Louisiana, 2001

Flash Flooding and Flooding in Louisiana, June 5 to 14, 2001

June 5 to 14, 2001 · NWS LIX · 29 events in 16 counties and zones

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.

Where it happened

Every event with a place to put it; 27 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
$13 million
Crop damage
None recorded
Events
29

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS LIX wrote it up.

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.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before the first event at Jun 5, 9:30 AM CST, 3 hours 30 minutes earlier.

Area forecast discussion, Jun 5, 9:30 AM CST, 3 hours 30 minutes before
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In the hours before

Special weather statement, Jun 5, 10:20 AM CST, 2 hours 40 minutes before
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The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

24 flash flood, 5 flood. Local standard time, as filed.

Flood, Orleans

When
June 5, 1:00 PM CST to 6:00 PM CST
Where
Orleans County, New Orleans
Reported by
NEWSPAPER
Coordinates
30.069, -89.928 (the zone’s center; the record gives no point)

Widespread street flooding occurred.

Flash Flood, Terrebonne

When
June 6, 11:15 AM CST to 3:15 PM CST
Where
Terrebonne County, Gibson
Property damage
$75,000
Reported by
EMERGENCY MANAGER
Coordinates
29.337, -90.838 (the zone’s center; the record gives no point)

A few homes were flooded.

Flash Flood, Tangipahoa

When
June 6, 11:55 AM CST to 4:00 PM CST
Where
Tangipahoa County, Countywide
Property damage
$100,000
Reported by
EMERGENCY MANAGER
Coordinates
30.627, -90.406 (the zone’s center; the record gives no point)

Approximately 30 roadways were flooded along with several houses.

Flash Flood, East Baton Rouge

When
June 6, 1:00 PM CST to 5:00 PM CST
Where
East Baton Rouge County, Countywide
Property damage
$100,000
Reported by
EMERGENCY MANAGER
Coordinates
30.538, -91.096 (the zone’s center; the record gives no point)

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

Flash Flood, East Feliciana

When
June 6, 1:00 PM CST to 7:00 PM CST
Where
East Feliciana County, Clinton
Property damage
$30,000
Reported by
EMERGENCY MANAGER
Coordinates
30.845, -91.045 (the zone’s center; the record gives no point)

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

Flash Flood, Livingston

When
June 6, 1:20 PM CST to 5:00 PM CST
Where
Livingston County, Countywide
Property damage
$250,000
Reported by
EMERGENCY MANAGER
Coordinates
30.440, -90.728 (the zone’s center; the record gives no point)

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

Flash Flood, St. Charles

When
June 6, 2:00 PM CST to 7:00 PM CST
Where
St. Charles County, Countywide
Property damage
$50,000
Reported by
NEWSPAPER
Coordinates
29.906, -90.358 (the zone’s center; the record gives no point)

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

Flash Flood, Ascension

When
June 6, 2:00 PM CST to 6:00 PM CST
Where
Ascension County, Countywide
Property damage
$250,000
Reported by
EMERGENCY MANAGER
Coordinates
30.204, -90.911 (the zone’s center; the record gives no point)

Numerous roadways were flooded and more than a dozen houses.

Flash Flood, Iberville

When
June 6, 2:30 PM CST to 6:00 PM CST
Where
Iberville County, Countywide
Property damage
$150,000
Reported by
EMERGENCY MANAGER
Coordinates
30.259, -91.349 (the zone’s center; the record gives no point)

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

Flash Flood, Lafourche

When
June 6, 3:00 PM CST to June 8, 3:00 PM CST
Where
Lafourche County, North Portion
Property damage
$1.5 million
Reported by
EMERGENCY MANAGER
Coordinates
29.500, -90.403 (the zone’s center; the record gives no point)

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

Flash Flood, Jefferson

When
June 6, 3:35 PM CST to 7:00 PM CST
Where
Jefferson County, East Bank
Property damage
$25,000
Reported by
EMERGENCY MANAGER
Coordinates
29.681, -90.098 (the zone’s center; the record gives no point)

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

Flash Flood, St. Tammany

When
June 6, 5:05 PM CST to 9:00 PM CST
Where
St. Tammany County, South Portion
Property damage
$50,000
Reported by
NEWSPAPER
Coordinates
30.409, -89.954 (the zone’s center; the record gives no point)

A few homes and businesses were flooded.

Flash Flood, Terrebonne

When
June 6, 9:00 PM CST to June 7, 9:00 PM CST
Where
Terrebonne County, North Portion
Property damage
$500,000
Reported by
EMERGENCY MANAGER
Coordinates
29.337, -90.838 (the zone’s center; the record gives no point)

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

Flash Flood, St. James

When
June 7, 12:30 AM CST to 10:00 AM CST
Where
St. James County, West Portion
Property damage
$50,000
Reported by
EMERGENCY MANAGER
Coordinates
30.026, -90.796 (the zone’s center; the record gives no point)

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

Flash Flood, West Baton Rouge

When
June 7, 3:00 AM CST to 8:00 AM CST
Where
West Baton Rouge County, Countywide
Property damage
$25,000
Reported by
EMERGENCY MANAGER
Coordinates
30.463, -91.313 (the zone’s center; the record gives no point)

Three homes and several buildings were flooded.

Flood, East Baton Rouge

When
June 7, 6:00 AM CST to June 14, 6:00 AM CST
Where
East Baton Rouge forecast zone
Property damage
$6.0 million
Reported by
EMERGENCY MANAGER
Coordinates
30.538, -91.096 (the zone’s center; the record gives no point)

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

Flood, Ascension

When
June 7, 6:00 AM CST to June 14, 2:00 PM CST
Where
Ascension forecast zone
Property damage
$750,000
Reported by
EMERGENCY MANAGER

Flood, Livingston

When
June 7, 6:00 AM CST to June 14, 2:00 PM CST
Where
Livingston forecast zone
Property damage
$1.5 million
Reported by
EMERGENCY MANAGER

Flood, Iberville

When
June 7, 6:00 AM CST to June 14, 2:00 PM CST
Where
Iberville forecast zone
Property damage
$150,000
Reported by
NEWSPAPER
Coordinates
30.259, -91.349 (the zone’s center; the record gives no point)

Flash Flood, East Baton Rouge

When
June 7, 9:45 AM CST to 6:00 PM CST
Where
East Baton Rouge County, Baton Rouge
Property damage
$150,000
Reported by
EMERGENCY MANAGER
Coordinates
30.538, -91.096 (the zone’s center; the record gives no point)

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

Flash Flood, Livingston

When
June 7, 10:00 AM CST to 4:00 PM CST
Where
Livingston County, Countywide
Property damage
$250,000
Reported by
EMERGENCY MANAGER
Coordinates
30.440, -90.728 (the zone’s center; the record gives no point)

Heavy rainfall caused flooding of roadway and some houses.

Flash Flood, St. Tammany

When
June 7, 12:30 PM CST to 5:30 PM CST
Where
St. Tammany County, South Portion
Property damage
$75,000
Reported by
NEWSPAPER
Coordinates
30.409, -89.954 (the zone’s center; the record gives no point)

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

Flash Flood, Ascension

When
June 7, 1:00 PM CST to 8:00 PM CST
Where
Ascension County, Countywide
Property damage
$250,000
Reported by
EMERGENCY MANAGER
Coordinates
30.204, -90.911 (the zone’s center; the record gives no point)

Numerous roadways were flooded along with several houses.

Flash Flood, Iberville

When
June 7, 1:00 PM CST to 10:00 PM CST
Where
Iberville County, Countywide
Property damage
$150,000
Reported by
EMERGENCY MANAGER
Coordinates
30.259, -91.349 (the zone’s center; the record gives no point)

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

Flash Flood, Assumption

When
June 7, 1:00 PM CST
Where
Assumption County, Countywide
Property damage
$250,000
Reported by
EMERGENCY MANAGER
Coordinates
29.901, -91.063 (the zone’s center; the record gives no point)

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

Flash Flood, Orleans

When
June 7, 2:00 PM CST to 8:00 PM CST
Where
Orleans County, Algiers
Property damage
$25,000
Reported by
EMERGENCY MANAGER
Coordinates
30.069, -89.928 (the zone’s center; the record gives no point)

Severe street flooding occurred and several houses were flooded.

Flash Flood, Jefferson

When
June 7, 3:00 PM CST to 7:00 PM CST
Where
Jefferson County, Gretna
Property damage
$50,000
Reported by
EMERGENCY MANAGER
Coordinates
29.681, -90.098 (the zone’s center; the record gives no point)

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

Flash Flood, Jefferson

When
June 8, 3:00 PM CST to 7:00 PM CST
Where
Jefferson County, North Portion
Property damage
$25,000
Reported by
EMERGENCY MANAGER
Coordinates
29.681, -90.098 (the zone’s center; the record gives no point)

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

Flash Flood, St. John the Baptist

When
June 8, 3:00 PM CST to 8:00 PM CST
Where
St. John the Baptist County, Countywide
Property damage
$125,000
Reported by
EMERGENCY MANAGER
Coordinates
30.127, -90.471 (the zone’s center; the record gives no point)

Numerous streets had severe flooding and some houses were flooded.

What these are

Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Louisiana in 2001Every state in 2001This day in weather historyWarnings in Louisiana, June 2001

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 5256446, 5256439, 5256453, 5256338, 5256513, 5256340, 5256449, 5256451, 5256441, 5256438, 5256443, 5256436, 5256440, 5256448, 5256442, 5256454, 5256508, 5256509, 5256512, 5256339, 5256341, 5256437, 5256452, 5256510, 5256511, 5256447, 5256444, 5256445, 5256450.