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The word tornado comes from the Spanish tronada (meaning 'thunderstorm', past participle of tronar 'to thunder', itself in turn from the Latin tonāre 'to thunder'). [16] [17] The metathesis of the r and o in the English spelling was influenced by the Spanish tornado (past participle of tornar 'to twist, turn,', from Latin tornō 'to turn'). [16]
Mini-tornado – A fallacious term often used in European news media to refer to tornadoes occurring there; even large, strong, and/or long track tornadoes produced by supercells. This is apparently due to the erroneous perception that "real" tornadoes do not occur in Europe (or elsewhere where the term is applied).
The highest rated damage following the 2024 Greenfield tornado; an engineered or well-constructed home with its slab swept clean of debris. Since the late 18th century, meteorologists and engineers have worked to assess the intensity of tornadoes, typically through the work of a tornado damage survey or a scientific case study.
Tornado emergency TOR-E (SVS) – Sent as a "severe weather statement" or a complete re-issuance of the tornado warning, this is an unofficial, high-end tornado warning issued when a violent tornado is expected to impact a heavily populated area.
Tornadoes of 1913. 1913 Easter tornado outbreak; Tornadoes of 1916. Tornado outbreak of June 5–6, 1916; Tornadoes of 1917. March 1917 tornado outbreak; Tornado outbreak sequence of May 25 – June 1, 1917; Tornadoes of 1918. 1918 Tyler tornado; Tornadoes of 1919. Tornado outbreak of April 9, 1919; 1919 Fergus Falls tornado; Tornadoes of 1920
While most tornadoes attain winds of less than 110 miles per hour (180 km/h), are about 250 feet (80 m) across, and travel a few miles (several kilometers), the wind speeds in the most intense tornadoes can reach 300 miles per hour (480 km/h), are more than two miles (3 km) in diameter, and stay on the ground for dozens of miles (more than 100 km).
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]
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 ...