906
FXUS01 KWBC 010741
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
241 AM EST SUN DEC 01 2024
VALID 12Z SUN DEC 01 2024 - 12Z TUE DEC 03 2024
...HEAVY LAKE-EFFECT SNOW STARTS TO WIND DOWN OVER THE UPPER GREAT
LAKES LATER ON SUNDAY...
...HEAVY LAKE-EFFECT SNOW CONTINUES DOWNWIND FROM LAKE ERIE
THROUGH TUESDAY...
...LIGHT TO MODERATE SNOW OVER PARTS OF THE NORTHERN PLAINS AND
UPPER/MIDDLE MISSISSIPPI VALLEY AND CENTRAL APPALACHIANS ON
SUNDAY; ON MONDAY, LIGHT TO MODERATE SNOW OVER PARTS OF THE
SOUTHERN OHIO VALLEY...
...TEMPERATURES WILL BE 10 TO 15 DEGREES BELOW AVERAGE OVER PARTS
OF THE NORTHERN PLAINS TO THE OHIO VALLEY AND THE EASTERN THIRD OF
THE COUNTRY...
HIGH PRESSURE OVER CENTRAL CANADA WILL SETTLE SOUTHEASTWARD TO THE
MIDDLE MISSISSIPPI VALLEY BY TUESDAY. THE HIGH PRESSURE WILL ALSO
USHER COLD AIR OVER PARTS OF THE NORTHERN PLAINS TO THE OHIO
VALLEY AND ACROSS THE EASTERN THIRD OF THE COUNTRY, BRINGING
TEMPERATURES OF 10 TO 15 DEGREES BELOW AVERAGE. FREEZE WARNING
WILL BE OVER THE CENTRAL/EASTERN GULF COAST STATES.
THE UPPER-LEVEL TROUGHING OVER THE UPPER MIDWEST/UPPER GREAT LAKES
INTO THE NORTHEAST WILL WEAKEN MONDAY INTO TUESDAY. THE COLD AIR
STREAMING OVER THE GREAT LAKES WILL PRODUCE HEAVY LAKE-EFFECT SNOW
OVER THE UPPER PENINSULA OF MICHIGAN THROUGH MONDAY MORNING.
LIGHTER SNOWFALL WILL DEVELOP OVER MOST OF THE WEST COAST OF THE
LOWER PENINSULA OF MICHIGAN. HOWEVER, HEAVY LAKE-EFFECT SNOW WILL
DEVELOP OVER THE PARTS OF THE NORTHERN LOWER PENINSULA OF MICHIGAN
NEAR THE TRAVERSE CITY TO GAYLORD REGIONS AND WILL START TO TAPER
OFF ON MONDAY INTO TUESDAY. MOREOVER, HEAVY LAKE-EFFECT SNOW WILL
CONTINUE DOWNWIND FROM LAKES ERIE THROUGH TUESDAY. THE HEAVY
LAKE-EFFECT SNOW WILL CONTINUE DOWNWIND OF LAKES ONTARIO ON SUNDAY
AND TAPER OFF ON MONDAY INTO TUESDAY.
MOREOVER, UPPER-LEVEL ENERGY WILL PRODUCE LIGHT TO MODERATE SNOW
OVER PARTS OF THE NORTHERN PLAINS AND UPPER/MIDDLE MISSISSIPPI
VALLEY ON SUNDAY. FURTHERMORE, A WAVE OF LOW PRESSURE WILL CREATE
LIGHT TO MODERATE SNOW OVER PARTS OF THE CENTRAL APPALACHIANS ON
SUNDAY. ON MONDAY, A SECOND WAVE OF LOW PRESSURE WILL CREATE LIGHT
SNOW OVER PARTS OF THE SOUTHERN OHIO VALLEY INTO THE TENNESSEE
VALLEY. A THIRD WAVE OF LOW PRESSURE OVER WEST-CENTRAL CANADA WILL
INITIATE LIGHT SNOW OVER PARTS OF THE UPPER MIDWEST BY TUESDAY
MORNING.
MEANWHILE, WEAK RETURN FLOW OFF THE GULF OF MEXICO WILL CREATE
LIGHT RAIN OVER PARTS OF THE WESTERN GULF COAST ON SUNDAY AND
SCATTERED SHOWERS AND THUNDERSTORMS ON MONDAY. ELSEWHERE,
UPPER-LEVEL RIDGING OVER PARTS OF THE WEST COAST WILL CREATE
STAGNANT AIR CONDITIONS OVER THE VALLEY LOCATIONS FROM INTERIOR
CALIFORNIA INTO THE PACIFIC NORTHWEST, LEADING TO AREAS OF DENSE
FOG AND POOR AIR QUALITY.
ZIEGENFELDER
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