The other day,
A14O0165: Atlantic Southeast Airlines, flight 4538 (EMB-145LR, registration N16954) departed Grand Rapids (KGRR) destined for Newark (KEWR). Due to weather the flight deviated north and was transitioning through Canadian airspace at FL 370. Approximately 53 NM west of London, ON the aircraft encountered severe weather and turbulence. ATC reported the aircraft climbing and then descending to FL 340, with a rapid rate of descent (approximately 8800 fpm). There was no reported damage.