A large upper level low located over the Mid-Mississippi Valley brought widespread moderate to heavy rainfall of 2 to 4 inches to most of Middle Tennessee on April 22, with additional bands of showers and thunderstorms rotating around the upper low dropping 1 to 3 inches of rain in some areas once again on April 23. This additional heavy rain falling on top of already saturated ground caused significant flash flooding in portions of the Nashville metro area during the afternoon hours on April 23.

Flash Flood in SUMNER, TENNESSEE
From 23-APR-18 14:30:00 to 23-APR-18 16:00:00 (CST-6)
Location: MILLERSVILLE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Sumner County Emergency Management and several social media photos and videos showed widespread flash flooding across southwestern Sumner County with several roads flooded and closed. Some roads that were closed due to high water included Hogans Branch Road, Latimer Lane near Long Hollow Pike, and New Hope Road in Hendersonville, as well as Pee Dee Branch Road in Cottontown. One swift water rescue was conducted near New Hope Road at Sandy Valley Road.

Hail in ROBERTSON, TENNESSEE
From 23-APR-18 15:42:00 to 23-APR-18 15:42:00 (CST-6)
Location: COOPERTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A tSpotter Twitter report and photos showed hail up to the size of quarters covered the ground in Cottontown.

Heavy Rain in RUTHERFORD, TENNESSEE
From 23-APR-18 15:45:00 to 23-APR-18 15:45:00 (CST-6)
Location: JAKESTOWN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A tSpotter Twitter report and photo showed 2.5 inches of rain fell in a short time period in southeast Murfreesboro.

Flash Flood in ROBERTSON, TENNESSEE
From 23-APR-18 15:00:00 to 23-APR-18 16:00:00 (CST-6)
Location: WHITE HOUSE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Robertson County Emergency Management reported Honey Run Road was flooded and closed.

Thunderstorm Wind in DAVIDSON, TENNESSEE
From 23-APR-18 13:00:00 to 23-APR-18 13:00:00 (CST-6)
Location: BAKERS
Magnitude: 39.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported and sent a photo of a large tree and power lines down completely blocking the roadway at 2024 Old Baker Road.

Flash Flood in DAVIDSON, TENNESSEE
From 23-APR-18 12:40:00 to 23-APR-18 16:00:00 (CST-6)
Location: LITTLE CREEK
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Davidson County Emergency Management and trained spotters reported widespread flash flooding across northern Davidson County with several roads flooded and closed. Roads that were closed due to high water included Old Springfield Pike, Lickton Pike, Freeman Hollow Road, New Brick Church Pike, Brick Church Pike at Hart Lane, Baker Road at Old Springfield Creek. Several other roads were also flooded in other areas of the Goodlettsville, Union Hill, Lickton Pike, and Bellshire areas. In addition, the Grand Ole RV park on Highway 11 at Old Springfield Pike in Goodlettsville was flooded with several RVs submerged.

Heavy Rain in SUMNER, TENNESSEE
From 23-APR-18 14:34:00 to 23-APR-18 14:59:00 (CST-6)
Location: OCANA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A tSpotter Twitter report indicated 1.57 inches of rain fell in 25 minutes in the Ocana community.

Flash Flood in RUTHERFORD, TENNESSEE
From 23-APR-18 14:45:00 to 23-APR-18 15:45:00 (CST-6)
Location: LEANNA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rutherford County Emergency Management, an NWS employee, and trained spotters reported widespread reports of flash flooding in northern Murfreesboro with several roads flooded and closed. Roads that were closed due to high water included Cherry Lane near Richard Siegel Park, Sulphur Springs Road at Dayna Lane, and Sulphur Springs Road at Shacklett Road where water flooded several yards and got close to a few homes.
- Trained spotter report of street flooding on Cherry Lane by the Richard Siegel Park
- NWS Employee report of water over the roadway at Sulphur Springs Road and Shackeltt Road. Water flooded several yards and ditches,  and looked like it got close to several homes
- Emergency Manager reported roads closed due to flooding at Sulfer Springs and Dayna Lane.