A strong upper level low over the southern Rockies aided in the development of surface low pressure over north Texas on the 26th. As this low moved east along a stationary front over Louisiana and Mississippi, a strong line of thunderstorms developed during the early morning hours of the 27th. This line of storms moved rapidly across southeast Louisiana during the daylight hours of the 27th. Numerous reports of thunderstorm wind damage were received, primarily downed trees and power lines. Several meso-cyclones embedded in the southern potion of the squall line spawned weak tornadoes.

Tornado in JEFFERSON, LOUISIANA
From 27-APR-15 09:23:00 to 27-APR-15 09:24:00 (CST-6)
Location: MOISANT ARPT
Tornado F-scale: EF1
Crop damage: 0.00K
Reported by: NWS Storm Survey

A weak tornado., along the leading edge of a squall line,  touched down at the levee of Duncan Canal north of West Esplanade Avenue. Two wooden power poles were bent near an apartment complex. The storm tracked to the east-southeast with mainly light tree damage, and one area of light roof damage on Grandlake Boulevard. The tornado then crossed Canal Number 17, and lifted the roof off of the back porch of a house on Tulane Drive. On the opposite side of Tulane Drive, another house had a small portion of its roof ripped off. The tornado continued to the east-southeast and crossed West Louisiana State Drive and bent over one wooden power pole, and snapped a second one. The tornado then uprooted a hardwood tree in front of a house on West Loyola. The most significant damage occurred at the corner of Loyola and West Esplanade, where multiple wooden power poles and a few trees were snapped. The tornado then quickly lifted as it crossed West Esplanade. In addition to the tornado, sporadic light tree damage occurred south of the track. A large portion of the facade of a hotel on the corner of Loyola and the Interstate 10 Service Road was damaged due to straight line winds.

Thunderstorm Wind in POINTE COUPEE, LOUISIANA
From 27-APR-15 07:45:00 to 27-APR-15 07:45:00 (CST-6)
Location: NEW ROADS
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down in several areas of Pointe Coupee Parish. Three houses and two vehicles were damaged by fallen trees. Event time was estimated from radar.

Thunderstorm Wind in IBERVILLE, LOUISIANA
From 27-APR-15 08:30:00 to 27-APR-15 08:30:00 (CST-6)
Location: PLAQUEMINE
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were reported down in multiple locations across Iberville Parish.

Thunderstorm Wind in ASSUMPTION, LOUISIANA
From 27-APR-15 08:20:00 to 27-APR-15 08:20:00 (CST-6)
Location: MUNSON
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were blown down in many communities in Assumption Parish. Some homes received roof damage. The most concentrated damage was in the Napoleonville and Paincourtville areas. Event time estimated from radar.

Thunderstorm Wind in LIVINGSTON, LOUISIANA
From 27-APR-15 08:30:00 to 27-APR-15 08:30:00 (CST-6)
Location: DENHAM SPGS
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were reported blown down near Julia Road.

Thunderstorm Wind in EAST BATON ROUGE, LOUISIANA
From 27-APR-15 08:15:00 to 27-APR-15 08:15:00 (CST-6)
Location: BROADMOOR
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Broadcast Media

The front door was blown off of a commercial business on Choctaw Drive.

Thunderstorm Wind in TERREBONNE, LOUISIANA
From 27-APR-15 08:40:00 to 27-APR-15 08:40:00 (CST-6)
Location: HOUMA
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were reported blown down in the Houma area.

Thunderstorm Wind in ST. CHARLES, LOUISIANA
From 27-APR-15 09:10:00 to 27-APR-15 09:10:00 (CST-6)
Location: DES ALLEMANDS
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were blown down in Bayou Gauche, Paradis and Des Allemands areas. Power poles were snapped along Louisiana Highways 306 and 632. Event time estimated.

Thunderstorm Wind in TERREBONNE, LOUISIANA
From 27-APR-15 09:10:00 to 27-APR-15 09:10:00 (CST-6)
Location: HOUMA
Magnitude: 55.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees and power poles were blown down by thunderstorm winds. Event time was estimated by radar.

Thunderstorm Wind in JEFFERSON, LOUISIANA
From 27-APR-15 09:28:00 to 27-APR-15 09:28:00 (CST-6)
Location: (MSY)MOISANT FLD NEW
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A wind gust to 61 knots was measured at New Orleans Armstrong Airport.

Thunderstorm Wind in JEFFERSON, LOUISIANA
From 27-APR-15 09:50:00 to 27-APR-15 09:50:00 (CST-6)
Location: GOULDSBORO
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A COOP observer recorded a 66 mph wind gust.

Thunderstorm Wind in JEFFERSON, LOUISIANA
From 27-APR-15 09:35:00 to 27-APR-15 09:35:00 (CST-6)
Location: SOUTHPORT
Magnitude: 80.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Eleven large railcar shipping containers were blown off a train on the east bank approach to the Huey P Long Bridge in the Elmwood area of Metairie. The tracks at the location of the damage were approximately 70 feet above the ground.

Thunderstorm Wind in PLAQUEMINES, LOUISIANA
From 27-APR-15 09:45:00 to 27-APR-15 09:45:00 (CST-6)
Location: (NBG)NAS NEW ORLEANS
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Other Federal Agency

A few trees were reported down and some awnings blown off buildings at Belle Chasse Naval Air Station. A few trees and large branches were also blown down in areas just east of the Naval Air Station.

Thunderstorm Wind in EAST BATON ROUGE, LOUISIANA
From 27-APR-15 08:20:00 to 27-APR-15 08:20:00 (CST-6)
Location: WOODLAWN
Magnitude: 54.00 MG
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a 62 mph wind gust and a wall cloud in the Tiger Bend Road area. A large tree was also reported blown down onto an apartment building in the tiger bend area.

Thunderstorm Wind in LIVINGSTON, LOUISIANA
From 27-APR-15 08:30:00 to 27-APR-15 08:30:00 (CST-6)
Location: DENHAM SPGS
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported roof damage to a commercial building in Denham Springs.

Thunderstorm Wind in WEST BATON ROUGE, LOUISIANA
From 27-APR-15 08:10:00 to 27-APR-15 08:10:00 (CST-6)
Location: OINCLARE
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: NWS Storm Survey

Approximately 10 power poles were damaged along Louisiana Highway 1 south of Port Allen. Event time estimated by radar.

Thunderstorm Wind in EAST BATON ROUGE, LOUISIANA
From 27-APR-15 08:15:00 to 27-APR-15 08:25:00 (CST-6)
Location: UNIVERSITY
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: NWS Storm Survey

Large tree branches and isolated trees were blown down in scattered areas across the Baton Rouge, including areas around the LSU campus.  A man was injured when a tree fell onto the automobile he was driving.

Thunderstorm Wind in ASCENSION, LOUISIANA
From 27-APR-15 08:30:00 to 27-APR-15 08:30:00 (CST-6)
Location: GONZALES
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm wind gusts downed large limbs and trees in several communities in Ascension Parish. Four homes were damaged by fallen trees. Several yard fences were also blown down.

Funnel Cloud in LIVINGSTON, LOUISIANA
From 27-APR-15 17:20:00 to 27-APR-15 17:20:00 (CST-6)
Location: WATSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Received a report of a funnel cloud from the public near Highways 1024 and 1019.

Hail in LIVINGSTON, LOUISIANA
From 27-APR-15 17:25:00 to 27-APR-15 17:25:00 (CST-6)
Location: PORT VINCENT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail was reported near the Port Vincent area.

Thunderstorm Wind in LIVINGSTON, LOUISIANA
From 27-APR-15 08:40:00 to 27-APR-15 08:40:00 (CST-6)
Location: WALKER
Magnitude: 55.00 EG
Crop damage: 0.00K
Reported by: NWS Storm Survey

Large tree limbs and one large tree were blown down by thunderstorm wind gusts.

Tornado in ASSUMPTION, LOUISIANA
From 27-APR-15 08:28:00 to 27-APR-15 08:30:00 (CST-6)
Location: PIERRE PASS
Tornado F-scale: EF0
Crop damage: 0.00K
Reported by: NWS Storm Survey

A mesocyclone embedded in the squall line produced another tornado initially touching down in an area of softwood pine trees west of Bayouside Street. Trees had large branches snapped, and EF-0 damage was noted. The path width was only 25 yards at this point. The tornado then moved to the southeast and crossed Louisiana Highway 402 causing additional EF-0 damage. Several trees had large branches snapped off, and a few trees were uprooted. No visible damage to any structures was noted.  The path width in this area was approximately 75 yards wide. The tornado crossed Louisiana Highway 1 and Bayou Lafourche just south of Hospital Road, causing additional tree damage. The tornado then crossed Louisiana Highway 308 south of Dodge Road, where additional tree damage in the form of large branches removed from hardwood trees was noted. All of this damage was rated EF-0, and the path width narrowed to 25 yards. No damage was noted beyond this point.

Thunderstorm Wind in ST. JAMES, LOUISIANA
From 27-APR-15 08:45:00 to 27-APR-15 08:45:00 (CST-6)
Location: GRAMERCY
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Several power poles were blown down by thunderstorm winds.

Thunderstorm Wind in IBERVILLE, LOUISIANA
From 27-APR-15 08:08:00 to 27-APR-15 08:08:00 (CST-6)
Location: CRESCENT
Magnitude: 90.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Thunderstorm wind gusts damaged two large electrical transmission towers. Several trees were also blown down just northwest of Plaquemine.

Thunderstorm Wind in ORLEANS, LOUISIANA
From 27-APR-15 09:55:00 to 27-APR-15 10:10:00 (CST-6)
Location: NEW ORLEANS
Magnitude: 55.00 EG
Crop damage: 0.00K
Reported by: Broadcast Media

Several trees and large limbs blown were down in scattered locations in New Orleans.

Tornado in LAFOURCHE, LOUISIANA
From 27-APR-15 08:43:00 to 27-APR-15 08:44:00 (CST-6)
Location: CHEGBY
Tornado F-scale: EF1
Crop damage: 0.00K
Reported by: NWS Storm Survey

Another embedded mesocyclone embedded in the squall line produced a tornado. Tree damage was noted across a field west of Louisiana Highway 20, and due to lack of road access, this was determined to be the start point of the tornado. Several large trees were uprooted along the tree line. Damage was noted as EF-1 in this location. The tornado then moved east-southeast across the field, and crossed Louisiana Highway 20 at the intersection with Appletree Drive. EF-1 damage was noted here, and the tornado was approximately 75 yards wide at this point. A small professional building had large portions of siding ripped off and shingles missing from the roof. Trees were uprooted in varying directions in front of the home, and several power poles were snapped at the base in this location. The tornado then moved east-southeast down Appletree Lane and removed a large portion of the shingles from several homes. Several trees were also uprooted and snapped in this area. High end EF-0 and low end EF-1 damage was noted along Appletree Drive. At the end of Appletree Drive, a detached garage collapsed. The tornado then continued into the woods where a path was noted for several more yards with trees uprooted and snapped. The tornado remained 75 yards wide and maintained EF-1 strength as it moved into the woods. It is unknown if the tornado continued further into the woods due to a lack of access.

Tornado in ST. CHARLES, LOUISIANA
From 27-APR-15 09:08:00 to 27-APR-15 09:09:00 (CST-6)
Location: DES ALLEMANDS
Tornado F-scale: EF0
Crop damage: 0.00K
Reported by: NWS Storm Survey

A mesocyclone embedded in the squall line produced a weak tornado. Small trees were uprooted in a field west of Louisiana Highway 306, producing EF-0 damage. Path width was 25 yards wide at this point. The tornado quickly moved to the east-southeast and crossed Highway 306 between Mark and Matthew Streets, where additional large tree branches were snapped from numerous trees. Minor damage to roof coverings was noted along Mark and Matthew Streets. Power poles were also leaning south of Matthew Street. The damage path was 50 yards wide at this point and EF-0 damage was noted. The tornado continued east-southeast, and moved across Shamrock Drive at Edna Street. A home had siding removed and some shingles removed. Trees were also damaged along Edna Street. The tornado was 50 yards wide and produced EF-0 damage along Edna and Shamrock Streets. There was additional tree damage observed beyond the levee behind Shamrock Street, but due to lack of access, this is where the end point of the tornado is noted.

Tornado in ASSUMPTION, LOUISIANA
From 27-APR-15 08:15:00 to 27-APR-15 08:17:00 (CST-6)
Location: PIERRE PASS
Tornado F-scale: EF1
Crop damage: 0.00K
Reported by: NWS Storm Survey

A mesocyclone embedded in the squall line produced a tornado that initially touched d down along a gravel driveway near Derrick Street north of Pierre Part, snapping off large branches along the driveway, producing EF-0 damage. Path width was 50 yards wide at this point. The tornado moved east-southeast and crossed Derrick Street, damaging several homes and snapping hardwood trees. A carport was destroyed on one residence and a porch collapsed on another home. A third home had most of the tin roofing torn off the back of the house. The tornado was rated at EF-1 with a path width of 150 yards. The tornado continued east-southeast, crossing Louisiana Highway 70, paralleling Lee Drive, causing sporadic tree damage along the path and causing minor damage to homes, rating EF-0. The tornado re-intensified to EF-1 near the intersection of Lee Drive and East Drive. A chimney collapsed on one home and another home had a large portion of the tin roof removed with beams exposed. Several large trees were snapped at the base. The width remained 150 yards as it crossed Avoca Island Cutoff Canal, but the tornado weakened back to EF-0 strength as it crossed Grand Coupe Lane. A metal warehouse building had its doors blown inward at this location. The tornado moved into the woods near the end of Noe street where large branches were snapped off. The tornado was still 150 yards wide at this point. No access was available beyond this point, and it is unknown if the tornado remained on the ground beyond the end of Noe Street.