Prognostic Meteorological Discussion
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951
FXUS01 KWBC 010754
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
353 AM EDT SAT OCT 01 2016

VALID 12Z SAT OCT 01 2016 - 12Z MON OCT 03 2016

...WIDESPREAD SHOWERS AND THUNDERSTORMS CONTINUES ACROSS THE OHIO
VALLEY, MID-ATLANTIC, AND NORTHEAST THIS WEEKEND...

...SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED AHEAD OF A
FRONTAL BOUNDARY ACROSS THE INTERMOUNTAIN WEST AND THE ROCKIES...

SHOWERS AND THUNDERSTORMS WILL PERSIST ACROSS MUCH OF THE EASTERN
SEABOARD THIS WEEKEND ALONG A SPRAWLING FRONT.  THE SPINNING
UPPER-LEVEL LOW ASSOCIATED WITH THIS SURFACE FEATURE WILL FINALLY
MOVE NORTHEASTWARD BY SUNDAY AS A RIDGE OF HIGH PRESSURE CROSSES
THE CENTRAL CONUS - ALLOWING THE SURFACE FRONT TO PUSH OFFSHORE.
THE HEAVIEST RAINFALL WILL BE LOCATED ALONG AND NORTH OF THE
OCCLUDED FRONT, WHICH WILL BE OVER THE LOWER GREAT LAKES/NORTHERN
MID-ATLANTIC REGION. ANTECEDENT RAINFALL ACROSS PORTIONS OF THE
EAST COAST COMBINED WITH THE PROBABILITY OF ADDITIONAL RAINFALL
WITH KEEP LOCALIZED FLASH FLOODING A THREAT.

MUCH OF THE INTERMOUNTAIN WEST WILL HAVE SHOWERS AND THUNDERSTORMS
OVER THE NEXT COUPLE OF DAYS AS A COLD FRONT SLOWLY CROSSES THE
ROCKIES AND INTO THE ADJACENT HIGH PLAINS. A STEADY STREAM OF GULF
MOISTURE TRAVELING NORTHWARD WILL INTERACT WITH THIS SYSTEM,
YIELDING HIGHER THAN NORMAL PRECIPITATION ACROSS PORTIONS OF
MONTANA AND THE DAKOTAS BY EARLY NEXT WEEK. SNOW WILL BE POSSIBLE
AT HIGHER ELEVATIONS OF THE CASCADES, SAWTOOTHS, ABSAROKAS,
BEARTOOTHS AND THE TETONS.

RAIN WILL STEADILY INCREASE ACROSS THE PACIFIC NORTHWEST AS THE
UPPER LEVEL SYSTEM APPROACHES THE WEST COAST. HEAVY RAINFALL IS
POSSIBLE ALONG THE COASTAL RANGES OF NORTHERN CALIFORNIA AND
SOUTHWEST OREGON THIS EVENING INTO SUNDAY.

CAMPBELL


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





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