torre126/tornado-structure-data huggingface dataset:
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 15:51:00
End: 21-JUN-23 15:52:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A tornado touched down briefly in open country. No damage was observed.
Episode narrative: A stagnant pattern kept warm and unusually humid air anchored across the area which caused the development of a couple severe storms, including one that developed a landspout tornado.

Tornado event in DANIELS County, MONTANA
Start: 01-JUN-23 18:56:00
End: 01-JUN-23 19:06:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: Law enforcement and the public reported a landspout tornado near 8 SW West Fork.  The tornado lasted about 10 minutes, with no visible damage to properties or fields.  With no visible indicators, the length of path and path width were estimated.
Episode narrative: A strong mid-level shortwave rounding the base of a parent low centered across the Great Lakes region encountered an environment displaying a warm and moist airmass, leading to thunderstorm development across the Southeast United States. Thunderstorms congealed into clusters with bowing segments, eventually sweeping through the region within an environment displaying unusually strong mid-level flow, moderate to high levels of instability, strong downdraft convective available potential energy (DCAPE) and low-level backing winds supporting high levels of 0-3 KM storm relative helicity. Severe thunderstorms developed as a result, producing straight-line wind damage and a few tornadoes across southeast Georgia during late afternoon into early evening hours.

Tornado event in EFFINGHAM County, GEORGIA
Start: 14-JUN-23 18:27:00
End: 14-JUN-23 18:35:00
Direct deaths: 0
Event narrative: A National Weather Service Storm Survey Team confirmed an EF-1 tornado with an estimated maximum wind speed of 90 mph south of Tusculum, GA in Effingham County occurring from 627 PM to 635 PM. The tornado began near the intersection of Newton Road and Old Louisville Road with several trees snapped and uprooted. The tornado then tracked through the northern side of Guyton, GA with mostly tree damage, then moved southeast along the northern side of Little McCall Road where it snapped and uprooted multiple trees and removed a small amount of roof fascia and shingles from a couple of homes. The tornado then lifted before reaching Courthouse Road where no damage was observed. Paralleling the tornado track to the south was significant damage caused by straight-line winds from the rear flank downdraft, where snapped and uprooted trees were observed.
Episode narrative: In the early afternoon of the 30th, storms from Colorado crossed into Kansas along I-70. These storms produced heavy rain and small hail, along with two tornadoes before moving into Kansas.  The first tornado was located north of Seibert.  The second tornado was located northwest of Stratton.  Both remained over open country.  No damage was reported with either tornado.

Tornado event in KIT CARSON County, COLORADO
Start: 30-JUN-23 13:19:00
End: 30-JUN-23 13:22:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A brief tornado was reported northwest of Stratton.  Based on radar data the tornado was likely between CR 27 and 29 as it moved southwest.  No damage was reported with this tornado.
Episode narrative: A strong cold front approached the region, with a line of strong showers and thunderstorms developing out ahead of the front. Storms produced damaging winds, tornadoes, and small to medium-sized hail in Pennsylvania.

Tornado event in BUCKS County, PENNSYLVANIA
Start: 01-APR-23 17:46:00
End: 01-APR-23 17:50:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A tornado developed as a line of storms moved through lower Bucks County. Several trees were uprooted and snapped on the south side of Wrightstown Township. As the tornado progressed southeast near Swamp road, additional tree damage occurred in residential areas as well as on the Bucks County Community College Campus. The  maximum estimated wind speed was associated with damage observed on the north side of Newtown where a roof facade was blown over on a portion of a strip mall building. Additional tree damage was observed in downtown Newtown. The continuous path of damage ended in the vicinity of the Newtown Cemetery.
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 into 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 MCNAIRY County, TENNESSEE
Start: 31-MAR-23 20:30:00
End: 31-MAR-23 20:48:00
Direct deaths: 0
Property damage: 350.00K
Event narrative: NWS damage surveys concluded that a tornado touched down just south of Bethel Springs on Main Street around 9:30 PM CDT on the evening of March 31, 2023. The tornado picked up in size and intensity as it moved northeast toward Murray School Road where a double-wide manufactured home was completely destroyed. EF-2 damage continued northeast on Bethel Purdy Road where wooden power poles were snapped. A nearly 5-mile-long swath of EF-1 damage was noted up through Good Hope Church Road where more structures were significantly damaged. EF-2 damage was observed at several locations off Good Hope Church Road, including significant roof damage to a single-family residence along with bent metal electrical transmission poles. Widespread tree damage continued for 10 miles to the northeast consistent with EF-1 wind ratings as the tornado crossed into Hardin County. Peak winds in McNairy County from this tornado were estimated at 115 mph.
Episode narrative: A large closed upper-low was located over the northern Great Plains with a shortwave trough to the south within the sub-tropical jet stream. These features helped bring rich moisture and instability into the region. Widespread strong to severe thunderstorms developed across much of the region. The Permian Basin and the Stockton Plateau were the two main areas of note. Severe winds, large hail. and a brief tornado was observed in this northern complex. To the south, several long-track, cyclic supercells produced tornadoes and very large hail over rural portions of Pecos and Terrell Counties.

Tornado event in PECOS County, TEXAS
Start: 02-JUN-23 14:41:00
End: 02-JUN-23 15:23:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: One eyewitness captured a tornado likely in the dissipating stage roughly 10 miles southwest of Sheffield. It is possible the tornado lasted shorter or longer than the estimated time and may have lifted and touched down at multiple points along the path. The survey team was unable to reach the path of the tornado and no damage indicators were found, thus this tornado is classified as an EF-Unknown. Path width is also estimated.
Episode narrative: A powerful storm system and associated upper trough propagated across the Central Plains into the the Mid-Mississippi Valley. Showers and thunderstorms developed in response to the passing trough triggering strong to severe thunderstorms across Arkansas.

Tornado event in LONOKE County, ARKANSAS
Start: 31-MAR-23 13:47:00
End: 31-MAR-23 13:58:00
Direct deaths: 0
Property damage: 4.29M
Event narrative: This tornado continued from Pulaski County into Lonoke County within Holland Bottoms State Wildlife Area west of Kerr Station Road. Many trees were snapped or uprooted in this wildlife area. 

The tornado exited the wildlife area into the Parnell community, with more roofs damaged and some garages destroyed along Oliver Lane. The tornado crossed Arkansas Highway 89 near Russell Road, destroying a mobile home. The tornado continued into some more rural areas of southeast Cabot, with some damage to a few homes and several more trees uprooted or snapped. The tornado finally lifted between Arkansas Highway 321 and Campground Road west of Laser Lane. This tornado was rated an EF2 with maximum estimated winds of 132 mph within Lonoke County. This tornado tracked for a total distance of 34.2 miles across two counties.
Episode narrative: A strong cold front approached the region, with a line of strong showers and thunderstorms developing out ahead of the front. Storms produced damaging winds, multiple tornadoes, and small to medium-sized hail in New Jersey.

Tornado event in ATLANTIC County, NEW JERSEY
Start: 01-APR-23 18:42:00
End: 01-APR-23 18:43:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A tornado formed along a line of thunderstorms and made an initial touchdown just east of Llewellyn Avenue and south of US HWY 40 in the Richland section of Buena Vista Township. This was a heavily forested area with large branches snapped. The tornado continued east, moving parallel to Landis Avenue, and into Mays Landing. As it  moved into Mays Landing, the tornado produced its strongest wind damage, where a roof was partially lifted off a single-family home.  Numerous trees on the property had large branches broken, with an area of uprooted trees just to the east of the home. 

The tornado continued to progress eastward along Landis Avenue, with large amounts of uprooted trees, snapped trunks, and broken branches. Damage remained mainly confined to the north side of the road. The tornado then crossed Estelle Avenue, where broken branches and snapped trunks continued for about another 200 yards into the  densely forested area.
Episode narrative: Showers and thunderstorms ahead of a strong cold front developed and moved through the region. Storms produced gusty winds, small to medium sized hail, and a tornado in Pennsylvania.

Tornado event in BERKS County, PENNSYLVANIA
Start: 22-APR-23 15:18:00
End: 22-APR-23 15:20:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A tornado began less than a mile southwest of Womelsdorf along PA Route 419 between Memorial Boulevard and Brickplant Road just over the Berks and Lebanon County line where a few old wooden telephone poles were pushed over. The tornado continued northeast through a field toward the Conrad Weiser West Elementary School. A few softwood trees in a tree line were snapped or uprooted along the property line of the field and the school. This is the location where the tornado reached its maximum estimated winds of 90 mph and maximum width of approximately 125 yards. The tornado continued across the school grounds and into a recreational field where a set  of metal bleachers was blown over. The tornado then moved northeast into the central part of Womelsdorf where varying degrees of minor damage occurred to structures and trees, mainly between 3rd Street and 2nd Street as the tornado crossed Cherry Alley, High Street, Mulberry Alley, and Franklin Street. Several homes, garages, and  barns had roofing material blow off, several small trees were uprooted, and numerous downed large tree branches caused some collateral structural damage to some homes and vehicles. The tornadic circulation began to weaken considerably as it crossed 2nd  Street north of Franklin Street near Pear Alley where some additional minor tree damage occurred. The tornado dissipated as it moved into the Womelsdorf Union Cemetery.
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 into 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 TIPTON County, TENNESSEE
Start: 31-MAR-23 16:31:00
End: 31-MAR-23 16:34:00
Direct deaths: 0
Property damage: 20.00K
Event narrative: The tornado that tracked through Wynne, Arkansas eventually moved from through the oxbows of the Mississippi River crossing between Tennessee and Arkansas a couple of times. Significant tree damage along the Mississippi River occurred. As the tornado passed over Corna Lake in Tipton County (the west side of the Mississippi River) and extreme southern Mississippi County, EF- 3 damage was observed. Peak winds were estimated at 145 mph in this part of Tipton County.
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 14:18:00
End: 24-JUN-23 14:26:00
Direct deaths: 0
Event narrative: Someone on twitter sent us a video of a tornado on the ground 6W of Callaway. The tornado occurred in an open field, which mitigated any damage it would have caused. Therefore, EF-U rating assigned with an estimated path length and width.
Episode narrative: A backdoor cold front triggered evening thunderstorms as it moved through.  One of the storms spun up a brief tornado near Hinsdale.

Tornado event in VALLEY County, MONTANA
Start: 09-JUN-23 16:20:00
End: 09-JUN-23 16:21:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: Multiple trained spotters confirmed seeing funnel clouds, one of which was observed touching the ground and lofting a dirt cloud at its base. The tornado lasted for less than 1 minute.
Episode narrative: An upper level storm system via a powerful jet axis moved around the periphery of High Pressure and drove a cold front into a very unstable atmosphere which provided the lifting mechanism for air parcels which would become severe thunderstorms. The cold front arrived during the heating of the day and plenty of CAPE was present to promote powerful updrafts that would suspend large hailstones. The collapsing of storms created a rush of cooler air (outflow) sending other storms downstream that would produce damaging winds. A couple embedded tornadoes were also noted during this period given the favorable atmosphere across central Arkansas.

Tornado event in PULASKI County, ARKANSAS
Start: 25-JUN-23 16:37:00
End: 25-JUN-23 16:38:00
Direct deaths: 0
Event narrative: A few photos of a tornado, all approximately co-located, is likely the only documentation we will have of a tornado that occurred near much stronger and impactful straight line wind damage. The tornado most likely occurred over a remote, heavily treed area within Camp Robinson. Due to widespread wind damage from 80+ mph winds in the area, the damage associated with the weaker spin-off tornado in not detectable. This brief tornado will be classified as an EF-U due to a lack of surveyable evidence. It was likely active for less than one minute.
Episode narrative: A large closed upper-low was located over the northern Great Plains with a shortwave trough to the south within the sub-tropical jet stream. These features helped bring rich moisture and instability into the region. Widespread strong to severe thunderstorms developed across much of the region. The Permian Basin and the Stockton Plateau were the two main areas of note. Severe winds, large hail. and a brief tornado was observed in this northern complex. To the south, several long-track, cyclic supercells produced tornadoes and very large hail over rural portions of Pecos and Terrell Counties.

Tornado event in GAINES County, TEXAS
Start: 02-JUN-23 12:29:00
End: 02-JUN-23 12:30:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: There was no apparent damage from the reported tornado in the location supplied by storm chasers and estimated by radar data. Video evidence from storm chasers shows the tornado lasted only 29 seconds before lifting in a rural area with limited damage indicators. No damage was found, this tornado has been rated EF-Unknown and the time and location of this tornado was estimated by radar data. Path length and width are also estimated.

Tornado event in PECOS County, TEXAS
Start: 02-JUN-23 12:29:00
End: 02-JUN-23 12:39:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A few storm chasers reported a tornado northeast of Fort Stockton that lifted within a few minutes after they spotted it. Their videos and photos were used in conjunction with radar to determine the approximate path and time of this tornado. Due to the rural location and lack of damage indicators, no damage was found and the tornado was rated EF-Unknown. Path width is also estimated.

Tornado event in PECOS County, TEXAS
Start: 02-JUN-23 12:57:00
End: 02-JUN-23 13:15:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A tornado began near the I-10 and Hwy 67 junction east of Fort Stockton in Pecos County. Damage indicators show that the tornado began as an EF-0 before growing in width and strengthening to an EF-1 about 5 minutes after it began. The tornado continued in a southeast direction as an EF-1 before dropping to an EF-0 just before lifting around 20 minutes after it began.
Episode narrative: An EF0 tornado touched down east of Harrisburg, OR. No damages or injury reported.

Tornado event in LINN County, OREGON
Start: 18-JUN-23 12:30:00
End: 18-JUN-23 12:32:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A brief, weak tornado touched down about 5 miles east of Harrisburg, OR, and moved east-northeast across I-5 before dissipating. No damage was reported from this tornado.
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, especially along and west of the I-35 corridor, 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 sufficient low-level wind shear aided tornadic outcomes, with eleven tornadoes confirmed across western into southern Oklahoma. Numerous reports of large to very large hail, including reports of 4-inch hail in Lawton, and wind damage were received across area.

Tornado event in STEPHENS County, OKLAHOMA
Start: 15-JUN-23 16:34:00
End: 15-JUN-23 16:36:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: A storm chaser south of Comanche saw a tornado to the north of Comanche. No damage was reported in this area and the specific tornado path is estimated.

Tornado event in JEFFERSON County, OKLAHOMA
Start: 15-JUN-23 16:58:00
End: 15-JUN-23 17:00:00
Direct deaths: 0
Property damage: 0.00K
Event narrative: Storm chasers both near Waurika and Ryan observed a tornado estimated to be about 3 miles northeast of Sugden. No damage is known to have occurred.