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NOAA’s Storm Prediction Center had placed the Bay Area in a Level 1 out of 5 severe weather threat through Saturday morning for potentially severe thunderstorms that could bring large hail ...
California’s first blizzard warning since 1989. For premium support please call: 800-290-4726 more ways to reach us
A tornado touched down in the Northern California town of Scotts Valley near Santa Cruz Saturday afternoon, flipping cars and knocking down power lines, according to authorities.
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.
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]
PDS severe thunderstorm watches are issued when there is a higher than normal risk of severe thunderstorm winds capable of major structural damage (in addition to large hail and perhaps a few isolated tornadoes), usually due to a strong and persistent derecho. These watches are very rare (accounting an average of only two each year), as the ...
Early Saturday morning, a rare tornado warning was issued for San Francisco County and northwestern San Mateo County, noting that a severe thunderstorm capable of producing a tornado was located ...
Severe thunderstorm emergency SVR (SVS) – Sent as a "severe weather statement" or a complete re-issuance of the severe thunderstorm warning, this is an unofficial, high-end severe thunderstorm warning that is occasionally issued when a significant severe thunderstorm is imminent or impacting a highly populated area.