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Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture boundary, moisture, and (in the event of severe, precipitation-based events) instability in the atmosphere.
Also actiniform. Describing a collection of low-lying, radially structured clouds with distinct shapes (resembling leaves or wheels in satellite imagery), and typically organized in extensive mesoscale fields over marine environments. They are closely related to and sometimes considered a variant of stratocumulus clouds. actinometer A scientific instrument used to measure the heating power of ...
Map of regions covered by the 122 Weather Forecast Offices. The National Weather Service operates 122 weather forecast offices. [1] [2] Each weather forecast office (WFO or NWSFO) has a geographic area of responsibility, also known as a county warning area, for issuing local public, marine, aviation, fire, and hydrology forecasts.
Top weather news for Friday, Feb. 21, 2025: Friday brings the final day of the record-breaking arctic outbreak that has frozen the central U.S., but the danger isn't over. More… AccuWeather 6 ...
2. Severe Storms In The South-The warm side of those winter storms will produce severe weather in a first-round Wednesday and Wednesday night, especially from eastern Louisiana to central and ...
The U.S. Weather Bureau would describe this tornado as "the most officially observed one in history". [52] 1940 Blizzard: 154 $2 million Armistice Day Blizzard: North and Central Midwest Damage total not adjusted for inflation. 1938 Hurricane: 600 Great New England Hurricane: 1938 Flood: 115 Los Angeles Flood of 1938: Los Angeles 1937 Flood ...
Weather Prediction Center forecast map for Thursday, Oct. 31, 2024, shows much of the eastern U.S. experiencing unseasonably warm weather while cool weather envelopes the west. Central US faces ...
2006: A lake-effect snow storm, nicknamed "Aphid" by the local National Weather Service office, dumped as much as 60 inches (150 cm) of heavy, wet snow on Buffalo, New York, damaging 90% of the city's trees and resulting in 13 deaths.