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EF4. 97 mph (156 km/h) 6. Tornado outbreak of April 13–16, 2012 – This was day 2 of aforementioned outbreak; it was only the second high risk to be issued on Day 2 (the day before the event; first Day 2 high risk was for April 7, 2006) and the first/only to date ever issued on the initial (0600Z) Day 2 outlook. [277]
Progression of a well-anticipated extremely critical event across the Central Plains on March 6, 2017. This event produced wildfires that burned 1,200,000 acres of land, and killed seven people. An extremely critical fire weather event is the greatest threat level issued by the NWS Storm Prediction Center (SPC) for wildfire events in the United ...
A widespread and deadly tornado outbreak affected the Southeastern United States on Easter Sunday and Monday, April 12–13, 2020. Several tornadoes were responsible for prompting tornado emergencies, including the first one to be issued by the National Weather Service in Charleston, South Carolina. [7] A large squall line formed and tracked ...
The Storm Prediction Center issues convective outlooks (AC), consisting of categorical and probabilistic forecasts describing the general threat of severe convective storms over the contiguous United States for the next six to 192 hours (Day 1 through Day 8). These outlooks are labeled and issued by day, and are issued up to five times per day.
From April 25 to 28, 2024, a very large, deadly and destructive tornado outbreak occurred across the Midwestern, Southern, and High Plains regions of the United States, primarily on April 26 and 27. [3] On April 26, the Storm Prediction Center (SPC) first issued an enhanced risk for the Plains, as a broad upper-trough moved eastwards, with ...
This is a list of meso-gamma mesoscale discussions, which are issued by the National Oceanic and Atmospheric Administration ’s Storm Prediction Center for small-scale analysis of mesoscale features, typically during high-confidence and high-impact severe weather events. [1][2][3][4][5] These can be for tornadoes believed to be at least EF2 on ...
On April 19, the Storm Prediction Center outlined portions of the U.S. Southern Plains with a 15% area of severe weather within 25 miles of any point. [4] A Slight risk was maintained across much of the same areas in the subsequent day 3 outlook, [5] but parts of southeastern Oklahoma, much of northeastern Texas, southwestern Arkansas, and northwestern Louisiana were upgraded to an Enhanced ...
April 9, 1991. Southern Great Lakes Derecho of 1991. July 7–8, 1991. Pakwash Forest Blowdown. July 18, 1991. near Ear Falls, Ontario – 191,400 hectares of forest blown down, in a line some 40 km (25 mi) long. Post-damage survey estimated peak wind speeds of over 100 mph (160 km/h) [8] 1993 Storm of the Century.