Prognostic Meteorological Discussion
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000
FXUS01 KWBC 202058
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
458 PM EDT WED SEP 20 2017

VALID 00Z THU SEP 21 2017 - 00Z SAT SEP 23 2017

...TROPICAL STORM JOSE WILL PRODUCE DANGEROUS SURF CONDITIONS AND
RIP CURRENTS ALONG WITH HEAVY RAIN OVER PARTS OF SOUTHERN NEW
ENGLAND COAST...

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE UPPER GREAT LAKES/UPPER MISSISSIPPI VALLEY...

...HEAVY SNOW POSSIBLE IN THE HIGHER ELEVATIONS OF THE NORTHERN
ROCKIES...

TROPICAL STORM JOSE WILL CONTINUE TO WEAKEN AS IT MOVES
NORTHEASTWARD THEN RETURNS SOUTHWESTWARD WHILE REMAINING OFF THE
NORTHEAST COAST.  THE STORM WILL PRODUCE RAIN WITH EMBEDDED
THUNDERSTORMS OVER PARTS OF SOUTHERN NEW ENGLAND COAST THROUGH
FRIDAY.  FOR MORE INFORMATION ON JOSE, PLEASE REFER TO THE
NATIONAL HURRICANE CENTER (WWW.HURRICANES.GOV).

MEANWHILE, A FRONT EXTENDING FROM THE UPPER GREAT LAKES/UPPER
MISSISSIPPI VALLEY SOUTHWESTWARD TO THE SOUTHERN PLAINS WILL MOVE
EASTWARD INTO THE GREAT LAKES/MIDDLE MISSISSIPPI VALLEY AND
DISSIPATES ON THURSDAY AFTERNOON INTO EVENING.  SHOWERS AND
THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE UPPER GREAT
LAKES/MIDDLE MISSISSIPPI VALLEY THAT WILL MOVE INTO THE GREAT
LAKES/MIDDLE MISSISSIPPI VALLEY OVERNIGHT WEDNESDAY WHILE
DISSIPATING OVER THE MIDDLE MISSISSIPPI VALLEY BY THURSDAY
AFTERNOON.  THE SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER PARTS
OF NORTHERN MICHIGAN THROUGH FRIDAY.

ANOTHER FRONT OVER THE NORTHERN ROCKIES/NORTHERN HIGH PLAINS INTO
PARTS OF THE GREAT BASIN/NORTHERN CALIFORNIA WILL MOVE TO THE
UPPER MISSISSIPPI VALLEY AND THE NORTHERN/CENTRAL PLAINS INTO THE
CENTRAL ROCKIES/GREAT BASIN BY FRIDAY.  THE SYSTEM WILL PRODUCE
RAIN WITH EMBEDDED THUNDERSTORMS WITH SNOW AT THE HIGHEST
ELEVATIONS OVER THE NORTHERN ROCKIES AND RAIN OVER THE PACIFIC
NORTHWEST THAT WILL WANE OVER THE NORTHWEST BY THURSDAY MORNING.
THE RAIN WITH HIGHER ELEVATIONS SNOW OVER THE NORTHERN ROCKIES
WILL CONTINUE THROUGH FRIDAY.  RAIN WITH AREAS OF ISOLATED SNOW AT
HIGHEST ELEVATIONS WILL MOVE INTO THE GREAT BASIN/INTERIOR CENTRAL
CALIFORNIA OVERNIGHT WEDNESDAY INTO FRIDAY.  IN ADDITION, SHOWERS
AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE UPPER/MIDDLE
MISSISSIPPI VALLEY EXPANDING INTO THE UPPER GREAT LAKES OVERNIGHT
THURSDAY INTO FRIDAY.

ELSEWHERE, UPPER-LEVEL ENERGY AND MOISTURE OVER WESTERN GULF COAST
TO SOUTHEAST/MID-ATLANTIC WILL AID IN PRODUCING SHOWERS AND
THUNDERSTORMS OVER THE REGION THROUGH FRIDAY.  THE AREAL COVERAGE
WILL BE GREATEST DURING THE LATE AFTERNOON INTO THE LATE EVENING
ON WEDNESDAY INTO FRIDAY.


ZIEGENFELDER


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





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