Alert archive / Tennessee / Flash Flood Warnings
Flash Flood Warnings in Tennessee, 2019
106 flash flood warnings in 2019. 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 2019. Tap one for its archive.
- Flash Flood Warnings
- 106
- Busiest month
- February49 flash flood warnings
- Busiest day
- February 23, 201923 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.
65 of 106 flash flood warnings covering Tennessee in 2019 had a flash flood report inside them; 177 of 256 flash flood reports fell inside a warning, on average 83 minutes after it went out.
Tennessee, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Flash flood warnings | 106 | 65 | 39% | 256 | 69% | 83 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Atlanta, GA: flash flood warnings | 34 | 15 | 56% | 39 | 74% | 138 min |
| NWS Memphis, TN: flash flood warnings | 47 | 16 | 66% | 50 | 58% | 69 min |
| NWS Nashville, TN: flash flood warnings | 63 | 45 | 29% | 178 | 79% | 92 min |
| NWS Huntsville, AL: flash flood warnings | 27 | 8 | 70% | 60 | 47% | 72 min |
| NWS Morristown, TN: flash flood warnings | 24 | 12 | 50% | 37 | 51% | 36 min |
An office's figures cover every county it serves, including across state lines.
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 |
|---|---|---|---|---|
| Feb 6, 4:33 PM CST | Flash Flood Warning | OHX | Dickson, Hickman, Humphreys | 117 min |
| Feb 6, 5:03 PM CST | Flash Flood Warning | OHX | Cheatham, Davidson | 3 hr |
| Feb 6, 6:14 PM CST | Flash Flood Warning | MEG | Carroll, Crockett, Gibson, Haywood, Madison | 3 hr |
| Feb 6, 6:14 PM CST | Flash Flood Warning | OHX | Wilson | 2 hr |
| Feb 6, 6:37 PM CST | Flash Flood Warning | OHX | Wilson | 113 min |
| Feb 6, 6:53 PM CST | Flash Flood Warning | MRX | Anderson, Campbell, Claiborne, Grainger, Union | 3 hr |
| Feb 6, 7:14 PM CST | Flash Flood Warning | OHX | Dickson, Hickman, Humphreys | 6 hr |
| Feb 6, 7:45 PM CST | Flash Flood Warning | OHX | Cheatham, Davidson, Dickson, Sumner, Williamson | 4 hr |
| Feb 6, 8:04 PM CST | Flash Flood Warning | OHX | Davidson, Rutherford, Wilson | 3 hr |
| Feb 6, 8:09 PM CST | Flash Flood Warning | MRX | Grainger, Hamblen, Hawkins, Jefferson, Knox | 3 hr |
| Feb 6, 8:30 PM CST | Flash Flood Warning | OHX | Putnam | 5 hr |
| Feb 6, 10:55 PM CST | Flash Flood Warning | OHX | DeKalb, Jackson, Putnam, Smith, Wilson | 3 hr |
| Feb 6, 11:27 PM CST | Flash Flood Warning | OHX | Cheatham, Davidson, Dickson, Rutherford, Sumner, Trousdale and 2 more | 9 hr |
| Feb 20, 7:37 AM CST | Flash Flood Warning | OHX | Cheatham, Davidson, Hickman, Sumner, Williamson, Wilson | 6 hr |
| Feb 20, 8:58 AM CST | Flash Flood Warning | OHX | Cannon, Davidson, Marshall, Maury, Rutherford, Williamson and 1 more | 5 hr |
| Feb 20, 9:18 AM CST | Flash Flood Warning | OHX | Bedford, Coffee, Giles, Lawrence, Marshall, Rutherford | 4 hr |
| Feb 20, 10:46 AM CST | Flash Flood Warning | OHX | Cannon, DeKalb, Putnam, Warren, White | 3 hr |
| Feb 20, 12:43 PM CST | Flash Flood Warning | OHX | Clay, Cumberland, Fentress, Overton, Pickett, Putnam | 4 hr |
| Feb 22, 8:39 AM CST | Flash Flood Warning | MEG | Hardin, McNairy | 3 hr |
| Feb 22, 9:52 AM CST | Flash Flood Warning | OHX | Giles, Lawrence, Lewis, Marshall, Maury, Wayne | 5 hr |
| Feb 22, 11:43 AM CST | Flash Flood Warning | MEG | Hardeman, Hardin, McNairy | 6 hr |
| Feb 23, 12:59 AM CST | Flash Flood Warning | OHX | Giles, Lawrence, Wayne | 6 hr |
| Feb 23, 3:07 AM CST | Flash Flood Warning | HUN | Franklin, Lincoln, Moore | 12 hr |
| Feb 23, 4:07 AM CST | Flash Flood Warning | MEG | Hardin, McNairy | 3 hr |
| Feb 23, 4:58 AM CST | Flash Flood Warning | OHX | Perry | 2 hr |
| Feb 23, 6:54 AM CST | Flash Flood Warning | OHX | Giles, Hickman, Lawrence, Lewis, Marshall, Maury and 2 more | 3 hr |
| Feb 23, 8:22 AM CST | Flash Flood Warning | OHX | Coffee, Grundy, Van Buren, Warren | 3 hr |
| Feb 23, 9:39 AM CST | Flash Flood Warning | MRX | Knox | 6 hr |
| Feb 23, 9:50 AM CST | Flash Flood Warning | OHX | Bedford, Cannon, Coffee, DeKalb, Putnam, Rutherford and 3 more | 3 hr |
| Feb 23, 9:55 AM CST | Flash Flood Warning | OHX | Cannon, Davidson, DeKalb, Rutherford, Smith, Sumner and 3 more | 3 hr |
| Feb 23, 9:58 AM CST | Flash Flood Warning | OHX | Giles, Hickman, Lawrence, Lewis, Marshall, Maury and 2 more | 91 min |
| Feb 23, 10:12 AM CST | Flash Flood Warning | OHX | Cumberland, Fentress, Jackson, Overton, Putnam, White | 3 hr |
| Feb 23, 10:26 AM CST | Flash Flood Warning | OHX | Cheatham, Davidson, Dickson, Houston, Humphreys, Robertson | 2 hr |
| Feb 23, 10:44 AM CST | Flash Flood Warning | MRX | Loudon, Roane | 5 hr |
| Feb 23, 11:36 AM CST | Flash Flood Warning | MRX | Bledsoe, Rhea | 3 hr |
| Feb 23, 2:16 PM CST | Flash Flood Warning | MEG | Carroll, Crockett, Dyer, Fayette, Gibson, Haywood and 6 more | 3 hr |
| Feb 23, 2:34 PM CST | Flash Flood Warning | MEG | Benton, Carroll, Chester, Hardeman, Henderson, Henry and 1 more | 3 hr |
| Feb 23, 2:56 PM CST | Flash Flood Warning | OHX | Cheatham, Dickson, Houston, Humphreys, Montgomery, Robertson and 1 more | 4 hr |
| Feb 23, 4:39 PM CST | Flash Flood Warning | OHX | Cheatham, Davidson, Robertson, Sumner, Wilson | 3 hr |
| Feb 23, 4:59 PM CST | Flash Flood Warning | OHX | Dickson, Hickman, Humphreys, Lewis, Maury, Perry | 4 hr |
| Feb 23, 5:14 PM CST | Flash Flood Warning | MEG | Crockett, Fayette, Haywood, Tipton | 3 hr |
| Feb 23, 5:27 PM CST | Flash Flood Warning | MEG | Chester, Hardeman, Madison | 3 hr |
| Feb 23, 5:48 PM CST | Flash Flood Warning | OHX | Cheatham, Davidson, Dickson, Rutherford, Trousdale, Williamson and 1 more | 4 hr |
| Feb 23, 5:54 PM CST | Flash Flood Warning | OHX | Clay, Jackson, Macon, Overton, Smith, Trousdale and 1 more | 4 hr |
| Feb 23, 6:25 PM CST | Flash Flood Warning | OHX | Bedford, Giles, Lawrence, Marshall, Maury, Rutherford and 1 more | 4 hr |
| Feb 23, 6:36 PM CST | Flash Flood Warning | OHX | Cheatham, Dickson, Houston, Humphreys, Montgomery, Robertson | 6 hr |
| Feb 23, 7:20 PM CST | Flash Flood Warning | OHX | Cheatham, Davidson, Robertson, Sumner | 4 hr |
| Feb 23, 7:30 PM CST | Flash Flood Warning | HUN | Franklin | 60 min |
| Feb 23, 10:33 PM CST | Flash Flood Warning | OHX | Bedford, Cannon, Coffee, Grundy, Van Buren, Warren | 4 hr |
| Mar 9, 9:12 PM CST | Flash Flood Warning | OHX | Coffee, Grundy, Warren | 3 hr |
| Apr 19, 11:00 AM CDT | Flash Flood Warning | MRX | Sevier | 3 hr |
| Jun 7, 3:19 AM CDT | Flash Flood Warning | MEG | Shelby | 3 hr |
| Jun 7, 8:45 AM CDT | Flash Flood Warning | OHX | Davidson, Sumner, Wilson | 3 hr |
| Jun 7, 9:22 AM CDT | Flash Flood Warning | OHX | Davidson | 3 hr |
| Jun 7, 6:21 PM CDT | Flash Flood Warning | MRX | Campbell | 3 hr |
| Jun 7, 7:31 PM CDT | Flash Flood Warning | MRX | Campbell | 3 hr |
| Jun 7, 9:09 PM CDT | Flash Flood Warning | MRX | Campbell | 6 hr |
| Jun 8, 8:11 PM CDT | Flash Flood Warning | HUN | Moore | 4 hr |
| Jun 9, 5:42 PM CDT | Flash Flood Warning | MRX | McMinn | 83 min |
| Jun 9, 5:52 PM CDT | Flash Flood Warning | OHX | Davidson, Sumner, Wilson | 3 hr |
| Jun 9, 8:56 PM CDT | Flash Flood Warning | OHX | Smith | 94 min |
| Jun 22, 5:19 PM CDT | Flash Flood Warning | OHX | Giles, Lawrence, Lewis, Perry, Wayne | 3 hr |
| Jun 26, 9:55 PM CDT | Flash Flood Warning | OHX | Sumner | 2 hr |
| Jun 26, 10:47 PM CDT | Flash Flood Warning | OHX | Robertson, Sumner | 3 hr |
| Jun 26, 11:16 PM CDT | Flash Flood Warning | OHX | Sumner, Wilson | 3 hr |
| Jun 27, 4:56 PM CDT | Flash Flood Warning | OHX | Jackson, Putnam | 82 min |
| Jun 27, 5:15 PM CDT | Flash Flood Warning | OHX | Bedford, Marshall, Maury, Rutherford, Williamson | 62 min |
| Jul 10, 4:41 PM CDT | Flash Flood Warning | MEG | Hardeman, Haywood, Madison | 3 hr |
| Jul 11, 9:56 AM CDT | Flash Flood Warning | MRX | Claiborne, Grainger, Hancock, Hawkins | 3 hr |
| Jul 13, 4:59 PM CDT | Flash Flood Warning | MRX | McMinn, Monroe | 3 hr |
| Jul 13, 5:57 PM CDT | Flash Flood Warning | MRX | McMinn, Meigs | 3 hr |
| Jul 13, 8:21 PM CDT | Flash Flood Warning | OHX | Jackson, Overton, Putnam | 4 hr |
| Jul 13, 8:56 PM CDT | Flash Flood Warning | OHX | Cheatham, Dickson, Montgomery, Robertson | 3 hr |
| Jul 13, 8:58 PM CDT | Flash Flood Warning | OHX | Clay, Jackson, Macon, Overton, Smith, Trousdale | 3 hr |
| Jul 13, 9:09 PM CDT | Flash Flood Warning | OHX | DeKalb, Putnam, Smith, White | 3 hr |
| Jul 14, 7:17 PM CDT | Flash Flood Warning | OHX | Lawrence, Wayne | 3 hr |
| Jul 16, 11:44 AM CDT | Flash Flood Warning | MEG | Shelby | 3 hr |
| Jul 16, 12:21 PM CDT | Flash Flood Warning | MEG | Fayette, Shelby | 3 hr |
| Jul 17, 10:14 PM CDT | Flash Flood Warning | MEG | Decatur | 3 hr |
| Jul 17, 10:41 PM CDT | Flash Flood Warning | OHX | Perry | 3 hr |
| Jul 20, 6:45 PM CDT | Flash Flood Warning | OHX | Bedford, Marshall, Rutherford | 2 hr |
| Jul 22, 3:26 PM CDT | Flash Flood Warning | OHX | Davidson, Rutherford, Smith, Trousdale, Williamson, Wilson | 3 hr |
| Jul 22, 3:57 PM CDT | Flash Flood Warning | OHX | Davidson, Rutherford, Williamson, Wilson | 3 hr |
| Jul 22, 4:25 PM CDT | Flash Flood Warning | MRX | Hawkins, Sullivan | 3 hr |
| Jul 22, 4:37 PM CDT | Flash Flood Warning | MRX | Grainger, Jefferson, Knox | 3 hr |
| Jul 22, 5:00 PM CDT | Flash Flood Warning | MRX | Blount, Jefferson, Knox, Sevier | 3 hr |
| Jul 22, 5:05 PM CDT | Flash Flood Warning | MRX | Loudon, Roane | 3 hr |
| Jul 30, 5:08 PM CDT | Flash Flood Warning | MRX | Johnson, Sullivan | 3 hr |
| Aug 1, 4:47 PM CDT | Flash Flood Warning | MRX | Knox | 68 min |
| Aug 1, 6:29 PM CDT | Flash Flood Warning | MRX | McMinn | 64 min |
| Aug 2, 5:29 PM CDT | Flash Flood Warning | MRX | Scott | 2 hr |
| Aug 4, 2:18 PM CDT | Flash Flood Warning | MEG | Shelby | 87 min |
| Aug 4, 3:13 PM CDT | Flash Flood Warning | OHX | Davidson | 3 hr |
| Aug 7, 4:12 PM CDT | Flash Flood Warning | HUN | Franklin, Lincoln, Moore | 3 hr |
| Aug 13, 4:39 PM CDT | Flash Flood Warning | OHX | Davidson, Sumner, Wilson | 3 hr |
| Aug 13, 5:45 PM CDT | Flash Flood Warning | OHX | Davidson, Rutherford, Williamson | 2 hr |
| Aug 13, 7:53 PM CDT | Flash Flood Warning | OHX | Lawrence, Lewis, Maury | 2 hr |
| Aug 13, 8:31 PM CDT | Flash Flood Warning | OHX | Giles, Lawrence, Wayne | 2 hr |
| Aug 20, 9:32 PM CDT | Flash Flood Warning | MEG | Shelby | 76 min |
| Aug 23, 9:37 PM CDT | Flash Flood Warning | MRX | Greene, Hawkins, Washington | 113 min |
| Aug 25, 6:55 PM CDT | Flash Flood Warning | MEG | Benton, Carroll, Gibson, Henderson, Madison | 3 hr |
| Dec 16, 3:14 AM CST | Flash Flood Warning | OHX | Sumner | 2 hr |
| Dec 16, 11:34 AM CST | Flash Flood Warning | MEG | Benton | 3 hr |
| Dec 16, 3:44 PM CST | Flash Flood Warning | OHX | Macon, Robertson, Sumner | 3 hr |
| Dec 29, 6:27 PM CST | Flash Flood Warning | OHX | Giles, Lawrence | 3 hr |
| Dec 29, 7:04 PM CST | Flash Flood Warning | OHX | Macon, Rutherford, Smith, Sumner, Trousdale, Wilson | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Davidson County19
- Wilson County18
- Sumner County15
- Rutherford County14
- Cheatham County11
- Williamson County11
- Lawrence County11
- Dickson County10
- Putnam County9
- Giles County9
- Smith County8
- Marshall County8
- Maury County8
- Robertson County8
- Trousdale County7
- Wayne County7
- Hickman County6
- Humphreys County6
- Jackson County6
- Bedford County6
- Lewis County6
- Perry County6
- Shelby County6
- Madison County5
- Knox County5
- DeKalb County5
- Cannon County5
- Coffee County5
- Warren County5
- Overton County5
- Carroll County4
- Haywood County4
- Campbell County4
- Grainger County4
- Hawkins County4
- White County4
- Hardeman County4
- Macon County4
- McMinn County4
- Crockett County3
45 more counties
- Gibson County3
- Jefferson County3
- Clay County3
- Hardin County3
- McNairy County3
- Franklin County3
- Moore County3
- Grundy County3
- Van Buren County3
- Houston County3
- Fayette County3
- Benton County3
- Montgomery County3
- Claiborne County2
- Cumberland County2
- Fentress County2
- Lincoln County2
- Loudon County2
- Roane County2
- Henry County2
- Tipton County2
- Chester County2
- Henderson County2
- Sevier County2
- Sullivan County2
- Anderson County1
- Union County1
- Hamblen County1
- Pickett County1
- Bledsoe County1
- Rhea County1
- Dyer County1
- Lauderdale County1
- Obion County1
- Weakley County1
- Stewart County1
- Hancock County1
- Monroe County1
- Meigs County1
- Decatur County1
- Blount County1
- Johnson County1
- Scott County1
- Greene County1
- Washington County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20182020
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.