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Completed Tornado Diagram. Tornado diagrams, also called tornado plots, tornado charts or butterfly charts, are a special type of Bar chart, where the data categories are listed vertically instead of the standard horizontal presentation, and the categories are ordered so that the largest bar appears at the top of the chart, the second largest appears second from the top, and so on.
Lake Texoma is one of the largest reservoirs in the United States, the 12th-largest US Army Corps of Engineers' (USACE) lake, and the largest in USACE Tulsa District. [1] Lake Texoma is formed by Denison Dam on the Red River in Bryan County, Oklahoma , and Grayson County, Texas , about 726 miles (1,168 km) upstream from the mouth of the river.
A large tornado outbreak struck the Southern region of the United States on March 21–22, 2022, before transitioning to the Eastern United States on March 23. The outbreak started with numerous supercell thunderstorms and severe squall lines developing in central Texas and southern Oklahoma, prompting the issuance of numerous tornado warnings, including multiple PDS tornado warnings. [4]
In the U.S., F0 and F1 (T0 through T3) tornadoes account for 80% of all tornadoes. The rate of occurrence drops off quickly with increasing strength—violent tornadoes (F4/T8 or stronger), account for less than one percent of all tornado reports. [6] Worldwide, strong tornadoes account for an even smaller percentage of total tornadoes.
The 1977 Birmingham–Smithfield F5 tornado's damage was surveyed by Ted Fujita and he "toyed with the idea of rating the Smithfield tornado an F6". [13] In 2001, tornado expert Thomas P. Grazulis stated in his book F5–F6 Tornadoes ; "In my opinion, if there ever was an F6 tornado caught on video, it was the Pampa, Texas tornado of 1995 ". [ 14 ]
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The old scale lists an F5 tornado as wind speeds of 261–318 mph (420–512 km/h), while the new scale lists an EF5 as a tornado with winds above 200 mph (322 km/h), found to be sufficient to cause the damage previously ascribed to the F5 range of wind speeds.
editor’s note: this story was updated after the national weather service on sunday, april 24, 2023, confirmed that an ef-0 tornado formed on lake norman in southern iredell county on saturday ...