If you’ve ever scrolled through any photos or videos tagged #abstorm on social media, you’ve witnessed the extreme weather that Alberta experiences each year. According to Global News, Alberta gets hit with an average of 40 major storms every summer. Reducing the severity of hailstorms is extremely important in order to minimize the amount of damage and insurance claims that can occur.
Alberta is home to over half of all catastrophic hail events in Canada, including storms in 2012 (Calgary) and 2014 (Airdrie) that each did over $500 million dollars in insured damage. Reducing the impact and severity of these storms would provide a major benefit to Albertans and the insurance industry.
The Alberta Hail Suppression Project (AHSP) is a program funded by the Alberta Severe Weather Management Society (ASWMS) that has been running since 1996 with the goal of mitigating the amount of hail damage affecting urban property such as homes and vehicles. The program uses seeding planes that fly between June to September 15th every year.
The project utilizes cloud seeding, which is a process involving the use of silver iodide in the form of smoke to produce ice crystals that are believed to reduce the size of hail. This process turns hail that could reach the size of a golf ball into smaller hailstones or rain as it warms before reaching the ground. This small hail or rain does not damage property, and significant losses are therefore averted.
Since there are only 5 seeding planes, priority is given to storms based on their severity and the population of the community being threatened. The area seeded runs from just south of High River, all the way up to Rocky Mountain House and Lacombe. This covers the cities of Calgary, Airdrie, Red Deer, Okotoks, Cochrane and others within the protected area.
While concerns may arise over the use of silver iodide in storm clouds, the quantity used is very small relative to the amount of water in the storms. The level of silver iodide found in storm water that has been seeded can be compared to the natural level of silver iodide found in surface or tap water.
Cloud seeding does not make storm clouds disappear and does not “turn off” the hail, but it does reduce the size of hailstones. Cloud seeding is done for various reasons around the world, including rain and snow enhancement, but in Alberta it is only used for hail mitigation.
The team at Fuse Insurance recently went on a tour of the Alberta Hail Suppression Project facility and got a close-up look at the seeding aircrafts and software used to predict severe weather conditions. The radar used by AHSP is available to the public on the WMI Radar website here and an updated loop of the radar can be found here. It serves as a helpful and fascinating tool on stormy days and pinpoints where the seeding planes are located, as well as what storm cells are expected to do.
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