444  
FOCN45 CWWG 281300  
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM  
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CST TUESDAY  
JANUARY 28 2020.  
 
ALERTS IN EFFECT...EXTREME COLD WARNING FOR POND INLET, NU. FOG  
ADVISORIES FOR PORTIONS OF EAST-CENTRAL ALBERTA AND WESTERN  
SASKATCHEWAN.  
 
SYNOPTIC OVERVIEW...ALOFT THIS MORNING, AN UPPER LOW IS COMING  
ONSHORE NEAR VANCOUVER ISLAND WITH AN UPPER RIDGE TO ITS EAST  
RUNNING FROM IA/MT NORTH-NORTHWEST ALONG THE AB/B.C. BORDER. OVER  
THE PRAIRIES, AN UPPER TROUGH LIES FROM NW ALBERTA INTO SOUTHERN  
SASKATCHEWAN WHILE AN UPPER RIDGE SITS OVER MUCH OF MANITOBA WITH A  
HIGH CENTRE OVER THE THOMPSON/TADOUBLE LAKE REGION. IN THE ARCTIC, A  
SHARP SHORTWAVE IS OVER EASTERN HUDSON STRAIT AND UNGAVA BAY, PART  
OF A LONG-WAVE TROUGH EXTENDING FROM AN UPPER LOW OVER DAVIS STRAIT  
AND BAFFIN BAY. THE BROAD RIDGING EXTENDS ACROSS MUCH OF THE WESTERN  
ARCTIC, HOWEVER SAT PIX REVEAL A SERIES OF SHORTWAVES LIFTING  
NORTHEASTWARDS ACROSS YT AND THE NWT.  
 
AT THE SURFACE, A SLOW-MOVING BAROCLINIC ZONE IS DRAPED FROM NORTHERN  
B.C. ACROSS ALBERTA AND SOUTHERN SASKATCHEWAN. A WEAK LOW SITS ALONG  
THIS FEATURE NEAR SASKATOON (CYXE). A 1024 MB HIGH SITS OVER LAKE OF  
THE WOODS REGION WITH RIDGING EXTENDING ALONG A NORTH-SOUTH LINE. A  
SECOND HIGH SITS ALONG THIS RIDGE AXIS OVER WESTERN HUDSON BAY. IN  
THE ARCTIC, A 1004 MB LOW SITS JUST SOUTH OF CAMBRIDGE BAY (CYCB)  
WITH COLD FRONT SOUTHWEST AND WARM FRONT EAST-SOUTHEAST THROUGH THE  
KIVALLIQ. ANOTHER 1004 MB LOW IS MOVING PAST THE ENTRANCE TO  
FROBISHER BAY WITH AN OCCLUSION SWEEPING SOUTH-SOUTHWEST TO A  
COLLAPSING FRONTAL WAVE OVER SOUTHERN HUDSON BAY.  
 
DISCUSSION...  
 
PRAIRIES...LIGHT SNOW WILL CONTINUE ALONG THE SLOW-MOVING WARM FRONT  
TODAY IN SOUTHEASTERN SASKATCHEWAN AND SOUTHWESTERN MANITOBA.  
ACCUMULATIONS WILL BE LOW, THOUGH, WITH MOST AREAS SEEING LESS THAN 2  
CM. UNDERNEATH THE REST OF THE STRATUS DECK ACROSS THE EASTERN  
PRAIRIES, FLURRIES WILL CONTINUE TODAY.  
 
FOG AND MIST CONTINUES TO BE COMMON OVER THE PRAIRIES WITH THE LARGE  
STRATUS DECK AND LITTLE FLOW. SOME IMPROVEMENT EAST OF EDMONTON THIS  
AFTERNOON, OTHERWISE, NO SIGNIFICANT CHANGE IN THE NEXT 24 TO 36  
HOURS. PATCHY FREEZING DRIZZLE WILL REMAIN POSSIBLE UNDER THE  
ENTRENCHED STRATUS CLOUD IN SOUTHERN AND CENTRAL SASKATCHEWAN AND  
PORTIONS OF SOUTHERN MANITOBA.  
 
ARCTIC...EXTREME COLD WARNING WILL COME TO AN END IN POND INLET  
(CYIO) TODAY AS AN APPROACHING SYSTEM SPREADS CLOUD AND SLIGHTLY  
MILDER TEMPERATURES INTO THE REGION. THIS WILL PROVIDE A BREAK,  
HOWEVER TEMPERATURES WILL DROP AGAIN IN THE SECOND HALF OF THE WEEK  
WITH EXTREME WIND CHILLS ONCE AGAIN POSSIBLE.  
 
CAMBRIDGE BAY LOW WILL SPREAD LIGHT SNOW INTO THE NORTHERN KIVALLIQ,  
KITIKMEOT AND MELVILLE PENINSULA OVER THE NEXT 24 HOURS, THEN SPREAD  
ACROSS BAFFIN ISLAND ON WEDNESDAY. FOR MOST PLACES ACCUMULATIONS  
WILL REMAIN LIGHT IN THE 2 TO 4 CM RANGE. SNOW WILL INTENSIFY ON  
WEDNESDAY NIGHT OVER HUDSON STRAIT, HOWEVER, AND TOTAL SNOWFALL  
ACCUMULATIONS ALONG THE SOUTHERN COAST OF BAFFIN ISLAND MAY CLIMB  
INTO THE 5 TO 10 CM RANGE BY THURSDAY MORNING.  
 
AHEAD OF THE LOW, MODERATE SOUTHERLY WINDS WILL DEVELOP OVER THE  
KIVALLIQ AND KITIKMEOT TODAY AS THE WARM FRONT PUSHES EASTWARDS.  
SOME BLOWING SNOW WILL BE POSSIBLE, BUT NOT EXPECTING ANY BLIZZARD  
OR NEAR-BLIZZARD EVENTS.  
 
STRONG NORTHWESTERLY WINDS DEVELOP OVER THE KIVALLIQ ON WEDNESDAY  
WHICH WILL LIKELY BRING BLOWING SNOW TO THE COASTAL COMMUNITIES. WILL  
NEED TO SEE HOW THIS SYSTEM DEVELOPS, A NEAR-BLIZZARD MAY BE  
POSSIBLE.  
 
THE NEXT IN THE SERIES OF PACIFIC LOWS WILL MOVE INTO THE MACKENZIE  
ON WEDNESDAY WITH ANOTHER 2 TO 5 CM FORECAST.  
 
END/VROLIJK/NISKAARO  
 
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