A strong upper level short wave move from west to east across the Central Plains states of the U.S. driving a cold front southeast into the Four State Region. Strong to severe thunderstorms formed in the unstable air mass ahead of the cold front. The front and at least 3 lines of thunderstorms moved through the Four State Region from west to east during the day. Strong low level shear in the atmosphere allowed some thunderstorms to rotate, producing tornadoes with damaging straight line winds producing downbursts.

Thunderstorm Wind in CLAIBORNE, LOUISIANA
From 04-APR-11 09:30:00 to 04-APR-11 09:30:00 (CST-6)
Location: ANTIOCH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree was downed across Cupps Crossing Road northeast of Homer, Louisiana.

Hail in NATCHITOCHES, LOUISIANA
From 04-APR-11 12:38:00 to 04-APR-11 12:38:00 (CST-6)
Location: NATCHITOCHES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in GRANT, LOUISIANA
From 04-APR-11 12:59:00 to 04-APR-11 12:59:00 (CST-6)
Location: MONTGOMERY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple trees downed in Montgomery, Louisiana.

Hail in OUACHITA, LOUISIANA
From 04-APR-11 13:58:00 to 04-APR-11 13:58:00 (CST-6)
Location: PINE GROVE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BOSSIER, LOUISIANA
From 04-APR-11 09:00:00 to 04-APR-11 09:00:00 (CST-6)
Location: FOSTERS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large tree was downed in Bossier City.

Tornado in LA SALLE, LOUISIANA
From 04-APR-11 13:45:00 to 04-APR-11 13:52:00 (CST-6)
Location: ZENORIA
Tornado F-scale: EF1
Property damage: 200.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado was a continuation of the tornado that first touched down in extreme northeastern Grant Parish.  Numerous trees were uprooted/snapped, with some falling on homes as the tornado tore through the Zenoria community before it lifted just northeast of Highway 84 about 5 miles southeast of Tullos. Numerous trees along the path were snapped/uprooted. Falling trees blocked Highway 84. Several homes were damaged when trees fell on/through them. One car was crushed from a falling tree in the Zenoria community. One house directly affected from the tornado in Zenoria had some shingles removed from the roof, with a tin roof of a shop behind the home having been peeled off and thrown forward into some nearby trees.

Tornado in GRANT, LOUISIANA
From 04-APR-11 13:42:00 to 04-APR-11 13:45:00 (CST-6)
Location: ZION
Tornado F-scale: EF1
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado snapped/uprooted many trees and damaged several homes as it touched down just south of Georgetown, LA (Grant Parish), and crossed Highway 165 through the community of Selma into western LaSalle Parish. Numerous trees were uprooted/snapped, with some falling on homes as the tornado tore through the Zenoria community before it lifted just northeast of Highway 84 about 5 miles southeast of Tullos.  Numerous trees along the path were snapped/uprooted. Falling trees blocked Highway 84. Several homes were damaged when trees fell on/through them. One car was crushed from a falling tree in the Zenoria community. One house directly affected from the tornado in Zenoria had some shingles removed from the roof, with a tin roof of a shop behind the home having been peeled off and thrown forward into some nearby trees.

Tornado in LA SALLE, LOUISIANA
From 04-APR-11 13:58:00 to 04-APR-11 14:04:00 (CST-6)
Location: SUMMERVILLE
Tornado F-scale: EF2
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed from the same parent severe thunderstorm that spawned an earlier tornado across Eastern Grant and Western LaSalle parishes. The tornado snapped/uprooted numerous trees as it touched down in a heavily wooded area just south of IP 13 west of Brasher Road (8 miles north of Jena), and remained on the ground crossing Highway 126 and across an unpopulated area in Northeast LaSalle Parish consisting of heavy wooded areas and hunting leases. This tornado intensified as it crossed over into Catahoula Parish a few miles south of the Rosefield community.
Numerous trees along the path were snapped/uprooted. Strong rear flank downdraft wind damage was observed to one home south of the tornado path on Brasher Road. The back portion of the tin roof was peeled off/thrown forward into their front yard, with two trees uprooted across the street. Several trees that were blown down closed Highway 126 and several rural blacktop and gravel roads in the area. One hunting camp east of Highway 126 was heavily damaged as a mobile home was blown down a ravine and destroyed, and a nearby covered travel trailer was blown over on its side. Although EF-1 damage (95-105 mph) was observed with this tornado in Northcentral and Northeast LaSalle Parish, this tornado will be officially classified as an EF-2 as more substantial damage was found as it remained on the ground in Catahoula Parish.