909
WWCN15 CWWG 111629
YELLOW WATCH - SEVERE THUNDERSTORM
FOR SOUTHERN ALBERTA
ISSUED BY ENVIRONMENT CANADA
AT 10:29 A.M. MDT TUESDAY 11 AUGUST 2026.
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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:
=NEW= CITY OF CALGARY
=NEW= AIRDRIE - COCHRANE - OLDS - SUNDRE
=NEW= KANANASKIS - CANMORE
=NEW= NORDEGG - FORESTRY TRUNK ROAD HIGHWAY 734
=NEW= ROCKY MOUNTAIN HOUSE - CAROLINE.
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IMPACT LEVEL: MODERATE
FORECAST CONFIDENCE: HIGH
==DISCUSSION==
CONDITIONS ARE FAVOURABLE FOR THE DEVELOPMENT OF SEVERE
THUNDERSTORMS THAT MAY BE CAPABLE OF PRODUCING STRONG WIND GUSTS,
LARGE HAIL AND HEAVY RAIN.
THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND CONTINUE INTO THIS
EVENING.
DRIVING CONDITIONS MAY BE DIFFICULT. BE PREPARED FOR SEVERE WEATHER.
IF THREATENING WEATHER APPROACHES, TAKE COVER IN A BASEMENT OR
INTERIOR ROOM. IF OUTSIDE, PROTECT YOURSELF FROM FLYING DEBRIS AND
HAIL. WHEN THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) LIGHTNING
KILLS AND INJURES CANADIANS EVERY YEAR.
SEVERE THUNDERSTORM WATCHES ARE ISSUED WHEN CONDITIONS ARE
FAVOURABLE FOR THE DEVELOPMENT OF THUNDERSTORMS CAPABLE OF PRODUCING
DAMAGING HAIL, WIND OR RAIN.
PLEASE CONTINUE TO MONITOR ALERTS AND FORECASTS ISSUED BY
ENVIRONMENT CANADA. TO REPORT SEVERE WEATHER, SEND AN EMAIL TO
ABSTORM(AT)EC.GC.CA, CALL 1-800-239-0484 OR POST REPORTS ON SOCIAL
MEDIA USING (HASH)ABSTORM.
HTTP://WEATHER.GC.CA
END/PASPC
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