301
FXUS01 KWBC 111941
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
240 PM EST SAT JAN 11 2025
VALID 00Z SUN JAN 12 2025 - 00Z TUE JAN 14 2025
...CRITICAL FIRE WEATHER CONDITIONS CONTINUE FOR SOUTHERN
CALIFORNIA...
...CLIPPER SYSTEM BRINGING SNOW SHOWERS TO THE UPPER MIDWEST/GREAT
LAKES THIS WEEKEND...
...MODERATE TO LOCALLY HEAVY SNOW FOR THE PARTS OF THE NORTHERN TO
CENTRAL ROCKIES...
...BELOW AVERAGE, FRIGID WINTER TEMPERATURES CONTINUE FOR MUCH OF
THE LOWER 48...
CRITICAL FIRE-WEATHER CONDITIONS WILL UNFORTUNATELY RAMP UP AGAIN
TODAY FOR SOUTHERN CALIFORNIA AND LAST THROUGH AT LEAST EARLY NEXT
WEEK AS PERIODIC ENHANCEMENTS OF OFF-SHORE WINDS CONTINUE. THE
STORM PREDICTION CENTER HAS HIGHLIGHTED THE REGION WITH THIS
CRITICAL RISK (LEVEL 2/3) DUE TO FORECAST SUSTAINED WINDS OF 20
MPH, WITH GUSTS TO 40+, AND DRY RELATIVE HUMIDITY. THIS MAY LEAD
TO THE SPREAD OF ONGOING FIRES AS WELL AS THE DEVELOPMENT OF NEW
ONES.
WINTER-WEATHER WISE, A CLIPPER SYSTEM CROSSING THE UPPER
MIDWEST/GREAT LAKES THIS WEEKEND WILL BRING WIDESPREAD SNOW
SHOWERS TO THE REGION. AMOUNTS SHOULD GENERALLY RANGE BETWEEN
3-6", WITH SOME LOCALLY HEAVIER AMOUNTS (8+") POSSIBLE, ESPECIALLY
WHERE LAKE-ENHANCED SNOWFALL OCCURS ALONG BOTH THE UPPER PENINSULA
AND WESTERN MICHIGAN AND DOWNWIND OF LAKES ERIE AND ONTARIO. A
PERIOD OF MORE PROLONGED LAKE-EFFECT SNOWS WILL ALSO SETTLE IN
DOWNWIND OF LAKES ERIE AND ONTARIO CONTINUING BEYOND THE CURRENT
FORECAST PERIOD WITH NORTHWESTERLY FLOW IN PLACE. A SHORTWAVE
PASSING OVER THE GREAT BASIN/ROCKIES AIDED BY UPSLOPE FLOW ON THE
BACKSIDE OF THE CLIPPER SYSTEM WILL ALSO CONTINUE TO BRING SNOW TO
NORTHERN/CENTRAL ROCKIES AND ADJACENT HIGH PLAINS AS WELL AS THE
EASTERN GREAT BASIN. HEAVY ACCUMULATIONS (1-2 FEET) ARE FORECAST
FOR THE AREAL MOUNTAIN RANGES, WITH SOME MODERATE AMOUNTS OF 3-6
INCHES IN THE NORTHERN HIGH PLAINS. ELSEWHERE, SOME LIGHT SNOW
SHOWERS WILL CONTINUE ACROSS PORTIONS OF NEW ENGLAND AND THE
INTERIOR NORTHEAST THROUGH SATURDAY NIGHT AS A LOW PRESSURE SYSTEM
DEPARTS THE REGION INTO THE ATLANTIC. TO THE SOUTH, A LOW PRESSURE
SYSTEM TRAVERSING THE GULF OF MEXICO WILL BRING SOME MODERATE TO
LOCALLY HEAVY RAIN SHOWERS TO THE WESTERN GULF COAST SUNDAY, THE
CENTRAL GULF COAST SUNDAY NIGHT, AND THE GULF COAST OF FLORIDA BY
MONDAY.
HIGH TEMPERATURES ARE FORECAST TO REMAIN BELOW AVERAGE FOR MUCH OF
THE LOWER 48 WITH BROAD UPPER-TOUGHING IN PLACE, ANCHORED BY AN
UPPER-LOW OVER SOUTHEASTERN CANADA. PERIODIC SWEEPING COLD FRONT
PASSAGES WILL KEEP BRINGING WAVES OF FRIGID CANADIAN AIR
SOUTHWARD. CONDITIONS BROADLY WILL TEND TO BE AT LEAST 5-15
DEGREES BELOW AVERAGE, PARTICULARLY OVER NORTH-CENTRAL PORTIONS OF
THE COUNTRY THE NEXT COUPLE OF DAYS. FORECAST HIGHS IN THE
UPPER-MIDWEST AND NORTHERN PLAINS WILL GENERALLY BE IN THE SINGLE
DIGITS AND TEENS, WITH WIND CHILLS AS LOW AS -25. FORECAST
TEMPERATURES MORE GENERALLY RANGE FROM THE TEENS AND 20S ACROSS
THE MIDWEST; THE 20S AND 30S IN THE ROCKIES; THE 30S AND 40S FOR
THE INTERIOR WEST AND FROM THE CENTRAL/SOUTHERN PLAINS EAST
THROUGH THE MID-SOUTH/SOUTHEAST TO THE EAST COAST; AND THE 50S TO
LOW 60S FOR THE GULF COAST, DESERT SOUTHWEST, AND CALIFORNIA.
FROST AND FREEZE-RELATED ADVISORIES/WARNINGS ARE IN PLACE ACROSS
SEASONALLY MORE TEMPERATE PORTIONS OF THE COUNTRY INCLUDING
SOUTHERN GEORGIA/NORTHERN FLORIDA, THE DESERT SOUTHWEST, AND THE
CENTRAL CALIFORNIA VALLEYS AS LOWS IN THE 30S MAY DAMAGE SENSITIVE
VEGETATION.
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