136
FPCN15 CWWG 220143 AAA
UPDATED FORECASTS FOR SOUTHERN ALBERTA AND THE MOUNTAIN PARKS ISSUED
BY ENVIRONMENT CANADA AT 7:41 P.M. MDT THURSDAY 21 MAY 2026 FOR
TONIGHT FRIDAY AND FRIDAY NIGHT.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. MDT FRIDAY.
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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..PARTLY CLOUDY. WIND SOUTH 20 KM/H BECOMING LIGHT LATE THIS
EVENING. LOW 6.
FRIDAY..A MIX OF SUN AND CLOUD. 30 PERCENT CHANCE OF SHOWERS LATE IN
THE AFTERNOON WITH RISK OF A THUNDERSTORM. HIGH 18. UV INDEX 6 OR
HIGH.
FRIDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY IN
THE EVENING WITH RISK OF A THUNDERSTORM. LOW 7.
OKOTOKS - HIGH RIVER - CLARESHOLM.
TONIGHT..PARTLY CLOUDY. BECOMING CLEAR OVERNIGHT. WIND SOUTHEAST
20 KM/H GUSTING TO 40 BECOMING LIGHT LATE THIS EVENING. LOW PLUS 3
WITH RISK OF FROST.
FRIDAY..SUNNY EARLY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON. RISK OF A
THUNDERSTORM IN THE AFTERNOON. HIGH 21. UV INDEX 6 OR HIGH.
FRIDAY NIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY
IN THE EVENING. BECOMING CLEAR OVERNIGHT. RISK OF A THUNDERSTORM
EARLY IN THE EVENING. LOW 6.
BANFF NATIONAL PARK
HIGHWAY 93 - LAKE LOUISE TO SASKATCHEWAN RIVER CROSSING.
TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING. LOW PLUS 1.
FRIDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. HIGH 17. UV
INDEX 6 OR HIGH.
FRIDAY NIGHT..A FEW CLOUDS. LOW PLUS 3.
LETHBRIDGE - TABER - MILK RIVER.
TONIGHT..CLEAR. LOW PLUS 4 WITH RISK OF FROST.
FRIDAY..SUNNY. A MIX OF SUN AND CLOUD LATE IN THE AFTERNOON WITH
30 PERCENT CHANCE OF SHOWERS. HIGH 22. UV INDEX 6 OR HIGH.
FRIDAY NIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY
IN THE EVENING. CLEARING IN THE EVENING. WIND SOUTHWEST 20 KM/H
BECOMING LIGHT NEAR MIDNIGHT. LOW 6.
CARDSTON - FORT MACLEOD - MAGRATH.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY NEAR MIDNIGHT. LOW PLUS 4 WITH
RISK OF FROST.
FRIDAY..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. HIGH 18. UV
INDEX 6 OR HIGH.
FRIDAY NIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY
IN THE EVENING AND RISK OF A THUNDERSTORM. CLEARING LATE IN THE
EVENING. LOW 8.
CROWSNEST PASS - PINCHER CREEK - WATERTON LAKES NAT. PARK.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING. BECOMING CLEAR OVERNIGHT. WIND SOUTHWEST 20 KM/H GUSTING TO
40 BECOMING LIGHT NEAR MIDNIGHT. LOW PLUS 3.
FRIDAY..SUNNY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH
30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON. HIGH 19. UV INDEX 6
OR HIGH.
FRIDAY NIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY
IN THE EVENING. CLEARING IN THE EVENING. LOW 6.
REMAINDER UNCHANGED.
END
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