An upper low centered over Oklahoma combined with a very unstable airmass which allowed numerous severe thunderstorms to develop over southeast Louisiana during the overnight hours on the 3rd into the 4th and again the following night.

Hail in TERREBONNE, LOUISIANA
From 05-APR-12 03:00:00 to 05-APR-12 03:15:00 (CST-6)
Location: GIBSON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter to half dollar size hail fell between the communities of Boeuf and Gibson, covering the ground in some locations.

Thunderstorm Wind in ORLEANS, LOUISIANA
From 03-APR-12 22:58:00 to 03-APR-12 22:58:00 (CST-6)
Location: GENTILLY
Magnitude: 60.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The roof was blown off of a house at Gentilly Boulevard and Franklin Avenue. Several other homes were also damaged.

Flash Flood in ORLEANS, LOUISIANA
From 03-APR-12 23:30:00 to 04-APR-12 01:30:00 (CST-6)
Location: NEW ORLEANS
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Two to three feet of standing water was reported in sections of Gentilly. Cars were stalled out in the flood water.

Flash Flood in ORLEANS, LOUISIANA
From 04-APR-12 02:54:00 to 04-APR-12 04:00:00 (CST-6)
Location: NEW ORLEANS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Widespread street flooding was reported with several roads impassible and several stalled cars. Standing water was reported on Interstate 10 in some locations, and at least one on ramp was closed due to standing water.

Hail in JEFFERSON, LOUISIANA
From 03-APR-12 21:23:00 to 03-APR-12 21:23:00 (CST-6)
Location: METAIRIE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A storm spotter reported dime to quarter size hail occurring in Metairie between Causeway Boulevard and Bonnabel Boulevard.

Hail in TANGIPAHOA, LOUISIANA
From 03-APR-12 23:40:00 to 03-APR-12 23:40:00 (CST-6)
Location: PONCHATOULA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Lightning in JEFFERSON, LOUISIANA
From 04-APR-12 02:00:00 to 04-APR-12 02:00:00 (CST-6)
Location: SOUTHPORT
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning struck a house near Morris Place and Carol Drive in Old Jefferson, causing a fire.

Flash Flood in JEFFERSON, LOUISIANA
From 04-APR-12 02:54:00 to 04-APR-12 03:30:00 (CST-6)
Location: HARAHAN
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Public reports water entering at least one building near Mark Lane and Citrus Drive in River Ridge.

Hail in WEST FELICIANA, LOUISIANA
From 05-APR-12 01:39:00 to 05-APR-12 01:39:00 (CST-6)
Location: HARDWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

West Feliciana Sheriffs office reported quarter size hail on Highway 61 just north of St. Francisville.

Hail in ST. HELENA, LOUISIANA
From 05-APR-12 03:08:00 to 05-APR-12 03:08:00 (CST-6)
Location: DARLINGTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in TANGIPAHOA, LOUISIANA
From 05-APR-12 04:05:00 to 05-APR-12 04:05:00 (CST-6)
Location: TICKFAW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public