Prognostic Meteorological Discussion
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FXUS01 KWBC 260733
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
333 AM EDT MON SEP 26 2016

VALID 12Z MON SEP 26 2016 - 12Z WED SEP 28 2016

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

...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 AN ELONGATED FRONTAL BOUNDARY CROSSING THE
EASTERN THIRD OF THE NATION AND EXTENDING DOWN TOWARDS THE GULF
COAST.  A RETURN TO SLIGHTLY MORE HUMID CONDITIONS CAN BE EXPECTED
ACROSS THE MID-ATLANTIC AND NORTHEAST BY MONDAY NIGHT AHEAD OF THE
FRONT, WITH A BAND OF SHOWERS AND A FEW STORMS DEVELOPING AHEAD OF
IT.

OF EVEN GREATER INTEREST 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 MAY BE ABLE TO TAP INTO ENOUGH MOISTURE
FROM THE ATLANTIC OCEAN TO GENERATE AN ORGANIZED AREA OF MODERATE
TO LOCALLY HEAVY RAINFALL BY THE END OF THE FORECAST PERIOD OVER
PARTS OF THE EAST COAST.

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 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.

D. HAMRICK

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