Prognostic Meteorological Discussion
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000
FXUS01 KWBC 312005
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
402 PM EDT MON AUG 31 2015

VALID 00Z TUE SEP 01 2015 - 00Z THU SEP 03 2015

...HEAVY RAIN POSSIBLE OVER PARTS OF THE PACIFIC NORTHWEST...

...HEAVY RAIN POSSIBLE OVER PARTS OF THE GULF COAST AND EASTERN
CAROLINAS...

IN GENERAL, THE EASTERN HALF OF THE U.S. WILL BE FAIRLY INACTIVE
AS A RIDGE OF HIGH PRESSURE REMAINS IN PLACE. A FEW LOCATIONS MAY
HAVE SCATTERED SHOWER AND THUNDERSTORMS DEVELOP THIS EVENING
THROUGH WEDNESDAY EVENING. PORTIONS OF COASTAL TEXAS AND THE
SOUTHEAST  WILL HAVE SCATTERED TO WIDESPREAD AREAS OF THUNDERSTORM
ACTIVITY AS REMNANTS OF ERIKA PASS THROUGH. HEAVY RAIN AND FLASH
FLOODING MAY BE POSSIBLE FOR WESTERN FLORIDA AND EASTERN CAROLINAS.

THE PACIFIC NORTHWEST AND THE NORTHERN PLAINS WILL REMAIN IN AN
ACTIVE PATTERN AS AN UPPER-LEVEL TROUGH SENDS A SERIES OF
DISTURBANCES THROUGH THE INTERMOUNTAIN WEST. THE CURRENT FRONTAL
SYSTEM WILL CONTINUE TO MOVE THROUGH THE CENTRAL AND NORTHERN
PLAINS THIS EVENING AND INTO TUESDAY. A COLD FRONT WILL GENERATE
ALONG THE NORTHERN ROCKIES WITH A WARM FRONT LIFTING OVER THE
CANADIAN PRAIRIES ON WEDNESDAY AS A WAVE FIRES ACROSS THE FRONT
RANGE. SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE WITH THESE
SYSTEMS THROUGH WEDNESDAY EVENING.

THE PERSISTENT ONSHORE FLOW OFF THE PACIFIC WILL AID IN PRODUCING
SHOWERS AND THUNDERSTORMS OVER PARTS OF THE PACIFIC NORTHWEST AS
WELL. TEMPERATURES HAVE LOWERED SIGNIFICANTLY WITH THIS
UPPER-LEVEL TROUGH PATTERN. RAIN AND SNOW SHOWERS MAY BE POSSIBLE
FOR AREAS OF HIGHER TERRAIN IN BRITISH COLUMBIA; MAINLY IN THE
EARLY MORNING HOURS. IN ADDITION, MONSOONAL MOISTURE AND DAYTIME
HEATING WILL AID IN PRODUCING SHOWERS AND THUNDERSTORMS OVER PARTS
OF THE SOUTHERN/CENTRAL ROCKIES AND PARTS OF THE GREAT
BASIN/SOUTHWEST ON MONDAY AND TUESDAY.


CAMPBELL


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