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An example of a tornado warning polygon issued by the National Weather Service. A tornado warning (SAME code: TOR) is a public warning that is issued by weather forecasting agencies to an area in the direct path of a tornado, or a severe thunderstorm capable of producing one, and advises individuals in that area to take cover.
Tornado watches are usually issued at least an hour in advance of anticipated risky weather and up to eight hours before so people can make a plan to act in case a tornado is spotted and a warning ...
When the rain starts to fall, people immediately look to the weather radar to see how long it will last. But when severe weather strikes, meteorologists can use this technology to pinpoint the ...
A tornado warning is more severe than a tornado watch, indicating that people take action and seek shelter. A watch signals that a tornado could occur, while a warning signals once a tornado has ...
Tornado emergency TOR-E (SVS) – Sent as a "severe weather statement" or a complete re-issuance of the tornado warning, this is an unofficial, high-end tornado warning issued when a violent tornado is expected to impact a heavily populated 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]
The tornado emergency designation first came about when a large and destructive tornado hit Oklahoma City, Oklahoma, on May 3, 1999, per the weather service. It was called because the storm was expected to be too severe for the tornado warning, already in effect, to be considered sufficient language to alert people.
Hurricane Ian threatens to bring tornadoes across much of Florida. Here's what to do if your area is under a tornado watch or warning.