Prognostic Meteorological Discussion
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FXUS01 KWBC 232047
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
447 PM EDT WED APR 23 2014

VALID 00Z THU APR 24 2014 - 00Z SAT APR 26 2014

...SEVERE WEATHER WILL THREATEN PORTIONS OF THE NATION`S
MIDSECTION...

...WEATHER WILL REMAIN UNSETTLED OVER THE NORTHWESTERN U.S....

A COLD FRONT PUSHING EAST OF THE ROCKIES WILL HELP IGNITE SHOWERS
AND THUNDERSTORMS WHILE THE BOUNDARY CROSSES THE NATION`S
MIDSECTION WEDNESDAY NIGHT INTO THURSDAY.  AN ABUNDANCE OF
MOISTURE FUNNELING NORTHWARD OUT OF THE GULF OF MEXICO WILL FUEL
MODERATE TO HEAVY RAINS WITHIN DEVELOPING STORMS...AND AMPLE
INSTABILITY WILL ALLOW FOR STORMS TO BECOME STRONG OR EVEN SEVERE.
 THE GREATEST CHANCE FOR SEVERE WEATHER WEDNESDAY NIGHT WILL BE
ACROSS THE CENTRAL TO SOUTHERN PLAINS...AND THEN THE THREAT SHOULD
SHIFT EAST INTO LOWER MISSISSIPPI VALLEY ON THURSDAY.  SHOWER AND
THUNDERSTORM ACTIVITY SHOULD SPREAD INTO THE EASTERN THIRD OF THE
COUNTRY FRIDAY MORNING AS THE FRONT CROSSES THE OHIO AND TENNESSEE
VALLEYS...BUT THE SEVERE WEATHER THREAT SHOULD DIMINISH.
ALSO...GULF MOISTURE SURGING FAR ENOUGH NORTH SHOULD HELP DEVELOP
RAINS WITH EMBEDDED THUNDERSTORMS AHEAD OF THE NORTHERN PORTION OF
THE BOUNDARY ARCHING OUT OVER THE DAKOTAS...UPPER MISSISSIPPI
VALLEY...AND GREAT LAKES.  SNOW WILL BE POSSIBLE WITHIN THE
NORTHERN FRINGE OF THE PRECIPITATION SHIELD...WHICH COULD LEAD TO
SOME LATE SEASON ACCUMULATIONS ACROSS NORTHERN
MINNESOTA...WISCONSIN...AND THE UPPER PENINSULA OF MICHIGAN.

JUST AS WEATHER QUIETS DOWN OUT WEST...ANOTHER PACIFIC FRONT
MOVING INLAND WILL KEEP CONDITIONS UNSETTLED THROUGH THE END OF
THE WORK WEEK.  WIDESPREAD SHOWER ACTIVITY WILL EXPAND ACROSS THE
REGION AS THE FRONT PUSHES THROUGH THE PACIFIC NORTHWEST ON
THURSDAY AND THEN DROPS INTO THE NORTHERN ROCKIES...GREAT
BASIN...AND CENTRAL CALIFORNIA ON FRIDAY.  THE COMBINATION OF
ONSHORE FLOW FROM THE PACIFIC AND OROGRAPHIC EFFECTS WILL ALLOW
FOR SOME HEFTY TOTALS ALONG THE UPSLOPE SIDE OF THE
TERRAIN...ESPECIALLY ACROSS THE COASTAL RANGES OF WASHINGTON AND
OREGON...THE CASCADES...AND THE SIERRA NEVADA.  IN
ADDITION...BELOW NORMAL TEMPERATURES ACROSS THE AREA WILL MAKE
SNOW THE DOMINANT PRECIPITATION TYPE IN THE HIGHER ELEVATIONS.



GERHARDT


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