| has gloss | eng: A severe thunderstorm warning (SAME code: SVR) is issued when trained storm spotters or a Doppler weather radar indicate a strong thunderstorm is producing dangerously large hail or high winds, capable of causing significant damage. Prior to January 2010, the size in which hail in a severe thunderstorm would be considered severe was 3/4s of an inch; public complacency due to overly frequent issuances of severe thunderstorm warnings and recent studies stating that hail does not produce damage until it reaches one inch in diameter caused the upgrade. In Canada, a severe thunderstorm has wind gusts of >90 km/h (56 mph), hail with a diameter of >20 mm (0.8 inch), rainfall of >50 mm (2 inches) in an hour or >75 mm (3 inches) in three hours, or tornadoes. |
