Prognostic Meteorological Discussion
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000
FXUS01 KWBC 241832
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
231 PM EDT MON APR 24 2017

VALID 00Z TUE APR 25 2017 - 00Z THU APR 27 2017

...HEAVY RAIN ACROSS THE EASTERN U.S. AND STORMS ACROSS THE
CENTRAL U.S. THROUGH MIDWEEK...

A COMPLEX LOW PRESSURE SYSTEM SITUATED NEAR THE SOUTHEAST COAST
WILL CAUSE WIDESPREAD HEAVY RAIN ACROSS THE CAROLINAS AND INTO
VIRGINIA THROUGH EARLY TUESDAY.  ANOTHER LOW TRACKING NORTHWARD
FROM THE BAHAMAS WILL MERGE WITH THIS SYSTEM, SUPPLYING ADDITIONAL
MOISTURE AND THUS HEAVIER RAINFALL.  THIS SURFACE LOW AND ITS
ACCOMPANYING UPPER LOW IS FORECAST TO WEAKEN SOME AS IT HEADS TO
THE NORTHEAST U.S. BY MIDWEEK, BUT STILL WILL BE CAPABLE OF
PRODUCING AREAS OF HEAVY RAIN FROM THE MID-ATLANTIC TO NEW
ENGLAND.  FLASH FLOODING WILL BE POSSIBLE WHERE TRAINING
CONVECTION OCCURS, ESPECIALLY OVER EASTERN NORTH CAROLINA GOING
THROUGH EARLY TUESDAY.

ACROSS THE CENTRAL U.S., A WELL-DEFINED FRONTAL ZONE IS EXPECTED
TO BECOME ESTABLISHED FROM THE UPPER MIDWEST TO TEXAS.  TWO
SURFACE LOWS ARE EXPECTED ALONG THIS BOUNDARY, WITH ONE OVER THE
UPPER MIDWEST, AND THE OTHER OVER THE SOUTHERN PLAINS.  MULTIPLE
ROUNDS OF SEVERE WEATHER ARE POSSIBLE NEAR THE FRONT AND AHEAD OF
THE DRYLINE OVER WESTERN TEXAS.

WINTER WEATHER IS STILL UPON US FOR THE HIGHER ELEVATIONS OF THE
NORTHWESTERN U.S. THROUGH WEDNESDAY, INCLUDING THE CASCADES AND
THE NORTHERN/CENTRAL ROCKIES.  A PACIFIC FRONT MOVING ONSHORE
TUESDAY NIGHT WILL LIKELY PRODUCE AN ENHANCED BAND OF
PRECIPITATION WITH IT ACROSS THE PACIFIC NORTHWEST.  TEMPERATURES
WILL CONTINUE TO BE BELOW NORMAL ACROSS THE NORTH-CENTRAL PART OF
THE NATION.

HAMRICK


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_WBG.PHP

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