Alert archive / Tennessee / Decatur County
Weather alerts in Decatur County, Tennessee, 2019
144 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Decatur County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 144
- Warnings
- 23
- Watches
- 17
- Advisories
- 68
- Busiest month
- June23 alerts
- Busiest day
- July 18, 20196 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Decatur County in 2019 had a tornado report inside them.
Decatur County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 9 | 5 | 44% | 5 | 100% | 23 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Memphis, TN: tornado warnings | 43 | 9 | 79% | 33 | 42% | 14 min |
| NWS Memphis, TN: severe thunderstorm warnings | 161 | 76 | 53% | 247 | 71% | 23 min |
| NWS Memphis, TN: flash flood warnings | 47 | 16 | 66% | 50 | 58% | 69 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 | Lasted |
|---|---|---|---|
| Jan 5, 2:33 PM CST | Dense Fog Advisory | MEG | 16 hr |
| Jan 7, 11:38 AM CST | River Flood Advisory | MEG | 25 hr |
| Jan 7, 11:38 AM CST | River Flood Advisory | MEG | 25 hr |
| Jan 8, 6:50 PM CST | River Flood Advisory | OHX | 4 days |
| Jan 9, 12:27 PM CST | River Flood Advisory | MEG | 56 hr |
| Jan 11, 6:50 AM CST | River Flood Advisory | MEG | 4 days |
| Jan 15, 12:33 PM CST | River Flood Advisory | MEG | 5 days |
| Jan 18, 1:51 PM CST | Wind Advisory | MEG | 37 hr |
| Jan 20, 3:20 AM CST | Wind Advisory | MEG | 6 hr |
| Jan 20, 2:16 PM CST | River Flood Warning | MEG | 12 days |
| Jan 21, 8:44 AM CST | River Flood Advisory | OHX | 11 days |
| Jan 21, 1:58 PM CST | River Flood Advisory | MEG | 46 hr |
| Jan 23, 12:24 PM CST | River Flood Warning | MEG | 72 hr |
| Jan 26, 12:21 PM CST | River Flood Advisory | MEG | 6 days |
| Jan 27, 2:48 PM CST | Winter Weather Advisory | MEG | 37 hr |
| Feb 1, 6:36 AM CST | River Flood Advisory | MEG | 29 hr |
| Feb 5, 5:08 AM CST | Dense Fog Advisory | MEG | 25 hr |
| Feb 6, 3:02 PM CST | Mesoscale Discussion | SPC | 118 min |
| Feb 7, 3:23 PM CST | River Flood Advisory | MEG | 29 hr |
| Feb 8, 8:03 PM CST | River Flood Warning | MEG | 17 hr |
| Feb 9, 1:13 PM CST | River Flood Advisory | MEG | 5 days |
| Feb 14, 1:36 PM CST | River Flood Warning | MEG | 35 days |
| Feb 15, 7:50 AM CST | River Flood Advisory | OHX | 5 days |
| Feb 15, 1:45 PM CST | River Flood Warning | MEG | 31 days |
| Feb 18, 2:48 PM CST | Flash Flood Watch | MEG | 37 hr |
| Feb 19, 11:33 PM CST | River Flood Warning | OHX | 26 days |
| Feb 20, 4:06 AM CST | Flash Flood Watch | MEG | 9 hr |
| Feb 20, 4:07 AM CST | Areal Flood Advisory | MEG | 113 min |
| Feb 20, 3:34 PM CST | Flash Flood Watch | MEG | 3 days |
| Feb 22, 5:47 PM CST | Areal Flood Warning | MEG | 12 hr |
| Feb 23, 5:36 AM CST | Areal Flood Warning | MEG | 15 hr |
| Feb 23, 12:26 PM CST | Tornado Watch | SPC | 8 hr |
| Feb 23, 3:09 PM CST | Special Weather Statement | MEG | 51 min |
| Feb 23, 6:16 PM CST | Severe Thunderstorm Warning | MEG | 23 min |
| Mar 7, 12:37 PM CST | River Flood Advisory | MEG | 5 hr |
| Mar 7, 12:37 PM CST | River Flood Advisory | MEG | 5 hr |
| Mar 9, 4:20 AM CST | Wind Advisory | MEG | 14 hr |
| Mar 9, 9:45 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Mar 9, 10:32 AM CST | Tornado Watch | SPC | 8 hr |
| Mar 9, 1:27 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 12, 3:10 PM CDT | Wind Advisory | MEG | 52 hr |
| Mar 14, 5:28 AM CDT | Tornado Watch | SPC | 7 hr |
| Mar 14, 7:14 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 14, 10:32 AM CDT | Mesoscale Discussion | SPC | 58 min |
| Mar 14, 11:47 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Mar 14, 12:11 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 18, 8:28 AM CDT | River Flood Advisory | OHX | 4 days |
| Mar 30, 3:21 AM CDT | Freeze Watch | MEG | 24 hr |
| Mar 30, 3:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Mar 31, 3:01 AM CDT | Freeze Warning | MEG | 30 hr |
| Apr 5, 4:54 AM CDT | Dense Fog Advisory | MEG | 4 hr |
| Apr 6, 4:29 AM CDT | Dense Fog Advisory | MEG | 4 hr |
| Apr 6, 11:07 PM CDT | Special Weather Statement | MEG | 53 min |
| Apr 8, 1:10 PM CDT | River Flood Advisory | MEG | 4 days |
| Apr 9, 5:00 AM CDT | Dense Fog Advisory | MEG | 5 hr |
| Apr 11, 3:48 AM CDT | Wind Advisory | MEG | 15 hr |
| Apr 14, 3:02 PM CDT | Frost Advisory | MEG | 17 hr |
| Apr 15, 2:00 PM CDT | River Flood Advisory | MEG | 8 days |
| Apr 17, 3:39 PM CDT | Flash Flood Watch | MEG | 28 hr |
| Apr 23, 7:31 PM CDT | River Flood Advisory | MEG | 4 days |
| May 1, 2:44 PM CDT | Special Weather Statement | MEG | 46 min |
| May 1, 3:33 PM CDT | Special Weather Statement | MEG | 27 min |
| May 10, 1:34 PM CDT | River Flood Advisory | MEG | 5 days |
| May 10, 1:34 PM CDT | River Flood Advisory | MEG | 70 hr |
| May 16, 6:03 AM CDT | Dense Fog Advisory | MEG | 2 hr |
| May 20, 5:33 AM CDT | Dense Fog Advisory | MEG | 3 hr |
| May 24, 4:14 PM CDT | Special Weather Statement | MEG | 31 min |
| Jun 7, 12:05 PM CDT | Flash Flood Watch | MEG | 15 hr |
| Jun 17, 4:32 PM CDT | Special Weather Statement | MEG | 28 min |
| Jun 17, 7:56 PM CDT | Areal Flood Advisory | MEG | 64 min |
| Jun 19, 12:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 19, 10:24 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 20, 12:37 AM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 20, 1:27 AM CDT | Severe Thunderstorm Warning | MEG | 33 min |
| Jun 21, 5:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 21, 5:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 21, 7:08 PM CDT | Special Weather Statement | MEG | 37 min |
| Jun 21, 7:30 PM CDT | Severe Thunderstorm Warning | MEG | 30 min |
| Jun 21, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 22, 1:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 22, 5:26 PM CDT | Severe Thunderstorm Warning | MEG | 49 min |
| Jun 23, 1:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 23, 4:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 23, 6:15 PM CDT | Special Weather Statement | MEG | 45 min |
| Jun 23, 6:59 PM CDT | Special Weather Statement | MEG | 46 min |
| Jun 25, 6:00 AM CDT | Dense Fog Advisory | MEG | 3 hr |
| Jun 26, 7:51 PM CDT | Special Weather Statement | MEG | 24 min |
| Jun 28, 4:13 AM CDT | Dense Fog Advisory | MEG | 5 hr |
| Jun 28, 2:54 PM CDT | Special Weather Statement | MEG | 36 min |
| Jun 29, 1:26 PM CDT | River Flood Advisory | MEG | 72 hr |
| Jul 9, 5:05 PM CDT | Heat Advisory | MEG | 26 hr |
| Jul 16, 1:34 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 3:09 PM CDT | Heat Advisory | MEG | 53 hr |
| Jul 17, 7:39 PM CDT | Special Weather Statement | MEG | 51 min |
| Jul 17, 8:27 PM CDT | Special Weather Statement | MEG | 63 min |
| Jul 17, 10:04 PM CDT | Areal Flood Advisory | MEG | 3 hr |
| Jul 17, 10:14 PM CDT | Flash Flood Warning | MEG | 3 hr |
| Jul 17, 10:26 PM CDT | Special Weather Statement | MEG | 49 min |
| Jul 18, 5:34 PM CDT | Areal Flood Advisory | MEG | 116 min |
| Jul 22, 2:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 3:30 AM CDT | Dense Fog Advisory | MEG | 5 hr |
| Aug 5, 2:47 AM CDT | Dense Fog Advisory | MEG | 6 hr |
| Aug 6, 8:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 8, 2:06 AM CDT | Dense Fog Advisory | MEG | 7 hr |
| Aug 10, 3:54 AM CDT | Heat Advisory | MEG | 60 hr |
| Aug 10, 11:09 PM CDT | Dense Fog Advisory | MEG | 10 hr |
| Aug 11, 3:21 AM CDT | Excessive Heat Watch | MEG | 37 hr |
| Aug 11, 3:21 AM CDT | Excessive Heat Warning | MEG | 65 hr |
| Aug 13, 1:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 13, 5:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Aug 13, 6:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Aug 19, 3:59 AM CDT | Heat Advisory | MEG | 64 hr |
| Aug 20, 4:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 20, 7:00 PM CDT | Special Weather Statement | MEG | 30 min |
| Aug 23, 2:39 AM CDT | Dense Fog Advisory | MEG | 4 hr |
| Aug 28, 4:12 AM CDT | Dense Fog Advisory | MEG | 3 hr |
| Sep 26, 2:46 AM CDT | Dense Fog Advisory | MEG | 3 hr |
| Oct 6, 10:59 PM CDT | Severe Thunderstorm Warning | MEG | 46 min |
| Oct 6, 11:00 PM CDT | Tornado Warning | MEG | 24 min |
| Oct 7, 12:30 AM CDT | Areal Flood Advisory | MEG | 4 hr |
| Oct 9, 1:01 AM CDT | Dense Fog Advisory | MEG | 10 hr |
| Oct 12, 9:31 PM CDT | Frost Advisory | MEG | 10 hr |
| Oct 14, 5:47 AM CDT | Dense Fog Advisory | MEG | 4 hr |
| Oct 19, 11:55 PM CDT | Dense Fog Advisory | MEG | 9 hr |
| Oct 21, 3:06 AM CDT | Tornado Watch | SPC | 6 hr |
| Oct 21, 6:59 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Oct 25, 3:44 AM CDT | Flash Flood Watch | MEG | 34 hr |
| Oct 26, 6:03 AM CDT | Wind Advisory | MEG | 9 hr |
| Oct 26, 12:28 PM CDT | Severe Thunderstorm Warning | MEG | 47 min |
| Oct 26, 12:55 PM CDT | Severe Thunderstorm Warning | MEG | 50 min |
| Oct 26, 12:58 PM CDT | Severe Thunderstorm Warning | MEG | 47 min |
| Oct 26, 1:42 PM CDT | Severe Thunderstorm Warning | MEG | 48 min |
| Oct 30, 3:07 PM CDT | Freeze Watch | MEG | 12 hr |
| Oct 31, 3:19 AM CDT | Freeze Warning | MEG | 30 hr |
| Nov 11, 4:25 AM CST | Wind Advisory | MEG | 22 hr |
| Nov 11, 6:06 PM CST | Winter Weather Advisory | MEG | 9 hr |
| Nov 26, 12:11 PM CST | Wind Advisory | MEG | 18 hr |
| Nov 28, 8:02 PM CST | River Flood Advisory | MEG | 16 hr |
| Nov 30, 2:52 PM CST | Wind Advisory | MEG | 24 hr |
| Dec 2, 8:23 PM CST | River Flood Advisory | MEG | 8 days |
| Dec 7, 9:15 PM CST | Dense Fog Advisory | MEG | 12 hr |
| Dec 13, 8:13 PM CST | Dense Fog Advisory | MEG | 14 hr |
| Dec 23, 1:30 PM CST | River Flood Advisory | MEG | 7 days |
| Dec 30, 1:41 PM CST | River Flood Warning | MEG | 23 days |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 9 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 21 |
| Special Weather Statement | 15 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 1 |
| River Flood Warning | 7 |
| Flash Flood Watch | 6 |
| Areal Flood Advisory | 5 |
| River Flood Advisory | 25 |
| Winter | |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 2 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 9 |
| Fog and smoke | |
| Dense Fog Advisory | 21 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe 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.