564
FXUS01 KWBC 170818
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
300 AM EST MON FEB 17 2025
VALID 12Z MON FEB 17 2025 - 12Z WED FEB 19 2025
...A SURGE OF ARCTIC AIR WILL BRING RECORD COLD TEMPERATURES
FURTHER SOUTHWARD INTO THE MID-SECTION OF THE COUNTRY THROUGH THE
NEXT FEW DAYS...
...POTENTIAL OF A WINTER STORM INCREASING FROM THE CENTRAL PLAINS
TO THE MID-MISSISSIPPI VALLEY TUESDAY INTO WEDNESDAY MORNING...
...MOUNTAIN SNOW AND LOWER-ELEVATION RAIN ACROSS THE PACIFIC
NORTHWEST AND NORTHERN ROCKIES WILL HAVE A LULL ON TUESDAY BEFORE
ANOTHER PACIFIC SYSTEM BRINGS THE NEXT ROUND OF UNSETTLED WEATHER
INTO THE PACIFIC NORTHWEST TUESDAY NIGHT...
...SNOW GRADUALLY TAPERS OFF IN NEW ENGLAND TODAY BEHIND A BIG
STORM BUT LAKE-EFFECT SNOW WITH BLUSTERY CONDITIONS CONTINUE...
A LARGE AND INTENSE LOW PRESSURE SYSTEM IS BEGINNING TO MOVE AWAY
FROM NEW ENGLAND AFTER DUMPING MODERATE TO LOCALLY HEAVY SNOW
ALONG WITH A SWATH OF FREEZING RAIN ACROSS NEW ENGLAND. EVEN
THOUGH THE WINTRY PRECIPITATION WILL LARGELY TAPER OFF TODAY, THE
HUGE CIRCULATION OF THE DEEP CYCLONE WILL CONTINUE TO FUNNEL
STRONG AND GUSTY WINDS ACROSS THE ENTIRE NORTHEAST AND THE GREAT
LAKES THROUGH THE NEXT COUPLE OF DAYS. LAKE-EFFECT SNOW WILL ONCE
AGAIN MAKES ITS PRESENCE KNOWN ALONG THE SNOW BELT DOWNWIND FROM
THE GREAT LAKES. IN ADDITION, BLIZZARD WARNINGS REMAIN IN EFFECT
INTO THIS AFTERNOON ALONG THE WESTERN SLOPES OF THE APPALACHIANS
DUE TO SNOW FALLING UNDER VERY GUSTY UPSLOPE FLOW FORCED BY THE
SLOWLY DEPARTING STORM. THE ENHANCED SNOWFALL IS EXPECTED TO
TAPER OFF LATER TODAY AS AN ARCTIC HIGH PRESSURE SYSTEM BEGINS TO
USHER COLDER AND DRIER AIR INTO THE REGION.
MEANWHILE, THE AFOREMENTIONED HIGH PRESSURE SYSTEM WILL CONTINUE
TO PUSH A LARGE POOL OF ARCTIC AIR FROM CANADA DOWN INTO THE
MID-SECTION OF THE COUNTRY THROUGH THE NEXT FEW DAYS.
TEMPERATURES OF 40 DEGREES BELOW NORMAL NEAR THE CANADIAN BORDER
THIS MORNING WILL PLUNGE INTO THE CENTRAL HIGH PLAINS BY TUESDAY.
THIS MEANS THAT ACTUAL TEMPERATURES WILL REMAIN COLDER THAN -30
DEGREES FOR THE NEXT COUPLE OF MORNINGS NEAR THE CANADIAN BORDER
WHILE HIGH TEMPERATURES MAY NOT TOP THE ZERO-DEGREE MARK AS FAR
SOUTH AS NORTHERN KANSAS BY TUESDAY AFTERNOON. WIND CHILL
TEMPERATURES WILL REACH DANGEROUSLY COLD LEVELS BETWEEN -30 AND
-60 DEGREE OVER THE NORTHERN PLAINS.
FARTHER WEST, A PACIFIC SYSTEM WILL CONTINUE TO BRING MOUNTAIN
SNOW AND LOWER-ELEVATION RAIN FROM THE PACIFIC NORTHWEST TO THE
NORTHERN ROCKIES TODAY BUT A LULL IS EXPECTED ON TUESDAY BEFORE
ANOTHER PACIFIC SYSTEM BRINGS THE NEXT ROUND OF UNSETTLED WEATHER
INTO THE PACIFIC NORTHWEST BY TUESDAY NIGHT. MEANWHILE, UPSLOPE
SNOWFALL NORTH OF THE ARCTIC FRONT ACROSS THE NORTHERN ROCKIES
WILL BE CARRIED DOWNSTREAM INTO THE NORTH-CENTRAL PLAINS TODAY.
AS THE ARCTIC HIGH PRESSURE SYSTEM FROM CANADA PUSHES FURTHER
SOUTHWARD, A LOW PRESSURE WAVE IS FORECAST TO DEVELOP ALONG THE
ARCTIC FRONT. IN RESPONSE, SNOW WILL BECOME HEAVIER AND MORE
WIDESPREAD ACROSS THE CENTRAL PLAINS ALONG WITH GUSTY WINDS ON
TUESDAY. A SWATH OF FREEZING RAIN/SLEET CAN ALSO BE EXPECTED TO
DEVELOP FARTHER SOUTH ACROSS OKLAHOMA LATER ON TUESDAY INTO
TUESDAY NIGHT. RAIN SHOWERS WILL ALSO EXPAND IN COVERAGE ACROSS
EASTERN TEXAS WITH THE POSSIBILITY OF STRONG THUNDERSTORMS
DEVELOPING CLOSER TO THE GULF COAST OF LOUISIANA TUESDAY NIGHT
INTO WEDNESDAY MORNING. MEANWHILE, MODERATE TO HEAVY SNOW WILL
SPREAD FARTHER EAST, LIKELY REACHING INTO THE TENNESSEE AND OHIO
VALLEYS WHEREAS THE WINTRY MIX COULD MOVE INTO THE INTERIOR DEEP
SOUTH EARLY ON WEDNESDAY.
KONG
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