273
FOCN45 CWWG 041900
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 2:00 PM CDT SATURDAY APRIL
4 2026.
ALERTS IN EFFECT...NONE.
SYNOPTIC OVERVIEW...ALOFT, DEEP UPPER LOWS OVER WESTERN ALASKA AND
MINNESOTA WITH ZONAL FLOW OVER WESTERN CANADA. STRONG SHORTWAVE
TROUGH OVER NORTHERN ALBERTA. UPPER HIGH OVER THE BEAUFORT SEA AND
UPPER LOW OVER NORTHERN BAFFIN ISLAND. SLIGHT UPPER RIDING OVER YUKON
TERRITORY AND ONTARIO. NORTHERLY FLOW OVER THE NORTHERN ARCTIC.
AT THE SURFACE, THERE ARE A SERIES OF WEAK LOWS FROM THE GULF OF
ALASKA TO NORTHERN ALBERTA, AND NORTHERN MANITOBA WITH A FRONTAL
BOUNDARY CONNECTING THEM. A 1008 MB LOW SITS IN SOUTHERN WISCONSIN
WITH AN INVERTED TROUGH STRETCHING INTO SOUTHWESTERN MANITOBA.
TWO 1040 MB HIGHS SIT OVER THE NORTHERN NT AND NORTHERN QUEBEC WITH A
RIDGE BETWEEN THEM.
DISCUSSION...
PRAIRIES...DISSIPATING LOW IN NORTHERN MANITOBA WILL BE ABSORBED BY
NORTHERN ALBERTA LOW MOVING EASTWARD TODAY, BRINGING MIXED TYPE
PRECIPITATION TO THE PRAIRIES. THE NEXT LOW IN LINE IS BRINGING HEAVY
SNOW TO PARTS OF NORTHEASTERN ALBERTA AND NORTHWESTERN SASKATCHEWAN.
8 CM WAS OBSERVED IN 2 HOURS IN FORT MCMURRAY THIS MORNING BEFORE THE
HEAVIEST SNOW EXITED THE REGION. UNDER THE HEAVIEST BANDS OF SNOW, UP
TO 15 CM OF TOTAL ACCUMULATION IS POSSIBLE. BY TONIGHT BOTH SNOW
FLURRIES AND SHOWERS WITH A RISK OF FREEZING RAIN ARE POSSIBLE OVER
CENTRAL SASKATCHEWAN AND MANITOBA BRINGING COOLER TEMPERATURES AND
FLURRIES ALONG ITS COLD FRONT ON SUNDAY TO SOUTHERN MANITOBA AND
PARTS OF SOUTHERN SASKATCHEWAN. THE BAROCLINIC ZONE HANGS UP ALONG
THE ALBERTA FOOTHILLS WITH 2-5 CM SNOW EXPECTED FOR EASTER SUNDAY,
INCLUDING THE CITY OF CALGARY. TEMPERATURES OVER MANITOBA WILL DROP
BACK INTO DOUBLE DIGITS BELOW ZERO AGAIN ON MONDAY MORNING.
ARCTIC...A STRENGTHENING GRADIENT OVER THE KIVALLIQ ON SUNDAY WILL
BRING NORTHWESTERLY WINDS OF 40 KM/H GUSTING TO 60 KM/H AND BLOWING
SNOW BUT BLIZZARD CONDITIONS ARE NOT EXPECTED AT THIS TIME.
SOME BLOWING SNOW IS POSSIBLE THROUGH MUCH OF THE KITIKMEOT AND
NORTHWEST ARCHIPELAGO AS WELL. BLIZZARD CONDITIONS ARE POSSIBLE FOR
GJOA HAVEN WITH FALLING SNOW AND A FAVOURABLE WIND REGIME, BUT THE
WIND SPEED LOOKS TO BE SOMEWHAT MARGINAL.
END/FULTON/STAUNTON
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