A pre-frontal trough of low pressure triggered the development of slow moving thunderstorms near the Atchafalaya River basin during the late evening hours of the 21st and the early morning hours of the 22nd. This produced very heavy rainfall and some flooding in the basin.
The trailing cold front produced another band of showers and thunderstorms during the morning hours of the 22nd. This front swept across southeast Louisiana, southern Mississippi and the adjacent coastal waters during the late morning and early afternoon of the 22nd, producing numerous reports of wind damage.

Flash Flood in POINTE COUPEE, LOUISIANA
From 21-OCT-17 22:00:00 to 22-OCT-17 00:00:00 (CST-6)
Location: TORBERT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Local media reported residential flooding occurring near Torbert in the vicinity of US Highway 190 and Manda Road.

Thunderstorm Wind in JEFFERSON, LOUISIANA
From 22-OCT-17 11:11:00 to 22-OCT-17 11:11:00 (CST-6)
Location: TERRYTOWN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Jefferson Parish Emergency Manager reported an apartment building's siding was damaged and a utility pole was knocked down at Lorene Drive in Harvey.

Heavy Rain in IBERVILLE, LOUISIANA
From 21-OCT-17 17:50:00 to 21-OCT-17 20:50:00 (CST-6)
Location: MARINGOUIN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Minor street flooding of a few streets in the Ridgewood Subdivision of Maringouin occurred. Radar estimated almost 6 inches of rain in that area over a 3 hour period.

Thunderstorm Wind in ST. CHARLES, LOUISIANA
From 22-OCT-17 10:42:00 to 22-OCT-17 10:42:00 (CST-6)
Location: LULING ARPT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were reported blown down in Luling.

Flash Flood in EAST FELICIANA, LOUISIANA
From 22-OCT-17 06:00:00 to 22-OCT-17 10:00:00 (CST-6)
Location: SLAUGHTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Louisiana Highways 19, 955 and 956 all flooded during this event. Two bridges and 5 large 70 inch culverts were washed out. There were 500 911 calls, and 25 to 30 boat rescues took place. Approximately 25 residences were flooded.

Heavy Rain in EAST BATON ROUGE, LOUISIANA
From 21-OCT-17 06:00:00 to 22-OCT-17 06:00:00 (CST-6)
Location: PORT HUDSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A COCORAHS site 6 miles west-northwest of Zachary measured 5.24 inches of rain in a 24 hour period.

Heavy Rain in POINTE COUPEE, LOUISIANA
From 21-OCT-17 06:00:00 to 22-OCT-17 06:00:00 (CST-6)
Location: NEW ROADS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

A 24 hour rainfall total at New Roads Airport of 9.64 inches. Most of the rain fell between 8 pm CDT and 4 am CDT.

Heavy Rain in WEST FELICIANA, LOUISIANA
From 21-OCT-17 06:00:00 to 22-OCT-17 06:00:00 (CST-6)
Location: ST FRANCISVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

The 7 am 24 hour rainfall total from an Army Corps of Engineers site at St. Francisville was 7.37 inches, most falling during the overnight period.

Thunderstorm Wind in EAST BATON ROUGE, LOUISIANA
From 22-OCT-17 09:24:00 to 22-OCT-17 09:24:00 (CST-6)
Location: BROWNFIELDS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was reported blown down by thunderstorm winds on Plank Road.

Thunderstorm Wind in EAST BATON ROUGE, LOUISIANA
From 22-OCT-17 09:38:00 to 22-OCT-17 09:38:00 (CST-6)
Location: COMITE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A power line was reported blown down on Mapleton Drive.

Thunderstorm Wind in EAST BATON ROUGE, LOUISIANA
From 22-OCT-17 09:42:00 to 22-OCT-17 09:42:00 (CST-6)
Location: FRED
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A power line was reported blown down on Machost Road near Zachary.

Heavy Rain in WEST FELICIANA, LOUISIANA
From 21-OCT-17 06:40:00 to 22-OCT-17 06:40:00 (CST-6)
Location: WAKEFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A 24 hour rainfall total of 7.68 inches was received from a COCORAHS observer 1 mile west-northwest of Wakefield.

Thunderstorm Wind in ST. JOHN THE BAPTIST, LOUISIANA
From 22-OCT-17 10:30:00 to 22-OCT-17 10:30:00 (CST-6)
Location: LA PLACE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power lines were reported blown down along US Highway 51 in LaPlace. Event time was estimated from radar.

Flash Flood in POINTE COUPEE, LOUISIANA
From 21-OCT-17 22:18:00 to 22-OCT-17 00:00:00 (CST-6)
Location: TORBERT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Pointe Coupee Emergency Manager reported multiple road closures from the New Roads area to Livonia due to flash flooding.

Flash Flood in POINTE COUPEE, LOUISIANA
From 22-OCT-17 09:30:00 to 22-OCT-17 12:00:00 (CST-6)
Location: ISLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding was reported in eastern Pointe Coupee Parish near New Roads. Several roads were flooded and closed, including Pecan Drive, Louisiana Highway 1 and Jack Torres Road. Residents evacuated several homes in those areas due to high water. Approximately 80 homes were affected by floodwaters across Pointe Coupee Parish.

Flash Flood in WEST FELICIANA, LOUISIANA
From 22-OCT-17 06:15:00 to 22-OCT-17 09:00:00 (CST-6)
Location: ST FRANCISVILLE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding was reported due to heavy rain overnight across the Thompson Creek watershed near the West and East Feliciana Parish border. US Highway 61 and Louisiana Highway 10 were closed at Thompson Creek, as well as other local roads. Several water rescues occurred. Three bridges were reported washed out by floodwaters.