113
FOCN45 CWWG 211300
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CST FRIDAY
FEBRUARY 21 2025.
ALERTS IN EFFECT...BLIZZARD WARNING IN GJOA HAVEN.
SYNOPTIC OVERVIEW...ALOFT, AN UPPER LOW IS OVER SOUTHERN NWT WITH
TROUGHING SOUTHWARD THROUGH SK/MB. A SHORTWAVE IS IN THE BASE OF THE
TROUGH, OVER CENTRAL MB. AN UPPER LOW IS OVER THE HIGH ARCTIC WITH
STRONG FLOW AROUND THE LOW. SLACK FLOW ACROSS EASTERN CANADA.
AT THE SURFACE, A DEVELOPING LOW IS EAST OF GREAT SLAVE LAKE WITH
TROUGHING SOUTHWARD THROUGH AB/SK AND NORTHEASTWARD THROUGH MELVILLE
PENINSULA TO NORTHERN BAFFIN. OTHERWISE, ARCTIC HIGH PRESSURE
DOMINATES THE LANDSCAPE, ANCHORED BY A 1041 MB CENTRE OVER SOUTHERN
MINNESOTA. RIDGE FROM SAID HIGH STRETCHES NORTHWARD, THROUGH MAINLAND
NUNAVUT AND UP TO NORTHERN BAFFIN ISLAND.
DISCUSSION...
AB...FREEZING RAIN POTENTIAL IN THE NORTH AND MILD TEMPERATURES WILL
BE THE MAIN STORY FOR THE NEXT FEW DAYS. OVERNIGHT TONIGHT THERE IS
A RISK OF FZRA FROM PEACE RIVER TOWARDS FT MCMURRAY. THE BEST
POTENTIAL IS OVER THE WESTERN PART OF THE RISK AREA. SUNDAY MORNING
A STRONGER SYSTEM MOVES INTO NORTHERN ALBERTA AND WILL HAVE A GOOD
POTENTIAL FOR FZRA.
SATURDAY EVENING THERE IS THE POTENTIAL FOR GUSTS NEAR 100 KM/H IN
WATERTON PARK STILL A FAIR BIT OF UNCERTAINTY IN STRENGTH HERE.
SK/MB...TEMPERATURES WILL CONTINUE TO MODERATE AS A MILD PUSH OF
PACIFIC AIR WILL PRODUCE A WARM UP FOR ALL TODAY, WITH A PERIOD OF
ABOVE SEASONAL TEMPS ON TAP FOR THE WEEKEND AND BEYOND. A FEW SHOTS
OF SNOW OVER FOR FRIDAY AND SATURDAY WILL BE IN STORE FOR CENTRAL SK,
WITH NO NOTABLE ACCUMULATIONS.
LOOKING AHEAD, ON SUNDAY, A MORE ORGANIZED ALBERTA CLIPPER WILL
DEVELOP BRINGING THE RISK OF SOME FREEZING RAIN AND MIXED
PRECIPITATION TO THE CENTRAL PRAIRIES.
NT/HIGH ARCTIC...NORTHWESTERLY GRADIENT THROUGH THE ARCTIC ISLANDS
WILL BRING BLOWING SNOW AND POSSIBLE BLIZZARDS. RESOLUTE WILL BE AN
AREA TO WATCH. THE WORST CONDITIONS THERE SHOULD BE BETWEEN 9 TO 15Z
ON THE 22. THE BEST POTENTIAL WILL BE IN GJOA HAVEN WHERE THE WINDS
WILL STRENGTHEN TOMORROW WITH GUSTS OF 70 KM/H. THESE WINDS AND
TEMPS NEAR -25 HISTORICALLY GIVE BLZD. THERE SHOULD BE SOME LIGHT
SNOW FALLING AT THE TIME AS WELL.
NU...AS THE GREAT SLAVE LAKE LOW DEVELOPS AND MOVES EAST, SNOW AND
SOME BLOWING SNOW WILL BE IN PLACE FOR THE KIVALLIQ TODAY, AND FOR
SOUTHERN BAFFIN ISLAND ON SATURDAY. ACCUMULATIONS AND VISIBILITY
RESTRICTIONS ARE NOT EXPECTED TO BE SIGNIFICANT.
END/CARLSEN/WIELKI
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