WWCN15 CWWG 201636

YELLOW WATCH - SEVERE THUNDERSTORM

FOR SOUTHERN ALBERTA

ISSUED BY ENVIRONMENT CANADA

AT 10:36 A.M. MDT SATURDAY 20 JUNE 2026.

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YELLOW LEVEL WATCH - SEVERE THUNDERSTORM - FOR:

=NEW= CITY OF CALGARY

=NEW= OKOTOKS - HIGH RIVER - CLARESHOLM

=NEW= AIRDRIE - COCHRANE - OLDS - SUNDRE

=NEW= DRUMHELLER - THREE HILLS

=NEW= BROOKS - STRATHMORE - VULCAN

=NEW= KANANASKIS - CANMORE

=NEW= HANNA - CORONATION - OYEN

=NEW= MEDICINE HAT - BOW ISLAND - SUFFIELD

=NEW= CYPRESS HILLS PROVINCIAL PARK - FOREMOST

=NEW= LETHBRIDGE - TABER - MILK RIVER

=NEW= CARDSTON - FORT MACLEOD - MAGRATH

=NEW= CROWSNEST PASS - PINCHER CREEK - WATERTON LAKES NAT. PARK.



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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 ALONG THE FOOTHILLS EARLY THIS AFTERNOON 

AND MOVE EASTWARD TO THE SASKATCHEWAN BORDER BY THIS EVENING. SOME 

OF THESE THUNDERSTORMS MAY BECOME SEVERE. 



THE RISK OF SEVERE THUNDERSTORMS WILL END LATE THIS EVENING.



WHEN THUNDER ROARS, GO INDOORS(EXCLAMATION MARK) LIGHTNING KILLS AND 

INJURES CANADIANS EVERY YEAR. LARGE HAIL CAN CAUSE SIGNIFICANT 

DAMAGE AND INJURY. 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 X USING 

(HASH)ABSTORM.



HTTP://WEATHER.GC.CA



END/PASPC