662
FPCN15 CWWG 171817 AAA
UPDATED FORECASTS FOR SOUTHERN ALBERTA AND THE MOUNTAIN PARKS ISSUED
BY ENVIRONMENT CANADA AT 12:17 P.M. MDT MONDAY 17 AUGUST 2026 FOR
TODAY AND TUESDAY.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 4:00 P.M. MDT.
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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.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE THIS
AFTERNOON WITH RISK OF A SEVERE THUNDERSTORM. LOCAL SMOKE. HIGH 24.
UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS EVENING
THEN CLEAR. RISK OF A SEVERE THUNDERSTORM THIS EVENING. LOW 10.
TUESDAY..SUNNY. INCREASING CLOUDINESS IN THE AFTERNOON. HIGH 27. UV
INDEX 6 OR HIGH.
OKOTOKS - HIGH RIVER - CLARESHOLM.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE THIS
AFTERNOON WITH RISK OF A SEVERE THUNDERSTORM. LOCAL SMOKE. HIGH 23.
HUMIDEX 25. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A SEVERE THUNDERSTORM. LOCAL SMOKE. LOW 9.
TUESDAY..SUNNY IN THE MORNING AND EARLY IN THE AFTERNOON THEN A MIX
OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS LATE IN THE
AFTERNOON. RISK OF A THUNDERSTORM LATE IN THE AFTERNOON. LOCAL
SMOKE. HIGH 27. HUMIDEX 31. UV INDEX 6 OR HIGH.
AIRDRIE - COCHRANE - OLDS - SUNDRE.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE THIS
AFTERNOON WITH RISK OF A SEVERE THUNDERSTORM. HIGH 23. UV INDEX 6 OR
HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS
EVENING. BECOMING CLEAR OVERNIGHT. RISK OF A SEVERE THUNDERSTORM
THIS EVENING. LOW PLUS 5.
TUESDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. HIGH 25.
UV INDEX 5 OR MODERATE.
BROOKS - STRATHMORE - VULCAN.
TODAY..SUNNY EARLY THIS AFTERNOON THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS LATE THIS AFTERNOON. RISK OF A SEVERE
THUNDERSTORM LATE THIS AFTERNOON. HIGH 25. HUMIDEX 27. UV INDEX 6 OR
HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS
EVENING. BECOMING CLEAR OVERNIGHT. RISK OF A SEVERE THUNDERSTORM
THIS EVENING. LOW 9.
TUESDAY..SUNNY. LOCAL SMOKE. HIGH 30. HUMIDEX 32. UV INDEX 6 OR HIGH.
KANANASKIS - CANMORE.
TODAY..SUNNY EARLY THIS AFTERNOON THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS. RISK OF A SEVERE THUNDERSTORM THIS
AFTERNOON. LOCAL SMOKE. HIGH 25. UV INDEX 5 OR MODERATE.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING. BECOMING CLEAR OVERNIGHT. RISK OF A SEVERE THUNDERSTORM
EARLY THIS EVENING. LOCAL SMOKE. LOW 8.
TUESDAY..SUNNY EARLY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS LATE IN THE AFTERNOON. RISK OF A
THUNDERSTORM LATE IN THE AFTERNOON. LOCAL SMOKE. HIGH 26. UV INDEX 6
OR HIGH.
MEDICINE HAT - BOW ISLAND - SUFFIELD.
TODAY..SUNNY EARLY THIS AFTERNOON THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS LATE THIS AFTERNOON. RISK OF A SEVERE
THUNDERSTORM LATE THIS AFTERNOON. HIGH 26. HUMIDEX 27. UV INDEX 6 OR
HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS EVENING
AND RISK OF A SEVERE THUNDERSTORM. CLEARING LATE THIS EVENING.
LOW 10.
TUESDAY..SUNNY IN THE MORNING AND EARLY IN THE AFTERNOON THEN A MIX
OF SUN AND CLOUD WITH 60 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON.
RISK OF A THUNDERSTORM IN THE AFTERNOON. HIGH 30. UV INDEX 6 OR
HIGH.
CYPRESS HILLS PROVINCIAL PARK - FOREMOST.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE THIS
AFTERNOON WITH RISK OF A SEVERE THUNDERSTORM. HIGH 26. HUMIDEX 28.
UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A SEVERE THUNDERSTORM. WIND NORTHEAST 20 KM/H BECOMING
LIGHT NEAR MIDNIGHT. LOW 10.
TUESDAY..A MIX OF SUN AND CLOUD. 60 PERCENT CHANCE OF SHOWERS IN THE
AFTERNOON WITH RISK OF A THUNDERSTORM. LOCAL SMOKE. WIND BECOMING
SOUTH 20 KM/H NEAR NOON. HIGH 28. HUMIDEX 30. UV INDEX 6 OR HIGH.
LETHBRIDGE - TABER - MILK RIVER.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE THIS
AFTERNOON WITH RISK OF A SEVERE THUNDERSTORM. HIGH 25. HUMIDEX 27.
UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS EVENING
AND RISK OF A SEVERE THUNDERSTORM. CLEARING LATE THIS EVENING.
LOW 9.
TUESDAY..SUNNY IN THE MORNING AND EARLY IN THE AFTERNOON THEN A MIX
OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS LATE IN THE
AFTERNOON. RISK OF A THUNDERSTORM LATE IN THE AFTERNOON. LOCAL
SMOKE. WIND BECOMING WEST 20 KM/H NEAR NOON. HIGH 28. HUMIDEX 30. UV
INDEX 6 OR HIGH.
CARDSTON - FORT MACLEOD - MAGRATH.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE THIS
AFTERNOON WITH RISK OF A SEVERE THUNDERSTORM. LOCAL SMOKE. HIGH 24.
HUMIDEX 25. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A SEVERE THUNDERSTORM. LOCAL SMOKE. LOW 9.
TUESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE IN
THE AFTERNOON WITH RISK OF A THUNDERSTORM. LOCAL SMOKE. HIGH 27. UV
INDEX 6 OR HIGH.
CROWSNEST PASS - PINCHER CREEK - WATERTON LAKES NAT. PARK.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE THIS
AFTERNOON WITH RISK OF A SEVERE THUNDERSTORM. LOCAL SMOKE. WIND WEST
20 KM/H. HIGH 24. HUMIDEX 26. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS EVENING
AND RISK OF A SEVERE THUNDERSTORM. CLEARING LATE THIS EVENING. LOCAL
SMOKE. WIND WEST 20 KM/H BECOMING LIGHT THIS EVENING. LOW 9.
TUESDAY..SUNNY IN THE MORNING AND EARLY IN THE AFTERNOON THEN A MIX
OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS LATE IN THE
AFTERNOON. RISK OF A THUNDERSTORM LATE IN THE AFTERNOON. LOCAL
SMOKE. WIND BECOMING WEST 20 KM/H IN THE MORNING THEN INCREASING TO
40 GUSTING TO 60 IN THE AFTERNOON. HIGH 27. HUMIDEX 28. UV INDEX 6
OR HIGH.
REMAINDER UNCHANGED.
END
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