A line of thunderstorms ahead of a cold front moving through Louisiana produced many reports of severe weather during the morning and afternoon hours of the 12th.

Tornado in ST. TAMMANY, LOUISIANA
From 12-MAY-17 15:35:00 to 12-MAY-17 15:37:00 (CST-6)
Location: GOODBEE
Tornado F-scale: EF0
Crop damage: 0.00K
Reported by: NWS Storm Survey

A weak tornado produced tree damage was reported in the vicinity of Rainford Oaks Boulevard. Large limbs were blown down and several trees were snapped midway up. A large tree fell through a home. The tornado was rated EF0 with an estimated maximum wind speed of 75 mph. Path width was about 20 yards wide with a path length approximately 0.50 miles long. Event time was estimated by radar.

Thunderstorm Wind in LIVINGSTON, LOUISIANA
From 12-MAY-17 14:15:00 to 12-MAY-17 14:15:00 (CST-6)
Location: LIVINGSTON
Magnitude: 87.00 EG
Crop damage: 0.00K
Reported by: NWS Storm Survey

A large area of powerful straight line winds was reported near Walker. More than 50 large hard and soft wood trees were uprooted or snapped. Utility lines were blown down and there was light to moderate roof damage. Trees were blown down onto cars and parts of houses. There was about a 12 mile damage swath, bounded north/south by US Highway 190 and Louisiana Highway 1024. and bounded east west by Louisiana Highways 16 and 63. Damage in the vicinity of Courtney and Varnado Roads was indicative of winds up to 100 mph.

Tornado in ST. CHARLES, LOUISIANA
From 12-MAY-17 09:37:00 to 12-MAY-17 09:45:00 (CST-6)
Location: GOOD HOPE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A combination of local storm reports and high resolution satellite imagery helped to identify the track of an EF-0 tornado that occurred between Norco and Kenner, LA. This tornado developed near Airline Highway, just east of several refineries. A report of trees and power lines being downed on East Harding St further backed this satellite analysis. Sporadic patches of tree damage were evident on satellite imagery which continued eastward crossing Airline Hwy and into open marsh areas of St. Charles Parish. The most notable swath of tree damage occurred north of the I-310 and Airline Hwy interchange. The tornado then crossed I-310 causing minor vegetation damage near Decatur St. The tornado crossed briefly into Jefferson Parish where it uprooted a single tree and displaced an outdoor shed before lifting.

Tornado in JEFFERSON, LOUISIANA
From 12-MAY-17 09:45:00 to 12-MAY-17 09:48:00 (CST-6)
Location: MOISANT ARPT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A combination of local storm reports and high resolution satellite imagery helped to identify the track of an EF-0 tornado that occurred between Norco and Kenner, LA. This tornado developed near Airline Highway, just east of several refineries. A report of trees and power lines being downed on East Harding St further backed this satellite analysis. Sporadic patches of tree damage were evident on satellite imagery which continued eastward crossing Airline Hwy and into open marsh areas of St. Charles Parish. The most notable swath of tree damage occurred north of the I-310 and Airline Hwy interchange. The tornado then crossed I-310 causing minor vegetation damage near Decatur St. The tornado crossed briefly into Jefferson Parish where it uprooted a single tree and displaced an outdoor shed before lifting.

Hail in EAST BATON ROUGE, LOUISIANA
From 12-MAY-17 14:10:00 to 12-MAY-17 14:10:00 (CST-6)
Location: WHITE HILLS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail ranging from quarter to ping pong ball size occurred in Baker.

Hail in LIVINGSTON, LOUISIANA
From 12-MAY-17 14:33:00 to 12-MAY-17 14:33:00 (CST-6)
Location: LIVINGSTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported quarter size hail and also 45 to 55 mph wind gusts.

Hail in IBERVILLE, LOUISIANA
From 12-MAY-17 15:30:00 to 12-MAY-17 15:30:00 (CST-6)
Location: IBERVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Quarter size hail was reported just outside the city limits of St. Gabriel.

Thunderstorm Wind in ST. CHARLES, LOUISIANA
From 12-MAY-17 09:37:00 to 12-MAY-17 09:37:00 (CST-6)
Location: NORCO
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Three power poles were blown down with lines across Louisiana Highway 627 near the main gate of Valero Refining.

Hail in TANGIPAHOA, LOUISIANA
From 12-MAY-17 14:50:00 to 12-MAY-17 14:50:00 (CST-6)
Location: BAPTIST
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was reported between Albany and Hammond.

Thunderstorm Wind in ST. CHARLES, LOUISIANA
From 12-MAY-17 09:26:00 to 12-MAY-17 09:26:00 (CST-6)
Location: SARPY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown down on Harding Street and brought down power lines.

Thunderstorm Wind in JEFFERSON, LOUISIANA
From 12-MAY-17 09:49:00 to 12-MAY-17 09:49:00 (CST-6)
Location: MOISANT ARPT
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: NWS Storm Survey

An awning and outdoor shed was blown over on the grounds of the airport. Several automobiles in a nearby lot were damaged. A few downed tree limbs were also reported in the area. Event time was based on radar. The nearby automated weather instrument (KMSY - ASOS) at the airport also recorded a 43 knot wind gust about that time.

Thunderstorm Wind in ST. BERNARD, LOUISIANA
From 12-MAY-17 10:36:00 to 12-MAY-17 10:36:00 (CST-6)
Location: ALLUVIAL CITY
Magnitude: 55.00 EG
Crop damage: 0.00K
Reported by: NWS Storm Survey

Minor structural damage was reported with some damage to power poles and power lines in the Shell Beach area . A few small trees were also snapped or uprooted.

Tornado in EAST BATON ROUGE, LOUISIANA
From 12-MAY-17 08:11:00 to 12-MAY-17 08:15:00 (CST-6)
Location: CEDAR CREST
Tornado F-scale: EF1
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief EF-1 tornado caused an intermittent damage path beginning near the intersection of Old Hammond Highway and Cedarcrest Avenue and ending near Sherwood Forest Drive. Several power lines were blown down, several small trees were also snapped and a tree was blown onto a house. A pickup truck was blown over at a gas station as well as another parked car which was captured on security camera video. The driver suffered minor injuries. Numerous other public videos relayed via broadcast media verified the presence of this tornado. The tornado was rated EF-1 with a maximum wind speed estimated around 90 mph. Path width approximately 30 yards wide and path length about 0.6 miles long.

Thunderstorm Wind in TANGIPAHOA, LOUISIANA
From 12-MAY-17 15:02:00 to 12-MAY-17 15:02:00 (CST-6)
Location: HAMMOND
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree fell on a car in Hammond with one minor injury reported.

Thunderstorm Wind in ST. CHARLES, LOUISIANA
From 12-MAY-17 09:38:00 to 12-MAY-17 09:38:00 (CST-6)
Location: SARPY
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were blown down on East Harding Street.

Tornado in IBERVILLE, LOUISIANA
From 12-MAY-17 08:00:00 to 12-MAY-17 08:08:00 (CST-6)
Location: WHITE CASTLE
Tornado F-scale: EF0
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF-0 tornado with maximum sustained winds of 80 mph touched down in the White Castle community near Gleason Street. Large tree limbs were snapped, a small tree trunk was snapped and minor roof damage occurred. The tornado continued over open rural fields and crossed LA Hwy 1 where it caused minor tree damage evident on high resolution satellite imagery. The tornado evidently lifted after crossing into Ascension Parish as corroborated by the weakening tornado vortex signatures on KLIX radar data.

Tornado in JEFFERSON, LOUISIANA
From 12-MAY-17 10:14:00 to 12-MAY-17 10:15:00 (CST-6)
Location: ESTELLE
Tornado F-scale: EF0
Crop damage: 0.00K
Reported by: NWS Storm Survey

Minor property damage was reported with two carports ripped off homes on Mt. Revarb Drive. Rear car windows were also blown out, with tree and power line damage as well. Tornado was rated EF0 with maximum winds of 65 to 70 mph, and a path width of 20-30 yards.