Environment Canada launches new alert system for extreme weather
Traffic moves northbound on Alberta's Highway 2 near Didsbury as a storm sweeps the region
Parts of southern Alberta under severe thunderstorm warning
New, more precise weather alerts in Canada
On the same day that Environment and Climate Change Canada (ECCC) introduced its new weather alert system, it was put to the test during a severe storm in southern Alberta.
On Tuesday afternoon, an intense storm system brought high winds, heavy rain and loonie to golf ball-sized hail down on the town of Claresholm, a community about an hour and a half south of Calgary.
Residents in the area told CTV News there is widespread damage throughout the community, including broken windows, dented vehicles and damaged siding on many homes.
Later in the evening, other storms brought more hail to other Alberta towns, such as Didsbury, north of Calgary, where hail fell like snow and caused slowdowns on the QEII highway.
No injuries have been reported because of the severe weather.
Loonie to golf ball-sized hail hammers homes, vehicles in Claresholm, Alta. Large hailstones fell in the town of Claresholm on Aug. 11, 2026, causing widespread damage to homes, vehicles and fields. (Supplied/X/Dave Mur)
ECCC’s new weather alert
If news of the storm comes as a surprise some Albertans, it could be because of a different alert system that came online on Tuesday.
ECCC modified its weather emergency alert plan to focus on smaller targeted areas — those in direct threat of thunderstorms or tornadoes.
The agency says it’s supposed to cut down on what it calls “alert fatigue.”
Storm chasers say the new strategy will help make everyone safer.
“If you got 15 warnings a year and one time you get a storm, it’s human nature to just start ignoring them,” said Kyle Hetherington.
“If you get one warning and it hits, the next time you get one, you’re absolutely going to take precautions.”
The United States has also been using the system for years and scientists there say it’s had a positive impact.
“People that are within, say, a half an hour or a hour of the storm, depending on how fast its traveling, they would actually have the warnings go out just for that localized area, as opposed to a whole bunch of people getting the warning,” said John Hanesiak, a professor of atmospheric science at the University of Montana.
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Severe weather in southern and central Alberta on Aug. 11, 2026 A line of intense storms blew through southern and central Alberta on Aug. 11, 2026, leaving significant damage to homes, vehicles and crops in the town of Clareholm, while hail fell like snow in other areas of the province.
Severe weather in southern and central Alberta on Aug. 11, 2026 A line of intense storms blew through southern and central Alberta on Aug. 11, 2026, leaving significant damage to homes, vehicles and crops in the town of Clareholm, while hail fell like snow in other areas of the province.
Severe weather in southern and central Alberta on Aug. 11, 2026 A line of intense storms blew through southern and central Alberta on Aug. 11, 2026, leaving significant damage to homes, vehicles and crops in the town of Clareholm, while hail fell like snow in other areas of the province.
Severe weather in southern and central Alberta on Aug. 11, 2026 A line of intense storms blew through southern and central Alberta on Aug. 11, 2026, leaving significant damage to homes, vehicles and crops in the town of Clareholm, while hail fell like snow in other areas of the province.
Severe weather in southern and central Alberta on Aug. 11, 2026 A line of intense storms blew through southern and central Alberta on Aug. 11, 2026, leaving significant damage to homes, vehicles and crops in the town of Clareholm, while hail fell like snow in other areas of the province.
Severe weather in southern and central Alberta on Aug. 11, 2026 A line of intense storms blew through southern and central Alberta on Aug. 11, 2026, leaving significant damage to homes, vehicles and crops in the town of Clareholm, while hail fell like snow in other areas of the province.
Severe weather in southern and central Alberta on Aug. 11, 2026 A line of intense storms blew through southern and central Alberta on Aug. 11, 2026, leaving significant damage to homes, vehicles and crops in the town of Clareholm, while hail fell like snow in other areas of the province.
Severe weather in southern and central Alberta on Aug. 11, 2026 A line of intense storms blew through southern and central Alberta on Aug. 11, 2026, leaving significant damage to homes, vehicles and crops in the town of Clareholm, while hail fell like snow in other areas of the province.
Severe weather in southern and central Alberta on Aug. 11, 2026 A line of intense storms blew through southern and central Alberta on Aug. 11, 2026, leaving significant damage to homes, vehicles and crops in the town of Clareholm, while hail fell like snow in other areas of the province.
Severe weather in southern and central Alberta on Aug. 11, 2026 A line of intense storms blew through southern and central Alberta on Aug. 11, 2026, leaving significant damage to homes, vehicles and crops in the town of Clareholm, while hail fell like snow in other areas of the province.
The new system only works for thunderstorms and tornadoes.
Other events, such as heat warnings and thunderstorm watches, will still alert broader areas.
