Prognostic Meteorological Discussion
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000
FXUS01 KWBC 262020
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
419 PM EDT WED AUG 26 2015

VALID 00Z THU AUG 27 2015 - 00Z SAT AUG 29 2015

...SHOWERS AND THUNDERSTORMS EXPECTED THROUGH THURSDAY AFTERNOON
ACROSS PORTIONS OF THE ROCKIES AND SOUTHWESTERN U.S...

...LOW PRESSURE SYSTEM TO BRING NUMEROUS SHOWERS AND THUNDERSTORMS
TO PORTIONS OF THE CENTRAL AND NORTHERN PLAINS THURSDAY AND
FRIDAY...

A LOW PRESSURE SYSTEM, CURRENTLY OVER THE INTERMOUNTAIN WEST, WILL
ALLOW A COOLER AIRMASS TO SPILL ALONG THE ROCKIES INTO THE CENTRAL
AND SOUTHERN PLAINS BY FRIDAY EVENING. A WARM FRONT WILL BEGIN TO
DEVELOP THURSDAY EVENING OVER THE CENTRAL PLAINS AND WILL LIFT
INTO THE MIDWEST THROUGH FRIDAY. WITH UPPER-LEVEL SUPPORT AND
SUFFICIENT MOISTURE AVAILABILITY IN THE LOWER LEVELS OF THE
ATMOSPHERE, WIDESPREAD CONVECTION IS EXPECTED THROUGH FRIDAY
EVENING SPANNING FROM THE DESERT SOUTHWEST TO THE NORTHERN PLAINS.
NUMEROUS SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER THE KANSAS TO
SOUTHWEST MINNESOTA CORRIDOR. SOME OF THESE STORMS MAY PRODUCE
HEAVY RAINFALL.

A SLOW-MOVING FRONTAL BOUNDARY HAS PUSHES OFFSHORE TODAY; HOWEVER
SOUTHERN PORTIONS OF THE BOUNDARY HAVE STALLED OVER THE COASTAL
AREAS OF THE CAROLINAS, GEORGIA AND FLORIDA. SCATTERED TO NUMEROUS
SHOWERS AND THUNDERSTORMS WILL PERSIST THROUGH THURSDAY IN THESE
AREAS. THE NEARLY STATIONARY BOUNDARY MAY PUSH RETREAT INLAND
LATER THIS WEEK AS TROPICAL STORM ERIKA ADVANCES TOWARD FLORIDA.
THE EXACT TRACK OF T.S. ERIKA REMAINS UNCERTAIN AT THIS TIME.

BELOW AVERAGE TEMPERATURES WILL CONTINUE FOR MUCH OF THE EASTERN
HALF OF THE COUNTRY THROUGH THURSDAY -- WITH AFTERNOON HIGH
TEMPERATURES FORECAST TO BE 5 TO 15 DEGREES BELOW AVERAGE.

CAMPBELL


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




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