torre126/tornado-structure-data huggingface dataset:
Episode narrative: Surface low pressure system tracked across the North Dakota/South Dakota border creating an environment supporting the threat for low top supercells in Southeastern North Dakota into adjacent West Central Minnesota. Several low-top supercells developed and tracked along portions of the Minnesota Red River Valley. Portions of Norman, Polk, Becker, and Mahnomen counties saw multiple tornadoes. Large hail and damaging winds accompanied some of these storms, and flash flooding in some locations as well.

Tornado event in BECKER County, MINNESOTA
Start: 24-JUN-23 15:34:00
End: 24-JUN-23 15:36:00
Direct deaths: 0
Event narrative: A spotter reported brief touchdown near Flom. It occurred in open fields, which mitigated any damage. Therefore, the rating of EF-U has been assigned with an estimated path width and length.

Tornado event in MAHNOMEN County, MINNESOTA
Start: 24-JUN-23 14:52:00
End: 24-JUN-23 14:54:00
Direct deaths: 0
Event narrative: Spotter called with reports of a tornado with intermittent touchdown near Waubun, MN. It occurred in open fields, which mitigated any damage. Therefore, the rating of EF-U has been assigned with an estimated path width and length.
Episode narrative: A narrow waterspout developed off the south shore of Key West, and moved north, making landfall as a tornado at Higgs Beach of Key West.

Tornado event in MONROE County, FLORIDA
Start: 16-AUG-23 08:55:00
End: 16-AUG-23 08:55:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A narrow waterspout with a spray ring extending one-quarter the way up from the water surface to cloud base moved north onshore Higgs Beach as a tornado.  The tornado dissipated on the beach without any discernable damage noted.  Maximum wind speeds of 50 to 60 mph were estimated at the landfall location.
Episode narrative: The first significant event to produce widespread severe weather across the Mid-South for 2023 occurred on March 24, during the afternoon and evening hours.  This severe weather episode occurred mainly over portions of the Lower Mississippi and Tennessee Valleys. Surface analysis for this day depicted a quasi-stationary boundary from the Mid-Atlantic States and Ohio Valley through northern portions of West Tennessee and Arkansas and stretching back through Central Texas. Low pressure tracked along the stalled front into southeast Missouri during the evening. Meanwhile, a potent mid-level trough ejected out of the southwest U.S. Upper air analysis indicated the Lower Mississippi Valley was in the right entrance region of a strong 300 mb upper-level jet streak. This produced sufficient upper-level divergence and lift needed for severe thunderstorm development. 

Moderate instability combined with strong wind shear resulted in a QLCS (Quasi-Linear Convective System) convective mode. This northern part of the QLCS initially started over Western Arkansas Friday afternoon and moved east into Eastern Arkansas by early evening and then across West Tennessee. The northern part of QLCS produced scattered wind damage, flash flooding, and a weak tornado.  The southern end of this QLCS scraped across north Mississippi with numerous reports of flash flooding, damaging winds, and several weak tornadoes. 

The most significant storm of the night occurred during the late evening hours of March 24, as thunderstorms developing in advance of the QLCS streamed northeast Calhoun and Chickasaw Counties. A tight and small circulation developed in Chickasaw County (MS) about 5 miles east-northeast of Trebloc and quickly grew in strength as it moved into Monroe County (MS), producing significant damage from New Wren to Amory and Smithville, with the most significant damage occurring in Amory.

Tornado event in LAFAYETTE County, MISSISSIPPI
Start: 24-MAR-23 19:48:00
End: 24-MAR-23 19:51:00
Direct deaths: 0
Property damage: 70.00K
Event narrative: This tornado moved from Panola County into LaFayette County. The tornado generally followed County Road 317 and caused sporadic, but significant, tree damage from Murphy Ridge Road to County Road 362. Minor structural damage was noted along the path, mainly to barns and outbuildings. Peak winds in LaFayette County were estimated at 100 mph.
Episode narrative: An afternoon severe weather outbreak was organized by an approaching cold front and fueled by 2000-3000 J/kg of CAPE courtesy of high lapse rates aloft, surface dewpoints in the low to mid-70s, and cooresponding temperatures as high as the mid to upper 90s over western central Indiana.  Numerous rotating supercell thunderstorms developed over western central Indiana in the early to mid-afternoon and proceeded to the east-southeast through central and southern Indiana.  These cells produced penny or larger hail over 16 of the region's 39 counties, more isolated straight line wind damage to trees, barns and roofs, and four EF1/EF2 tornadoes within a 33-minute period along the I-69 corridor south of Indianapolis.  Each tornado was spawned from a separate supercell:  an EF2 that impacted residential communities in northwestern Johnson County, a pair of EF1s that tracked across rather rural portions of northern Daviess/Martin Counties and southwestern Monroe County, and finally a longer-track EF2 that crossed far southern Martin County, killing 1 person and injuring another when destroying a rural residence, before ending its track in extreme northeastern Dubois County.  The end of the event saw, amid the weakening cluster of supercells, three cells produce isolated large hail over eastern central Indiana, with also wind damage to two barns in the Seymour area.

Tornado event in DAVIESS County, INDIANA
Start: 25-JUN-23 15:21:00
End: 25-JUN-23 15:27:00
Direct deaths: 0
Property damage: 300.00K
Event narrative: A supercell thunderstorm spawned this second tornado of the day just northeast of the intersection of County Roads 1100 East and 1575 North.  The weak tornado then tracked in an east to east-southeasterly direction occasionally downing trees.  Scores of hardwood trees were snapped, many at mid trunk, on a hilltop just west of US Highway 231.  The tornado continued across the highway and soon after into northwestern Martin County, before ending within the grounds of Crane Naval Support Activity about one mile west-southwest of the southwest corner of Lake Greenwood.
Episode narrative: Several rounds of rain and thunderstorms affected much of Montana during the first half of June. Flash flooding occurred across portions of the region, especially across Fergus County as well as the Rocky Mountains. Fergus County was hit exceptionally hard as several days of occasional heavy rain exasperated area creeks and streams. Casino Creek, located south of Lewistown, was washed out in at least two locations with significant road repairs required. Cottonwood Creek to the west of Casino Creek completely washed out Cotton Creek Road in several areas. Across the Rocky Mountains, easterly flow compressed moisture along the Rocky Mountain Front Range resulting in heavy rainfall and thunderstorms. Several debris flows were reported. Portions of Glacier National Park were temporarily closed due to rock slides and debris flows. The Helena-Lewis and Clark National Forest also reported several flooding impacts. Across Meagher and Broadwater Counties, heavy rain affected the Woods Creek and Deep Creek burn scar areas, resulting in flash flooding along Highway 12. Flash flooding also occurred just south of Great Falls along Wilson Butte Road from a rapidly developing thunderstorm that produced 1.37 inches of rain in less than an hour at a NWS employee's home along Wilson Butte Road. A brief tornado also occurred across rural Hill County and was greatly photographed, but no damage was reported.

Tornado event in HILL County, MONTANA
Start: 10-JUN-23 13:09:00
End: 10-JUN-23 13:15:00
Direct deaths: 0
Event narrative: Broadcast media submitted photos of tornado across rural Hill County. Two additional funnel clouds were filmed near the ongoing tornado. Due to limited access to the touchdown area, no storm survey was able to be conducted. Movement was to the west/northwest and was associated with a strengthening thunderstorm.
Episode narrative: Long duration severe weather event across the northeast plains, and most of the Denver metropolitan area beginning during the early afternoon hours.   Scores of  tornadoes occurred across Washington and Logan counties.  Several rounds of hail across the Denver metro, with ping pong ball sized hail in downtown, larger hail up to 2 inches in diameter at concert in Red Rocks Amphitheatre.  In all, seven patrons were hospitalized,  with 83 treated on scene.   A substantial number of attendees suffered welts, bruises and broken fingers trying to protect themselves.  Several suffered concussions as well.  A total of 33 tornadoes touched down in Washington County, with 3 reported in Logan County.  There were reports of at least one home damaged west of Sterling and one commercial building collapse in Sterling. The home was damaged by one of the tornadoes.

Significant flooding and flash flooding also occurred in portions of the plains, including Elbert, Arapahoe, Adams, Logan, Washington and Morgan counties. There were likely several rural roads that flooded due to the heavy rainfall.  There was a flood fatality just south of I-70 along Watkins Rd.  First responders found two stranded cars swept into a field, but its occupants had either gotten out or had been rescued. The third vehicle ended up west of Watkins and 6th Ave. in what is normally a dry creek bed. South Metroï¿½ï¿½ï¿½s water rescue team was then called out to do a water rescue but that operation turned into a recovery by the following morning.  Due to flooding, Watkins Road was closed between Interstate 70 and Jewell Ave.  Interstate 70 was also closed for several hours until water could recede from flooded underpasses. Minor flooding also occurred in portions of the Denver and the surrounding metro area.  Baseball size hail was observed in Washington County.  In Clear Creek County, a thunderstorm wind gusts to 68 mph was recorded.

Tornado event in WASHINGTON County, COLORADO
Start: 21-JUN-23 15:52:00
End: 21-JUN-23 15:55:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A tornado touched down briefly in open country. No damage was observed.
Episode narrative: A cold front slowly moved across the area while an upper level disturbance passed to the north. Thunderstorms occurred across the region during both the 8th and 9th with a couple storms becoming severe.

Tornado event in ST. LANDRY County, LOUISIANA
Start: 08-FEB-23 19:03:00
End: 08-FEB-23 19:06:00
Direct deaths: 0
Property damage: 100.00K
Event narrative: A National Weather Service storm survey revealed than an EF-1 tornado touched down just south of Highway 107 and tracked northeast for 1.5 miles. The tornado damaged 5 homes and a few outbuildings. Several trees were snapped or uprooted. Maximum winds were estimated at 105 mph.
Episode narrative: The first significant event to produce widespread severe weather across the Mid-South for 2023 occurred on March 24, during the afternoon and evening hours.  This severe weather episode occurred mainly over portions of the Lower Mississippi and Tennessee Valleys. Surface analysis for this day depicted a quasi-stationary boundary from the Mid-Atlantic States and Ohio Valley through northern portions of West Tennessee and Arkansas and stretching back through Central Texas. Low pressure tracked along the stalled front into southeast Missouri during the evening. Meanwhile, a potent mid-level trough ejected out of the southwest U.S. Upper air analysis indicated the Lower Mississippi Valley was in the right entrance region of a strong 300 mb upper-level jet streak. This produced sufficient upper-level divergence and lift needed for severe thunderstorm development. 

Moderate instability combined with strong wind shear resulted in a QLCS (Quasi-Linear Convective System) convective mode. This northern part of the QLCS initially started over Western Arkansas Friday afternoon and moved east into Eastern Arkansas by early evening and then across West Tennessee. The northern part of QLCS produced scattered wind damage, flash flooding, and a weak tornado.  The southern end of this QLCS scraped across north Mississippi with numerous reports of flash flooding, damaging winds, and several weak tornadoes. 

The most significant storm of the night occurred during the late evening hours of March 24, as thunderstorms developing in advance of the QLCS streamed northeast Calhoun and Chickasaw Counties. A tight and small circulation developed in Chickasaw County (MS) about 5 miles east-northeast of Trebloc and quickly grew in strength as it moved into Monroe County (MS), producing significant damage from New Wren to Amory and Smithville, with the most significant damage occurring in Amory.

Tornado event in CHICKASAW County, MISSISSIPPI
Start: 24-MAR-23 21:38:00
End: 24-MAR-23 21:40:00
Direct deaths: 0
Property damage: 20.00K
Event narrative: The tornado began near County Roads 173 and 182 southwest of Egypt in far eastern Chickasaw County. It traveled northeast across County Road 179, causing numerous snapped and uprooted trees. This tornado moved into Monroe County as it crossed Highway 45 near the intersection of Old Houston Road. Peak winds were estimated at 95 mph in Chickasaw County.
Episode narrative: Long duration severe weather event across the northeast plains, and most of the Denver metropolitan area beginning during the early afternoon hours.   Scores of  tornadoes occurred across Washington and Logan counties.  Several rounds of hail across the Denver metro, with ping pong ball sized hail in downtown, larger hail up to 2 inches in diameter at concert in Red Rocks Amphitheatre.  In all, seven patrons were hospitalized,  with 83 treated on scene.   A substantial number of attendees suffered welts, bruises and broken fingers trying to protect themselves.  Several suffered concussions as well.  A total of 33 tornadoes touched down in Washington County, with 3 reported in Logan County.  There were reports of at least one home damaged west of Sterling and one commercial building collapse in Sterling. The home was damaged by one of the tornadoes.

Significant flooding and flash flooding also occurred in portions of the plains, including Elbert, Arapahoe, Adams, Logan, Washington and Morgan counties. There were likely several rural roads that flooded due to the heavy rainfall.  There was a flood fatality just south of I-70 along Watkins Rd.  First responders found two stranded cars swept into a field, but its occupants had either gotten out or had been rescued. The third vehicle ended up west of Watkins and 6th Ave. in what is normally a dry creek bed. South Metroï¿½ï¿½ï¿½s water rescue team was then called out to do a water rescue but that operation turned into a recovery by the following morning.  Due to flooding, Watkins Road was closed between Interstate 70 and Jewell Ave.  Interstate 70 was also closed for several hours until water could recede from flooded underpasses. Minor flooding also occurred in portions of the Denver and the surrounding metro area.  Baseball size hail was observed in Washington County.  In Clear Creek County, a thunderstorm wind gusts to 68 mph was recorded.

Tornado event in WASHINGTON County, COLORADO
Start: 21-JUN-23 15:28:00
End: 21-JUN-23 15:35:00
Direct deaths: 0
Property damage: 15.00K
Event narrative: A large tornado with estimated peak winds to 118 mph, snapped power poles as it crossed Highway 63.
Episode narrative: Scattered severe thunderstorms in advance of low pressure and a cold front produced damaging winds and one strong tornado across portions of southeast Virginia.

Tornado event in VIRGINIA BEACH (C) County, VIRGINIA
Start: 30-APR-23 16:48:00
End: 30-APR-23 16:53:00
Direct deaths: 0
Property damage: 20.00M
Event narrative: A tornado formed over the eastern branch of Lynnhaven River in the City of Virginia Beach. The tornado progressed up River Road as an EF1, passing by the Great Neck Recreation Center. It increased to an EF2 intensity, as it moved into the Chelsea  neighborhood. The tornado continued onto Haversham Close with EF3 intensity. In this area, several homes were shifted off their foundations and roofs and upper walls were completely removed. The tornado then crossed Broad Bay and the eastern portion of Bay Island, clipping Windward Shore Drive as an EF1. It then moved over First Landing State Park and into Fort Story as an EF1, snapping trees, damaging barracks, and damaging several other buildings before moving offshore. Approximately 115 homes were damaged with 11 homes destroyed according to the City of Virginia Beach. Vehicles were overturned and boats were sunk and moved. There were no deaths and no injuries.
Episode narrative: Supercell thunderstorms developed during the afternoon and evening hours mainly east of an Abilene to San Angelo to Sonora line. The sever storms produced large to very large hail and isolated damaging winds. Also, a brief tornado was reported in Fisher County.

Tornado event in FISHER County, TEXAS
Start: 17-JUN-23 17:45:00
End: 17-JUN-23 17:55:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: Law Enforcement reported a tornado 2 miles north of Hitson.
Episode narrative: A regional tornado outbreak occurred during the late afternoon of Friday, March 31, 2023, and continued into the early morning hours of Saturday, April 1, 2023.  This outbreak covered portions of the Ohio Valley, and the Middle and Lower Mississippi Valleys, including a good portion of the Mid-South and stretching into the Tennessee Valley. On Friday, March 31, a surface low was located near La Crosse, WI, with a cold front stretching south into central/southwest Missouri, western Arkansas, and eastern Texas.  Surface temperatures were mainly in the 70s to approaching 80 degrees with surface dewpoints in the lower to middle 60s, yielding Surface-Based CAPE (SBCAPE) values between 1500-2000 J/kg by Friday evening.  Favorable upper-level divergence produced by the right entrance region of a 140-kt jet streak at 300 mb provided ample lift to produce strong to severe thunderstorms across the region.  Directional and speed shear were impressive with 70-80 knots of Effective Bulk Shear present and 0-1 km Storm Relative Helicity values between 500-600 m2/s2, all more than enough for organized thunderstorms across the area. Discrete supercells started to develop across the Lower Mississippi Valley during the afternoon hours on March 31, 2023, eventually tracking into the Mid-South by late afternoon. The first supercell that developed in the Mid-South produced an EF-3 that caused major damage in Wynne, Arkansas. Tornadic supercells continued to produce significant tornado damage across the Mid-South into the early morning hours of April 1, 2023. The hardest hit areas besides Wynne, Arkansas included Covington, Tennessee, and McNairy County, Tennessee. Overall, 14 tornadoes occurred across the Mid-South along with several reports of wind damage and measured damaging wind speeds. Eighteen people in the Mid-South lost their lives in this outbreak.

Tornado event in CROSS County, ARKANSAS
Start: 31-MAR-23 15:30:00
End: 31-MAR-23 16:05:00
Direct deaths: 4
Property damage: 150.00M
Event narrative: NWS meteorologists determined an EF-3 tornado touched down in western Cross County at 431 PM CDT on March 31 on County Road 537, just south of Highway 284. The tornado tracked to the east-northeast towards Wynne, AR where it crossed Highway 284 multiple times. EF-2 damage was observed north of Ellis Chapel and McElroy. Just east northeast of McElroy, significant EF-2 damage to the sewage treatment plant was noted where an 80-yard-long shed with a sturdy roofing structure of metal failed and became lofted. The roofing wadded up and destroyed two cinder block buildings before landing 100 yards away. The tornado strengthened to an EF-3 as it moved into the western section of Wynne, AR. The tornado then ravaged the center of Wynne, including the Wynne High School. Several one and two-family residences in Wynne were partially to completely destroyed. The tornado weakened as it moved away from Wynne and traveled to the north of Parkin, AR where EF-2 damage was observed. The tornado then crossed into Crittenden County. Peak winds in Cross County were estimated at 150 mph.
Episode narrative: The first significant event to produce widespread severe weather across the Mid-South for 2023 occurred on March 24, during the afternoon and evening hours.  This severe weather episode occurred mainly over portions of the Lower Mississippi and Tennessee Valleys. Surface analysis for this day depicted a quasi-stationary boundary from the Mid-Atlantic States and Ohio Valley through northern portions of West Tennessee and Arkansas and stretching back through Central Texas. Low pressure tracked along the stalled front into southeast Missouri during the evening. Meanwhile, a potent mid-level trough ejected out of the southwest U.S. Upper air analysis indicated the Lower Mississippi Valley was in the right entrance region of a strong 300 mb upper-level jet streak. This produced sufficient upper-level divergence and lift needed for severe thunderstorm development. 

Moderate instability combined with strong wind shear resulted in a QLCS (Quasi-Linear Convective System) convective mode. This northern part of the QLCS initially started over Western Arkansas Friday afternoon and moved east into Eastern Arkansas by early evening and then across West Tennessee. The northern part of QLCS produced scattered wind damage, flash flooding, and a weak tornado.  The southern end of this QLCS scraped across north Mississippi with numerous reports of flash flooding, damaging winds, and several weak tornadoes. 

The most significant storm of the night occurred during the late evening hours of March 24, as thunderstorms developing in advance of the QLCS streamed northeast Calhoun and Chickasaw Counties. A tight and small circulation developed in Chickasaw County (MS) about 5 miles east-northeast of Trebloc and quickly grew in strength as it moved into Monroe County (MS), producing significant damage from New Wren to Amory and Smithville, with the most significant damage occurring in Amory.

Tornado event in ITAWAMBA County, MISSISSIPPI
Start: 24-MAR-23 22:04:00
End: 24-MAR-23 22:09:00
Direct deaths: 0
Property damage: 25.00K
Event narrative: A tornado crossed from northern Monroe County into southern Itawamba County. Tree damage became more intermittent as the tornado moved into southern Itawamba County with additional trees down across State Line Road. The tornado finally lifted as it approached Wilson Road. Peak winds were estimated at 90 mph in Itawamba County.
Episode narrative: The approach of an anomalously strong (for mid-June) upper-level disturbance lead to a widespread severe weather outbreak across portions of the forecast area during the afternoon into late evening of the 15th. This included the development of numerous supercell thunderstorms across the area. Despite relatively high cloud bases, strong low-level instability and wind shear aided tornadic outcomes, with a tornado occurring in eastern Clay County. Reports of large hail were also received.

Tornado event in CLAY County, TEXAS
Start: 15-JUN-23 19:02:00
End: 15-JUN-23 19:08:00
Direct deaths: 0
Property damage: 8.00K
Event narrative: Spotters and chasers reported a tornado southeast of Henrietta. This tornado likely developed near New London Road about 2 miles south of US-287. It initially moved southeast, and then east crossing New York Road where a large tree was downed, an outbuilding destroyed and one house received roof damage. Chaser video showed the tornado as a slowly rotating dust column with faster moving subvorticies at times rotating around the primary circulation.