Prognostic Meteorological Discussion
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FXUS01 KWBC 300629
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
228 AM EDT SAT AUG 30 2014

VALID 12Z SAT AUG 30 2014 - 12Z MON SEP 01 2014

...CENTRAL AND NORTHERN PLAINS AND UPPER MISSISSIPPI VALLEY COULD
SEE A THREAT OF SEVERE WEATHER ON SUNDAY...

...A LARGE AREA OF SHOWERS AND THUNDERSHOWERS WILL AFFECT THE GULF
COAST AND LOWER MISSISSIPPI VALLEY ON SATURDAY AND SPREAD EASTWARD
ON SUNDAY...

...WARMER AND MORE HUMID CONDITIONS WILL SPREAD EASTWARD ACROSS
MUCH OF THE EAST WHILE COOLER TEMPERATURES COVER MUCH OF THE WEST
ON SUNDAY AND MONDAY, EXCEPT FOR HOT AND DRY FOR THE SOUTHWEST...

A COLD FRONT WILL SWING EASTWARD FROM THE NORTHWESTERN STATES ON
SATURDAY AND REACH THE NORTHERN PLAINS ON SUNDAY.  SOUTHERLY WINDS
AHEAD OF THE FRONT WILL BRING HEAT AND MOISTURE NORTHWARD AND
COULD HELP SET UP THE POTENTIAL FOR SEVERE THUNDERSTORMS, HAIL AND
A FEW TORNADOES LATER ON SUNDAY FROM KANSAS AND NEBRASKA INTO IOWA
AND MINNESOTA.

A WEAK UPPER TROUGH OVER THE SOUTHERN PLAINS WITH FLOW OFF THE
GULF OF MEXICO WILL COMBINE TO PRODUCE AN AREA OF HEAVY SHOWERS
AND THUNDERSHOWERS FROM EASTERN TEXAS AND LOUISIANA ACROSS THE
LOWER MISSISSIPPI VALLEY INTO PART OF THE SOUTHEAST ON SATURDAY.
ANOTHER AREA OF RAINFALL NOW ACROSS THE UPPER MISSISSIPPI VALLEY
WILL SPREAD EASTWARD ACROSS THE MIDWEST AS WELL.  A GENERAL
INCREASE OF MOISTURE WILL OCCUR ALONG THE MISSISSIPPI VALLEY ON
SATURDAY AND SPREAD EASTWARD ON SUNDAY WITH SHOWERS AND
THUNDERSHOWERS FROM THE TENNESSEE AND OHIO VALLEYS TOWARD THE
APPALACHIANS INTO THE WESTERN PORTIONS OF THE MIDDLE ATLANTIC
STATES AND NORTHEAST.

AS HIGH PRESSURE MOVES EASTWARD OFF THE NORTHEAST COAST, WARMER
AND MORE HUMID CONDITIONS WILL RETURN ACROSS MUCH OF THE EAST
COAST AND  WILL CONTINUE THROUGH LABOR DAY WITH SCATTERED
THUNDERSHOWERS AND TEMPERATURES NEAR 90 DEGREES.  MEANWHILE,
COOLER CONDITIONS WILL COVER MUCH OF THE NORTHWEST AND NORTHERN
ROCKIES AND THEN MOVE EASTWARD TOWARD THE MIDWEST BY MONDAY.  HOT
AND DRY CONDITIONS WILL REMAIN OVER THE DESERT SOUTHWEST WHERE
TEMPERATURES WILL EXCEED 100 DEGREES.

KOCIN

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





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