181
FPCN15 CWWG 122141
FORECASTS FOR SOUTHERN ALBERTA AND THE MOUNTAIN PARKS ISSUED BY
ENVIRONMENT CANADA AT 4:00 P.M. MDT WEDNESDAY 12 AUGUST 2026 FOR
TONIGHT THURSDAY AND THURSDAY NIGHT.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. MDT THURSDAY.
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MAJOR REFERENCE ELEVATIONS:
BANFF: 1384 METRES.
LAKE LOUISE: 1750 METRES.
HIGHWAY 93 - BOW SUMMIT: 2068 METRES.
HIGHWAY 93 - SUNWAPTA PASS: 2034 METRES.
COLUMBIA ICEFIELDS VISITORS CENTRE: 2006 METRES.
JASPER: 1061 METRES.
CANMORE: 1350 METRES.
HWY 40 - HIGHWOOD PASS: 2206 METRES.
PINCHER CREEK: 1030 METRES.
WATERTON: 1280 METRES.
CROWSNEST PASS: 1300 METRES.
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CITY OF CALGARY.
TONIGHT..SHOWERS. RISK OF A THUNDERSTORM THIS EVENING. LOCAL AMOUNT 5
TO 10 MM. LOW 10.
THURSDAY..RAIN. LOCAL AMOUNT 10 TO 20 MM. HIGH 12. UV INDEX 1 OR LOW.
THURSDAY NIGHT..RAIN. LOCAL AMOUNT 5 MM. LOW 10.
OKOTOKS - HIGH RIVER - CLARESHOLM.
TONIGHT..SHOWERS. RISK OF A THUNDERSTORM THIS EVENING. LOCAL AMOUNT
10 TO 20 MM. LOW 11.
THURSDAY..RAIN AT TIMES HEAVY. LOCAL AMOUNT 20 TO 30 MM. HIGH 14. UV
INDEX 1 OR LOW.
THURSDAY NIGHT..RAIN. LOCAL AMOUNT 5 TO 10 MM. LOW 10.
AIRDRIE - COCHRANE - OLDS - SUNDRE.
TONIGHT..SHOWERS. RISK OF A THUNDERSTORM THIS EVENING. LOCAL AMOUNT 5
TO 10 MM. LOW 10.
THURSDAY..SHOWERS. LOCAL AMOUNT 10 TO 20 MM. HIGH 12. UV INDEX 2 OR
LOW.
THURSDAY NIGHT..SHOWERS. LOW 8.
DRUMHELLER - THREE HILLS.
TONIGHT..MAINLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM THIS EVENING. LOW 12.
THURSDAY..SHOWERS. LOCAL AMOUNT 5 TO 10 MM. HIGH 16. UV INDEX 2 OR
LOW.
THURSDAY NIGHT..SHOWERS. LOCAL AMOUNT 5 MM. LOW 12.
BROOKS - STRATHMORE - VULCAN.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. SHOWERS
BEGINNING OVERNIGHT. RISK OF A THUNDERSTORM THIS EVENING. LOW 11.
THURSDAY..SHOWERS. LOCAL AMOUNT 10 TO 20 MM. HIGH 16. UV INDEX 2 OR
LOW.
THURSDAY NIGHT..RAIN. LOCAL AMOUNT 5 MM. LOW 10.
KANANASKIS - CANMORE.
TONIGHT..SHOWERS. RISK OF A THUNDERSTORM THIS EVENING. LOCAL AMOUNT
10 TO 20 MM. LOW 6.
THURSDAY..RAIN AT TIMES HEAVY. LOCAL AMOUNT 20 TO 30 MM. HIGH 12. UV
INDEX 1 OR LOW.
THURSDAY NIGHT..RAIN. LOCAL AMOUNT 5 TO 10 MM. LOW 7.
BANFF NATIONAL PARK
HIGHWAY 93 - LAKE LOUISE TO SASKATCHEWAN RIVER CROSSING.
TONIGHT..PARTLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM THIS EVENING. LOW 8.
THURSDAY..SHOWERS. HIGH 12. UV INDEX 2 OR LOW.
THURSDAY NIGHT..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. LOW 7.
HIGHWAY 93 - JASPER TO SASKATCHEWAN RIVER CROSSING
JASPER NATIONAL PARK.
TONIGHT..PARTLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM THIS EVENING. WIND NORTHEAST 20 KM/H GUSTING TO 40
BECOMING LIGHT NEAR MIDNIGHT. LOW 10.
THURSDAY..MAINLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. HIGH 16.
UV INDEX 4 OR MODERATE.
THURSDAY NIGHT..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS IN THE
EVENING AND AFTER MIDNIGHT. LOW 8.
NORDEGG - FORESTRY TRUNK ROAD HIGHWAY 734.
TONIGHT..CLOUDY. 60 PERCENT CHANCE OF SHOWERS EARLY THIS EVENING.
SHOWERS BEGINNING EARLY THIS EVENING. RISK OF A THUNDERSTORM THIS
EVENING AND AFTER MIDNIGHT. LOCAL AMOUNT 10 MM. LOW 6.
THURSDAY..SHOWERS. LOCAL AMOUNT 5 TO 10 MM. HIGH 11. UV INDEX 2 OR
LOW.
THURSDAY NIGHT..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. LOW PLUS 3.
ROCKY MOUNTAIN HOUSE - CAROLINE.
TONIGHT..CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS EVENING.
SHOWERS BEGINNING EARLY THIS EVENING. RISK OF A THUNDERSTORM THIS
EVENING AND AFTER MIDNIGHT. LOCAL AMOUNT 5 TO 10 MM. LOW 9.
THURSDAY..SHOWERS. LOCAL AMOUNT 5 TO 10 MM. HIGH 15. UV INDEX 2 OR
LOW.
THURSDAY NIGHT..MAINLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS.
LOW 8.
RED DEER - PONOKA - INNISFAIL - STETTLER.
TONIGHT..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS AND RISK OF A
THUNDERSTORM. LOW 10.
THURSDAY..SHOWERS. RISK OF A THUNDERSTORM IN THE AFTERNOON. LOCAL
AMOUNT 15 TO 25 MM. HIGH 14. UV INDEX 2 OR LOW.
THURSDAY NIGHT..SHOWERS. RISK OF A THUNDERSTORM IN THE EVENING.
LOW 9.
HANNA - CORONATION - OYEN.
TONIGHT..MAINLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM THIS EVENING. LOW 10.
THURSDAY..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM IN THE AFTERNOON. HIGH 15. UV INDEX 2 OR LOW.
THURSDAY NIGHT..RAIN. RISK OF A THUNDERSTORM IN THE EVENING. LOCAL
AMOUNT 10 TO 20 MM. LOW 10.
MEDICINE HAT - BOW ISLAND - SUFFIELD.
TONIGHT..SHOWERS. RISK OF A THUNDERSTORM THIS EVENING. LOW 13.
THURSDAY..RAIN. LOCAL AMOUNT 10 TO 20 MM. HIGH 16. UV INDEX 1 OR LOW.
THURSDAY NIGHT..RAIN. LOCAL AMOUNT 10 TO 20 MM. LOW 12.
CYPRESS HILLS PROVINCIAL PARK - FOREMOST.
TONIGHT..CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS. RAIN BEGINNING
OVERNIGHT. RISK OF A THUNDERSTORM THIS EVENING. WIND NORTH 20 KM/H
GUSTING TO 40 BECOMING LIGHT OVERNIGHT. LOW 12.
THURSDAY..RAIN. LOCAL AMOUNT 10 TO 20 MM. HIGH 16. UV INDEX 1 OR LOW.
THURSDAY NIGHT..RAIN ENDING NEAR MIDNIGHT THEN CLOUDY. LOW 12.
LETHBRIDGE - TABER - MILK RIVER.
TONIGHT..SHOWERS. RISK OF A THUNDERSTORM THIS EVENING. LOCAL AMOUNT
10 MM. WIND NORTH 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING.
LOW 10.
THURSDAY..RAIN. LOCAL AMOUNT 10 TO 20 MM. HIGH 13. UV INDEX 1 OR LOW.
THURSDAY NIGHT..PERIODS OF RAIN. LOW 10.
CARDSTON - FORT MACLEOD - MAGRATH.
TONIGHT..SHOWERS. RISK OF A THUNDERSTORM THIS EVENING. LOCAL AMOUNT
10 TO 15 MM. WIND NORTH 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS
EVENING. LOW 9.
THURSDAY..RAIN. LOCAL AMOUNT 20 TO 30 MM. HIGH 12. UV INDEX 1 OR LOW.
THURSDAY NIGHT..PERIODS OF RAIN. LOW 8.
CROWSNEST PASS - PINCHER CREEK - WATERTON LAKES NAT. PARK.
TONIGHT..SHOWERS. RISK OF A THUNDERSTORM THIS EVENING. LOCAL AMOUNT
10 TO 20 MM. LOW 9.
THURSDAY..RAIN AT TIMES HEAVY. LOCAL AMOUNT 20 TO 30 MM. HIGH 12. UV
INDEX 1 OR LOW.
THURSDAY NIGHT..RAIN. LOCAL AMOUNT 5 TO 10 MM. LOW 9.
END
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