150
FXUS01 KWBC 180738
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
237 AM EST MON DEC 18 2023
VALID 12Z MON DEC 18 2023 - 12Z WED DEC 20 2023
...THERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF
NORTHERN NEW ENGLAND ON MONDAY...
...LAKE-EFFECT SNOW DOWNWIND OF THE GREAT LAKES AND UPSLOPE SNOW
OVER PARTS OF THE NORTHERN/CENTRAL APPALACHIANS...
..RAIN FOR MOST OF THE WEST COAST
A DEEP STORM OVER THE MID-ATLANTIC COAST WILL MOVE NORTHWARD INTO
EASTERN CANADA BY MONDAY EVENING. THE SYSTEM WILL PRODUCE HEAVY
RAIN OVER PARTS OF THE NORTHERN MID-ATLANTIC COAST NORTHWARD TO
NEW ENGLAND. THEREFORE, THE WPC HAS ISSUED A SLIGHT RISK OF
EXCESSIVE RAINFALL OVER PARTS OF THE NORTHERN MID-ATLANTIC COAST
NORTHWARD TO NEW ENGLAND THROUGH TUESDAY MORNING. THE ASSOCIATED
HEAVY RAIN WILL CREATE MAINLY LOCALIZED AREAS OF FLASH FLOODING,
WITH URBAN AREAS, ROADS, AND SMALL STREAMS THE MOST VULNERABLE.
IN ADDITION, THE STORM WILL PRODUCE SHOWERS AND THUNDERSTORMS OVER
THE NORTHERN MID-ATLANTIC COAST/SOUTHERN NEW ENGLAND COAST. THE
THREAT OF HEAVY RAIN ENDS ON TUESDAY AS THE SYSTEM MOVES FARTHER
INTO CANADA.
MOREOVER, IN THE WAKE OF THE DEEP STORM, UPPER-LEVEL ENERGY OVER
THE GREAT LAKES/OHIO VALLEY MOVES EASTWARD TO THE NORTHEAST COAST
BY TUESDAY EVENING. THE ENERGY AND COLD AIR WILL AID IN CREATING
LAKE-EFFECT SNOW DOWNWIND OF THE GREAT LAKES AND UPSLOPE SNOW OVER
PARTS OF THE NORTHERN/CENTRAL APPALACHIANS ON MONDAY INTO
WEDNESDAY. ON MONDAY, THE HEAVIEST SNOW WILL BE OVER PARTS OF THE
CENTRAL APPALACHIANS AND SOUTHEAST FROM LAKE MICHIGAN IN MICHIGAN
AND INDIANA. ADDITIONALLY, ANOTHER AREA OF THE HEAVIEST SNOW WILL
BE ALONG THE CENTRAL AND EASTERN SHORE OF LAKE ERIE IN OHIO AND
NEW YORK STATE. THE LAKE-EFFECT SNOW WILL BE MUCH LIGHTER ON
TUESDAY AND END OVER THE UPPER GREAT LAKES.
MEANWHILE, A FRONT MOVING ONSHORE OVER THE WEST COAST ON MONDAY
WILL PRODUCE RAIN OVER MOST OF THE PACIFIC NORTHWEST ON MONDAY
INTO TUESDAY EVENING AND CALIFORNIA ON MONDAY INTO WEDNESDAY
MORNING. THE SYSTEM WILL ALSO PRODUCE LOCALLY HEAVY SNOW OVER THE
HIGHEST ELEVATIONS OF THE SIERRA NEVADA MOUNTAINS AND LIGHTER SNOW
OVER THE HIGHEST ELEVATIONS OF THE CASCADES AND PARTS OF IDAHO AND
NEVADA.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page