An upper level low pressure system progressed east southeast from the Pacific Northwest into the Central and Southern Rockies on the morning of February 20th, reinforcing a cold front slowly southeast into East Texas and North Louisiana during the morning and afternoon hours on February 21st. A deep southwest flow aloft was present along and behind the front across the Southern Plains and Mississippi Valley, with weak embedded disturbances in the flow helping to enhance the development of scattered to numerous showers and thunderstorms along and behind the front on the 21st. A warm, moist, and weakly unstable air mass had already spread north ahead of the front into Northeast Texas, Southeast Oklahoma, Southwest Arkansas, and North Louisiana, with the southwest flow aloft tapping into the subtropical jet, thus transporting Pacific moisture northeast along and behind the front. Periods of moderate to at times, heavy rainfall fell along and behind the front across North Louisiana, and persisted through the early morning hours on the 23rd before diminishing. Widespread rainfall amounts of four to in excess of eight inches fell across North Louisiana from the morning hours of February 21st through the early morning hours on the 23rd. This resulted in periods of widespread flash flooding across much of North Louisiana during this 3 day period. In addition, isolated severe thunderstorms developed across the southeast sections of Northcentral Louisiana on February 21st within the warm sector along the front, which produced wind damage across Western La Salle Parish.

Flash Flood in OUACHITA, LOUISIANA
From 21-FEB-18 22:00:00 to 22-FEB-18 09:45:00 (CST-6)
Location: PERRYVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water over LA 134 about 1/4 mile east of Swartz Fairbanks Road, Highway 554 in Perryville near the gravel pits, and Barnes Road. Reports from the Ouachita Parish Sherriff's Office Facebook page.

Flash Flood in BIENVILLE, LOUISIANA
From 22-FEB-18 07:50:00 to 22-FEB-18 09:45:00 (CST-6)
Location: PORT BOLIVER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water over the west end of Jot-Em Down Road. Grover Jones Road from Blue Ridge back towards Gibsland was impassable. Iron Bridge Road north and west of Gibsland, Domino Road, Danzy Road, Kenneth Road, CC Road, Castor Creek Road, Guin Road, Shady Grove Road between LA 155 and LA 501 at Fourcher Creek and on the east side of Shady Grove Road, Cabin Creek Road, Pine Grove Road at various culverts, and Danville Road at the Coulee Creek Road bridge were all flooded and closed.

Flash Flood in DE SOTO, LOUISIANA
From 22-FEB-18 23:30:00 to 23-FEB-18 00:15:00 (CST-6)
Location: GRAND CANE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Portions of Grand Cane were flooded.

Flash Flood in LINCOLN, LOUISIANA
From 21-FEB-18 21:05:00 to 22-FEB-18 09:45:00 (CST-6)
Location: CROSSROADS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water covered portions of Virgil, Morrison, Frazier, and Aulds Roads in Lincoln Parish.

Flash Flood in BIENVILLE, LOUISIANA
From 22-FEB-18 06:00:00 to 22-FEB-18 09:45:00 (CST-6)
Location: BRICE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High water covered Highway 9 south of Bienville.

Flash Flood in CADDO, LOUISIANA
From 21-FEB-18 09:20:00 to 21-FEB-18 11:00:00 (CST-6)
Location: SHREVEPORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High water covered Creswell Avenue near Dudley Drive.

Flash Flood in NATCHITOCHES, LOUISIANA
From 21-FEB-18 20:30:00 to 22-FEB-18 09:45:00 (CST-6)
Location: PROVENCAL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several roads throughout Natchitoches Parish were covered in high water.

Flash Flood in BOSSIER, LOUISIANA
From 21-FEB-18 17:13:00 to 21-FEB-18 23:00:00 (CST-6)
Location: BOSSIER CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Shed Road was closed due to flooding.

Flash Flood in LA SALLE, LOUISIANA
From 21-FEB-18 13:13:00 to 21-FEB-18 15:15:00 (CST-6)
Location: TULLOS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway 165 south of Tullos was flooded.

Flash Flood in NATCHITOCHES, LOUISIANA
From 22-FEB-18 05:57:00 to 22-FEB-18 09:45:00 (CST-6)
Location: CLOUTIERVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water covered portions of Highway 491 northeast of Cloutierville.

Flash Flood in BOSSIER, LOUISIANA
From 21-FEB-18 13:00:00 to 21-FEB-18 14:30:00 (CST-6)
Location: ADNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water over Winfield Road.

Flash Flood in BOSSIER, LOUISIANA
From 21-FEB-18 13:11:00 to 21-FEB-18 14:30:00 (CST-6)
Location: LINTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water over Crouch Road.

Flash Flood in DE SOTO, LOUISIANA
From 22-FEB-18 23:45:00 to 23-FEB-18 00:15:00 (CST-6)
Location: FRIERSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding was reported near the intersection of Highway 175 and Interstate 49.

Flash Flood in BOSSIER, LOUISIANA
From 21-FEB-18 17:20:00 to 21-FEB-18 23:00:00 (CST-6)
Location: FOSTERS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The North Gate at Barksdale Air Force Base was closed due to high water.

Flash Flood in CADDO, LOUISIANA
From 21-FEB-18 10:00:00 to 21-FEB-18 11:00:00 (CST-6)
Location: SHREVEPORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

High water covered multiple roads throughout Shreveport.

Flash Flood in WINN, LOUISIANA
From 21-FEB-18 12:04:00 to 21-FEB-18 13:45:00 (CST-6)
Location: JORDON HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water covered Highway 472 at Big Creek in Southern Winn Parish.

Flash Flood in OUACHITA, LOUISIANA
From 21-FEB-18 22:00:00 to 22-FEB-18 09:45:00 (CST-6)
Location: WALL LAKE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water across the 100 block of Forty Oaks Road, the 200 block of Washington Street, Highway 80 near Calhoun, the 300 block of Norris Lane, the 300 block of Blazier Lane, Washington Street and New Natchitoches Road, LA 3033 along Cheniere Lake, the 1000 block of Jonesboro Road, the 2800 and 2900 blocks of New Natchitoches Road, and Edwards Road at Trade Street. The bridge near the 1600 block of Arkansas Road was washed out and closed. The bridge on Cadeville Lodge Road was washed out and closed. High water on Kendallwood Road at Vancil Road, as well as Cox Street and Ridge Drive.

Flash Flood in LINCOLN, LOUISIANA
From 22-FEB-18 11:00:00 to 22-FEB-18 12:45:00 (CST-6)
Location: CROSSROADS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Over 30 roads were flooded and closed throughout Lincoln Parish.

Flash Flood in GRANT, LOUISIANA
From 21-FEB-18 11:00:00 to 21-FEB-18 13:30:00 (CST-6)
Location: MONTGOMERY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water covered several roads across the western portions of Grant Parish.

Flash Flood in GRANT, LOUISIANA
From 21-FEB-18 12:05:00 to 21-FEB-18 13:45:00 (CST-6)
Location: WILLIANA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water covered several roads across the Central portions of Grant Parish.

Flash Flood in JACKSON, LOUISIANA
From 22-FEB-18 08:00:00 to 22-FEB-18 09:45:00 (CST-6)
Location: WOOD JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Chatham Cemetery Road was flooded and closed.

Flash Flood in DE SOTO, LOUISIANA
From 22-FEB-18 23:00:00 to 23-FEB-18 00:15:00 (CST-6)
Location: LOGANSPORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water over Highway 191 just south of Logansport.

Thunderstorm Wind in LA SALLE, LOUISIANA
From 21-FEB-18 12:30:00 to 21-FEB-18 12:30:00 (CST-6)
Location: EDEN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was blown down on Highway 8 near Oilfield Road.