESSEE VALLEYS.
FLASH FLOODING IS POSSIBLE THROUGH MONDAY ACROSS PORTIONS OF THE
CENTRAL/SOUTHERN PLAINS AND MISSISSIPPI VALLEY, AS HEAVY RAIN MAY
FALL ON ALREADY SATURATED GROUND. THE STORM PREDICTION CENTER IS
ALSO FORECASTING A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE
SAME AREAS.

ELSEWHERE, SHOWERS AND THUNDERSTORMS WILL ALSO SPREAD EASTWARD
ACROSS THE GREAT LAKES TONIGHT, WITH RAIN POSSIBLE IN THE
NORTHEAST ON MONDAY AS A WARM FRONT LIFTS NORTHWARD ACROSS THE
REGIONS. ACROSS THE WEST, SCATTERED AFTERNOON AND EVENING SHOWERS
AND THUNDERSTORMS WILL REMAIN COMMON UNDER THE INFLUENCE OF THE
UPPER-LEVEL TROUGH.

HIGH PRESSURE AT THE UPPER-LEVELS WILL EXPAND ALONG THE EASTERN
SEABOARD, WITH TEMPERATURES RISING IN EARNEST. AFTERNOON HIGH
TEMPERATURES ON MEMORIAL DAY ARE FORECAST TO BE 5 TO 15 DEGREES
ABOVE AVERAGE FROMM THE GREAT LAKES EASTWARD TO THE NORTHEAST AND
THE MID-ATLANTIC.


RYAN


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