@ FOCN45 CWWG 201200 SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM PREDICTION CENTRE OF ENVIRONMENT CANADA AT 7:00 AM CDT WEDNESDAY MAY 20 2026. ALERTS IN EFFECT...NONE. OVERVIEW...00Z UPPER AIR ANALYSIS SHOWING A DEEP LOW OFF THE NORTHERN TIP OF LABRADOR WITH A TROUGH EXTENDING INTO NORTHEAST MANITOBA. SHORT WAVE CROSSING THE ALBERTA ELBOW. AT THE SURFACE, 06Z ANALYSIS PLACES A 1010 MB LOW NEAR FORT SMITH WITH A TROUGH SOUTHWARD ALONG THE AB/SK BORDER. RIDGE OF HIGH PRESSURE OVER WESTERN HUDSON BAY. SURFACE REFLECTION OF UPPER LOW OFF THE TIP OF LABRADOR. LOW PRESSURE SYSTEM OVER THE BOOTHIA PENINSULA MOVING EAST. DISCUSSION... ALBERTA...A POTENT VORTICITY CENTRE WILL GRADUALLY MOVE SOUTH SOUTHEAST ACROSS THE PROVINCE TODAY BRINGING WIDESPREAD SHOWERS AND THUNDERSTORMS FOR MUCH OF THE SOUTHERN AND EASTERN PARTS. WHERE THESE SHOWERS ARE MOST PERSISTENT, UPWARDS OF 10+ MM RAIN CAN BE EXPECTED. CONVECTION THAT DEVELOPS IN THE VICINITY OF THIS SYSTEM WILL LIKELY BE NON SEVERE ALTHOUGH THERE ALSO EXISTS THE POTENTIAL FOR FUNNEL CLOUDS, PARTICULARLY FOR AREAS EAST OF RED DEER AND NORTH TOWARD FORT MCMURRAY. OTHER HAZARDS COULD INCLUDE SMALL HAIL AND HEAVY DOWNPOURS. AS THINGS BEGIN TO CLEAR OUT A BIT TONIGHT IN ADVANCE OF AN UPPER RIDGE, WIDESPREAD FROST RISKS WILL MATERIALIZE ONCE AGAIN. THE GREATEST RISK FOR SUBFREEZING OVERNIGHT LOWS WILL LIKELY BE FROM SUNDRE NORTHWARD TO WHITECOURT. SASKATCHEWAN...TROUGH ROTATES EASTWARD THROUGH SK TODAY WITH SBCAPE VALUES CLIMBING INTO THE 500 TO 1000 J/KG RANGE GIVING A FEW AFTERNOON THUNDERSTORMS. SHEAR IS NEGLIGIBLE, SO SUPERCELLS ARE NOT EXPECTED. HOWEVER, AS THE SHORTWAVE IN ALBERTA MOVES INTO SK THIS AFTERNOON, 0-3 KM MLCAPE VALUES WILL APPROACH 200 J/KG, AND IN THE VICINITY OF THE TROUGH SUFFICIENT ENVIRONMENTAL VORTICITY MAY BE PRESENT FOR FUNNEL CLOUD DEVELOPMENT, WITH THE OUTSIDE CHANCE OF A LANDSPOUT TORNADO. BEST CHANCE OF THIS WOULD BE IN THE VICINITY AND SOUTHWEST OF HIGHWAY 11 BETWEEN CYXE AND CYQR, ALTHOUGH THE POSSIBILITY EXISTS ALL ALONG THE TROUGH. MANITOBA...AFOREMENTIONED SHORTWAVE MOVES INTO THE RED RIVER VALLEY OVERNIGHT, WITH ATTENDANT RISK OF NON-SEVERE THUNDERSTORMS. NU...MASSIVE AREAS OF STRATUS WITH OCCASIONAL FOG OVER BOTH BAFFIN AND HUDSON BAYS WILL MAKE FOR SOME FORECASTING CHALLENGES. LOW PRESSURE SYSTEM CROSSING NORTHERN BAFFIN WILL GIVE A FEW CM SNOW. END/FULTON/VAN LOCHEM