625
FOCN45 CWWG 161930
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 2:00 PM CST SATURDAY
NOVEMBER 16 2024.
ALERTS IN EFFECT...BLIZZARD WARNING FOR RESOLUTE. SNOWFALL WARNING
FOR PARTS OF SOUTHEASTERN SASKATCHEWAN AND SOUTHWESTERN MANITOBA.
SYNOPTIC OVERVIEW...ALOFT, A LONG WAVE TROUGH STRETCHES FROM THE
MACKENZIE VALLEY, SOUTH THROUGH ALBERTA/SASKATCHEWAN BEFORE
CONNECTING TO AN UPPER LOW OVER NEVADA. A SECONDARY SHORTWAVE TROUGH
IS EMBEDDED WITHIN SOUTHWESTERLY FLOW ON THE EASTERN FLANK OF THE
LONGWAVE TROUGH JUST NORTH OF THE MANITOBA/NUNAVUT BOUNDARY.
SHORTWAVE RIDGE EXISTS OVER HUDSON BAY AND THE KIVALLIQ REGION.
A CUTOFF LOW OVER ATLANTIC CANADA.
AT THE SURFACE, A 998 MB LOW OVER WESTERN NORTH DAKOTA WITH A WARM
FRONT ARCING NORTH INTO MANITOBA. A POTENT 984 MB LOW OVER THE GULF
OF ALASKA IS ATTACHED TO A FRONTAL WAVE WITH THE WARM FRONT ARCING
INTO NORTHERN BRITISH COLUMBIA BEFORE TRANSITIONING INTO A STATIONARY
FRONT THAT LIES DRAPED ACROSS NORTHERN PRAIRIES. A 1038 MB HIGH SITS
OVER FOXE BASIN.
DISCUSSION...
ALBERTA...STRONG WEST-SOUTHWESTERLY FLOW ACROSS THE ROCKIES WILL GIVE
SOME STRONG DOWNSLOPE WINDS, WITH GUSTS TO 90 KM/H, TO SOUTHWEST
ALBERTA TODAY AND THROUGH THE OVERNIGHT. WINDS WILL EASE AS THE FLOW
WEAKENS ALOFT ON SUNDAY.
NORTHERN SASKATCHEWAN...NO SIGNIFICANT WEATHER EXPECTED, WITH JUST
STRATUS TODAY AND SOME LIGHT SNOW TONIGHT WITH THE PASSAGE OF A COLD
FRONT.
EASTERN PRAIRIES...THE LOW PRESSURE SYSTEM AND ASSOCIATED FRONTAL
WAVE IN MONTANA WILL CONTINUE TO TRACK NORTHEAST TODAY IMPACTING
SOUTHEASTERN SASKATCHEWAN AND WESTERN MANITOBA TODAY. A WINTERY MIX
OF PRECIPITATION IS STILL EXPECTED WITH THIS SYSTEM WITH A HARD RAIN/
SNOW LINE THROUGH EXTREME SOUTHEASTERN SASKATCHEWAN INTO THE MANITOBA
PARKLANDS. WEBCAMS SHOW SNOW BEGINNING TO ACCUMULATE ON THE COLD SIDE
OF THE RAIN/SNOW LINE, BUT ACCUMULATIONS SO FAR LIMITED DUE TO
SURFACE MELTING. RAIN WILL TRANSITION TO SNOW THIS EVENING FOR THE
REST OF SOUTHWESTERN MANITOBA WITH 8-15 CM EXPECTED BY SUNDAY
MORNING. A SNOWFALL WARNING IS IN EFFECT FOR MUCH OF THE AREA.
ROAD CONDITIONS WILL LIKELY BE QUITE SLIPPERY COME SUNDAY MORNING AS
COLD AIR WILL BEGIN ADVECTING SOUTH AS THE NORTHERLY WINDS BEGIN TO
RAMP UP OVERNIGHT. SOUTHEASTERN MANITOBA WILL REMIAN AS PRIMARILY
RAINFALL WITH THIS SYSTEM, WITH A POSSIBLE RAIN/SNOW MIX EARLY SUNDAY
MORNING BEFORE THE LOW BEGINS TO PULL OUT INTO NORTHWESTERN ONTARIO
AND A RIDGE SETTLES INTO THE PRAIRIES IN BEHIND THE LOW.
KITIKMEOT AND HIGH ARCTIC...A TIGHT GRADIENT BETWEEN AN INVERTED
TROUGH OVER THE WESTERN ARCTIC AND A HIGH OVER GREENLAND IS EXPECTED
TO BRING STRONG WINDS AND BLOWING SNOW THROUGH MUCH OF THIS REGION.
WORST WEATHER IS ANTICIPATED FOR RESOLUTE WHERE BLOWING SNOW
CONDITIONS SHOULD DEVOLVE INTO A BLIZZARD BETWEEN THIS AFTERNOON AND
SUNDAY MORNING WHILE SNOW IS FALLING AND WINDS GUST TO 90 KM/H HALL
BEACH AND CAMBRIDGE BAY ARE ALSO EXPECTED TO SEE BLOWING SNOW.
NORTHWEST TERRITORIES...INVERTED TROUGHING OVER THE NT IS EXPECTED TO
BRING A SWATH OF ACCUMULATING SNOW THROUGH SOME COMMUNITIES AROUND
THAT AREA AND THEN INTO NE REGIONS OF THE NT TODAY. AMOUNTS APPEAR TO
BE LIGHT, WITH NO MORE THAN 5 CM FORECAST IN ANY POPULATED AREA.
MODERATE NORTHWESTERLY WINDS AND FALLING TEMPERATURES ARE EXPECTED
FOR SOME COMMUNITIES BEHIND THE SYSTEM.
EASTERN ARCTIC...LIGHT SNOW IS PUSHING INTO THE KIVALLIQ TODAY
SUPPORTED BY THE NORTHWARD MOVING SHORTWAVE TROUGH CURRENTLY OVER THE
SOUTHERN KIVALLIQ. SNOW WILL CONTINUE INTO THE EVENING HOURS WITH
RANKIN/CHESTERFEILD INLET, AND BAKER LAKE PICKING UP 2 CM OF FRESH
SNOW BY SUNDAY MORNING.
NIL SIG WX FOR BAFFIN ISLAND.
END/FULTON/GREENHOUGH
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