Alert archive / Tennessee / Decatur County
Weather alerts in Decatur County, Tennessee, 2016
97 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 97
- Warnings
- 20
- Watches
- 12
- Advisories
- 37
- Busiest month
- March14 alerts
- Busiest day
- March 31, 20166 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 2 tornado warnings covering Decatur County in 2016 had a tornado report inside them.
Decatur County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 4 | 2 | 50% | 0 | ||
| Flash flood warnings | 5 | 2 | 60% | 1 | 100% | 127 min |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Memphis, TN: tornado warnings | 30 | 7 | 77% | 11 | 64% | 15 min |
| NWS Memphis, TN: severe thunderstorm warnings | 225 | 76 | 66% | 179 | 64% | 23 min |
| NWS Memphis, TN: flash flood warnings | 157 | 36 | 77% | 80 | 74% | 94 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 8, 7:08 AM CST | River Flood Advisory | OHX | 6 days |
| Jan 13, 12:53 PM CST | River Flood Advisory | MEG | 4 days |
| Jan 13, 12:53 PM CST | River Flood Advisory | MEG | 4 days |
| Jan 19, 3:17 AM CST | Winter Weather Advisory | MEG | 31 hr |
| Jan 20, 1:15 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 20, 1:33 PM CST | Winter Storm Watch | MEG | 26 hr |
| Jan 21, 4:39 AM CST | Winter Storm Warning | MEG | 40 hr |
| Jan 23, 12:14 PM CST | River Flood Advisory | MEG | 16 days |
| Feb 1, 3:55 PM CST | Wind Advisory | MEG | 26 hr |
| Feb 2, 12:22 PM CST | Tornado Watch | SPC | 9 hr |
| Feb 2, 2:26 PM CST | Severe Thunderstorm Warning | MEG | 34 min |
| Feb 2, 6:13 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 5, 7:20 AM CST | River Flood Advisory | OHX | 7 days |
| Feb 5, 11:56 AM CST | River Flood Warning | MEG | 7 days |
| Feb 5, 8:24 PM CST | River Flood Advisory | MEG | 6 days |
| Feb 11, 9:32 PM CST | River Flood Advisory | MEG | 4 days |
| Feb 13, 3:35 PM CST | Winter Weather Advisory | MEG | 35 hr |
| Feb 14, 7:59 PM CST | River Flood Warning | MEG | 6 days |
| Feb 15, 12:16 PM CST | River Flood Advisory | MEG | 11 days |
| Feb 15, 7:09 PM CST | Dense Fog Advisory | MEG | 15 hr |
| Feb 26, 12:53 PM CST | River Flood Warning | MEG | 6 days |
| Mar 3, 8:02 PM CST | River Flood Advisory | MEG | 4 days |
| Mar 10, 1:55 PM CST | Flash Flood Warning | MEG | 3 hr |
| Mar 10, 4:52 PM CST | Areal Flood Warning | MEG | 6 hr |
| Mar 19, 3:01 PM CDT | Freeze Watch | MEG | 13 hr |
| Mar 20, 3:55 AM CDT | Freeze Warning | MEG | 29 hr |
| Mar 21, 4:25 AM CDT | Frost Advisory | MEG | 28 hr |
| Mar 25, 3:08 PM CDT | Frost Advisory | MEG | 18 hr |
| Mar 29, 3:20 PM CDT | Flash Flood Watch | MEG | 51 hr |
| Mar 31, 2:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Mar 31, 2:35 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 31, 3:25 PM CDT | Severe Thunderstorm Warning | MEG | 50 min |
| Mar 31, 3:38 PM CDT | Tornado Warning | MEG | 32 min |
| Mar 31, 3:39 PM CDT | Tornado Warning | MEG | 36 min |
| Mar 31, 4:38 PM CDT | Areal Flood Advisory | MEG | 2 hr |
| Apr 8, 3:02 AM CDT | Freeze Warning | MEG | 29 hr |
| Apr 27, 3:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 1:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| May 1, 1:36 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 1, 5:09 PM CDT | Flash Flood Warning | MEG | 3 hr |
| May 1, 5:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| May 12, 9:10 AM CDT | Mesoscale Discussion | SPC | 95 min |
| May 21, 1:21 AM CDT | Dense Fog Advisory | MEG | 8 hr |
| Jun 6, 5:48 AM CDT | Dense Fog Advisory | MEG | 116 min |
| Jun 15, 4:08 AM CDT | Heat Advisory | MEG | 60 hr |
| Jun 15, 12:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 15, 12:39 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 15, 3:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 15, 4:00 PM CDT | Special Weather Statement | MEG | 45 min |
| Jun 15, 4:15 PM CDT | Severe Thunderstorm Warning | MEG | 30 min |
| Jun 23, 3:27 AM CDT | Heat Advisory | MEG | 39 hr |
| Jun 25, 10:36 AM CDT | Heat Advisory | MEG | 32 hr |
| Jun 27, 1:05 PM CDT | Flash Flood Warning | MEG | 3 hr |
| Jun 27, 2:28 PM CDT | Flash Flood Warning | MEG | 3 hr |
| Jun 28, 3:30 AM CDT | Dense Fog Advisory | MEG | 5 hr |
| Jun 28, 6:38 PM CDT | Special Weather Statement | MEG | 52 min |
| Jul 6, 10:48 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 8, 1:40 PM CDT | Heat Advisory | MEG | 5 hr |
| Jul 8, 7:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jul 14, 9:42 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 7:16 AM CDT | Dense Fog Advisory | MEG | 104 min |
| Jul 18, 3:18 AM CDT | Heat Advisory | MEG | 6 days |
| Jul 22, 11:36 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 22, 3:11 PM CDT | Special Weather Statement | MEG | 49 min |
| Aug 1, 3:37 PM CDT | Heat Advisory | MEG | 5 days |
| Aug 1, 5:09 PM CDT | Special Weather Statement | MEG | 51 min |
| Aug 1, 5:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 4, 4:55 PM CDT | Special Weather Statement | MEG | 35 min |
| Aug 5, 8:07 PM CDT | Special Weather Statement | MEG | 23 min |
| Aug 5, 8:30 PM CDT | Areal Flood Advisory | MEG | 2 hr |
| Aug 5, 8:37 PM CDT | Special Weather Statement | MEG | 38 min |
| Aug 25, 2:11 PM CDT | Special Weather Statement | MEG | 49 min |
| Aug 25, 2:49 PM CDT | Special Weather Statement | MEG | 26 min |
| Aug 26, 1:25 PM CDT | Flash Flood Warning | MEG | 2 hr |
| Sep 10, 1:05 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 19, 2:30 AM CDT | Dense Fog Advisory | MEG | 7 hr |
| Oct 15, 2:49 AM CDT | Dense Fog Advisory | MEG | 6 hr |
| Oct 20, 12:28 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 21, 3:51 PM CDT | Frost Advisory | MEG | 17 hr |
| Nov 9, 3:12 PM CST | Frost Advisory | MEG | 17 hr |
| Nov 12, 3:19 AM CST | Freeze Watch | MEG | 11 hr |
| Nov 12, 2:08 PM CST | Freeze Warning | MEG | 19 hr |
| Nov 18, 3:22 PM CST | Freeze Watch | MEG | 12 hr |
| Nov 19, 3:18 AM CST | Freeze Warning | MEG | 29 hr |
| Nov 27, 12:46 AM CST | Dense Fog Advisory | MEG | 8 hr |
| Nov 27, 2:04 PM CST | Wind Advisory | MEG | 28 hr |
| Dec 17, 12:16 PM CST | Winter Weather Advisory | MEG | 18 hr |
| Dec 17, 1:42 PM CST | Tornado Watch | SPC | 7 hr |
| Dec 17, 5:45 PM CST | Mesoscale Discussion | SPC | 90 min |
| Dec 17, 8:28 PM CST | Mesoscale Discussion | SPC | 62 min |
| Dec 17, 8:58 PM CST | Tornado Watch | SPC | 6 hr |
| Dec 18, 2:30 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 20, 5:47 AM CST | Freezing Fog Advisory | MEG | 4 hr |
| Dec 20, 11:43 PM CST | Freezing Fog Advisory | MEG | 9 hr |
| Dec 24, 6:16 PM CST | Dense Fog Advisory | MEG | 17 hr |
| Dec 28, 3:51 PM CST | Mesoscale Discussion | SPC | 114 min |
| Dec 28, 3:56 PM CST | Severe Thunderstorm Warning | MEG | 34 min |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20152017
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.