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On Tuesday, April 10, 1979, a widespread and destructive outbreak of severe weather impacted areas near the Red River between Oklahoma and Texas. Thunderstorms developed over West and North Central Texas during the day within highly unstable atmospheric conditions following the northward surge of warm and moist air into the region, producing large hail, strong winds, and multiple tornadoes.
In late 2023, American meteorologist and tornado expert Thomas P. Grazulis created the Outbreak Intensity Score (OIS) as a way to rank tornado outbreaks. [1] [2] For the score, only significant tornadoes are counted: F2/EF2 tornadoes receive 2 points each, F3/EF3 tornadoes receive 5 points each, F4/EF4 tornadoes receive 10 points each, and F5/EF5 tornadoes receive 15 points each. [1]
Damage inflicted by the 2011 Joplin tornado, the deadliest tornado thus far in the 21st century in the US.. The following is a list of the deadliest tornadoes in the Americas including Canada, Mexico, and the United States as well as the countries and islands of the Caribbean and the countries included in both Central America and South America.
Severe tornado damage occurs with an EF3 tornado, which has wind speeds of 136 to 165 mph. Some walls of well-constructed houses can be torn off. Most trees in the path of the twister will be ...
A small, but deadly tornado outbreak occurred over the Upper Midwest of the United States. An F0 tornado near Littlefork, Minnesota lifted and moved a mobile home, killing its two occupants. It is Minnesota's most recent single tornado to cause multiple deaths. Other minor tornadoes occurred in Minnesota, Iowa and Wisconsin, causing limited damage.
The Wichita Falls, Texas, tornado of April 3 was rated F5. First tornado ever captured on live television. First of two violent tornadoes to hit Wichita Falls, the other—an F4 tornado that killed 42—occurring on April 10, 1979. (13 significant, 1 violent killer) [68] Tornado outbreak sequence April 12–14, 1964: April 12–14, 1964 ...
The 1972 Portland–Vancouver tornadoes were caused by an unusually intense squall line with embedded strong tornadoes that struck Oregon and Washington on Wednesday, April 5, 1972. Of the four tornadoes, the most catastrophic event was a deadly F3 tornado that struck Portland, Oregon , and Vancouver, Washington , the first F3 tornado to strike ...
Since its initial usage in May 1999, the National Weather Service (NWS) in the United States has used the tornado emergency bulletin — a high-end classification of tornado warning — sent through either the issuance of a warning or via a "severe weather statement" that provides updated information on an ongoing warning—that is issued when a violent tornado (confirmed by radar or ground ...