During the daytime hours on March 23rd through March 24th, a deep west coast trough helped to deliver progressive yet strong southwesterly upper-level to mid-level moist flow across the northern Gulf coast. At the surface, a complex of strong to severe thunderstorms approached the area from the west, quickly advancing east causing widespread severe thunderstorms and areas of flash flooding. Another round of thunderstorms developed during the day on March 24th.

Heavy Rain in EAST BATON ROUGE, LOUISIANA
From 23-MAR-21 20:03:00 to 23-MAR-21 20:03:00 (CST-6)
Location: (BTR)RYAN FLD BATON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Asos station kbtr baton rouge measured 2.53 inches of rain in 24 hours.

Flash Flood in ORLEANS, LOUISIANA
From 23-MAR-21 13:00:00 to 23-MAR-21 13:00:00 (CST-6)
Location: VIEUX CARRE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous streets flooded and some impassible. Flooding reported in the following areas of New Orleans: dauphine/iberville, chippewa/third, tchoupitoulas/louisiana, charters/homer, paris/gentilly, haynes/downman, oak/carrollton, poydras/camp, carrollton/maple, carrollton/hampson.

Flash Flood in TERREBONNE, LOUISIANA
From 23-MAR-21 19:31:00 to 23-MAR-21 19:31:00 (CST-6)
Location: HOUMA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall totals of 6-7 estimated. Multiple structures with water in the buildings and multiple roads with water across them at this time.

Hail in EAST FELICIANA, LOUISIANA
From 24-MAR-21 20:08:00 to 24-MAR-21 20:08:00 (CST-6)
Location: JACKSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple reports of quarter size hail around Jackson.

Heavy Rain in ORLEANS, LOUISIANA
From 23-MAR-21 18:56:00 to 23-MAR-21 18:56:00 (CST-6)
Location: ALGIERS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Awos station k7n0 new orleans superdome reported 1 inch or rain in 3 hours.

Heavy Rain in PLAQUEMINES, LOUISIANA
From 23-MAR-21 19:15:00 to 23-MAR-21 19:15:00 (CST-6)
Location: (BVE)BOOTHVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Awos station klnq boothville heliport reported 0.67 inches of rain in 3 hours.

Heavy Rain in PLAQUEMINES, LOUISIANA
From 23-MAR-21 20:02:00 to 23-MAR-21 20:02:00 (CST-6)
Location: (NBG)NAS NEW ORLEANS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Awos station knbg belle chasse measured 5.41 inches of rain in 24 hours.

Heavy Rain in LAFOURCHE, LOUISIANA
From 23-MAR-21 19:28:00 to 23-MAR-21 19:28:00 (CST-6)
Location: MARY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station dw1103 raceland measured 2.31 inches of rain in 3 hours.

Heavy Rain in ST. TAMMANY, LOUISIANA
From 23-MAR-21 19:32:00 to 23-MAR-21 19:32:00 (CST-6)
Location: SLIDELL ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Asos station kasd slidell measured 0.42 inches of rain in 3 hours.

Heavy Rain in TERREBONNE, LOUISIANA
From 23-MAR-21 19:33:00 to 23-MAR-21 19:33:00 (CST-6)
Location: PRESQUE ISLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station ew3858 houma measured 2.57 inches of rain in 3 hours.

Heavy Rain in JEFFERSON, LOUISIANA
From 23-MAR-21 19:34:00 to 23-MAR-21 19:34:00 (CST-6)
Location: (MSY)MOISANT FLD NEW
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Asos station kmsy new orleans intl airport measured 0.89 inches of rain in 3 hours.

Heavy Rain in TERREBONNE, LOUISIANA
From 23-MAR-21 20:18:00 to 23-MAR-21 20:18:00 (CST-6)
Location: PRESQUE ISLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station ew3858 houma measured 10.13 inches of rain in 24 hours.

Heavy Rain in LAFOURCHE, LOUISIANA
From 23-MAR-21 20:19:00 to 23-MAR-21 20:19:00 (CST-6)
Location: MARY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station dw1103 raceland measured 8.68 inches of rain in 24 hours.

Heavy Rain in JEFFERSON, LOUISIANA
From 23-MAR-21 20:18:00 to 23-MAR-21 20:18:00 (CST-6)
Location: TERRYTOWN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station dw6888 gretna measured 6.41 inches of rain in 24 hours.

Heavy Rain in JEFFERSON, LOUISIANA
From 23-MAR-21 20:21:00 to 23-MAR-21 20:21:00 (CST-6)
Location: (MSY)MOISANT FLD NEW
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Asos station kmsy new orleans intl airport measured 4.29 inches of rain in 24 hours.

Heavy Rain in ORLEANS, LOUISIANA
From 23-MAR-21 19:56:00 to 23-MAR-21 19:56:00 (CST-6)
Location: ALGIERS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Awos station k7n0 new orleans superdome measured 3.08 inches of rain in 24 hours.

Heavy Rain in ST. JOHN THE BAPTIST, LOUISIANA
From 23-MAR-21 20:15:00 to 23-MAR-21 20:15:00 (CST-6)
Location: RESERVE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Awos station kaps reserve measured 2.69 inches of rain in 24 hours.

Heavy Rain in ASCENSION, LOUISIANA
From 23-MAR-21 20:15:00 to 23-MAR-21 20:15:00 (CST-6)
Location: BURNSIDE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Awos station kreg gonzales measured 2.66 inches of rain in 24 hours.

Heavy Rain in PLAQUEMINES, LOUISIANA
From 23-MAR-21 18:55:00 to 23-MAR-21 18:55:00 (CST-6)
Location: (NBG)NAS NEW ORLEANS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Awos station knbg belle chasse measured 1.44 inches of rain in 3 hours.

Heavy Rain in LAFOURCHE, LOUISIANA
From 23-MAR-21 19:35:00 to 23-MAR-21 19:35:00 (CST-6)
Location: GALLIANO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Awos station kgao galliano measured 2.31 inches of rain in 3 hours.

Heavy Rain in ST. JOHN THE BAPTIST, LOUISIANA
From 23-MAR-21 19:35:00 to 23-MAR-21 19:35:00 (CST-6)
Location: RESERVE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Awos station kaps reserve measured 0.60 inches of rain in 3 hours.

Heavy Rain in ST. TAMMANY, LOUISIANA
From 23-MAR-21 19:53:00 to 23-MAR-21 19:53:00 (CST-6)
Location: SLIDELL ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Asos station kasd slidell measured a total of 2.39 inches of rain in 24 hours.