399
FXUS01 KWBC 171950
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
249 PM EST SUN FEB 17 2019
VALID 00Z MON FEB 18 2019 - 00Z WED FEB 20 2019
...HEAVY RAIN POSSIBLE OVER PARTS OF THE LOWER
MISSISSIPPI/TENNESSEE VALLEYS AND PARTS OF THE SOUTHERN
APPALACHIANS...
...HEAVY SNOW POSSIBLE OVER PARTS OF LOWER GREAT LAKES INTO NEW
ENGLAND AND OVER PARTS OF THE SOUTHERN/CENTRAL ROCKIES/SOUTHWEST...
...TEMPERATURES WILL BE 20 TO 35 DEGREES BELOW AVERAGE OVER THE
NORTHERN/CENTRAL PLAINS...
A STORM OVER THE OHIO/TENNESSEE VALLEYS WILL MOVE EASTWARD OFF THE
MID-ATLANTIC COAST BY MONDAY MORNING. THE SYSTEM WILL PRODUCE
SNOW OVER PARTS OF THE GREAT LAKES INTO PARTS OF THE OHIO
VALLEY/NORTHERN MID-ATLANTIC THAT WILL MOVE INTO NEW ENGLAND
OVERNIGHT SUNDAY. THE SNOW WILL BEGIN TO TAPER OFF FROM WEST TO
EAST OVER THE GREAT LAKES INTO THE NORTHEAST MONDAY AFTERNOON INTO
EARLY TUESDAY MORNING. THE SYSTEM WILL ALSO PRODUCE RAIN OVER THE
OHIO/TENNESSEE VALLEYS EASTWARD TO THE MID-ATLANTIC INTO THE
SOUTHEAST THAT WILL MOVE OFF THE COAST BY MONDAY EVENING.
ADDITIONALLY, AN AREA OF SHOWERS AND THUNDERSTORMS WILL DEVELOP
ALONG AND AHEAD OF THE ASSOCIATED FRONT FROM PARTS OF THE
SOUTHEAST TO THE CENTRAL GULF COAST THAT WILL, LIKEWISE, MOVE
EASTWARD INTO SOUTHEAST COAST AND FLORIDA BY MONDAY. THE SHOWERS
AND THUNDERSTORMS WILL LINGER OVER FLORIDA THROUGH TUESDAY. ALONG
THE RAIN/SNOW LINE THERE WILL BE POCKETS OF RAIN/FREEZING RAIN
OVER PARTS OF THE NORTHERN MID-ATLANTIC THROUGH MONDAY MORNING.
MEANWHILE, A DEVELOPING UPPER-LEVEL LOW OVER THE GREAT BASIN WILL
MOVE INTO PARTS OF THE SOUTHWEST BY TUESDAY MORNING CONTINUING TO
MOVE EASTWARD INTO THE SOUTHERN ROCKIES BY WEDNESDAY. THE STORM
WILL PRODUCE SNOW OVER THE INTERIOR HIGHER ELEVATION OVER THE
PACIFIC NORTHWEST INTO CALIFORNIA AND SNOW OVER THE NORTHERN
INTERMOUNTAIN REGION INTO THE GREAT BASIN AND THE NORTHERN/CENTRAL
ROCKIES INTO PARTS OF THE SOUTHWEST. THE SNOW WILL BEGIN TO TAPER
OFF OVER THE PACIFIC NORTHWEST, CALIFORNIA, AND THE GREAT BASIN
OVERNIGHT SUNDAY. RAIN ALONG PARTS OF THE PACIFIC NORTHWEST COAST
AND THE CALIFORNIA COAST WILL ALSO TAPER OFF OVERNIGHT SUNDAY. AS
THE UPPER LOW MOVES INTO THE SOUTHWEST, MOISTURE FROM THE WESTERN
GULF OF MEXICO WILL START FLOWING NORTHWESTWARD INTO SOUTHERN
PLAINS AS THE SNOW MOVES INTO PARTS OF THE CENTRAL PLAINS
OVERNIGHT MONDAY. ON TUESDAY, THE SNOW WILL MOVE INTO THE
SOUTHERN HIGH PLAINS AND INTO THE MIDDLE MISSISSIPPI VALLEY BY
TUESDAY EVENING. OVERNIGHT MONDAY, SHOWERS AND THUNDERSTORMS WILL
DEVELOP OVER PARTS OF THE WESTERN GULF COAST INTO PARTS OF THE
SOUTHERN PLAINS BY TUESDAY EVENING. RAIN WILL DEVELOP OVER PARTS
OF THE SOUTHEAST/TENNESSEE VALLEY INTO PARTS OF THE SOUTHERN
PLAINS ON TUESDAY INTO WEDNESDAY.
ELSEWHERE, UPPER-LEVEL ENERGY OVER THE NORTHERN HIGH PLAINS INTO
THE MIDDLE MISSISSIPPI VALLEY WILL AID IN PRODUCING SNOW OVER
PARTS OF THE AREA THROUGH MONDAY AFTERNOON.
ZIEGENFELDER
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