910  
FOCN45 CWWG 211200  
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM  
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CDT SATURDAY MAY  
21 2022.  
 
ALERTS IN EFFECT...WIND WARNING FOR IQALUIT AND PANGNIRTUNG.  
 
SYNOPTIC OVERVIEW...ALOFT, ARCTIC VORTEX CENTRED OVER NORTHERN  
ARCTIC ARCHEPELEGO. COLD LOW NORTHEASTERN HUDSON BAY MOVING OVER  
SOUTHERN HUDSON BAY TONIGHT AND THEN COMBINING WITH ARCTIC VORTEX ON  
SUNDAY. GENERAL BROAD TROUGH OVER PRAIRIES GRADUALLY WEAKENING  
THROUGH THE WEEKEND.  
 
DISCUSSION...  
 
EASTERN PRAIRIES...SLIGHTLY UNSETTLED TODAY IN WAKE OF FRIDAYS  
FRONTAL PASSAGE. CLEARING THEN WIDESPREAD FROST TONIGHT.  
 
WESTERN PRAIRIES...WITH CONTINUED GRADUAL CLEARING AND A COOLER THAN  
SEASONAL AIR MASS IN PLACE, PATCHY FROST IS EXPECTED THROUGHOUT MUCH  
OF ALBERTA TONIGHT.  
 
ELSEWHERE, ISOLATED CONVECTIVE SHOWERS OR FLURRIES WILL PERSIST  
TODAY IN THE ROCKIES AND FOOTHILLS.  
 
WESTERN ARCTIC...A WEAK TROUGH MOVING SOUTH THROUGH THE NWT WILL  
BRING SOME RAIN TO THE MACKENZIE VALLEY TODAY. THERE IS ALSO A  
SLIGHT RISK OF SOME ISOLATED THUNDERSTORMS THIS AFTERNOON,  
PARTICULARLY TO THE WEST OF GREAT SLAVE LAKE.  
 
EASTERN ARCTIC...CAPTURED SURFACE LOW OVER QUEBEC WILL INTENSIFY  
TODAY AND MOVE OVER SOUTHERNMOST BAFFIN ISLAND THIS AFTERNOON,  
SLOWLY WEAKEN TONIGHT AND EXIT THRU DAVIS STRAIT SUNDAY. WIND THE  
MAIN CONCERN TODAY WITH IQALUIT, PANGNIRTUNG, AND TO A LESSER DEGREE  
KIMMURUT, PRIMED FOR DOWNSLOPE WINDS TODAY AS THE ASSOCIATED TROWAL  
WRAPS THROUGH THE AREA. IQALUIT AND PANGIRTUNG SHOULD SEE AT LEAST  
90 KM/H GUSTS BUT 100+ POSSIBLE. KINNGAIT IN THE STRONG SURFACE  
GRADIENT BUT NORTHERLY DIRECTION IS LESS FAVOURABLE FOR WIND EVENTS.  
THE TROWAL WILL BRING A BARRIER JET WIND TO CLYDE RIVER SUNDAY, AND  
A PROLONGED 60G80KM/H WIND AND FALLING SNOW GIVING NEAR BLIZZARD  
CONDITIONS. GRADIENT WINDS OVER SANIRAJAK TO BRING SOME BLOWING SNOW  
SUNDAY AS WELL.  
 
END/BAGGALEY/GRIFFITH  
 
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