465
FXUS01 KWBC 180814
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
300 AM EST TUE FEB 18 2025
VALID 12Z TUE FEB 18 2025 - 12Z THU FEB 20 2025
...WINTER STORM TO TRACK FROM THE CENTRAL PLAINS TO
MID-MISSISSIPPI VALLEY TODAY THROUGH TONIGHT BEFORE IMPACTING THE
SOUTHERN MID-ATLANTIC ON WEDNESDAY WITH ACCUMULATING SNOW AND
AREAS OF SLEET/FREEZING RAIN...
...RECORD COLD TEMPERATURES AND DANGEROUSLY COLD WIND CHILLS TO
SPILL FURTHER SOUTHWARD INTO THE PLAINS WITH BELOW AVERAGE
TEMPERATURES SPANNING ACROSS MUCH OF THE EAST...
...NEXT ROUND OF MOUNTAIN SNOW AND LOWER ELEVATION RAIN EXPECTED
TO AFFECT THE PACIFIC NORTHWEST AND NORTHERN ROCKIES WEDNESDAY
INTO THURSDAY...
AS A LARGE POOL OF ARCTIC AIR CONTINUES TO ADVANCE FURTHER SOUTH
INTO THE MID-SECTION OF THE COUNTRY, THE NEXT WEATHER MAKER IS
BREWING OVER THE CENTRAL/SOUTHERN HIGH PLAINS ALONG A NEARLY
STATIONARY ARCTIC BOUNDARY. WIDESPREAD UPSLOPE SNOWFALL ACROSS
THE NORTHERN ROCKIES INTO THE HIGH PLAINS WILL BEGIN TO EXPAND
EASTWARD AS A LOW PRESSURE WAVE DEVELOPS ALONG THE ARCTIC FRONT
LATER TODAY. WITH THE SUPPORT OF A JET STREAM IN THE UPPER
LEVELS, THE SNOW WILL BECOME MORE FOCUSED ACROSS EASTERN OKLAHOMA
INTO ARKANSAS AND SOUTHERN MISSOURI BY THIS AFTERNOON AND INTO THE
EVENING. THERE IS A GOOD CHANCE OF SEEING 6 INCHES TO LOCALLY A
FOOT OF NEW SNOW BY THE TIME THE SNOW TAPERS OFF WEDNESDAY MORNING
IN THESE AREAS. A SWATH OF SLEET/FREEZING RAIN CAN ALSO BE
EXPECTED ACROSS THE SOUTHERN PORTION OF THESE STATES FROM THIS
AFTERNOON INTO TONIGHT. THE CENTER OF THE LOW PRESSURE WAVE WILL
TRACK JUST OFF THE GULF COAST WITH RAIN AND EVEN SOME EMBEDDED
THUNDERSTORMS FROM EASTERN TEXAS INTO LOUISIANA THROUGH TONIGHT,
AND THEN ACROSS THE REST OF THE GULF COAST STATES AND THROUGH THE
SOUTHEAST INCLUDING THE NORTHERN HALF OF FLORIDA ON WEDNESDAY.
LOCALLY HEAVY RAIN AND ISOLATED INSTANCES OF FLASH FLOODING ARE
POSSIBLE ALONG THE GULF COAST. MEANWHILE, ACCUMULATING SNOWFALL
WILL LIKEWISE SPREAD EASTWARD ACROSS THE TENNESSEE VALLEY AND
SOUTHERN APPALACHIANS ON WEDNESDAY, MOVING INTO THE MID-ATLANTIC
REGION BY WEDNESDAY EVENING. AREAS FROM THE EASTERN KENTUCKY TO
SOUTHERN WEST VIRGINIA ARE EXPECTED TO RECEIVE 4 TO 6+ INCHES OF
SNOW WHILE SOUTHEASTERN VIRGINIA/NORTHEASTERN NORTH CAROLINA AND
POSSIBLY INTO THE EASTERN SHORES COULD SEE 8+ INCHES. SOME
SLEET/ICE CAN ALSO BE EXPECTED FROM THE INTERIOR DEEP SOUTH TO
PORTIONS OF THE CAROLINAS. THE LOW PRESSURE SYSTEM IS FORECAST TO
INTENSIFY RAPIDLY AS IT TRACKS JUST OFF THE CAROLINA COASTLINE AND
THEN OFF THE EAST COAST WEDNESDAY NIGHT INTO THURSDAY MORNING.
THE NORTHERN MID-ATLANTIC THROUGH NEW ENGLAND IS NOT EXPECTED TO
SEE ANY SNOW FROM THIS SYSTEM AT ALL. MEANWHILE, LAKE-EFFECT SNOW
WILL ONCE AGAIN MAKE ITS PRESENCE KNOWN ALONG THE SNOW BELT
DOWNWIND FROM THE GREAT LAKES.
WITH THE FRIGID AIRMASS' CONTINUED SOUTHWARD PLUNGE, TEMPERATURES
DROPPING WELL BELOW ZERO ARE FORECAST FROM MONTANA AND THE DAKOTAS
TO THE UPPER MIDWEST AND SECTIONS OF THE CENTRAL PLAINS, WITH -30S
NEAR THE CANADIAN BORDER FOR THE NEXT COUPLE OF MORNINGS THROUGH
WEDNESDAY. WIND CHILLS WILL REACH DANGEROUSLY COLD LEVELS BETWEEN
-30 AND -60 DEGREES IN THESE AREAS. HIGH TEMPERATURES ARE
FORECAST TO ONLY STAY IN THE SINGLE DIGITS FOR THE NEXT COUPLE OF
AFTERNOONS IN THE CENTRAL PLAINS, SETTING NUMEROUS COLD HIGH
TEMPERATURES. BY THURSDAY MORNING, THE ARCTIC AIR WILL REACH THE
GULF COAST WHERE TEMPERATURES ARE FORECAST TO DIP BELOW FREEZING
WITH NUMEROUS LOW TEMPERATURE RECORDS EXPECTED TO BE BROKEN FROM
THE CENTRAL PLAINS SOUTHWARD TO THE GULF COAST. EXTREME COLD
WARNINGS AND COLD WEATHER ADVISORIES ARE CURRENTLY SPAN ACROSS THE
NORTHERN PLAINS AND UPPER MIDWEST DOWN TO CENTRAL TEXAS. BE SURE
TO DRESS IN LAYERS INCLUDING A HAT, FACE MASK, AND GLOVES IF YOU
MUST GO OUTSIDE.
ELSEWHERE, HEAVY MOUNTAIN SNOW AND LIGHT LOWER ELEVATION SNOW
ACROSS THE NORTHERN ROCKIES THROUGH TODAY WILL TAPER OFF AS THE
NEXT PACIFIC STORM SYSTEM ENTERS THE NORTHWEST EARLY WEDNESDAY.
UNSETTLED WEATHER ASSOCIATED WITH THE NEXT PACIFIC SYSTEM IS
FORECAST TO REACH THE PACIFIC NORTHWEST ON WEDNESDAY. A COMPACT
LOW PRESSURE SYSTEM COULD BE MAKING LANDFALL NEAR THE
WASHINGTON-OREGON BORDER WEDNESDAY NIGHT POSSIBLY BRINGING A
PERIOD OF HIGH WINDS AND HEAVY RAIN INTO THE VICINITY AND AS FAR
SOUTH AS NORTHERN CALIFORNIA. THE LOW IS EXPECTED TO QUICKLY
WEAKEN OVERLAND WHILE MOUNTAIN SNOW WILL SPREAD FARTHER INLAND
ACROSS THE NORTHERN GREAT BASIN INTO THE NORTHERN ROCKIES BY
THURSDAY MORNING. THE SOUTHWEST WILL REMAIN DRY THROUGH THE
FORECAST PERIOD.
KONG
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