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Meteorological synopsis

An extratropical cyclone developed over Nebraska on the morning of March 31. As a result, meteorologists expected a storm mode of discrete supercells to develop. This, along with the presence of even stronger CAPE values and a more unstable environment across Illinois and eastern Missouri, led to the SPC "bridging" the two main moderate risk areas and giving a 15% hatched risk for significant tornadoes at their 1300 UTC outlook. The surrounding area, which extended into central portions of Kentucky and Tennessee, extreme southwestern Indiana, and northwestern Alabama, was given a 10% hatched risk for tornadoes. Additionally, a large 30% partially hatched contour for damaging wind gusts (with a smaller 45% risk in the northern part of the risk), and large hail were also added in this new outlook.

With increased confidence of favorable parameters for severe weather, the SPC upped the threat for strong tornadoes even further, introducing two tornado-driven high risk areas in their 16:30 UTC outlook; it was the first high risk issuance since March 25, 2021. In 2024, SPC forecaster and meteorologist Andrew Lyons stated, "we've been building up to this crescendo all week, knowing that pretty much all the parameters are there for something big and then one by one, each piece kind of fell in that morning." The first high risk area covered southeastern Iowa, northwestern Illinois, and far northeastern Missouri, while the second included eastern Arkansas, southwestern Tennessee, and northern Mississippi. These two distinct areas were given a 30% hatched risk for tornadoes, given the extremely favorable environment for the development and sustainment of discrete supercells with strong to violent tornado potential. The northern high-risk area was expected to see an arcing band of quasi-discrete supercells that would initially produce large hail before becoming tornadic with the possibility of producing several long-track strong to potentially violent tornadoes. Supercells would be more scattered, but longer tracked within the southern high-risk area with multiple rounds of tornadic storms capable of producing long-lived strong to violent tornadoes expected. The large area surrounding and connecting the two high risk areas maintained a moderate risk, with an accompanying 15% hatched risk for tornadoes, as supercells that could develop in this environment could similarly sustain and rotate, although storm coverage was expected to be somewhat lower, and the environment would not be as favorable.

After dark, despite the absence of daylight heating, strong wind shear continued to support the squall line over northern Illinois and southern Wisconsin. This led to widespread wind damage and several weak tornado touchdowns in the Chicago metropolitan area. Additionally, an organizing cluster of severe storms with embedded supercells orientated from southwest to northeast continued to produce tornadoes, some of which were strong, as they moved northeastward through eastern Illinois into western Indiana. Another deadly high-end EF3 tornado spawned from a rogue supercell ahead of an advancing squall line in eastern Illinois and prompted yet another tornado emergency as it passed near Robinson, Illinois, before crossing into Indiana and striking the southern part of Sullivan, Indiana.

Tornado summary

The tornado first touched down along County Highway 16 southwest of Ste. Marie in Jasper County, Illinois, and moved east-northeastward, causing sporadic EF0 tree damage. The tornado began to strengthen after it crossed into Crawford County, inflicting EF1 to EF2 damage. As it passed near Pierceburg, the tornado collapsed the roof structure of a machine shed, snapped wooden power poles, and sheared off the tops of trees. Northeast of there along County Highway 15, EF1 to EF2 damage continued to occur as two homes suffered major roof damage, with one of them having a portion of its roof uplifted. A nearby mobile home was torn in half with its debris strewn about 20 yards (18 m) in opposite directions, and additional trees had their tops sheared off. Past this area, the tornado threw a semi-trailer into a large machine shed, destroying it. Debris from the machine shed impacted an old, poorly anchored home, which had its exterior walls removed. The tornado strengthened further as it moved south of Stoy and Oil Center and through rural areas to the northeast, causing major EF2 to EF3 damage. Damage survey teams had difficulty accessing this area due to flooding and utility roadblocks, but the area was eventually surveyed via the use of drone video and satellite imagery. Aerial video of this area showed that multiple homes and farmsteads were completely destroyed with outbuildings swept from their foundations and debris scattered long distances across fields. Several people were left trapped under debris in basements and had to be rescued, and a large 1,000 gallon propane tank was thrown out into a farm field. As the tornado continued to the northeast, the presence of a large debris ball on radar prompted the issuance of a tornado emergency for Robinson as the tornado approached the south side of town.

Moving through the southern edge of Robinson, the tornado maintained EF2 to EF3 strength as it continued northeastward completely destroying two mobile homes along County Highway 9, killing one person in each structure. Several other homes sustained significant damage, including one unanchored home that collapsed at high-end EF3 intensity, leaving only one wall and the attic structure left standing, and numerous trees and power poles were snapped. Maintaining EF2 the EF3 intensity, the tornado then narrowly missed the Marathon Petroleum Oil Refinery southeast of Robinson, obliterating several manufactured homes, inflicting roof damage to other homes, snapping large trees, and scouring the ground. It then impacted the eastern outskirts of Robinson near Gordon at high-end EF3 intensity, causing a fatality when it destroyed the H. L. Crisp Educational Center along IL 1. The two-story masonry building had most of its upper floor destroyed, while multiple walls collapsed on the first floor. Additional EF2 to EF3 damage occurred nearby as a couple of homes and vehicles were destroyed, and major damage to trees and power poles was observed. After causing EF2 damage to homes and trees as it crossed over IL 33, the tornado struck the Robinson Municipal Airport at high-end EF3 intensity. Multiple metal airplane hangars, which had rigid steel beam frames measuring greater than 18 inches (46 cm) in diameter, were completely destroyed, including some that were swept away. Multiple airplanes and several vehicles were thrown and destroyed, an outbuilding structure was also destroyed, and extensive damage to utility poles and a few homes occurred in this area. Several tractor-trailers and pieces of farm machinery were thrown and piled on top of one another as well. The tornado then weakened, but remained strong, causing a continuous path of EF1 to EF2 damage as it crossed County Highway 5 north of Palestine. Multiple homes had large sections of their roof structures removed, and large machine sheds suffered wall damage along this segment of the damage path. Heavy tree damage and ground scouring was also observed as the tornado approached the Wabash River.

The tornado then crossed the Wabash River into Sullivan County, Indiana, just north of Riverton, maintaining high-end EF1 to EF2 strength as it passed to the south of Merom. Multiple barns and outbuildings were completely demolished, farming equipment was tossed around, a residence sustained roof damage, and numerous large trees and power poles were snapped. The tornado continued to intensify as it passed through rural areas to the northwest of New Lebanon, where four metal truss electrical transmission towers were collapsed at EF3 intensity. EF2 to EF3 damage continued as the tornado moved to the northeast and approached the town of Sullivan. Just southwest of the town, three poorly anchored homes were severely damaged or destroyed, and a modular home was thrown at least 200 yards (180 m) and destroyed, killing the two occupants. A large trailer and several cars in this area were also thrown, outbuildings were obliterated, and hundreds of trees were snapped. Crossing US 150/US 41 into the southern part of Sullivan, the tornado inflicted widespread EF2 to EF3 damage, with many homes and other structures being severely damaged or destroyed. Numerous homes in town sustained total loss of their roofs and exterior walls, and several poorly anchored homes were swept from their foundations and completely destroyed, with debris strewn throughout residential areas. A few businesses, a VFW hall, a metal shop building, and several outbuilding structures were also destroyed. A food pantry was damaged as well, and major tree damage occurred throughout the south side of town. Intensifying further to high-end EF3 strength, the tornado crossed East Center Road at the southeast edge of town, where several poorly anchored homes were swept away and destroyed, including one modular home that was thrown at least 150 yards (140 m), killing one of the occupants while injuring the other. A few other homes sustained roof and exterior wall loss and multiple vehicles were tossed, one of which was thrown 300 feet (91 m). The tornado then quickly weakened as it exited Sullivan and continued to the east-northeast, overturning a dump truck and damaging trees in wooded areas before dissipating to the east of the town. Damage along this final portion of the path was rated EF0 to EF1.

The tornado had a total path length of 40.86 miles (65.76 km) and reached a peak width of 660 yards (600 m). It caused six fatalities, and injured 16 other people.

Aftermath

Damage

Fatalities

Three people were killed by the tornado, all three of whom resided in Sullivan at the time tornado. Two people were killed in the same home and were related, while the third fatality occurred in a mobile home that was destroyed.

See also

Notes and footnotes

Notes

Footnotes

1. ^ National Centers for Environmental Information (June 2023). "Indiana Event Report: EF3 Tornado". Storm Event Database. National Oceanic and Atmospheric Administration. Archived from the original on 27 June 2023. Retrieved 27 June 2023. Cite error: The named reference "NCEI Sullivan Indiana" was defined multiple times with different content (see the help page).
2. ^ "Mar 31, 2023 1300 UTC Day 1 Convective Outlook". March 31, 2023. Archived from the original on April 1, 2023. Retrieved March 31, 2023.
3. Olsen, Max; Lyons, Andrew; Greenwood, Trey; Hernandez, Jacob; Charles, Tanner; Wright, Taylor; Pitts, Devin; Hall, Zachary (30 March 2024). "3/31/2023 - The Tornado Outbreak of the Decade" (Video & Interviews). YouTube. @MaxOlsonChasing. Archived from the original on 31 March 2024. Retrieved 31 March 2024.
4. ^ "NWS Damage Survey for 03/31/2023 Crawford County Tornado". National Weather Service Forecast Office in Lincoln, Illinois. April 2, 2023. Archived from the original on April 2, 2023. Retrieved April 2, 2023 – via Iowa Environmental Mesonet.
5. ^ Cite error: The named reference DAT was invoked but never defined (see the help page).
6. ^ "March 31, 2023 Tornado Event". www.weather.gov. National Weather Service Lincoln IL. Archived from the original on April 4, 2023. Retrieved 11 April 2023.
7. Barber, Rex (April 3, 2023). "Aerial video shows tornado's path of destruction in Illinois, Indiana". thehill.com. The Hill. Archived from the original on November 8, 2023. Retrieved April 17, 2023.
8. ^ Benter, Brandyn (April 1, 2023). "Three dead, three flown to hospitals after storm in Crawford Co". wgntv.com. WGN. Archived from the original on April 17, 2023. Retrieved April 17, 2023.
9. "ILX Tornado Warning #29". mesonet.agron.iastate.edu. National Weather Service Lincoln IL. Archived from the original on September 1, 2020. Retrieved 10 April 2023.
10. Rigsby, Aaron (April 1, 2023). "N/A". twitter.com. Ohio Storm Chasers. Archived from the original on November 8, 2023. Retrieved April 17, 2023.
11. Winklepeck, Dana (April 21, 2023). "Sullivan VFW begins efforts to rebuild following tornado devastation". mywabashvalley.com. Nextar Media Inc. Archived from the original on April 21, 2023. Retrieved April 21, 2023.
12. "Our Father's Arms". sullivan-times.com. Sullivan Times. April 12, 2023. Archived from the original on April 21, 2023. Retrieved April 21, 2023.
13. ^ "...NWS Damage Survey for 03/31/23 Sullivan County Tornado Event - Update #2..." Iowa Environment Mesonet. National Weather Service Indianapolis IN. Archived from the original on April 3, 2023. Retrieved 3 April 2023.
14. "3 dead, at least 8 injured in Sullivan after tornado; search and rescue continues". WTHR. April 1, 2023. Archived from the original on April 2, 2023. Retrieved April 1, 2023.
15. ^ "3 deaths reported in Sullivan County after tornado strikes". WRTV Indianapolis. 2023-04-01. Retrieved 2024-12-07.
16. Moritz, Gwen; Oxenden, McKenna; Albeck-Ripka, Livia; Ives, Mike (April 2, 2023). "At Least 32 Killed as Tornadoes Tear Through the Midwest and South". The New York Times. Retrieved December 7, 2024.
17. National Weather Service 2023. sfn error: no target: CITEREFNational_Weather_Service2023 (help)

Sources

• National Weather Service. "Storm Events Database: Sullivan EF3 tornado". National Weather Service. Retrieved December 7, 2024.