Prognostic Meteorological Discussion
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000
FXUS01 KWBC 270748
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
347 AM EDT TUE SEP 27 2016

VALID 12Z TUE SEP 27 2016 - 12Z THU SEP 29 2016

...COLD FRONT APPROACHING THE EAST COAST WITH NUMEROUS SHOWERS AND
STORMS EXPECTED...

...COOL AND DRY FOR MUCH OF THE CENTRAL PLAINS AND ROCKIES...

THE MAIN WEATHER MAKER ACROSS THE CONTINENTAL U.S. OVER THE NEXT
COUPLE OF DAYS WILL BE A LARGE UPPER LEVEL LOW THAT IS FORECAST TO
TRACK ACROSS THE NORTHERN GREAT LAKES AND OHIO VALLEY BY THE
MIDDLE OF THE WEEK.  THERE WILL BE A SURFACE LOW IN ASSOCIATION
WITH THAT AS WELL, AND UNSETTLED WEATHER CONDITIONS ARE LIKELY
WITH SCATTERED TO NUMEROUS SHOWERS DEVELOPING IN THE VICINITY OF
IT.  AS THE UPPER LOW SLOWLY APPROACHES THE CENTRAL APPALACHIAN
MOUNTAINS, IT WILL BE ABLE TO TAP INTO ENOUGH MOISTURE FROM THE
ATLANTIC OCEAN TO GENERATE AN ORGANIZED AREA OF MODERATE TO HEAVY
RAINFALL BY THURSDAY OVER PARTS OF THE MID-ATLANTIC AND
APPALACHIAN MOUNTAINS.

ELSEWHERE, EXPECT COOL AND MOSTLY DRY CONDITIONS ACROSS MUCH OF
THE CENTRAL U.S. AND EXTENDING WESTWARD TOWARDS THE ROCKY
MOUNTAINS COURTESY OF THE LARGE SURFACE HIGH IN PLACE.  A FEW
SHOWERS WILL BE POSSIBLE ON TUESDAY OVER THE PACIFIC NORTHWEST
WITH THE PASSAGE OF A COLD FRONT OVER WASHINGTON AND OREGON.
SHOWERS WILL ALSO BE POSSIBLE OVER MOUNTAINOUS AREAS OF ARIZONA
AND NEW MEXICO WITH SOME MONSOONAL MOISTURE IN PLACE.

D. HAMRICK


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