FOCN45 CWWG 221200 SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CDT SUNDAY MARCH 22 2026. ALERTS IN EFFECT...FOG ADVISORY FOR PARTS OF CENTRAL AND SOUTHERN ALBERTA. SYNOPTIC OVERVIEW... ALOFT, AN UPPER LOW SITS OVER THE GULF OF ALASKA WITH A FLATTENING RIDGE TO THE EAST EXTENDING NORTHWARD OVER NORTHERN BC INTO SOUTHERN YUKON. TWO UPPER LOWS ARE OVER THE ARCTIC, ONE OVER MAINLAND NUNAVUT AND ANOTHER OVER DAVIS STRAIT, WHILE A LARGE UPPER TROUGH STRETCHES OVER LABRADOR THROUGH NEWFOUNDLAND. AT THE SURFACE, A 993 MB LOW IS OVER THE GULF OF ALASKA WITH A NEARBY LOW TO ITS SOUTHWEST. A RIDGE FROM THE EASTERN PACIFIC BUILDS INTO SOUTHWESTERN BC. ANOTHER RIDGE EXTENDS FROM NORTH DAKOTA NORTHEASTWARD THROUGH NORTHERN ONTARIO AND INTO NORTHERN QUEBEC. A WEAK LOW PRESSURE SYSTEM SITS OVER NORTHERN SOUTHAMPTON ISLAND. ADDITIONAL LOWS OF 1001 MB ARE LOCATED OVER SOUTHERN ONTARIO, AND 985 MB NORTHEAST OF NEWFOUNDLAND. AB/NRN SK...STRATUS AND FOG HAS FORMED FROM NORTH OF EDMONTON SOUTH TO ABOUT AIRDRIE. AIRPORT OBSERVATIONS, SATELLITE, AND ALBERTA 511 REPORTS SUGGEST FOG IS FAIRLY WIDESPREAD BUT WEBCAMS AREN'T QUITE INDICATING SUCH. THE FOG, BEING RADIATIVE AND HAVING DEVELOPED AFTER SOME SNOWMELT YESTERDAY CAUSED WATER POOLING, IS EXPECTED TO GET MORE EXTENSIVE UNTIL DAWN AND PROMPTLY BURN OFF A COUPLE HOURS AFTERWARDS, THOUGH THE STANDING WATER FREEZING COULD CAUSE FOG TO BE LESS EXTENSIVE THAN EXPECTED. A WEAK FRONTAL SYSTEM IS DEVELOPING IN THE PEACE REGION AND WILL TRACK EASTWARDS ACROSS NORTHERN ALBERTA TODAY AND NORTHERN SASKATCHEWAN TONIGHT. SOME ACC MAY BE EMBEDDED IN THIS SYSTEM ALLOWING FOR SOMEWHAT HIGHER SNOWFALL RATES IN CONVECTIVE SNOW SHOWERS, BUT AMOUNTS SHOULDN'T BE MORE THAN 2 TO 4 CENTIMETRES LOCALLY. SIMILAR AMOUNTS ARE EXPECTED OVER THE MOUNTAIN PARKS TODAY. SRN SK/MB...RELATIVELY BENIGN WEATHER IS EXPECTED FOR THE EASTERN PRAIRIES FOR THE REMAINDER OF THE WEEKEND. LOW LEVEL MOISTURE CONTINUES TO PRODUCE LIGHT SNOW AND PATCHY FREEZING DRIZZLE UNDERNEATH THE STRATUS DECK. A MORE SUBSTANTIAL DISTURBANCE IS FORECAST TO PASS THROUGH THE PRAIRIES SUNDAY NIGHT INTO MONDAY, BRINGING A FURTHER WINTRY MIX OF PRECIPITATION. HOWEVER, NO WARNINGS ARE EXPECTED AT THIS TIME. BAFFIN ISLAND/KIVALLIQ...THE LOW OVER SOUTHAMPTON ISLAND WILL CONTINUE MOVING TOWARD SOUTHERN BAFFIN ISLAND TODAY, BRINGING LIGHT SNOW. A GRADIENT WILL BEGIN TO DEVELOP OVER KIVALLIQ ON SUNDAY AFTERNOON, WITH A BUILDING HIGH OVER THE NORTHWEST TERRITORIES, WHICH MAY RESULT IN BLOWING SNOW IN THE REGION. CURRENTLY, THE IMPACTS APPEAR TO BE MINIMAL, AND WIDESPREAD WARNINGS ARE NOT ANTICIPATED. NONETHELESS, BLOWING SNOW WILL BE INCLUDED IN PUBLIC FORECASTS. WESTERN ARCTIC...QUIET WEATHER UNDER A RIDGE. A COLD WARNING WAS BRIEFLY OUT FOR SACHS HARBOUR LAST NIGHT WHILE SUSTAINED WINDS WERE NEAR 30 KM/H, BUT WITH WINDS LETTING UP IT WAS ENDED WITH THE MORNING ISSUE. THERE'S A REASONABLE CHANCE OF A COLD WARNING LATER BEING ISSUED FOR TONIGHT AT WEKWEETI, WHICH IS DIRECTLY UNDER THE RIDGE AND COULD SEE TEMPERATURES PLUNGE INTO THE MINUS 40S. LUTSEL K'E AND YELLOWKNIFE WILL ALSO HAVE COLD WIND CHILLS IN THE MID MINUS 40S. KITIKMEOT / HIGH ARCTIC... QUIET WEATHER IN A WEAK NORTHERLY FLOW WEST OF A RIDGE, THOUGH IT IS COLD AND A LITTLE BREEZY, AND SOME LOCATIONS ARE FLIRTING WITH REQUIRING COLD WARNINGS THIS MORNING. END/COLANGELO/BATE