Northern Hail Project recovers record-breaking hailstone

The record-breaking hailstone was recovered northwest of Markerville, Alta. on August 1, 2022. The weight is 292.71 grams and the diameter is 123mm. A Canadian record-breaking hailstone was recovered by Western University's Northern Hail Project (NHP) field team, following a storm earlier this week near Markerville, Alta. The record-breaker weighs 292.71 grams, eclipsing the previous title holder - a hailstone weighing 290 grams, collected nearly 50 years ago in Cedoux, Sask. on July 31, 1973. With a diameter of 123 millimetres, the hailstone has a slightly larger span than a standard DVD (120 mm).