503
FOCN45 CWWG 021900
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 2:00 PM CDT TUESDAY
SEPTEMBER 2 2025.
ALERTS IN EFFECT...AIR QUALITY WARNINGS FOR PORTIONS OF THE NWT,
ALBERTA, AND SASKATCHEWAN. SPECIAL AIR QUALITY STATEMENT FOR
KUGLUKTUK. HEAT WARNING FOR JASPER.
SYNOPTIC OVERVIEW...THE 12Z UPPER ANALYSES REVEALED A
QUASI-STATIONARY LOW OVER BAFFIN ISLAND ALONG WITH A SHORT WAVE EAST
OF GREAT SLAVE LAKE, DIVING SOUTH INTO NORTHERN SASKATCHEWAN/
MANITOBA. A LOW OVER THE PACIFIC NORTHWEST, WITH A RIDGE TO THE EAST
OVER THE SOUTHERN BC/ALBERTA BORDER.
THE SURFACE ANALYSIS SHOWS A 1031 MB HIGH TO THE EAST OF GREAT SLAVE
LAKE WITH SPRAWLING RIDGE LINES EMANATING NORTH/SOUTH AND EAST/WEST
FROM THE HIGH. A BAROCLINC ZONE CURLS AROUND THE EDGE OF THE HIGH
THROUGH ONTARIO, AND THEN INTO THE NORTHERN PLAINS BEFORE WRAPING
BACK TO THE NORTHWEST ALONG THE ALBERTA FOOTHILLS. A 995 MB LOW SITS
OVER THE ARCTIC OCEAN WITH A WARM FRONT EXTENDING SOUTH FROM THE LOW,
ACROSS VICTORIA ISLAND AND THEN TOWARDS GREAT BEAR LAKE.
DISCUSSION...
MB/SK...COOLER TEMPERATURES WITH SCATTERED SHOWERS IN THE WAKE OF THE
COLD FRONT SCATTERED ACROSS BOTH MB/SK TODAY. WILDFIRE SMOKE WILL
CONTINUE TO BE AN ISSUE OVER PARTS OF WESTERN SASKATCHEWAN TODAY.
SMOKE WILL GRADUALLY THIN OUT OVER THE COMING DAYS IN SOME AREAS, BUT
A NEW THICKER PLUME OF SMOKE IS FORECAST TO ADVECT OVER THE ROCKIES
INTO SOUTHWESTERN SASKATCHEWAN THURSDAY.
LOOKING AHEAD TO THURSDAY, A LOW PRESSURE SYSTEM WILL DEVELOP IN THE
ARCTIC AND THEN SLIDE SOUTH INTO SOUTHERN SASKATCHEWAN/MANITOBA
THURSDAY. THIS SYSTEM WILL BRING AN AREA OF STEADY RAINFALL ALONG THE
MANITOBA/SASKATCHEWAN BORDER AND INTO SOUTHERN MANITOBA FOR MOST OF
THE DAY ON THURSDAY. RAIN WILL BEGIN IN NORTHERN MB/SK WEDNESDAY
NIGHT AND CONTINUE INTO THURSDAY AFTERNOON. EXPECTING 10-25 MM ALONG
THE BORDER BETWEEN THE TWO PROVINCES OVER A 24 HOUR PERIOD. STRONG
WINDS WILL ALSO DEVELOP OVER SOUTHEASTERN SK THURSDAY WITH WINDS
GUSTING TO 70 KM/H THURSDAY AFTERNOON.
AB...NORTHERLY WINDS HAVE PUSHED SMOKE ACROSS MUCH OF THE PROVINCE.
SOME AREAS MAY SEE IMPROVEMENT OVER THE NEXT 24 HOURS, HOWEVER
ANOTHER PLUME OF SMOKE IS EXPECTED TO MOVE IN FROM THE NORTH ON
WEDNESDAY. TEMPERATURES WILL BE COOLER TODAY IN MOST REGIONS, BEFORE
RISING BACK TOWARD 30 TOMORROW.
ARCTIC...SMOKE HAS ADVECTED TO THE NORTH COAST. A LOW WILL DEVELOP
AND TRACK ACROSS THE KITIKMEOT TONIGHT, BRINGING A CHANCE OF SHOWERS
AND PUSHING THE SMOKE BACK SOUTH.
GUSTY WINDS WITH MIXED PRECIPITATION OVER PARTS OF BAFFIN ISLAND
TODAY, OTHERWISE LITTLE WEATHER OF NOTE.
END/FULTON/ZIOLKOWSKI/GERGELY
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