Tornado outbreak of February 7, 2017

Last updated
Tornado outbreak of February 7, 2017
2017 New Orleans tornado near Chef Menteur Highway.png
2017 New Orleans tornado near Chef Menteur Highway
Duration13 hours, 21 minutes
Highest winds
Tornadoes
confirmed
15 [1]
Max. rating1 EF3 tornado
Largest hail2.00 in (5.1 cm) in multiple locations
Fatalities1 fatality, 40 injuries
Damage$175 million (2017 USD) [2]
Areas affected Southeastern United States
Part of the tornadoes of 2017

1Most severe tornado damage; see Enhanced Fujita scale

A small but damaging outbreak of 15 tornadoes impacted the Southeastern United States on February 7, 2017. The most damaging tornado of the outbreak was a large and powerful EF3 tornado. The tornado caused considerable damage along its path and left approximately 10,000 homes without electricity. [3] 33 injuries occurred in the area after the tornado hit near Chef Menteur Highway with hundreds of structures sustaining moderate to significant damage along the ten-mile path. In response to the disaster, Governor John Bel Edwards declared a state of emergency. [4]

Contents

Other destructive and strong tornadoes occurred on this day as well, including an EF1 tornado that killed a man near Donaldsonville, Louisiana and another EF3 tornado that injured three and caused considerable damage to homes, trees, and power lines in Livingston Parish, Louisiana. Overall, the outbreak killed one and injured 40.

Meteorological synopsis

Radar animation of the supercell that spawned the New Orleans tornado. New Orleans Tornado 2017-02-07 1707-1737Z.gif
Radar animation of the supercell that spawned the New Orleans tornado.

On February 4, the Storm Prediction Center (SPC) outlined a severe weather threat area across portions of the Ohio Valley southward into the northern Gulf Coast states. [5] A corresponding Slight risk of severe weather was issued the following day from central Indiana and Ohio to northern Mississippi and Alabama, encompassed within a larger Marginal risk. [6] Little change occurred for the 07:00 UTC Day 2 outlook, [7] but the Marginal risk was eventually shifted to encompass portions of eastern Louisiana on the 17:30 UTC forecast. [8] Early on February 7, the SPC expanded the Slight risk area and subsequently introduced a small Enhanced risk for portions of eastern Louisiana, southern Mississippi, southwestern Alabama, and the extreme western Florida Panhandle, although its intent was for the potential for large hail instead of significant tornadoes. [9] [10]

On February 7, an intensifying southern-stream shortwave trough progressed eastward from the southern Great Plains to the lower Mississippi Valley. [9] Ahead of the trough, strong low- to mid-level winds transported abundant moisture northward from the Gulf of Mexico, with dewpoints reaching to lower to mid 60s °F. [10] The combination of southwesterly flow and abnormally cold mid-level temperatures—approximately −14 to −17 °C (7 to 1 °F)—helped to destabilize the atmosphere, with maximum Convective Available Potential Energy values in the range of 1500–2000 j/kg. Veering winds—winds that turn clockwise with height—acted to lengthen hodographs and provide significant directional wind shear, with 0–6 km shear of 35–45 mph (56–72 km/h) and 0–3 km storm relative helicities of 200–300 m2/s2. [9] [11] Meanwhile, incredibly steep mid-level lapse rates near or above 8 C/km overspread the risk area. [10] The increasingly conducive environment prompted the SPC to issue a tornado watch across southern Louisiana and Mississippi, valid from 7:55 a.m. CST (13:55 UTC) to 2:00 p.m. CST (21:00 UTC); forecasters assessed a 50% chance of two or more tornadoes in the watch box, but only a 20% chance of one or more strong (EF2+) tornadoes. [12]

Confirmed tornadoes

Confirmed tornadoes by Enhanced Fujita rating
EFUEF0EF1EF2EF3EF4EF5Total
056220015

February 7 event

List of confirmed tornadoes – Tuesday, February 7, 2017 [note 1]
EF# LocationCounty / ParishStateStart Coord.Time (UTC)Path lengthMax widthSummary
EF0W of Slayden Houston TN 36°16′44″N87°34′29″W / 36.279024°N 87.574832°W / 36.279024; -87.574832 (Slayden (Feb. 7, EF0)) 15:16–15:170.5 mi (0.80 km)50 yd (46 m)Numerous trees were downed, blocking roadways. Two homes sustained minor exterior damage, two sheds were destroyed, and a carport was collapsed. Several outbuildings sustained significant damage, and outdoor objects were tossed several hundred yards. Total economic damage reached $15,000. [13]
EF2S of Killian to W of Madisonville Livingston, Tangipahoa, St. Tammany LA 30°18′46″N90°35′09″W / 30.3128°N 90.5857°W / 30.3128; -90.5857 (Killian (Feb. 7, EF2)) 16:20–16:5623.04 mi (37.08 km)500 yd (460 m)Large wedge tornado passed near Akers. One single family home had some siding removed while another had its chimney collapsed and some roofing material removed. A small and poorly-constructed house was lifted off of its cinder block foundation and completely destroyed, seriously injuring two occupants. A single family home and a manufactured home sustained minor to moderate damage. Numerous trees were snapped or uprooted, and several sheds or barns were destroyed. The tornado was likely stronger than EF2; however, it primarily traversed marshland and no damage indicators above EF2 were found. [14] [15] [16]
EF0 Metairie Jefferson LA 29°57′40″N90°10′42″W / 29.9611°N 90.1782°W / 29.9611; -90.1782 (Metairie (Feb. 7, EF0)) 16:51–16:520.95 mi (1.53 km)25 yd (23 m)A brief tornado caused minor roof and tree damage in Metarie. [17]
EF1 Donaldsonville to N of Union Ascension, St. James LA 30°05′51″N91°00′18″W / 30.0975°N 91.005°W / 30.0975; -91.005 (Donaldsonville (Feb. 7, EF1)) 17:04–17:166.11 mi (9.83 km)75 yd (69 m)1 death A tornado caused considerable damage in Donaldsonville. A total of 18 homes were affected, of which 14 sustained minor to moderate damage and 4 sustained heavy damage or were destroyed. One small home was shifted off its pier foundation, and several trees and power lines were downed. The fatality occurred when a trailer rolled over onto an elderly man, pinning him to a nearby vehicle. [18] [19]
EF3 New Orleans East to Lake Borgne Orleans LA 30°00′38″N90°00′00″W / 30.0105°N 90.000°W / 30.0105; -90.000 (East New Orleans (Feb. 7, EF3)) 17:12–17:3210.09 mi (16.24 km)600 yd (550 m) See section on this tornado - 33 people were injured.
EF3NW of Watson to SSW of Pine Grove Livingston LA 30°37′16″N90°54′11″W / 30.621°N 90.903°W / 30.621; -90.903 (Watson (Feb. 7, EF3)) 17:50–18:026.43 mi (10.35 km)350 yd (320 m)Numerous trees were snapped and uprooted, and several manufactured homes were completely destroyed. A metal truss tower supporting high tension electrical lines was twisted and collapsed. Frame homes sustained roof damage, and a metal industrial building had most of the exterior wall on one side of the building removed. Three people were injured. [20]
EF1SSE of Montpelier Livingston LA 30°37′59″N90°37′12″W / 30.6331°N 90.62°W / 30.6331; -90.62 (Holden (Feb. 7, EF1)) 18:20–18:210.26 mi (0.42 km)50 yd (46 m)A carport lost some tin roof covering, several trees were snapped, and a telephone pole was leant. [21]
EF0E of Pike Road Montgomery AL 32°16′25″N86°03′11″W / 32.2737°N 86.0530°W / 32.2737; -86.0530 (Pike Road (Feb. 7, EF0)) 19:42–19:430.2 mi (0.32 km)85 yd (78 m)Several trees were snapped or uprooted, and a small garden shed was heavily damaged. [22]
EF0E of Andalusia Covington AL 31°18′51″N86°27′48″W / 31.3141°N 86.4634°W / 31.3141; -86.4634 (Andalusia (Feb. 7, EF0)) 21:23–21:240.51 mi (0.82 km)150 yd (140 m)Several homes sustained shingle damage to their roofs, several trees were toppled, and several campers and RVs were overturned. Numerous water pipes were tossed at the Covington County Water Authority. One person was injured. Total economic damage reached $100,000. [23]
EF1SW of Cataula Harris GA 32°37′24″N84°54′21″W / 32.623435°N 84.905733°W / 32.623435; -84.905733 (Cataula (Feb. 7, EF1)) 21:36–21:392.3 mi (3.7 km)250 yd (230 m)Dozens of trees were snapped or uprooted, and power poles were downed. Total economic damage reached $150,000. [24]
EF2SSW of Harperville Scott MS 32°26′21″N89°31′29″W / 32.4393°N 89.5248°W / 32.4393; -89.5248 (Harperville (Feb. 7, EF2)) 22:07–22:174.83 mi (7.77 km)880 yd (800 m)Multiple flea market buildings, barns, and sheds were destroyed. Several homes sustained damage, while widespread damage to trees and power lines was also observed. Total economic damage reached $350,000. [25]
EF1S of Garlandville Jasper MS 32°09′N89°07′W / 32.15°N 89.12°W / 32.15; -89.12 (Garlandville (Feb. 7, EF1)) 23:23–23:313.09 mi (4.97 km)50 yd (46 m)Several trees were snapped or uprooted, and the roof of a porch sustained damage. Total economic damage reached $100,000. [26]
EF0NW of Cadiz Trigg KY 36°53′03″N87°56′11″W / 36.8842°N 87.9365°W / 36.8842; -87.9365 (Cadiz (Feb. 7, EF0)) 01:40–01:452 mi (3.2 km)50 yd (46 m)At least a dozen trees were broken or uprooted, with one power line partially downed by a fallen tree. Several pieces of metal roofing were ripped from a barn. Total economic damage reached $25,000. [27]
EF1 Lawtey Bradford FL 30°02′46″N82°04′24″W / 30.046°N 82.0734°W / 30.046; -82.0734 (Lawtey (Feb. 7, EF1)) 03:00–03:011 mi (1.6 km)75 yd (69 m)A brief tornado damaged an elementary school and downed numerous trees and power lines. Two people were injured. [28]
EF1S of St. Johns St. Johns FL 29°58′N81°32′W / 29.96°N 81.53°W / 29.96; -81.53 (St. Johns (Feb. 7, EF1)) 03:37–03:400.6 mi (0.97 km)160 yd (150 m)Two homes sustained significant roof and exterior damage. [29]

New Orleans East–Lake Borgne, Louisiana

New Orleans East–Lake Borgne, Louisiana
EF3 tornado
EF3ChurchDamageNewOrleans2017.JPG
EF3 damage to a church in New Orleans East.
Formed11:12 a.m. CST (17:12 UTC) February 7, 2017 [30]
Duration20 minutes
Dissipated11:32 a.m. CST (17:32 UTC) February 7, 2017 [30]
Highest winds
  • 150 mph (240 km/h) [31]
Max. rating1 EF3 tornado
Fatalities33 injuries, 6 serious [30]
Damage$2.7 million (2017 USD)
1Most severe tornado damage; see Enhanced Fujita scale

The tornado initially touched down along Old Gentilly Road to the east of the New Orleans Industrial Canal. EF0 damage was noted at the beginning of the path as homes sustained minor roof damage. EF1 damage occurred near Wilson Avenue as a two-story motel had much of its poorly attached roof uplifted and sustained buckling of exterior walls on the second floor. The tornado moved northeastward, attaining high-end EF2 intensity by the time it reached the Chef Menteur Highway (US 90). Metal power poles were bent, wooden power poles were snapped, a business was severely damaged, and an apartment complex sustained significant roof damage and collapse of a brick fascia exterior wall in this area. Damage surveys indicate that as the tornado continued on this northeastward track, it became multiple-vortex in structure, with a second circulation north of the first taking over as the predominant one. This second vortex, as the tornado did when it originally touched down, moved in a northeastward direction and produced EF2 damage near the Flake Street/Grant Avenue intersection. A small, poorly constructed home along Flake Street was rolled off of its cinder block foundation and completely destroyed, while nearby homes sustained shingle and porch damage. East of Crowder Boulevard, a continuous swath of mainly EF2 damage was noted as the now large and destructive tornado moved through residential areas, severely damaging numerous homes, many of which had their roofs ripped off. A few of these homes sustained some failure of exterior walls. Vehicles in this area were flipped and damaged, some of which were tossed into homes. On Arthur Drive and Charlene Drive, a small pocket of EF3 damage was noted as two homes lost most of their exterior walls, and had one or two of their interior walls collapse due to winds estimated by the NWS to have been around 140 miles per hour (230 km/h). [32]

Damage to vehicles at the National Finance Center. National Finance Center tornado damage 2017-02-08.jpg
Damage to vehicles at the National Finance Center.

Along Grant Street, Schaumburg Elementary School sustained minor roof damage and broken windows as it was impacted by the outer edge of the circulation. Children inside the school took shelter in an interior hallway as the tornado struck and were not injured. Just east of this point, a large area of mid-range EF3 damage was observed. This damage was confined to an area along and just north of Grant Street between Read Boulevard and Chalmark Drive, where dozens of homes lost much to all of their roof structures and sustained collapse of multiple exterior walls. Large, two-story brick homes had only one or two interior corner walls left standing on their top floors, and a two-story apartment building sustained total roof loss and collapse of numerous second floor walls, with some collapse of first floor exterior walls noted as well. It was determined that the tornado reached peak its intensity in this area, with winds estimated at 150 miles per hour (240 km/h). The tornado then caused high-end EF2 damage further to the east as it moved through additional residential areas. Many homes in this area had roofs torn off and sustained some collapse of exterior walls. A second small area of mid-range EF3 damage was noted near Hauck Drive, where a large church was left with only one exterior wall standing, and sustained total collapse of most interior walls. Winds at this location were again estimated around 150 miles per hour (240 km/h). [31]

The tornado essentially followed the Chef Menteur Highway as it continued eastward, significantly damaging homes and other structures at EF2 strength along this segment of the path. A small strip mall and a church sustained major roof damage and had every window blown out. A gas station was also heavily damaged and had its service station canopy shredded. Homes had their roofs completely removed, and many concrete light poles were snapped. A final segment of low-end EF3 damage occurred further east as several large metal power pylons along the highway were bent in half. High-end EF2 damage occurred in neighborhoods just north of the highway, as numerous homes sustained significant roof and exterior wall loss. Past Bullard Avenue, the tornado weakened to EF1 strength and the damage path shifted southward. Numerous small trees were snapped near the I-510 and Almonaster Avenue interchange. The tornado then restrengthened to EF2 intensity as it caused heavy damage to NASA's Michoud Assembly Facility. Windows were blown out, and large metal industrial buildings sustained major structural damage. The large, two-story office building that houses the National Finance Center suffered significant roof damage and collapse of both the brick facade and cinder block exterior walls in a few places. Vehicles in the National Finance Center parking lot were severely damaged. The tornado then continued eastward across unpopulated marshy areas before dissipating over Lake Borgne. [31]

In all, the tornado significantly damaged or destroyed at least 638 homes and 40 businesses along its 10.1-mile-long (16.3 km) path, and hundreds of trees and power poles were snapped. Thirty-three people were injured, six severely; however, no fatalities took place. [31] Two public schools— Schaumburg Elementary and Einstein Charter School—both sustained some damage to buildings and property, with collective damage reaching $1.7 million. [33] NASA's Michoud Assembly Facility suffered more than $1 million in damage. [34] At the time, it was the strongest tornado to strike the New Orleans metropolitan area. However, it would be surpassed on March 22, 2022 by a high-end EF3 tornado, which killed one person and injured multiple others as it caused considerable damage in Arabi. [35] [36]

See also

Notes

  1. All dates are based on the local time zone where the tornado touched down; however, all times are in Coordinated Universal Time for consistency.

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References

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