707
FOCN45 CWWG 261900
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 2:00 PM CDT FRIDAY APRIL
26 2024.
ALERTS IN EFFECT...BLIZZARD WARNING FOR MUCH OF THE KIVALLIQ.
SNOWFALL WARNING FOR KINNGAIT.
SYNOPTIC OVERVIEW...UPPER AIR ANALYSIS SHOWED AN UPPER LOW OVER THE
KIVALLIQ ALONG WITH ANOTHER UPPER LOW OVER THE HIGH ARCTIC. WEAK
RIDGING OVER ONTARIO.
AT THE SURFACE, A 994 MB LOW OVER WESTERN HUDSON BAY WITH A WARM
FRONT EAST AND COLD FRONT SOUTHWEST. RIDGE OF HIGH PRESSURE OVER
QUEBEC EXTENDING INTO SOUTHERN BAFFIN ISLAND. A SECOND RIDGE OF HIGH
PRESSURE ARCS FROM THE BEAUFORT SEA INTO NWT.
DISCUSSION...
WRN PRAIRIES...MAINLY A QUIET DAY OVER ALBERTA TODAY, WITH A RIDGE
BUILDING OVER THE PROVINCE. AN EASTERLY UPSLOPE FLOW INTO THE THE
FOOTHILLS REGION, ALONG WITH AN APPROACHING SHORTWAVE FROM SOUTHERN
BC WILL BRING SOME SNOW TO THE MOUNTAIN PARKS REGIONS. SNOWFALL
FORECAST TO FALL IN THE KANANASKIS AND BANFF/LAKE LOUISE AREAS,
WHERE 2-4 CM OF SNOW IS EXPECTED. OTHERWISE, AT TO SLIGHTLY BELOW
SEASONAL TEMPERATURES ARE FORECAST ACROSS MOST OF THE PROVINCE AS
RIDGE PUSHES IN SOME COOLER AIR FROM THE ARCTIC.
NT...AN EASTERLY FLOW INTO THE MOUNTAIN RANGE WILL BRING SOME STEADY
SNOW TO A FEW COMMUNITIES TODAY AND TONIGHT. SNOWFALL AMOUNTS ARE
NOT EXPECTED TO BE SIGNIFICANT WITH NO MORE THAN 2-4 CM EXPECTED
BEFORE THE SNOW TAPERS OFF BY SATURDAY.
KIVALLIQ...LOW CURRENTLY OVER WESTERN HUDSON BAY MOVES NORTHEASTWARD
AND INTENSIFIES, BRINGING SNOW AND BLOWING SNOW TO THE AREA TODAY
THROUGH SUNDAY. TOTAL SNOWFALL ACCUMULATIONS OF 10-15 CM ARE
EXPECTED FOR SOME OF THE AREA, NOTABLY SOUTHAMPTON ISLAND AND
SOUTHWESTERN BAFFIN ISLAND. STRONG NORTHEASTERLY WINDS TODAY WILL
BRING BLIZZARD OR NEAR-BLIZZARD CONDITIONS TO MUCH OF THE
KIVALLIQ COAST AND SOUTHAMPTON ISLAND.
A BLIZZARD WARNING HAS BEEN ISSUED FOR CORAL HARBOR AS THIS SYSTEM
RAMPS UP FOR THE REGION, AND THE TOWNSITE WILL BE LOOKING AT TWO
DIFFERENT PERIODS OF BLIZZARD CONDITIONS. DURING THE DAY TODAY,
STRONG SOUTHEASTERLY WINDS AHEAD OF THE SYSTEM WILL FUNNEL WINDS
THROUGH SOUTHERN SOUTHAMPTON ISLAND ALLOWING FOR NEAR ZERO VISIBILITY
IN THE GUSTY WINDS AND FALLING SNOW. THE WINDS WILL RELAX OVERNIGHT
AS THE CENTER OF THE SYSTEM PASSES OVER THE TOWNSITE, BUT WINDS WILL
REDEVELOP ON SATURDAY AS THE SYSTEM PULLS OFF TO FOXE BASIN AND THE
WINDS TURN AROUND TO BE FROM THE NORTHWEST. THE SECOND ITERATION OF
STRONG WINDS AND BLIZZARD CONDITIONS ON SATURDAY WILL LIKELY BE WORSE
THAN THE WINDS AND BLIZZARD CONDITIONS ON FRIDAY.
KINNGAIT HAS SOME UNCERTAINTY WITH BLIZZARD BUT HIGHER CONFIDENCE IN
HEAVY SNOW. THERE ARE TWO PERIODS OF CONCERN. TONIGHT SOUTHEASTERLY
WINDS WILL COMBING WITH FALLING SNOW TO GIVE NEAR BLIZZARD
CONDITIONS. DURATION MAY BE DIFFICULT TO MEET TONIGHT. AFTER THE LOW
PASSES STRONG POTENTIALLY NEAR WARNING WIND GUSTS WILL DEVELOP.
THESE WINDS WILL BE AFTER THE HEAVY SNOW MOVES THROUGH BUT SHOULD
STILL GIVE SOME BLOWING SNOW.
SOUTHERN MB/SK...WIDESPREAD SHOWERS FOR MUCH OF SOUTHERN
MANITOBA. THERE IS AN OUTSIDE SHOT OF SOME THUNDER ALONG WITH THESE
SHOWERS, BUT CHANCE IS SMALL ENOUGH TO HAVE LEFT IT OUT OF THE PUBLIC
FORECAST. SHOWERS WILL LINGER OVERNIGHT INTO SATURDAY MORNING AS THE
COLD FRONT STALLS OUT IN THE FAR SOUTHEASTERN CORNER OF MB. MODEST
PWAT VALUES INDICATE ACCUMULATIONS ON THE ORDER OF 5 TO 10 MM. BEHIND
THE PASSAGE OF THE COLD FRONT, TEMPERATURES WILL COOL TO HIGHS IN THE
UPPER SINGLE DIGITS TO LOW TEENS. HIGH PRESSURE WILL BUILD BACK INTO
THE EASTERN PRAIRIES ON SATURDAY, ALLOWING FOR ANOTHER GUSTY DAY OVER
THE RRV.
THERE IS A STATIONARY BAND OF RAIN NEAR WAWANESA WE ARE MONITORING.
AMOUNTS ARE APPROACHING 30 MM THROUGH THIS NARROW BAND. VERY LOCALLY
AMOUNTS COULD APPROACH 50 MM.
HIGH ARCTIC...A STEADY STREAM OF MOISTURE CONTINUES TO BRING SNOWFALL
TO GRISE FIORD TODAY. ALTHOUGH MODEL UNCERTAINTY IS HIGH, ANOTHER
5-10 CM OF SNOW IS POSSIBLE TODAY BEFORE THE SNOW SLOWLY TAPERS OFF
TONIGHT.
OUTLOOK...BLIZZARD OR NEAR-BLIZZARD CONDITIONS CAN BE EXPECTED IN THE
KIVALLIQ AND PARTS OF THE QIKIQTAALUK AS THE LOW MOVES THROUGH THE
KIVALLIQ INTO NORTHERN HUDSON BAY AND THEN TO THE FOXE BASIN.
END/PASPC
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