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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]
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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.
Severe Thunderstorm Warning continues for Scotts Valley CA, ... Scotts Valley is a small town about six miles north of Santa Cruz in Santa Cruz County and a short distance off of State Highway 17.
Downtown Los Angeles received 4.1 inches (100 mm) of rain on February 4, 2024, marking it the wettest day since March 15, 2003. Several Malibu, California schools were closed due to inaccessibility because of severe weather causing road closures. [14] Power outages caused by the storms left approximately 850,000 people without power.
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 ...
In the United States, severe thunderstorm watches are issued by the Storm Prediction Center (SPC), a national guidance center of the National Weather Service (NWS) branch of the National Oceanic and Atmospheric Administration (NOAA), [4] [5] for areas of the lower 48 states where atmospheric conditions favor the development of convective thunderstorm activity reaching severe criteria.
The thunderstorm did bring a gust of 83 mph to San Francisco International Airport – believed to be the fourth-highest gust ever recorded at the airport. Gusts reached 78 mph in Monterey and 59 ...