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The Storm Prediction Center, jointly run by the National Oceanic and Atmospheric Administration and NWS, issues tornado watches. Tornado warnings are issued by your local NWS forecast office.
An existing severe thunderstorm watch, or merely a portion of it, can also be upgraded to a tornado watch, if conditions that were originally considered marginally conducive if at all for tornadic development have evolved to permit a greater risk of tornado formation; conversely, a section or the entirety of an existing tornado watch area can ...
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 ...
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]
Isolated tornadoes are possible but not expected to be the dominant severe weather event, hence these watches are very rarely issued. An expected severe wind event is the mostly likely reason for a PDS severe thunderstorm watch to be issued, with widespread winds greater than 90 mph (150 km/h or 80 knots) possible. These watches are usually ...
A tornado warning is more severe than a watch, according to the NWS. When a warning is issued, there is imminent danger and a tornado was spotted, or imminent. A watch indicates that tornadoes are ...
A tornado watch therefore implies that it is also a severe thunderstorm watch. When a tornado watch is issued, people within the region of expected tornado threat are advised to review safety precautions in the event they must seek immediate shelter in a basement, cellar, safe room or a sturdy above-ground room in the center section of a home ...
Dangerous weather is expected across Central Kentucky Tuesday afternoon.