Prognostic Meteorological Discussion
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FXUS01 KWBC 291943
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
342 PM EDT THU SEP 29 2016

VALID 00Z FRI SEP 30 2016 - 00Z SUN OCT 02 2016

...HEAVY RAIN THREAT CONTINUES THROUGH SATURDAY FROM THE OHIO
VALLEY TO THE MID-ATLANTIC AND THE NORTHEAST...

...SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE OVER THE
SOUTHWEST AND ROCKIES...


A LARGE UPPER LEVEL LOW SPINNING OVER THE OHIO VALLEY KEEPS
WIDESPREAD SHOWERS AND THUNDERSTORMS IN THE FORECAST THE NEXT
COUPLE OF DAYS FROM THE MID-ATLANTIC AND NORTHEAST AND BACK INTO
THE LOWER GREAT LAKES/OHIO VALLEY. HEAVY RAINFALL IS LIKELY,
ESPECIALLY ACROSS THE MID-ATLANTIC AND CENTRAL APPALACHIANS, AS
DEEP ATLANTIC MOISTURE WRAPS NORTHWESTWARD INTO THE SYSTEM. GIVEN
THE HEAVY RAINFALL WHICH HAS ALREADY FALLEN TODAY, FLOODING AND
FLASH FLOODING WILL CONTINUE TO BE A THREAT, WITH FLASH FLOOD
WATCHES IN EFFECT THROUGH FRIDAY MORNING.

OUT WEST, SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS THE
FOUR CORNERS REGION AND INTO THE ROCKIES AS A SLOW MOVING SURFACE
COLD FRONT PUSHES INTO THE NORTHERN INTERMOUNTAIN WEST THIS
EVENING, REACHING THE NORTHERN ROCKIES BY THE WEEKEND. LOCALLY
HEAVY RAINFALL WILL BE POSSIBLE, ESPECIALLY ALONG THE FAVORED
TERRAIN OF THE ROCKIES. RAIN ALSO GETS INTO THE PACIFIC NORTHWEST
BY SATURDAY AS THE UPPER LEVEL SYSTEM APPROACHES THE REGION.

AS FOR TEMPERATURES ACROSS THE COUNTRY, UNDER THE UPPER LOW OVER
THE OHIO VALLEY AND BACK INTO THE SOUTHERN PLAINS, TEMPERATURES
ARE EXPECTED TO BE ROUGHLY 5 TO 10 DEGREES BELOW SEASONAL NORMS
FEELING MUCH LIKE FALL SHOULD FEEL. AHEAD OF THE APPROACHING FRONT
IN THE INTERMOUNTAIN WEST, THE OPPOSITE IS TRUE AS TEMPERATURES
COULD BE AS MUCH AS 5 TO 15 DEGREES ABOVE AVERAGE.


SANTORELLI

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