689
FXUS01 KWBC 191930
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
229 PM EST THU DEC 19 2024
VALID 00Z FRI DEC 20 2024 - 00Z SUN DEC 22 2024
...LIGHT TO MODERATE SNOW, WITH LOCALLY HIGHER AMOUNTS, WILL
DEVELOP OVER PARTS OF THE GREAT LAKES, CENTRAL APPALACHIAN, AND
NORTHEAST...
...WINTER WEATHER ADVISORIES AND WARNINGS OVER PARTS OF THE UPPER
MIDWEST...
..LIGHT RAIN OVER PARTS OF THE NORTHWEST COAST
ON THURSDAY, LOW PRESSURE OVER THE MIDDLE MISSISSIPPI/OHIO VALLEYS
WILL MOVE EASTWARD TO THE MID-ATLANTIC BEFORE MOVING OFF THE EAST
COAST OVERNIGHT FRIDAY. THE SYSTEM WILL PRODUCE LIGHT TO MODERATE
SNOW, WITH LOCALLY HIGHER AMOUNTS OVER PARTS OF THE GREAT
LAKES/OHIO VALLEY REGION THROUGH LATE FRIDAY NIGHT. ADDITIONALLY,
A NORTHEAST WIND WILL CREATE MODERATE TO HEAVY LAKE-ENHANCED SNOW
OVER PARTS OF THE NORTHEASTERN COAST OF THE LOWER PENINSULA OF
MICHIGAN OVERNIGHT THURSDAY INTO FRIDAY. THE STORM HAS PROMPTED
WINTER WEATHER WARNINGS AND ADVISORIES OVER PARTS OF THE UPPER
MIDWEST.
OVERNIGHT THURSDAY, LIGHT TO MODERATE SNOW WILL DEVELOP OVER PARTS
OF THE NORTHEAST, EXTENDING INTO SATURDAY. BY FRIDAY AFTERNOON,
LIGHT SNOW WILL DEVELOP OVER PARTS OF THE CENTRAL APPALACHIANS,
BECOMING LIGHT TO MODERATE OVERNIGHT FRIDAY INTO SATURDAY. IN THE
WAKE OF THE STORM, TEMPERATURES WILL BE 10 TO 15 DEGREES BELOW
AVERAGE FROM THE GREAT LAKES AND MIDDLE/LOWER MISSISSIPPI VALLEY
EASTWARD TO THE COAST. MOREOVER, UPPER-LEVEL ENERGY WILL PRODUCE
LIGHT SNOW OVER PARTS OF THE NORTHERN PLAINS/UPPER MISSISSIPPI
VALLEY FROM FRIDAY AFTERNOON INTO SATURDAY. FURTHERMORE, ON
THURSDAY, LOW PRESSURE NEAR THE SOUTHERN MID-ATLANTIC COAST WILL
PRODUCE LIGHT RAIN OVER PARTS OF THE REGION THROUGH SATURDAY
NIGHT. ALSO, LIGHT RAIN WILL DEVELOP OVER PARTS OF THE NORTHERN
MID-ATLANTIC COAST ON FRIDAY AFTERNOON, CHANGING OVER TO SNOW OVER
THE NEW JERSEY COAST BY SATURDAY MORNING.
MEANWHILE, MULTIPLE FRONTS OVER THE EASTERN PACIFIC WILL MOVE
CLOSE TO THE WEST COAST AND DISSIPATE, BRINGING A FEW ROUNDS OF
MOISTURE INTO THE COAST. LIGHT RAIN WILL DEVELOP OVER PARTS OF THE
NORTHWEST COAST OVERNIGHT THURSDAY, ENDING BY FRIDAY MORNING.
HOWEVER, A SECOND ROUND OF MOISTURE WILL CREATE LIGHT RAIN OVER
PARTS OF THE PACIFIC NORTHWEST COAST BY FRIDAY AFTERNOON. ON
SATURDAY, A STRONGER PLUM OF MOISTURE WILL PRODUCE LIGHT RAIN OVER
PARTS OF NORTHWEST AND NORTHERN/CENTRAL CALIFORNIA, WITH SNOW AT
THE HIGHEST ELEVATIONS.
ZIEGENFELDER
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