Alert archive / Tennessee / Flash Flood Warnings
Flash Flood Warnings in Tennessee, 2026
162 flash flood warnings in 2026. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Flash Flood Warnings
- 162
- Busiest month
- July69 flash flood warnings
- Busiest day
- July 22, 202616 flash flood warnings
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
103 of 162 flash flood warnings covering Tennessee in 2026 had a flash flood report inside them; 206 of 236 flash flood reports fell inside a warning, on average 67 minutes after it went out.
Tennessee, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 162 | 103 | 36% | 236 | 87% | 67 min |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Huntsville, AL: flash flood warnings | 34 | 19 | 44% | 91 | 73% | 108 min |
| NWS Memphis, TN: flash flood warnings | 27 | 19 | 30% | 50 | 84% | 54 min |
| NWS Morristown, TN: flash flood warnings | 81 | 55 | 32% | 128 | 84% | 70 min |
| NWS Nashville, TN: flash flood warnings | 76 | 41 | 46% | 94 | 93% | 69 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 8:15 PM CDT | Flash Flood Warning | MEG | Shelby | 5 hr |
| Apr 28, 10:30 PM CDT | Flash Flood Warning | MEG | Fayette, Hardeman | 3 hr |
| May 6, 4:50 AM CDT | Flash Flood Warning | MEG | Shelby | 100 min |
| May 24, 6:08 PM CDT | Flash Flood Warning | MRX | Loudon, McMinn, Monroe, Roane | 3 hr |
| May 24, 7:30 PM CDT | Flash Flood Warning | MRX | Blount, Knox | 3 hr |
| May 25, 7:20 PM CDT | Flash Flood Warning | MRX | Sevier | 2 hr |
| May 25, 9:26 PM CDT | Flash Flood Warning | MRX | Hamilton | 2 hr |
| May 28, 4:36 AM CDT | Flash Flood Warning | MRX | Cocke | 9 hr |
| May 28, 6:27 AM CDT | Flash Flood Warning | MRX | Cocke, Greene | 7 hr |
| May 29, 7:59 PM CDT | Flash Flood Warning | MRX | Blount | 4 hr |
| May 29, 8:44 PM CDT | Flash Flood Warning | MEG | Madison | 2 hr |
| May 30, 2:46 AM CDT | Flash Flood Warning | MRX | Greene | 6 hr |
| May 30, 3:25 AM CDT | Flash Flood Warning | MRX | Anderson, Morgan | 6 hr |
| May 30, 4:08 AM CDT | Flash Flood Warning | MRX | Anderson, Campbell, Morgan, Scott | 7 hr |
| May 30, 4:49 AM CDT | Flash Flood Warning | MRX | McMinn | 4 hr |
| May 30, 7:49 AM CDT | Flash Flood Warning | MRX | Morgan | 4 hr |
| May 30, 8:28 AM CDT | Flash Flood Warning | MRX | Blount, Loudon | 3 hr |
| May 31, 5:59 PM CDT | Flash Flood Warning | OHX | Jackson, Overton, Putnam | 2 hr |
| Jun 1, 6:26 PM CDT | Flash Flood Warning | MEG | Shelby | 109 min |
| Jun 7, 11:27 AM CDT | Flash Flood Warning | HUN | Franklin, Lincoln | 7 hr |
| Jun 7, 12:30 PM CDT | Flash Flood Warning | OHX | Lawrence, Wayne | 3 hr |
| Jun 7, 12:47 PM CDT | Flash Flood Warning | HUN | Franklin | 5 hr |
| Jun 8, 3:08 PM CDT | Flash Flood Warning | MRX | Knox, Sevier | 3 hr |
| Jun 8, 4:19 PM CDT | Flash Flood Warning | MRX | Knox | 4 hr |
| Jun 8, 5:30 PM CDT | Flash Flood Warning | MRX | Knox | 4 hr |
| Jun 9, 2:55 PM CDT | Flash Flood Warning | MEG | Henry, Weakley | 2 hr |
| Jun 9, 3:20 PM CDT | Flash Flood Warning | OHX | Robertson, Sumner | 5 hr |
| Jun 9, 4:13 PM CDT | Flash Flood Warning | OHX | Robertson, Sumner | 4 hr |
| Jun 9, 5:07 PM CDT | Flash Flood Warning | OHX | Davidson, Robertson, Rutherford, Sumner, Wilson | 3 hr |
| Jun 12, 10:58 AM CDT | Flash Flood Warning | MEG | Shelby | 4 hr |
| Jun 12, 1:09 PM CDT | Flash Flood Warning | MEG | Fayette, Shelby | 3 hr |
| Jun 13, 6:21 PM CDT | Flash Flood Warning | MEG | Carroll, Gibson, Weakley | 2 hr |
| Jun 13, 6:21 PM CDT | Flash Flood Warning | MEG | Fayette, Haywood, Tipton | 3 hr |
| Jun 13, 6:45 PM CDT | Flash Flood Warning | MEG | Shelby | 2 hr |
| Jun 13, 6:46 PM CDT | Flash Flood Warning | MEG | Shelby | 3 hr |
| Jun 13, 9:28 PM CDT | Flash Flood Warning | OHX | Giles, Marshall | 2 hr |
| Jun 22, 9:47 AM CDT | Flash Flood Warning | MEG | Shelby | 3 hr |
| Jun 28, 12:18 AM CDT | Flash Flood Warning | MRX | Greene, Hancock, Hawkins, Sullivan, Washington | 3 hr |
| Jun 28, 3:03 AM CDT | Flash Flood Warning | MRX | Anderson, Knox, Morgan, Roane | 3 hr |
| Jun 28, 4:22 AM CDT | Flash Flood Warning | MRX | Campbell, Claiborne, Scott | 8 hr |
| Jun 28, 8:08 AM CDT | Flash Flood Warning | MRX | Anderson, Campbell, Grainger, Jefferson, Knox, Sevier and 1 more | 5 hr |
| Jun 28, 8:39 AM CDT | Flash Flood Warning | OHX | Fentress, Pickett | 4 hr |
| Jun 28, 10:26 AM CDT | Flash Flood Warning | MRX | Cocke, Jefferson, Sevier | 2 hr |
| Jul 2, 5:28 PM CDT | Flash Flood Warning | OHX | Montgomery | 2 hr |
| Jul 3, 3:08 PM CDT | Flash Flood Warning | MRX | Hamilton | 3 hr |
| Jul 3, 4:23 PM CDT | Flash Flood Warning | OHX | Davidson, Rutherford, Williamson | 3 hr |
| Jul 3, 5:06 PM CDT | Flash Flood Warning | OHX | Davidson | 3 hr |
| Jul 4, 3:07 PM CDT | Flash Flood Warning | MEG | Fayette, Shelby | 3 hr |
| Jul 4, 10:58 PM CDT | Flash Flood Warning | MRX | Carter, Sullivan | 3 hr |
| Jul 5, 3:28 PM CDT | Flash Flood Warning | MEG | Benton, Carroll, Henry, Weakley | 3 hr |
| Jul 7, 5:02 PM CDT | Flash Flood Warning | MRX | Anderson, Morgan, Scott | 4 hr |
| Jul 7, 7:25 PM CDT | Flash Flood Warning | MRX | Cocke, Sevier | 116 min |
| Jul 7, 7:33 PM CDT | Flash Flood Warning | MRX | Meigs, Rhea | 2 hr |
| Jul 8, 6:01 PM CDT | Flash Flood Warning | OHX | Rutherford, Williamson, Wilson | 3 hr |
| Jul 8, 7:28 PM CDT | Flash Flood Warning | OHX | Davidson, Sumner, Wilson | 3 hr |
| Jul 8, 8:22 PM CDT | Flash Flood Warning | OHX | Smith, Wilson | 3 hr |
| Jul 9, 6:34 PM CDT | Flash Flood Warning | OHX | Giles, Lawrence | 90 min |
| Jul 10, 6:14 AM CDT | Flash Flood Warning | OHX | Davidson | 3 hr |
| Jul 11, 2:02 AM CDT | Flash Flood Warning | MRX | Greene, Unicoi, Washington | 3 hr |
| Jul 11, 7:28 AM CDT | Flash Flood Warning | MRX | Cocke, Greene | 5 hr |
| Jul 11, 8:53 AM CDT | Flash Flood Warning | MRX | Cocke | 3 hr |
| Jul 11, 1:59 PM CDT | Flash Flood Warning | MRX | Greene, Unicoi, Washington | 3 hr |
| Jul 11, 3:22 PM CDT | Flash Flood Warning | OHX | Perry | 2 hr |
| Jul 11, 11:00 PM CDT | Flash Flood Warning | MRX | Anderson, Grainger, Hamblen, Jefferson, Knox, Union | 3 hr |
| Jul 12, 2:10 AM CDT | Flash Flood Warning | MRX | Polk | 3 hr |
| Jul 12, 5:38 AM CDT | Flash Flood Warning | MRX | Hancock | 3 hr |
| Jul 12, 7:18 PM CDT | Flash Flood Warning | MRX | Blount, Knox | 5 hr |
| Jul 13, 12:02 AM CDT | Flash Flood Warning | MRX | Hancock, Hawkins | 3 hr |
| Jul 16, 7:17 PM CDT | Flash Flood Warning | OHX | Overton | 118 min |
| Jul 16, 8:29 PM CDT | Flash Flood Warning | OHX | Rutherford | 2 hr |
| Jul 17, 2:09 PM CDT | Flash Flood Warning | OHX | Lawrence | 3 hr |
| Jul 17, 2:50 PM CDT | Flash Flood Warning | MRX | Anderson, Blount, Knox, Loudon, Roane, Union | 97 min |
| Jul 17, 3:33 PM CDT | Flash Flood Warning | OHX | Cheatham, Davidson, Dickson, Hickman, Maury, Williamson | 3 hr |
| Jul 17, 4:40 PM CDT | Flash Flood Warning | OHX | Cheatham, Dickson, Montgomery, Robertson | 3 hr |
| Jul 17, 5:34 PM CDT | Flash Flood Warning | OHX | Cumberland, Fentress, Overton, Putnam | 2 hr |
| Jul 17, 6:43 PM CDT | Flash Flood Warning | OHX | DeKalb, Jackson, Putnam, Van Buren, White | 3 hr |
| Jul 17, 7:23 PM CDT | Flash Flood Warning | OHX | Clay, Jackson, Overton | 114 min |
| Jul 19, 2:26 PM CDT | Flash Flood Warning | HUN | Lincoln | 3 hr |
| Jul 19, 3:26 PM CDT | Flash Flood Warning | OHX | Lawrence, Wayne | 2 hr |
| Jul 19, 4:39 PM CDT | Flash Flood Warning | OHX | Cumberland | 3 hr |
| Jul 19, 5:08 PM CDT | Flash Flood Warning | OHX | Putnam | 3 hr |
| Jul 19, 5:10 PM CDT | Flash Flood Warning | OHX | Montgomery | 79 min |
| Jul 19, 5:18 PM CDT | Flash Flood Warning | MRX | Bledsoe, Rhea | 117 min |
| Jul 19, 5:59 PM CDT | Flash Flood Warning | OHX | Smith, Trousdale | 91 min |
| Jul 19, 6:42 PM CDT | Flash Flood Warning | MRX | Meigs, Rhea, Roane | 2 hr |
| Jul 19, 6:57 PM CDT | Flash Flood Warning | OHX | Cheatham, Davidson, Williamson | 2 hr |
| Jul 19, 7:30 PM CDT | Flash Flood Warning | OHX | Davidson, Rutherford, Williamson | 2 hr |
| Jul 19, 10:24 PM CDT | Flash Flood Warning | MEG | Madison | 53 min |
| Jul 21, 7:08 PM CDT | Flash Flood Warning | OHX | Macon, Sumner | 4 hr |
| Jul 21, 7:14 PM CDT | Flash Flood Warning | OHX | Clay, Fentress, Jackson, Overton, Pickett | 118 min |
| Jul 21, 7:16 PM CDT | Flash Flood Warning | OHX | Robertson | 6 hr |
| Jul 21, 7:30 PM CDT | Flash Flood Warning | OHX | Sumner, Trousdale | 6 hr |
| Jul 21, 7:37 PM CDT | Flash Flood Warning | OHX | Montgomery | 3 hr |
| Jul 21, 8:01 PM CDT | Flash Flood Warning | OHX | Davidson, Smith, Wilson | 7 hr |
| Jul 21, 8:33 PM CDT | Flash Flood Warning | OHX | Cannon, Rutherford, Williamson | 6 hr |
| Jul 21, 8:45 PM CDT | Flash Flood Warning | OHX | Davidson, Robertson, Sumner, Wilson | 4 hr |
| Jul 21, 9:06 PM CDT | Flash Flood Warning | OHX | Cheatham | 5 hr |
| Jul 21, 9:26 PM CDT | Flash Flood Warning | OHX | Dickson, Hickman | 6 hr |
| Jul 21, 10:43 PM CDT | Flash Flood Warning | OHX | Lewis, Maury, Perry | 5 hr |
| Jul 21, 11:55 PM CDT | Flash Flood Warning | OHX | Maury | 3 hr |
| Jul 22, 12:24 AM CDT | Flash Flood Warning | OHX | Giles, Lawrence, Wayne | 4 hr |
| Jul 22, 12:49 AM CDT | Flash Flood Warning | OHX | Lewis, Perry | 3 hr |
| Jul 22, 8:09 AM CDT | Flash Flood Warning | MRX | Claiborne, Grainger, Greene, Hamblen, Hawkins, Union | 4 hr |
| Jul 22, 9:10 AM CDT | Flash Flood Warning | MRX | Anderson, Campbell, Union | 3 hr |
| Jul 23, 5:27 AM CDT | Flash Flood Warning | MRX | Blount, Monroe | 3 hr |
| Jul 23, 10:14 AM CDT | Flash Flood Warning | MRX | Blount, Monroe | 3 hr |
| Jul 25, 9:32 AM CDT | Flash Flood Warning | OHX | Lawrence, Wayne | 4 hr |
| Jul 25, 10:46 AM CDT | Flash Flood Warning | OHX | Lawrence, Wayne | 3 hr |
| Jul 27, 4:18 AM CDT | Flash Flood Warning | OHX | Lawrence | 3 hr |
| Jul 28, 4:21 PM CDT | Flash Flood Warning | MRX | Carter, Sullivan, Unicoi, Washington | 3 hr |
| Jul 28, 4:34 PM CDT | Flash Flood Warning | MRX | Greene, Hawkins, Unicoi, Washington | 116 min |
| Jul 28, 5:06 PM CDT | Flash Flood Warning | MRX | Carter, Greene, Hawkins, Unicoi, Washington | 114 min |
| Aug 1, 5:52 AM CDT | Flash Flood Warning | OHX | Davidson, Smith, Sumner, Trousdale, Wilson | 3 hr |
| Aug 1, 8:43 AM CDT | Flash Flood Warning | OHX | Smith, Sumner, Trousdale, Wilson | 77 min |
| Aug 1, 10:40 PM CDT | Flash Flood Warning | MRX | Polk | 5 hr |
| Aug 4, 2:05 PM CDT | Flash Flood Warning | MRX | Carter, Sullivan, Unicoi, Washington | 3 hr |
| Aug 5, 4:49 PM CDT | Flash Flood Warning | OHX | Lawrence, Wayne | 3 hr |
| Aug 5, 5:41 PM CDT | Flash Flood Warning | OHX | Lawrence | 2 hr |
| Aug 6, 3:52 PM CDT | Flash Flood Warning | OHX | Cumberland, Fentress, Overton | 62 min |
| Aug 6, 4:44 PM CDT | Flash Flood Warning | OHX | Jackson, Putnam | 2 hr |
| Aug 7, 5:22 PM CDT | Flash Flood Warning | OHX | Davidson, Rutherford, Williamson, Wilson | 4 hr |
| Aug 7, 7:02 PM CDT | Flash Flood Warning | OHX | Marshall, Maury, Rutherford, Williamson | 3 hr |
| Aug 7, 7:17 PM CDT | Flash Flood Warning | OHX | Lawrence | 50 min |
| Aug 8, 12:56 PM CDT | Flash Flood Warning | OHX | Cumberland | 3 hr |
| Aug 8, 1:24 PM CDT | Flash Flood Warning | OHX | Houston, Stewart | 3 hr |
| Aug 8, 2:04 PM CDT | Flash Flood Warning | MEG | Crockett, Haywood, Madison | 3 hr |
| Aug 8, 2:46 PM CDT | Flash Flood Warning | OHX | Giles | 3 hr |
| Aug 8, 3:03 PM CDT | Flash Flood Warning | OHX | Montgomery, Robertson | 3 hr |
| Aug 8, 3:08 PM CDT | Flash Flood Warning | OHX | Davidson, Sumner | 4 hr |
| Aug 8, 3:44 PM CDT | Flash Flood Warning | OHX | Lewis, Perry, Wayne | 3 hr |
| Aug 8, 4:36 PM CDT | Flash Flood Warning | OHX | Maury, Williamson | 4 hr |
| Aug 8, 5:13 PM CDT | Flash Flood Warning | OHX | Williamson | 6 hr |
| Aug 8, 5:19 PM CDT | Flash Flood Warning | OHX | Rutherford, Smith, Wilson | 4 hr |
| Aug 9, 2:47 PM CDT | Flash Flood Warning | MRX | Rhea | 85 min |
| Aug 9, 2:51 PM CDT | Flash Flood Warning | MRX | Campbell | 82 min |
| Aug 9, 3:43 PM CDT | Flash Flood Warning | MRX | Blount, Sevier | 86 min |
| Aug 9, 6:12 PM CDT | Flash Flood Warning | MRX | Carter, Sullivan, Washington | 88 min |
| Aug 11, 4:04 PM CDT | Flash Flood Warning | MRX | Hawkins, Sullivan, Washington | 3 hr |
| Aug 11, 9:00 PM CDT | Flash Flood Warning | MRX | Blount, Knox | 2 hr |
| Aug 11, 9:30 PM CDT | Flash Flood Warning | MRX | Blount, Knox, Sevier | 4 hr |
| Aug 11, 10:34 PM CDT | Flash Flood Warning | MRX | Blount, Knox, Loudon, Monroe, Roane | 3 hr |
| Aug 11, 10:52 PM CDT | Flash Flood Warning | OHX | Davidson, Rutherford, Williamson, Wilson | 3 hr |
| Aug 11, 11:20 PM CDT | Flash Flood Warning | MRX | Bledsoe, Bradley, Hamilton, McMinn, Meigs, Monroe and 2 more | 3 hr |
| Aug 11, 11:40 PM CDT | Flash Flood Warning | OHX | Cannon, Coffee, Rutherford, Warren | 2 hr |
| Aug 12, 6:40 PM CDT | Flash Flood Warning | OHX | Lawrence | 65 min |
| Aug 13, 5:09 PM CDT | Flash Flood Warning | MRX | Cocke, Hamblen, Jefferson | 3 hr |
| Aug 13, 5:16 PM CDT | Flash Flood Warning | MRX | Cocke | 3 hr |
| Aug 14, 12:18 AM CDT | Flash Flood Warning | MRX | Claiborne | 117 min |
| Aug 14, 6:23 PM CDT | Flash Flood Warning | MRX | Sullivan | 3 hr |
| Aug 14, 7:03 PM CDT | Flash Flood Warning | MRX | Johnson, Sullivan | 3 hr |
| Aug 17, 4:18 PM CDT | Flash Flood Warning | MRX | Anderson, Campbell, Knox, Morgan, Scott | 3 hr |
| Aug 17, 4:32 PM CDT | Flash Flood Warning | MRX | Carter, Johnson, Sullivan | 3 hr |
| Aug 20, 4:15 AM CDT | Flash Flood Warning | OHX | Hickman, Humphreys, Lewis, Maury, Perry, Williamson | 4 hr |
| Aug 20, 6:52 AM CDT | Flash Flood Warning | OHX | Montgomery | 3 hr |
| Sep 6, 3:05 AM CDT | Flash Flood Warning | OHX | Cumberland | 3 hr |
| Sep 8, 1:53 PM CDT | Flash Flood Warning | OHX | Wayne | 79 min |
| Sep 19, 2:01 PM CDT | Flash Flood Warning | OHX | Cumberland | 84 min |
| Sep 21, 9:19 PM CDT | Flash Flood Warning | OHX | Cumberland | 5 hr |
| Sep 21, 9:42 PM CDT | Flash Flood Warning | OHX | Jackson, Overton | 3 hr |
| Sep 23, 5:29 PM CDT | Flash Flood Warning | MRX | Knox | 3 hr |
| Sep 23, 7:45 PM CDT | Flash Flood Warning | MRX | Anderson, Knox | 2 hr |
| Sep 23, 8:03 PM CDT | Flash Flood Warning | MRX | Knox | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Knox County16
- Davidson County14
- Lawrence County12
- Williamson County12
- Blount County11
- Rutherford County11
- Wilson County11
- Anderson County10
- Sumner County10
- Shelby County9
- Greene County9
- Sullivan County9
- Washington County9
- Cocke County8
- Wayne County8
- Sevier County7
- Overton County7
- Robertson County7
- Cumberland County7
- Morgan County6
- Campbell County6
- Jackson County6
- Hawkins County6
- Montgomery County6
- Carter County6
- Smith County6
- Unicoi County6
- Maury County6
- Monroe County5
- Roane County5
- Putnam County5
- Union County5
- Rhea County5
- Perry County5
- Fayette County4
- Loudon County4
- Scott County4
- Giles County4
- Jefferson County4
- Fentress County4
41 more counties
- Cheatham County4
- Trousdale County4
- Lewis County4
- McMinn County3
- Hamilton County3
- Madison County3
- Weakley County3
- Hancock County3
- Claiborne County3
- Grainger County3
- Meigs County3
- Hamblen County3
- Polk County3
- Dickson County3
- Hickman County3
- Franklin County2
- Lincoln County2
- Henry County2
- Carroll County2
- Haywood County2
- Marshall County2
- Pickett County2
- Clay County2
- Bledsoe County2
- Cannon County2
- Johnson County2
- Hardeman County1
- Gibson County1
- Tipton County1
- Benton County1
- DeKalb County1
- Van Buren County1
- White County1
- Macon County1
- Houston County1
- Stewart County1
- Crockett County1
- Bradley County1
- Coffee County1
- Warren County1
- Humphreys County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.