999
FOCN45 CWWG 142000
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 2:00 PM CST SUNDAY
DECEMBER 14 2025.
ALERTS IN EFFECT...FREEZING RAIN WARNING ACROSS NORTH-CENTRAL ALBERTA
AND PORTIONS OF CENTRAL SASKATCHEWAN. SNOWFALL WARNING FOR THE PEACE
RIVER REGION. WIND WARNING FOR SOUTHWESTERN ALBERTA. BLIZZARD
WARNINGS FOR SACHS HARBOUR, PAULATUK AND ULUKHAKTOK.
SYNOPTIC OVERVIEW...ALOFT TODAY, A WEAK UPPER RIDGE OVER WESTERN
NORTH AMERICA IS BRINGING AN INCREASINGLY ZONAL FLOW TO THE PRAIRIES.
TO THE NORTH OF THIS, THE POLAR VORTEX SITS OVER THE CANADIAN ARCTIC
ARCHIPELAGO WITH A LONG-WAVE TROUGH SOUTHWEST TO AN UPPER LOW OVER
THE GULF OF ALASKA AND SOUTHEAST OVER BAFFIN ISLAND. SATELLITE
IMAGERY REVEALS TWO NOTABLE SHORTWAVES RIDING OVER THE UPPER RIDGE:
ONE NEAR IN NORTHERN MANITOBA AND ANOTHER LIFTING INTO NORTHERN
BRITISH COLUMBIA.
AT THE SURFACE, AN OCCLUDED 992 MB LOW SITS UNDER THE POLAR VORTEX
ALONG THE NORTHERN COAST OF VICTORIA ISLAND WITH A COLD FRONT PUSHING
INTO THE REGION FROM THE ARCTIC OCEAN. TO THE SOUTHWEST, A 1025 MB
HIGH SITS OVER YUKON WITH RIDGING SOUTHEAST INTO THE NORTHERN
PRAIRIES. THE ARCTIC FRONT LIES DRAPED FROM THE ALASKA COAST
SOUTHEAST INTO NORTHERN BRITISH COLUMBIA, TURNS EAST ACROSS NORTHERN
ALBERTA INTO NORTHERN SASKATCHEWAN, THEN DROPS SOUTH ALONG THE
SASKATCHEWAN/MANITOBA BORDER. EAST OF THIS, A 1044 MB HIGH SITS OVER
THE AMERICAN PLAINS WITH RIDGING NORTH THROUGH MINNESOTA, NW ONTARIO,
AND INTO CENTRAL HUDSON BAY. LASTLY, A WARM FRONT LIES DRAPED FROM
CENTRAL BRITISH COLUMBIA INTO THE ALBERTA ELBOW REGION THEN SOUTHEAST
ACROSS SOUTHWESTERN SASKATCHEWAN INTO MONTANA.
DISCUSSION...
WESTERN PRAIRIES...LEE LOW DEVELOPING OVER ALBERTA CONTINUES TO
BRING FREEZING RAIN, HEAVY SNOW AND STRONG WINDS TODAY. A STRONGER
SYSTEM WILL MOVE ACROSS THE PROVINCE TOMORROW WITH SIMILAR CONCERNS.
THIS NEXT SYSTEM WILL ALSO BRING AN ACTIVE COLD FRONT ACROSS
EAST-CENTRAL ALBERTA, BRINGING A SHARP DROP IN TEMPERATURES AND
STRONG WIND GUSTS. MOIST W/SW FLOW ALOFT WILL BRING PERIODS OF HEAVY
SNOWFALL TO THE MOUNTAIN PARKS OVER THE FIRST HALF OF THE WEEK.
EASTERN PRAIRIES...A BROAD AREA OF LIGHT SNOW WILL PUSH ACROSS
CENTRAL AND NORTHERN MANITOBA TODAY AS THE ARCTIC FRONT IS PUSHED
EAST ACROSS THE PRAIRIES. LIGHT SNOW WILL SPREAD ACROSS MUCH OF
CENTRAL AND NORTHERN MANITOBA THROUGH THE DAY, WITH ACCUMULATIONS OF
2 CM OR LESS OVER NORTHERN PORTIONS OF THE PROVINCE AND 2 TO 5 CM
OVER CENTRAL REGIONS. A FEW FLURRIES WILL BE POSSIBLE OVER SOUTHERN
MANITOBA, BUT ANY AMOUNTS WILL BE LIMITED BY THE DRY RETURN FLOW
COMING OUT OF THE WESTERN FLANK OF THE DEPARTING RIDGE.
THE NEXT ORGANIZED SNOWFALL FOR THE EASTERN PRAIRIES WILL COME AS
PART OF A POTENT ALBERTA CLIPPER THAT WILL EJECT EAST ACROSS CENTRAL
SASKATCHEWAN ON MONDAY NIGHT. POWERED BY A SURGE OF MILD PACIFIC AIR
JAMMED AGAINST AN IMPINGING ARCTIC AIR MASS, IT WILL SPREAD A SWATH
OF 10 TO 20 CM OF SNOW ACROSS THE NORTHERN PRAIRIES. MUCH OF THE
SOUTHERN PRAIRIES WILL ESCAPE SNOW, WITH NEAR- TO ABOVE-FREEZING
TEMPERATURES POSSIBLE FOR MANY LOCATIONS.
THIS BACK-SIDE OF THIS SYSTEM WILL BRING MODERATE TO STRONG
WEST-NORTHWEST WINDS OF 30 TO 40 KM/H, THOUGH. DEPENDING ON HOW
TEMPERATURES EVOLVE OVER THE SOUTHERN PRAIRIES, THERE COULD BE BRIEF
BLOWING SNOW CONCERNS AS THE WINDS TRACK EAST ACROSS THE SOUTHERN
PRAIRIES.
HOT ON ITS HEELS WILL BE AN EVEN MORE POTENT ALBERTA CLIPPER THAT
WILL TRACK ACROSS THE SOUTHERN PRAIRIES BEGINNING WEDNESDAY.
THIS NEXT SYSTEM HAS THE POTENTIAL TO DROP 10 TO 20 CM OF SNOW ALONG
THE YELLOWHEAD HIGHWAY CORRIDOR IN SASKATCHEWAN INTO MUCH OF SOUTHERN
MANITOBA.
THIS SYSTEM WILL HAVE A STRONG INJECTION OF COLD ARCTIC AIR, BRINGING
STRONG NORTHERLY WINDS OF 50 TO 60 KM/H ON ITS WESTERN FLANK. COUPLED
WITH THE FRESH SNOWFALL, BLIZZARD CONDITIONS MAY BE POSSIBLE WITH
THIS SYSTEM OVERNIGHT WEDNESDAY IN SASKATCHEWAN INTO THURSDAY ACROSS
SOUTHERN MANITOBA.
LASTLY, THE SEVERELY COLD TEMPERATURES WILL COME TO AN END OVER THE
SOUTHERN MANITOBA TODAY AS THE NEXT CLIPPER PUSHES INTO THE REGION.
THE WARMER TEMPERATURES WILL STICK AROUND UNTIL MID-WEEK; THE SECOND
CLIPPER MOVING THROUGH THE REGION WILL PLUNGE ARCTIC AIR BACK SOUTH
THROUGH THE PRAIRIES, LIKELY BRINGING MORE SEVERE COLD TO THE REGION.
NWT...BLIZZARD CONDITIONS WILL WIND DOWN OVER THE NEXT FEW HOURS IN
THE ISR AS THE LOW NORTH OF ULU MOVES EAST.
NUNAVUT...LITTLE ORGANIZED SNOWFALL FOR THE EASTERN ARCTIC IN THE
DAYS AHEAD; THE ONLY NOTABLE SNOWFALL WILL OCCUR ALONG THE SOUTHERN
COAST OF BAFFIN ISLAND WHERE A DEVELOPING ONSHORE FLOW WILL BRING
FLURRIES WITH A RISK OF SQUALLS FROM HUDSON STRAIT ONSHORE. THIS RISK
WILL LAST FOR KINNGAIT (CYTE) AND KIMMIRUT (CYLC) BEGINNING LATE
SUNDAY THROUGH MID-WEEK.
OTHERWISE, AS THE REINFORCEMENT OF THE COLD ARCTIC AIR ASSOCIATED
WITH THE VICTORIA ISLAND LOW PUSHES SOUTHEAST, IT WILL BRING MUCH
COLDER TEMPERATURES BACK INTO THE KIVALLIQ REGION OF NUNAVUT
BEGINNING ON MONDAY. TEMPERATURES WILL FALL INTO THE MID-MINUS 30S
FOR MANY LOCATIONS AND COMBINE WITH WESTERLY WINDS TO PRODUCE WIND
CHILLS OF -50 TO -55 WITH A RISK OF DROPPING INTO THE -55 TO -60
RANGE.
END/VROLIJK/PATTEN
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