Outer rainbands on the eastern periphery of the circulation of Tropical Storm Allison which moved slowly across southeast Texas affected southeast Louisiana beginning late on June 5th, producing heavy rainfall over much of southeast Louisiana. The areas from Baton Rouge extending south to Thidadaux were particularly hard hit on June 6th and June 7th.  By early June 8th, many location had received 10 to 18 inches of rain. Periods of torrential rain overwhelmed local drainage and created severe ponding of water which flooded numerous roadways and low lying areas, with many houses and some businesses flooded. Northern Lafourche Parish was particularly hard hit by flash flooding and severe ponding of water, with hundreds of houses flooded. Another round of heavy rainfall  developed on June 10 and June 11 as the remnant circulation of Tropical Storm Allison moved over southeast Louisiana and intensified. The flash flooding on those dates is described in separate episode listed below.  Wind and tornado damage caused by Tropical Storm Allison is also included in a separate episode below. By the end of the event on June 11th, storm total rainfall of 15 to 25 inches was common with some location reporting up nearly 30 inches near Thibodaux. Moderate to major river flooding occurred on the lower portions of the  Amite and Comite Rivers with the highest waters levels observed since 1983. Approximately 1800 people were reported to have left their homes in East Baton Rouge Parish due to flooding or the threat of flooding. Hundreds of homes were flooded in East Baton Rouge, Livingston, and Ascension Parishes. Significant flooding also occurred along Bayou Manchac affecting Ascension and Iberville Parishes. A levee broke along Bayou Manchac early on June 11th, flooding considerable low land acreage and roadways cutting off access to many houses.

Flash Flood in IBERVILLE, LOUISIANA
From 06-JUN-01 14:30:00 to 06-JUN-01 18:00:00 (CST)
Location: COUNTYWIDE
Property damage: 150K
Reported by: EMERGENCY MANAGER

Flooding of highways and some buildings occurred in the White Castle and Plaquemine areas.

Flash Flood in EAST BATON ROUGE, LOUISIANA
From 07-JUN-01 09:45:00 to 07-JUN-01 18:00:00 (CST)
Location: BATON ROUGE
Property damage: 150K
Reported by: EMERGENCY MANAGER

Heavy rain caused major flooding of roadways including Interstate Highway 10.

Flash Flood in ST. TAMMANY, LOUISIANA
From 07-JUN-01 12:30:00 to 07-JUN-01 17:30:00 (CST)
Location: SOUTH PORTION
Property damage: 75K
Reported by: NEWSPAPER

A few homes and businesses were flooded along US Highway 190.

Flash Flood in ORLEANS, LOUISIANA
From 07-JUN-01 14:00:00 to 07-JUN-01 20:00:00 (CST)
Location: ALGIERS
Property damage: 25K
Reported by: EMERGENCY MANAGER

Severe street flooding occurred and several houses were flooded.

Flash Flood in TANGIPAHOA, LOUISIANA
From 06-JUN-01 11:55:00 to 06-JUN-01 16:00:00 (CST)
Location: COUNTYWIDE
Property damage: 100K
Reported by: EMERGENCY MANAGER

Approximately 30 roadways were flooded along with several houses.

Flash Flood in WEST BATON ROUGE, LOUISIANA
From 07-JUN-01 03:00:00 to 07-JUN-01 08:00:00 (CST)
Location: COUNTYWIDE
Property damage: 25K
Reported by: EMERGENCY MANAGER

Three homes and several buildings were flooded.

Flash Flood in LIVINGSTON, LOUISIANA
From 06-JUN-01 13:20:00 to 06-JUN-01 17:00:00 (CST)
Location: COUNTYWIDE
Property damage: 250K
Reported by: EMERGENCY MANAGER

Numerous roadways and some houses were flooded due to torrential rainfall.

Flash Flood in LAFOURCHE, LOUISIANA
From 06-JUN-01 15:00:00 to 08-JUN-01 15:00:00 (CST)
Location: NORTH PORTION
Property damage: 1.5M
Reported by: EMERGENCY MANAGER

Heavy rain overwhelmed local drainage and resulted in flooding of several hundred homes. In addition buildings on Nicholls State University were also flooded.

Flood in EAST BATON ROUGE, LOUISIANA
From 07-JUN-01 06:00:00 to 14-JUN-01 06:00:00 (CST)
Property damage: 6M
Reported by: EMERGENCY MANAGER

Heavy rainfall associated with Tropical Storm Allison resulted in major flooding along the Amite and Comite Rivers and associated tributaries.

Flood in LIVINGSTON, LOUISIANA
From 07-JUN-01 06:00:00 to 14-JUN-01 14:00:00 (CST)
Property damage: 1.5M
Reported by: EMERGENCY MANAGER

Flash Flood in JEFFERSON, LOUISIANA
From 08-JUN-01 15:00:00 to 08-JUN-01 19:00:00 (CST)
Location: NORTH PORTION
Property damage: 25K
Reported by: EMERGENCY MANAGER

Severe street and roadway flooding occurred in both east and west bank areas. Some houses were flooded.

Flood in ORLEANS, LOUISIANA
From 05-JUN-01 13:00:00 to 05-JUN-01 18:00:00 (CST)
Location: NEW ORLEANS
Reported by: NEWSPAPER

Widespread street flooding occurred.

Flash Flood in IBERVILLE, LOUISIANA
From 07-JUN-01 13:00:00 to 07-JUN-01 22:00:00 (CST)
Location: COUNTYWIDE
Property damage: 150K
Reported by: EMERGENCY MANAGER

Heavy rain caused flash flooding and flooding in several areas of the parish including along Bayou Sorrell.

Flash Flood in ST. TAMMANY, LOUISIANA
From 06-JUN-01 17:05:00 to 06-JUN-01 21:00:00 (CST)
Location: SOUTH PORTION
Property damage: 50K
Reported by: NEWSPAPER

A few homes and businesses were flooded.

Flash Flood in EAST BATON ROUGE, LOUISIANA
From 06-JUN-01 13:00:00 to 06-JUN-01 17:00:00 (CST)
Location: COUNTYWIDE
Property damage: 100K
Reported by: EMERGENCY MANAGER

Heavy rain caused flash flooding on numerous streams, bayous, and low lying area. Numerous roadways were severely flooded and closed.

Flash Flood in ASSUMPTION, LOUISIANA
From 07-JUN-01 13:00:00 to 07-JUN-01 13:00:00 (CST)
Location: COUNTYWIDE
Property damage: 250K
Reported by: EMERGENCY MANAGER

Flash flooding and flooding of low lying areas including homes was reported.

Flash Flood in TERREBONNE, LOUISIANA
From 06-JUN-01 11:15:00 to 06-JUN-01 15:15:00 (CST)
Location: GIBSON
Property damage: 75K
Reported by: EMERGENCY MANAGER

A few homes were flooded.

Flood in IBERVILLE, LOUISIANA
From 07-JUN-01 06:00:00 to 14-JUN-01 14:00:00 (CST)
Property damage: 150K
Reported by: NEWSPAPER

Flash Flood in ASCENSION, LOUISIANA
From 07-JUN-01 13:00:00 to 07-JUN-01 20:00:00 (CST)
Location: COUNTYWIDE
Property damage: 250K
Reported by: EMERGENCY MANAGER

Numerous roadways were flooded along with several houses.

Flash Flood in JEFFERSON, LOUISIANA
From 06-JUN-01 15:35:00 to 06-JUN-01 19:00:00 (CST)
Location: EAST BANK
Property damage: 25K
Reported by: EMERGENCY MANAGER

Severe street and roadway flooding developed and some houses were also flooded.

Flash Flood in ST. JAMES, LOUISIANA
From 07-JUN-01 00:30:00 to 07-JUN-01 10:00:00 (CST)
Location: WEST PORTION
Property damage: 50K
Reported by: EMERGENCY MANAGER

Flooding of streets and some homes occurred in communities located in the west bank area of the parishes.

Flash Flood in LIVINGSTON, LOUISIANA
From 07-JUN-01 10:00:00 to 07-JUN-01 16:00:00 (CST)
Location: COUNTYWIDE
Property damage: 250K
Reported by: EMERGENCY MANAGER

Heavy rainfall caused flooding of roadway and some houses.

Flood in ASCENSION, LOUISIANA
From 07-JUN-01 06:00:00 to 14-JUN-01 14:00:00 (CST)
Property damage: 750K
Reported by: EMERGENCY MANAGER

Flash Flood in ST. CHARLES, LOUISIANA
From 06-JUN-01 14:00:00 to 06-JUN-01 19:00:00 (CST)
Location: COUNTYWIDE
Property damage: 50K
Reported by: NEWSPAPER

Nine streets were flooded and impassable and around a dozen houses had minor flooding.

Flash Flood in EAST FELICIANA, LOUISIANA
From 06-JUN-01 13:00:00 to 06-JUN-01 19:00:00 (CST)
Location: CLINTON
Property damage: 30K
Reported by: EMERGENCY MANAGER

Heavy rainfall resulted in flooding of 5 to 10 houses in Clinton.

Flash Flood in ST. JOHN THE BAPTIST, LOUISIANA
From 08-JUN-01 15:00:00 to 08-JUN-01 20:00:00 (CST)
Location: COUNTYWIDE
Property damage: 125K
Reported by: EMERGENCY MANAGER

Numerous streets had severe flooding and some houses were flooded.

Flash Flood in ASCENSION, LOUISIANA
From 06-JUN-01 14:00:00 to 06-JUN-01 18:00:00 (CST)
Location: COUNTYWIDE
Property damage: 250K
Reported by: EMERGENCY MANAGER

Numerous roadways were flooded and more than a dozen houses.

Flash Flood in JEFFERSON, LOUISIANA
From 07-JUN-01 15:00:00 to 07-JUN-01 19:00:00 (CST)
Location: GRETNA
Property damage: 50K
Reported by: EMERGENCY MANAGER

Severe street and roadway flooding occurred in the west bank areas. Some houses were also flooded.

Flash Flood in TERREBONNE, LOUISIANA
From 06-JUN-01 21:00:00 to 07-JUN-01 21:00:00 (CST)
Location: NORTH PORTION
Property damage: 500K
Reported by: EMERGENCY MANAGER

Heavy rainfall overwhelmed local drainage and flooded numerous homes. The area around Schriever was heavily impacted by flood waters.