779
FOCN45 CWWG 311200
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CDT MONDAY MARCH
31 2025.
ALERTS IN EFFECT...NONE AT THIS TIME.
SYNOPTIC OVERVIEW...ALOFT, THE WEST IS DOTTED WITH LOW CENTRES OVER
THE EASTERN PACIFIC, AND OVER CENTRAL PORTIONS OF THE MACKENZIE RIVER
VALLEY. A HIGH CENTRE LIES WEST OF ALASKA WHILE A RIDGE EMANATING
FROM COLORADO POKES UP INTO SOUTHWESTERN SK. A COL OVER CENTRAL BC
ACTS AS THE BULLSEYE BETWEEN EACH OF THE AFOREMENTIONED FOUR
FEATURES. LOW CENTRE OVER HUDSON STRAIT WITH AN ASSOCIATED TROUGH
DIGGING BACK SOUTHWESTWARDS ALONG THE NORTHERN MB/ONT BORDER.
AT THE SURFACE, LOW PRESSURE RESIDES OFF THE PACIFIC NORTHWEST.
A DEEP 979 MB LOW SITS OVER THE ARCTIC OCEAN WITH TROUGHING INTO THE
BEAUFORT SEA. AN ARCTIC RIDGE OF HIGH PRESSURE STRETCHES FROM YUKON
TERRITORY TOWARDS THE MAIN HIGH CENTRE NEAR ENNADAI LAKE AND DOWN
ALONG THE SK/MB BORDER. RIDGING FROM THE ENNADAI CENTRE ALSO ARCS
BACK INTO THE HIGH ARCTIC, AND EAST, THROUGH HUDSON BAY, ACROSS
NORTHERN QUEBEC TO LABRADOR. RELATIVE SLACK FLOW OVER BAFFIN.
DISCUSSION...
AB...NOT MUCH IN THE WAY OF SIG WX FOR ALBERTA TODAY, WITH STRATUS
CLOUD BLANKETING MUCH OF THE PROVINCE.
NORTHERN ALBERTA WILL BE CLIPPED BY A COLD FRONT SWINGING DOWN FROM
THE MACKENZIE TONIGHT AND TUESDAY, WITH UP TO 10 CM OF SNOW EXPECTED
DURING THAT 24 HOUR PERIOD FOR THE NORTHERNMOST PARTS OF THE
PROVINCE.
AS THE COLD FRONT CONTINUES TO SWEEP SOUTH ON TUESDAY, THE ASSOCIATED
INSTABILITY AND UPSLOPE FLOW WILL TRIGGER RAIN/SNOW SHOWERS ALONG THE
FOOTHILLS AND ROCKIES. SNOW LEVELS ARE FORECAST TO BE NEAR VALLEY
BOTTOM FOR THE MOUNTAIN PARKS, AND THE LOW LEVELS ARE EXPECTED TO
COOL AND SATURATE FAIRLY QUICKLY AFTER THE ONSET OF PRECIPITATION, SO
A FEW CENTIMETRES OF ACCUMULATION ARE EXPECTED IN THE AFTERNOON.
A LIGHTNING STRIKE OR TWO WOULD ALSO NOT BE OUT OF THE QUESTION.
THE SNOW LOOKS TO INTENSIFY TUESDAY NIGHT.
MB/SK...COOL, CALM CONDITONS REMAIN THE NAME OF THE GAME TO START THE
WORK WEEK ACROSS THE EASTERN PRAIRIES. WX WILL REMAIN RATHER QUIET
UNTIL LATE TUESDAY AFTERNOON WHEN TWO SEPARATE DISTURBANCES, ONE
RIDING THE 60TH PARALLEL TOWARDS NORTHERN SK, AND A SECOND,
APPROACHING SOUTHERN MB FROM THE DAKOTAS, START TO SPREAD SNOW ACROSS
BOTH REGIONS. UPWARDS OF 5 TO 10 CM IS EXPECTED ACROSS NORTHERN SK
TUESDAY NIGHT, WITH SIMILAR ACCUMULATIONS EXPECTED ACROSS FAR
NORTHWESTERN MB WEDNESDAY. DOWN SOUTH, MODELS ARE STILL NOT IN
AGREEMENT WITH THE LOCATION AND AMOUNT OF SNOW COMING FOR PORTIONS OF
SOUTHERN MB WEDNESDAY. PRESENTLY, THE ECMWF PAINTS MOST REGIONS ALONG
AND SOUTH OF THE TRANSCANADA (INCLUDING WINNIPEG) WITH 5 TO 10 CM OF
SNOW, WHERE AS THE GEM HAS THE HEAVIEST SNOW AXIS STATE-SIDE,
COMPLETELY MISSING THE PROVINCE. THE GFS SPLITS THE MIDDLE, GIVING 5
TO 10 CM TO THE SPRAGUE REGION. STAY TUNED!
NWT...THE MACKENZIE VALLEY LOW WILL BRING SNOW TO SOUTHERN PORTIONS
OF THE NWT TODAY AND TUESDAY. GENERALLY AMOUNTS ARE EXPECTED TO
REMAIN SUB-WARNING (THOUGH CANADIAN GUIDANCE IS THE MOST AGGRESSIVE
ON AMOUNTS). THE SOUTHERN DEHCHO REGION WILL SEE THE HEAVIEST SNOW
TODAY, WITH 5-10 CM ON TAP. THE SYSTEM WILL SLOWLY SHIFT EAST TOWARDS
GREAT SLAVE LAKE TONIGHT, BRINGING SIMILAR AMOUNTS TO COMMUNITIES IN
THE AREA.
SOME BLOWING SNOW IS POSSIBLE OVER THE AMUNDSEN GULF TODAY AND
TONIGHT, WITH WINDS REACHING UP TO 50G70 KM/H IN SACHS HARBOUR AND
PAULATUK. OBSERVATIONS (THOUGH SPARSE) SUGGEST LITTLE IN THE WAY OF
LOOSE SNOW TO BE BLOWN AROUND SO THE STRONGEST CHANCE OF POOR
VISIBILITY IS TONIGHT, WITH STRONG WINDS COINCIDE WITH LIGHT
FALLING SNOW.
NU...NIL SIG WX.
END/DYKES/STAUNTON
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