985
FOCN45 CWWG 251900
SIGNIFICANT WEATHER DISCUSSION ISSUED BY THE PRAIRIE AND ARCTIC STORM
PREDICTION CENTRE OF ENVIRONMENT CANADA AT 2:00 PM CDT FRIDAY
SEPTEMBER 25 2026.
ALERTS IN EFFECT...RAINFALL WARNINGS FOR PARTS OF NORTHEASTERN
ALBERTA, NORTHWESTERN SASKATCHEWAN AND SOUTHEASTERN NORTHWEST
TERRITORIES. FOG ADVISORY FOR THE NORTHWESTERN FOOTHILLS AREAS.
SYNOPTIC OVERVIEW...ALOFT, A TROUGH IS OVER THE WEST COAST WITH
RIDGING DOWNSTREAM, OVER THE PRAIRIES. AN UPPER LOW IS NEAR THE
NORTH POLE WITH A TROUGH SOUTHWARD THROUGH MAINLAND NUNAVUT. RIDGING
IS OVER BAFFIN ISLAND.
AT THE SURFACE, LOW PRESSURE IS DEEPENING OVER WASHINGTON STATE,
SOUTHERN BC, AND SOUTHERN ALBERTA. LOW PRESSURE IS NEAR CAMBRIDGE
BAY. A RIDGE SITS FROM NORTHERN BC THROUGH THE NORTHERN AND CENTRAL
PRAIRIES TO THE GREAT LAKES.
DISCUSSION...
WESTERN PRAIRIES...A LOW PRESSURE SYSTEM WILL BE BRINGING ACTIVE
WEATHER TO ALBERTA AND NORTHERN SASKATCHEWAN OVER THE NEXT 48 HOURS,
BRINGING RAINFALL, STRONG WIND AND THUNDERSTORMS TO THE REGION.
A BROAD SWATH OF RAIN IS FALLING OVER NORTHERN ALBERTA TODAY, AND
THIS WILL CONTINUE TO INTENSIFY THROUGH THE DAY AND INTO THIS
EVENING. RAINFALL AMOUNTS WILL BE HIGHEST IN THE FORT CHIPEWYAN
REGION, WHERE UPWARDS OF 60-90 MM IS EXPECTED BY SUNDAY MORNING. IN
URANIUM CITY, SK, ROUGHLY 60-80 MM IS EXPECTED. RAINFALL WARNINGS
HAVE BEEN ISSUED FOR THESE REGIONS, WHILE AMOUNTS OUTSIDE OF THIS
AREA WILL REMAIN BELOW WARNING CRITERIA.
THUNDERSTORM ACTIVITY IS EXPECTED MAINLY IN THE VICINITY OF THE LOW
AS IT MOVES ACROSS THE PRAIRIES. HOWEVER, THUNDERSTORMS ARE ALSO
POSSIBLE, AND HAVE BEEN ALREADY BEEN DEVELOPING TODAY, ALONG THE
COLD FRONT AND IN THE WARM SECTOR OF THE LOW. IN ALL CASES,
THUNDERSTORMS SHOULD REMAIN SUB SEVERE.
STRONG WINDS ARE EXPECTED BEHIND THE COLD FRONT, WITH GUSTS OF 70
KM/H IN THE FORECAST FROM KANANASKIS SOUTH TO THE US BORDER.
EASTERLY WINDS WITH GUSTS TO 60 KM/H TO THE NORTH OF THE LOW ARE
ALSO EXPECTED THIS EVENING AND OVERNIGHT ACROSS NORTHERN
SASKATCHEWAN AND NORTHEASTERN ALBERTA.
FINALLY, A FOG ADVISORY REMAINS IN EFFECT FOR AREAS FROM ROCKY
MOUNTAIN HOUSE AND NORTHWARD TOWARDS EDSON AND HINTON. CONDITIONS
SHOULD IMPROVE BY EARLY THIS AFTERNOON.
EASTERN PRAIRIES...THE FOG HAS LIFTED OVER SOUTHERN MANITOBA, AND
THE FOG ADVISORY HAS BEEN ENDED.
WESTERN SASKATCHEWAN WILL BE VERY WARM TODAY, WITH TEMPERATURES
AROUND 30, WHICH IS MORE THAN 10 DEGREES ABOVE AVERAGE FOR THIS TIME
OF YEAR.
WESTERN ARCTIC...THE LOW WHICH IS BRINGING RAIN TO THE NORTHERN
PRAIRIES TONIGHT AND SATURDAY WILL ALSO BRING HEAVY RAIN AND STRONG
WINDS TO REGIONS SOUTH AND EAST OF GREAT SLAVE LAKE. A RAINFALL
WARNING HAS BEEN ISSUED FOR FORT SMITH WHERE ROUGHLY 40-60 MM OF
RAIN IS EXPECTED BY SUNDAY MORNING. HOWEVER, CONFIDENCE IS NOT HIGH
ON THE HIGHER END OF THE PRECIPITATION RANGE BEING REALIZED AS
MODELS HAVE SHIFTED TO THE EAST WITH THE MAIN PRECIPITATION
CORRIDOR. IN ADDITION TO THE RAIN, GUSTS OF UP TO 80 KM/H ARE IN THE
FORECAST FOR THE LUTSEL K'E REGION. THIS AREA IS ALSO AT RISK FOR
SEEING SOME MODERATE SNOWFALL AS TEMPERATURES PLUMMET ON THE NORTH
SIDE OF THE LOW ON SATURDAY NIGHT.
EASTERN ARCTIC...THE EASTERN ARCTIC WILL BE PRETTY QUIET, TODAY. A
FEW CM OF SNOW ACCUMULATION IS LIKELY TONIGHT AT ARCTIC BAY.
HIGH ARCTIC...THE LOW WHICH BROUGHT A FEW CM OF SNOW TO RESOLUTE
LAST NIGHT WILL BRING 5-10 CM OF SNOW TO GRISE FIORD TODAY.
END/CARLSEN/MOODIE/GRIFFITH/GREENHOUGH
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