Severe thunderstorms developed ahead of an approaching cold front across southeast Louisiana, southern Mississippi, and the adjacent coastal waters.

Tornado in LIVINGSTON, LOUISIANA
From 07-FEB-17 10:20:00 to 07-FEB-17 10:32:00 (CST-6)
Location: CLIO
Tornado F-scale: EF2
Reported by: NWS Storm Survey

A tornado touched down near the intersection of Carthage Bluff Road and Carthage Lane on the south side of Killian causing minor damage to a home and some trees. As it moved east-northeast along Carthage Bluff Road, it strengthened and snapped or uprooted numerous trees. It continued to strengthen further as it approached Davidson Road. In this area, it is estimated to have reached its peak intensity with winds near 120 mph. It destroyed three barns and destroyed a single family home that had been built on a cinder block foundation. The maximum estimated wind speed is based on this destroyed home which was not secured to the foundation, and also supported by snapped telephone poles in the area. The tornado then moved into a marshy area and continued to snap and uproot numerous trees as it moved into Tangipahoa Parish. Two people were seriously injured in the home that was destroyed on Davidson Road.

Tornado in TANGIPAHOA, LOUISIANA
From 07-FEB-17 10:32:00 to 07-FEB-17 10:52:00 (CST-6)
Location: STRADER
Tornado F-scale: EF2
Reported by: NWS Storm Survey

A large wedge tornado continued on an east-northeast path out of Livingston Parish. While much of the path through Tangipahoa Parish is inaccessible, video evidence shows the tornado was continuously in contact with the ground. The tornado crossed Interstate 55 near mile marker 19. In this area, it snapped an uprooted numerous trees and was approximately 500 yards wide. After crossing the interstate, the tornado continued on its east-northeast path through marshy area and moved into St. Tammany Parish. The maximum intensity in Tangipahoa Parish is estimated to be around 105 mph based on the observed tree damage.

Tornado in ST. TAMMANY, LOUISIANA
From 07-FEB-17 10:52:00 to 07-FEB-17 10:56:00 (CST-6)
Location: HOULTONVILLE
Tornado F-scale: EF2
Reported by: NWS Storm Survey

A tornado continued into St. Tammany Parish from Tangipahoa Parish. It moved in a generally east-northeast direction through uninhabited marsh until it reached the Guste Island area. By the time it reached this area, it had contracted from its maximum width of around 500 yards in Tangipahoa Parish back to around 350 yards. The tornado produced damage consistent with wind speeds around 125 mph as it crossed Chenier Road. It shifted a home from its concrete and rebar piers and caused extensive roof damage to the home. The tornado continued to move east-northeast and dissipated over a marshy area on the southwest side of Madisonville.

Tornado in JEFFERSON, LOUISIANA
From 07-FEB-17 10:51:00 to 07-FEB-17 10:52:00 (CST-6)
Location: SOUTHPORT
Tornado F-scale: EF0
Reported by: NWS Storm Survey

The tornado touched down near Elmwood on St. George Avenue. It moved east northeast causing intermittent tree and roof damage. It lifted near Jefferson Heights around the intersection of Sizeler Avenue and Lauricella Avenue. Maximum wind speeds are estimated around 80 mph.

Tornado in ASCENSION, LOUISIANA
From 07-FEB-17 11:04:00 to 07-FEB-17 11:14:00 (CST-6)
Location: DONALDSONVILLE
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A tornado touched down in Donaldsonville near the intersection of East Bayou Road and Green Gable Road. It damaged the roofs of several homes, and knoced down power lines and trees. It also shifted a small home of its pier foundation. The tornado tracked east-northeast near River Road, damaging a few structures, and continuing to cause damage to trees and power lines before crossing into St. James Parish. Approximately 18 homes were damaged in Ascension Parish.

Tornado in ORLEANS, LOUISIANA
From 07-FEB-17 11:12:00 to 07-FEB-17 11:32:00 (CST-6)
Location: LEE
Tornado F-scale: EF3
Reported by: NWS Storm Survey

A tornado touched down just east of the industrial canal and moved northeast into the Evangeline Oaks Subdivision where it quickly strengthened into a multi-vortex EF-2 tornado. In this area, it snapped several power poles and caused significant roof damage to an apartment complex as well as a building similar to an automobile service building. the tornado then turned toward the east and continued to move almost due east through neighborhoods just north of Chef Menteur Blvd. The worst damage was generally along and just north of Grant Street from Read Blvd to Chalmark Dr. In this area, dozens of homes lost all or large portions of their roof structures. Several homes also had numerous collapsed walls. A few two story homes suffered almost complete destruction of the top floor with the exception of one or two interior corner walls. The tornado also bent at least 3 steel electrical transmission poles. The tornado continued moving toward the east, causing damage to the NASA Michoud facility and a few other industrial buildings in the area, and rolling a rail tanker car east of the Michoud Canal. The track is terminated at Lake Borgne, but the tornado likely continued for some time after that over water. Of the 33 injuries, 5-6 of them were considered serious. Maximum estimated wind speeds were around 150 mph.  In total, the tornado caused moderate to severe damage to 638 homes, of which around half were considered total losses. At least 40 businesses also suffered moderate to severe damage.

Tornado in ST. JAMES, LOUISIANA
From 07-FEB-17 11:14:00 to 07-FEB-17 11:16:00 (CST-6)
Location: SALSBURG
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A tornado moved into St. James Parish from Ascension Parish. It moved nearly due east, affecting small communities on both the west and east bank of the Mississippi River near the Hwy 70 bridge. Damage primarily consisted of roof damage, blown out windows, and down trees and power lines. In St. James Parish, 4 homes were classified as heavily damaged or destroyed, and another 14 were considered to have minor to moderate damage. Maximum estimated winds are estimated to be around 105 mph.  An 83 year old man died as a result of injuries sustained during the tornado. He was outside when his trailer rolled, trapping him between the trailer and a parked truck.

Tornado in LIVINGSTON, LOUISIANA
From 07-FEB-17 12:20:00 to 07-FEB-17 12:21:00 (CST-6)
Location: ALBANY
Tornado F-scale: EF1
Reported by: NWS Storm Survey

A brief tornado touched down near the intersection of Hwy 442 and Greer Lane in far northeastern Livingston Parish. It moved generally east-southeast causing damage snapping numerous trees and causing power poles to lean. It also caused minor roof damage to a home and tore off a metal carport. Maximum wind speeds were estimated around 100 mph.

Tornado in LIVINGSTON, LOUISIANA
From 07-FEB-17 11:50:00 to 07-FEB-17 12:02:00 (CST-6)
Location: WEISS
Tornado F-scale: EF3
Reported by: NWS Storm Survey

The tornado touched down northeast of Watson near  the intersection of Little Woods Drive and Percy Easterly Road. It moved in a general easterly direction. It rapidly strengthened as it approached Nan Wesley Road, where it collapsed a metal truss tower holding up high tension power lines. In this area, the tornado is estimated to have reached its peak intensity of near 140 mph. It continued moving east, causing damage consistent with that of an EF-2 tornado, completely destroying three manufactured homes, and causing significant roof damage to two single family homes. It also snapped or uprooted numerous trees. The tornado continued moving east, causing damage primarily to the roofs of homes and trees. It lifted as it reached John Lanier Road.

Hail in JEFFERSON, LOUISIANA
From 07-FEB-17 10:45:00 to 07-FEB-17 10:45:00 (CST-6)
Location: (MSY)MOISANT FLD NEW
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Relative of NWS employee reported ping pong ball sized hail.

Hail in ORLEANS, LOUISIANA
From 07-FEB-17 11:18:00 to 07-FEB-17 11:18:00 (CST-6)
Location: LEE
Magnitude: 1.50 
Reported by: Public

Ping pong ball sized hail was reported in New Orleans East.

Hail in ST. TAMMANY, LOUISIANA
From 07-FEB-17 13:27:00 to 07-FEB-17 13:27:00 (CST-6)
Location: BUSH
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail slightly larger than golf balls was reported near Bush.

Thunderstorm Wind in ORLEANS, LOUISIANA
From 07-FEB-17 11:22:00 to 07-FEB-17 11:22:00 (CST-6)
Location: (NEW)LKFRNT ARPT NEW
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A WeatherFlow station at New Orleans Lakefront Airport measured a 67 mph wind gust. The strong winds flipped several light air craft parked at the airport.