A humid airmass remained in place beneath a west-northwesterly flow aloft. Weak boundaries triggered convection in WNW to ESE oriented bands, some which were anchored to higher terrain. The result was excessive rainfall with training cells.

Flash Flood in ANDERSON, TENNESSEE
From 20-JUL-22 21:30:00 to 20-JUL-22 22:30:00 (EST-5)
Location: CLAXTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Photo posted on social media of water flowing over a road between Claxton and Powell.

Flash Flood in ANDERSON, TENNESSEE
From 20-JUL-22 21:45:00 to 20-JUL-22 23:15:00 (EST-5)
Location: ELZA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Multiple roadways flooded, from back roads to main highways such as Clinton Hwy and Oak Ridge Hwy near Clinton.

Flash Flood in KNOX, TENNESSEE
From 20-JUL-22 23:17:00 to 21-JUL-22 00:45:00 (EST-5)
Location: ARLINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roads near the intersection of I-275 and Heiskell Road were under water.

Flash Flood in KNOX, TENNESSEE
From 20-JUL-22 23:34:00 to 21-JUL-22 01:00:00 (EST-5)
Location: KNOXVILLE
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Car stranded in flood waters near the intersection of Blackstock Ave and Oak Ave.

Flash Flood in KNOX, TENNESSEE
From 21-JUL-22 00:19:00 to 21-JUL-22 01:45:00 (EST-5)
Location: POWELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roads inundated near the intersection of Central Ave and Irwin Dr.

Flash Flood in KNOX, TENNESSEE
From 21-JUL-22 04:06:00 to 21-JUL-22 05:45:00 (EST-5)
Location: POWELL ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Streets flooded near the intersection of West Emory Rd and Collier Rd.

Flash Flood in ANDERSON, TENNESSEE
From 21-JUL-22 04:23:00 to 21-JUL-22 06:00:00 (EST-5)
Location: CLINTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Some homes on Pop Hollow Rd being evacuated.

Heavy Rain in KNOX, TENNESSEE
From 20-JUL-22 06:00:00 to 21-JUL-22 06:00:00 (EST-5)
Location: POWELL ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

CoCoRAHS Station TN-KX-34 Knoxville 5.7 NNW 24 hour rainfall of 5.34 inches.

Heavy Rain in KNOX, TENNESSEE
From 20-JUL-22 07:30:00 to 21-JUL-22 07:30:00 (EST-5)
Location: BELL BRIDGE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet Station BCPT1 Beaver Creek 24 hour rainfall of 5.44 inches.

Heavy Rain in KNOX, TENNESSEE
From 20-JUL-22 08:05:00 to 21-JUL-22 08:05:00 (EST-5)
Location: BELL BRIDGE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet Station AV702 Karns 24 hour rainfall of 6.50 inches.

Heavy Rain in KNOX, TENNESSEE
From 20-JUL-22 08:10:00 to 21-JUL-22 08:10:00 (EST-5)
Location: RIDGEDALE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet Station AS458 Knoxville 24 hour rainfall of 5.30 inches.

Flood in KNOX, TENNESSEE
From 21-JUL-22 08:00:00 to 21-JUL-22 10:00:00 (EST-5)
Location: KNOXVILLE
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Vehicles submerged along 23rd Street. A few residents were rescued from nearby apartments.