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Severe thunderstorm warnings and tornado warnings, by their nature, will typically be issued with very little lead time. Weather warnings are usually issued for regular forecast regions affected. Severe thunderstorm and tornado warnings, however, might be issued specifically for smaller warning or "sub-regions" within the regular forecast area ...
In Canada, a severe thunderstorm is defined as having wind gusts of greater than 90 km/h (56 mph), hail with a diameter of greater than two centimetres (0.79 in), rainfall rates of greater than 50 millimetres (2.0 in) in one hour or greater than 75 millimetres (3.0 in) in three hours, or tornadoes. [14]
In Canada, governmental weather warnings and watches are issued by the Environment Canada.Environment Canada defines an advisory as "an alert to cover a wide array of deteriorating weather conditions," a watch as "when conditions favour that severe weather forming" and a warning as "severe weather is actually occurring or is imminent."
When severe weather looms, storm alerts are important tools for keeping people informed. The National Weather Service shares alerts as it warns of potential risks from thunderstorms, flooding ...
Effective June 2021, broadcast intrusive alerts are now issued for severe thunderstorm warnings if winds exceed 130 km/h (81 miles per hour), or hail exceeds 7 centimetres (2.8 in). On 21 May 2022, a broadcast intrusive alert was issued for a derecho in Ontario and Quebec (identified as a severe thunderstorm warning) under these criteria for ...
Environment Canada issued weather statements for Sarnia and Windsor at 9:43 am, [40] which was upgraded for Sarnia to a severe thunderstorm warning at 10:25 am. [41] Severe thunderstorm watches for the London area followed at 10:41 am, [42] upgraded to a severe thunderstorm warning at 11:08. [43] The alert mentioned possible strong wind gusts ...
The Meteorological Service of Canada (MSC; French: Service météorologique du Canada – SMC) is a branch of Environment and Climate Change Canada, which primarily provides public meteorological information and weather forecasts and warnings of severe weather and other environmental hazards.
See Severe weather terminology (United States) and/or Severe weather terminology (Canada) for comprehensive articles concerning specific nations' warnings, watches, advisories and related terms. Pages in category "Weather warnings and advisories"