Global InformationHurricane Hilda tornado outbreak information
 Map plotting the track and intensity of the storm, according to the Saffir–Simpson scale | |
| Type | Tornado outbreak Tropical cyclone |
|---|---|
| Duration | October 3–4, 1964 |
| Tornadoes confirmed | 12 |
| Max. rating1 | F4 tornado |
| Duration of tornado outbreak2 | 1 day, 11 hours, 30 minutes |
| Fatalities | 22 fatalities, 175 injuries |
| Damage | ≥ $8.107 million (1964 USD)[1][nb 1] $79.6 million (2024 USD) |
| Areas affected | Southeastern United States |
Part of the tornadoes and tornado outbreaks of 1964 1Most severe tornado damage; see Fujita scale 2Time from first tornado to last tornado | |
On October 3–4, 1964, Hurricane Hilda and its remnants generated a tornado outbreak over portions of the Southeastern United States. The outbreak, which yielded at least 12 confirmed tornadoes, killed 22 people and injured 175 others. Most of the casualties occurred as a result of a violent tornado that devastated the northern outskirts of Larose, Louisiana, becoming the deadliest hurricane-generated tornado on record since 1900 and one of only two violent tornadoes (F4+) recorded in the southern Gulf Coast region of Louisiana. The tornado was also one of only two F4s known to have been produced by a tropical cyclone, the other having occurred during Hurricane Carla on September 12, 1961.[2][3][4][nb 2][nb 3][nb 4]
- ^ Storm Data Publication 1964, Events Reported
- ^ Edwards 2012, p. 2.
- ^ Hagemeyer, Bartlett C.; Spratt, Scott M. (2002). Written at Melbourne, Florida. Thirty Years After Hurricane Agnes: the Forgotten Florida Tornado Disaster (PDF). 25th Conference on Hurricanes and Tropical Meteorology. San Diego, California: American Meteorological Society. Archived from the original (PDF) on October 16, 2008.
- ^ Grazulis, Thomas P.; Grazulis, Doris (April 26, 2000). "The United States' Worst Tornadoes". The Tornado Project. St. Johnsbury, Vermont: Environmental Films. Archived from the original on May 14, 2008. Retrieved August 18, 2021.
- ^ Schneider, Russell S.; Brooks, Harold E.; Schaefer, Joseph T. (2004). Tornado Outbreak Day Sequences: Historic Events and Climatology (1875–2003) (PDF). 22nd Conf. Severe Local Storms. Hyannis, Massachusetts: American Meteorological Society. Retrieved September 17, 2019.
- ^ Grazulis 1993, p. 141.
- ^ Grazulis 2001a, p. 131.
- ^ Edwards, Roger (March 5, 2015). "Enhanced F Scale for Tornado Damage". The Online Tornado FAQ (by Roger Edwards, SPC). Storm Prediction Center. Retrieved February 25, 2016.
- ^ "Enhanced Fujita Scale (EF-Scale)". Environment and Climate Change Canada. June 6, 2013. Archived from the original on March 3, 2016. Retrieved February 25, 2016.
- ^ "The International Tornado Intensity Scale". Tornado and Storm Research Organisation. 2016. Archived from the original on March 5, 2016. Retrieved February 25, 2016.
- ^ Grazulis 2001a, pp. 251–4.
- ^ Edwards, Roger (March 5, 2015). "The Online Tornado FAQ (by Roger Edwards, SPC)". Storm Prediction Center: Frequently Asked Questions about Tornadoes. Storm Prediction Center. Retrieved February 25, 2016.
- ^ Cook & Schaefer 2008, p. 3135
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