057
FXUS01 KWBC 010340
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1039 PM EST TUE DEC 31 2024
VALID 12Z WED JAN 01 2025 - 12Z FRI JAN 03 2025
...COASTAL STORM TO BRING RAIN AND SNOW SHOWERS TO THE NORTHEAST
NEW YEAR'S DAY...
...WARMING TREND FOR THE WESTERN U.S. WHILE THE NORTHERN/EASTERN
U.S. EXPERIENCES COLDER TEMPERATURES THROUGH THE END OF THE WORK
WEEK...
...LONG DURATION LAKE EFFECT SNOW EVENT EXPECTED TO BEGIN
UNFOLDING TOMORROW DOWNWIND OF THE GREAT LAKES...
AN AREA OF LOW PRESSURE WILL MOVE ACROSS THE INTERIOR
NORTHEAST/QUEBEC WHILE A SECONDARY LOW PRESSURE SYSTEM DEVELOPS
ALONG THE NEW ENGLAND COAST TODAY. COLDER TEMPERATURES WILL FILTER
INTO THE EASTERN U.S. BEHIND A TRAILING COLD FRONT WHICH WILL
ALLOW FOR A CHANGEOVER TO SNOW FOR INTERIOR PORTIONS OF THE
NORTHEAST ON NEW YEAR'S DAY AS THE SURFACE LOW DEEPENS AND SLOWLY
TRACKS NORTHWARD INTO EASTERN QUEBEC. THIS STORM WILL MARK THE
BEGINNING OF A PATTERN CHANGE FOR THE LOWER 48 WHERE COLDER AIR
WILL SINK SOUTHWARD FROM CENTRAL CANADA INTO THE NORTHERN PLAINS,
EVENTUALLY SWEEPING EASTWARD. FROM THE NORTHERN TO EASTERN U.S.,
TEMPERATURES WILL FALL EACH DAY WITH VALUES APPROACHING AVERAGE
FOR NEW ENGLAND ON THURSDAY WHILE BELOW AVERAGE TEMPERATURES
STRETCH FROM NORTHERN MONTANA TO THE MID-ATLANTIC AND SOUTHEAST
COASTS. THE COLDER AIR FLOWING ACROSS THE STILL RELATIVE WARMTH OF
THE GREAT LAKES WILL SET UP A FAVORABLE PATTERN FOR LAKE EFFECT
SNOW SHOWERS, STARTING TODAY, WHICH SHOULD PERSIST THROUGH THE END
OF THE WEEK. SNOWFALL ACCUMULATIONS ARE EXPECTED TO BE GREATEST
FOR LOCATIONS EAST OF LAKE ONTARIO AND ERIE THROUGH THURSDAY
EVENING WITH 6 TO 12+ INCHES IN THE FORECAST, BUT ADDITIONAL SNOW
IS LIKELY INTO THE WEEKEND AS WELL.
ACROSS THE WEST COAST, A SERIES OF PACIFIC FRONTS WILL TRACK INTO
NORTHERN CALIFORNIA, OREGON AND WASHINGTON OVER THE NEXT COUPLE OF
DAYS AND WEAKEN AS THEY MOVE INLAND. THESE SYSTEMS WILL BRING
LIGHT, MODERATE AND OCCASIONALLY HEAVY RAIN TO THE COAST OF
NORTHERN CALIFORNIA AND OREGON WHERE 2 TO 4 INCHES OF RAIN IS
EXPECTED THROUGH THURSDAY EVENING. LIGHTER RAINFALL IS EXPECTED
FARTHER NORTH INTO WESTERN WASHINGTON WHILE ACCUMULATING SNOW
FALLS INTO THE NORTHERN/CENTRAL ROCKIES, WITH THE HIGHEST SNOWFALL
ACCUMULATIONS EXPECTED FOR THERE THROUGH THURSDAY (6-18 INCHES,
DEPENDING ON ELEVATION).
IN ADDITION, AN INCREASE IN FIRE WEATHER CONCERNS FOR PARTS OF THE
TRANSVERSE RANGES OF SOUTHERN CALIFORNIA WILL EXIST TODAY, WITH AN
ELEVATED RISK FOR OF THE SPREADING OF WILDFIRES LINGERING IN
SOUTHERN CALIFORNIA FOR NEW YEAR'S DAY. GUSTY WINDS AND LOW
RELATIVE HUMIDITIES WILL CONTRIBUTE TO THE RISK. REGARDING
TEMPERATURES, MANY LOCATIONS WEST OF THE ROCKIES WILL EXPERIENCE A
WARMING TREND OVER THE NEXT FEW DAYS AS AN UPPER RIDGE BEGINS TO
BUILD ACROSS THE SOUTHWEST.
KEBEDE/OTTO
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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