Weather summary for Alberta updated by Environment Canada at 11:44 a.m. MDT Monday 24 July 2017. Discussion. An area of severe thunderstorms tracked across central and southern Alberta on Sunday July 23, 2017. The following is a summary of weather event information received by Environment Canada. 1. Summary of hail size in millimetres: Bashaw (Tennis Ball): 64 Wetaskiwin (Hen Egg): 50 Bowden (Golf Ball): 45 Camrose (Golf Ball): 45 Red Deer (Golf Ball): 45 Rimbey (Golf Ball): 45 North of Ponoka (Golf Ball): 45 Innisfail (Walnut): 35 2. Summary of maximum wind gusts in kilometres per hour: Patricia: 115 Two Hills: 109 Sunnynook: 104 Bassano: 102 Cereal: 98 Alliance: 96 Crestomere: 96 Hand Hills: 96 Pollockville: 96 Acadia Valley: 94 Sheerness: 94 Cadogan: 93 Champion: 93 Finnegan: 93 Oyen: 93 Rainier: 93 Seven Persons: 93 Atlee: 91 Stettler: 91 Calgary Airport: 82 Edmonton Airport: 76 There were many reports of wind and hail damage associated with these storms, such as: power outages, broken power poles and damaged trees. Please note that this summary may contain preliminary or unofficial information and does not constitute a complete or final report. End/PASPC