453
FPCN15 CWWG 181030
FORECASTS FOR SOUTHERN ALBERTA AND THE MOUNTAIN PARKS ISSUED BY
ENVIRONMENT CANADA AT 5:00 A.M. MDT TUESDAY 18 AUGUST 2026 FOR TODAY
AND WEDNESDAY.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 11:00 A.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..SUNNY. BECOMING A MIX OF SUN AND CLOUD THIS AFTERNOON.
HIGH 27. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY. BECOMING CLEAR NEAR MIDNIGHT. LOW 11.
WEDNESDAY..SUNNY. WIND BECOMING EAST 20 KM/H NEAR NOON. HIGH 26.
HUMIDEX 28. UV INDEX 7 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 THUNDERSTORM. LOCAL SMOKE. WIND BECOMING
WEST 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 26. HUMIDEX 31. UV
INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS EVENING
THEN CLEAR. RISK OF A THUNDERSTORM THIS EVENING. LOCAL SMOKE EARLY
THIS EVENING. WIND WEST 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS
EVENING. LOW 10.
WEDNESDAY..SUNNY IN THE MORNING AND EARLY IN THE AFTERNOON THEN A MIX
OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON.
RISK OF A THUNDERSTORM IN THE AFTERNOON. HIGH 26. HUMIDEX 31. UV
INDEX 7 OR HIGH.
AIRDRIE - COCHRANE - OLDS - SUNDRE.
TODAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD THIS MORNING. HIGH 25.
HUMIDEX 26. UV INDEX 6 OR HIGH.
TONIGHT..CLEARING LATE THIS EVENING. LOW 6.
WEDNESDAY..SUNNY. HIGH 25. HUMIDEX 26. UV INDEX 7 OR HIGH.
DRUMHELLER - THREE HILLS.
TODAY..MAINLY SUNNY. WIND BECOMING SOUTHWEST 20 KM/H GUSTING TO 40
NEAR NOON. HIGH 30. UV INDEX 6 OR HIGH.
TONIGHT..A FEW CLOUDS. LOW 11.
WEDNESDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD IN THE AFTERNOON.
WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 30.
HUMIDEX 31. UV INDEX 7 OR HIGH.
BROOKS - STRATHMORE - VULCAN.
TODAY..MAINLY SUNNY. LOCAL SMOKE. WIND BECOMING WEST 20 KM/H GUSTING
TO 40 THIS AFTERNOON. HIGH 30. HUMIDEX 33. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY. LOCAL SMOKE EARLY THIS EVENING. WIND WEST
20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 11.
WEDNESDAY..MAINLY SUNNY. HIGH 30. HUMIDEX 32. UV INDEX 7 OR HIGH.
KANANASKIS - CANMORE.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS THIS
AFTERNOON WITH RISK OF A THUNDERSTORM. LOCAL SMOKE. WIND BECOMING
WEST 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 26. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS EVENING
THEN CLEAR. RISK OF A THUNDERSTORM THIS EVENING. WIND WEST 20 KM/H
GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 12.
WEDNESDAY..SUNNY IN THE MORNING AND EARLY IN THE AFTERNOON THEN A MIX
OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON.
RISK OF A THUNDERSTORM IN THE AFTERNOON. HIGH 27. UV INDEX 7 OR
HIGH.
BANFF NATIONAL PARK
HIGHWAY 93 - LAKE LOUISE TO SASKATCHEWAN RIVER CROSSING.
TODAY..A MIX OF SUN AND CLOUD. LOCAL SMOKE THIS MORNING AND EARLY
THIS AFTERNOON. WIND BECOMING SOUTHWEST 20 KM/H GUSTING TO 40 NEAR
NOON. HIGH 24. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY. BECOMING CLEAR THIS EVENING. WIND SOUTHWEST
20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 8.
WEDNESDAY..SUNNY. HIGH 27. UV INDEX 7 OR HIGH.
HIGHWAY 93 - JASPER TO SASKATCHEWAN RIVER CROSSING
JASPER NATIONAL PARK.
TODAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTHWEST 20 KM/H
GUSTING TO 40 NEAR NOON. HIGH 27. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY. BECOMING CLEAR THIS EVENING. WIND SOUTHWEST
20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 9.
WEDNESDAY..SUNNY. HIGH 28. UV INDEX 6 OR HIGH.
NORDEGG - FORESTRY TRUNK ROAD HIGHWAY 734.
TODAY..A MIX OF SUN AND CLOUD. HIGH 23. UV INDEX 6 OR HIGH.
TONIGHT..A FEW CLOUDS. LOW 6.
WEDNESDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS IN
THE AFTERNOON WITH RISK OF A THUNDERSTORM. HIGH 22. UV INDEX 6 OR
HIGH.
ROCKY MOUNTAIN HOUSE - CAROLINE.
TODAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD THIS MORNING. HIGH 24.
HUMIDEX 25. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY. LOW 8.
WEDNESDAY..SUNNY. WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 NEAR
NOON. HIGH 24. HUMIDEX 26. UV INDEX 6 OR HIGH.
RED DEER - PONOKA - INNISFAIL - STETTLER.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS EARLY
THIS MORNING WITH RISK OF A THUNDERSTORM. WIND BECOMING SOUTHWEST
20 KM/H GUSTING TO 40 NEAR NOON. HIGH 25. HUMIDEX 27. UV INDEX 6 OR
HIGH.
TONIGHT..PARTLY CLOUDY. CLEARING BEFORE MORNING. WIND NORTH 20 KM/H
GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 9.
WEDNESDAY..SUNNY. WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 NEAR
NOON. HIGH 25. HUMIDEX 27. UV INDEX 6 OR HIGH.
HANNA - CORONATION - OYEN.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS EARLY
THIS MORNING AND LATE THIS AFTERNOON. RISK OF A THUNDERSTORM. FOG
PATCHES DISSIPATING THIS MORNING. WIND BECOMING SOUTH 20 KM/H
GUSTING TO 40 NEAR NOON. HIGH 28. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS EVENING
AND RISK OF A THUNDERSTORM. CLEARING OVERNIGHT. WIND NORTHWEST
20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 11.
WEDNESDAY..SUNNY. WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 NEAR
NOON. HIGH 27. HUMIDEX 28. UV INDEX 7 OR HIGH.
MEDICINE HAT - BOW ISLAND - SUFFIELD.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS EARLY
THIS MORNING AND LATE THIS AFTERNOON. RISK OF A THUNDERSTORM LATE
THIS AFTERNOON. LOCAL SMOKE. WIND BECOMING WEST 20 KM/H GUSTING TO
40 NEAR NOON. HIGH 30. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A THUNDERSTORM. LOCAL SMOKE THIS EVENING. WIND WEST
20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 13.
WEDNESDAY..SUNNY. HIGH 30. HUMIDEX 32. UV INDEX 7 OR HIGH.
CYPRESS HILLS PROVINCIAL PARK - FOREMOST.
TODAY..A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS. RISK
OF A THUNDERSTORM. LOCAL SMOKE. WIND BECOMING NORTHWEST 20 KM/H
GUSTING TO 40 THIS AFTERNOON. HIGH 29. HUMIDEX 31. UV INDEX 6 OR
HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS
EVENING. BECOMING CLEAR OVERNIGHT. RISK OF A THUNDERSTORM THIS
EVENING. LOCAL SMOKE THIS EVENING AND AFTER MIDNIGHT. WIND NORTHWEST
20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 13.
WEDNESDAY..SUNNY. WIND BECOMING NORTHWEST 20 KM/H GUSTING TO 40 NEAR
NOON. HIGH 30. UV INDEX 7 OR HIGH.
LETHBRIDGE - TABER - MILK RIVER.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS EARLY
THIS MORNING AND LATE THIS AFTERNOON. RISK OF A THUNDERSTORM. LOCAL
SMOKE. WIND BECOMING WEST 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 29.
HUMIDEX 30. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A THUNDERSTORM. LOCAL SMOKE THIS EVENING AND AFTER
MIDNIGHT. WIND WEST 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS
EVENING. LOW 11.
WEDNESDAY..SUNNY. WIND BECOMING WEST 20 KM/H GUSTING TO 40 NEAR NOON.
HIGH 29. HUMIDEX 31. UV INDEX 7 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 THUNDERSTORM. LOCAL SMOKE. WIND BECOMING
WEST 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 28. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS EVENING
THEN CLEAR. RISK OF A THUNDERSTORM THIS EVENING. LOCAL SMOKE. WIND
WEST 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 14.
WEDNESDAY..SUNNY IN THE MORNING AND EARLY IN THE AFTERNOON THEN A MIX
OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON.
RISK OF A THUNDERSTORM IN THE AFTERNOON. WIND BECOMING WEST 20 KM/H
GUSTING TO 40 NEAR NOON. HIGH 29. UV INDEX 7 OR HIGH.
CROWSNEST PASS - PINCHER CREEK - WATERTON LAKES NAT. PARK.
TODAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS THIS
AFTERNOON WITH RISK OF A THUNDERSTORM. LOCAL SMOKE. WIND BECOMING
WEST 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 27. UV INDEX 6 OR HIGH.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS THIS EVENING
THEN CLEAR. RISK OF A THUNDERSTORM THIS EVENING. LOCAL SMOKE. WIND
WEST 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 10.
WEDNESDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD IN THE AFTERNOON.
LOCAL SMOKE. WIND BECOMING WEST 20 KM/H GUSTING TO 40 NEAR NOON.
HIGH 29. HUMIDEX 30. UV INDEX 7 OR HIGH.
END
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