How can outflow boundaries influence tornado development?

The most obvious difference between a tornado and hurricane is that a hurricane's horizontal scale is about a thousand times larger than a tornado. In addition, ... using a deterministic analysis of NOAA tornado data to correlate the mapped frequency of strong tornadoes with four tornado wind speed zones: 250 mph, 200 ... All sirens are tested at noon on the first Saturday of each month and silently tested daily internally by the system itself. Other than tests, the sirens are ... Quick Tornado Facts · Tornadoes cause an average of 70 fatalities and 1,500 injuries in the U.S. each year. · The strongest tornadoes have rotating winds of ... Take shelter immediately if there is a tornado warning or if you see signs of a tornado. Take shelter if you see signs of a tornado. A series of tornadoes produced by a single supercell, resulting in damage path segments along the same general line. Tornado Vortex Signature: An image of a ... Mar 30, 2025 ... A tornado watch means "be prepared." Tornadoes are possible in and near the watch area. Review and discuss your emergency plans and check ... Tornadoes develop from severe thunderstorms in warm, moist, unstable air along and ahead of cold fronts. Such thunderstorms also may generate large hail and ... Mar 31, 2023 ... 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 ... Jun 10, 2024 ... Tornadoes are a swirling tube of high-speed wind, called a vortex. They form on the bottom of a thunderstorm cloud and stretch from the cloud to the ground.