Alert archive / Tennessee / Montgomery County
Weather alerts in Montgomery County, Tennessee, 2020
116 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Montgomery County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 116
- Warnings
- 25
- Watches
- 14
- Advisories
- 33
- Busiest month
- July24 alerts
- Busiest day
- July 12, 20209 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Montgomery County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 20 | 17 | 15% | 10 | 90% | 16 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Nashville, TN: tornado warnings | 28 | 5 | 82% | 22 | 23% | 8 min |
| NWS Nashville, TN: severe thunderstorm warnings | 172 | 115 | 33% | 362 | 82% | 18 min |
| NWS Nashville, TN: flash flood warnings | 35 | 21 | 40% | 65 | 78% | 77 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 1, 2:18 AM CST | Flood Watch | OHX | 58 hr |
| Jan 10, 3:34 AM CST | Wind Advisory | OHX | 36 hr |
| Jan 11, 6:12 AM CST | Mesoscale Discussion | SPC | 93 min |
| Jan 11, 6:54 AM CST | Severe Thunderstorm Warning | OHX | 51 min |
| Jan 11, 6:57 AM CST | Tornado Watch | SPC | 7 hr |
| Jan 11, 7:40 AM CST | Severe Thunderstorm Warning | OHX | 50 min |
| Jan 11, 4:43 PM CST | River Flood Advisory | OHX | 27 hr |
| Jan 15, 3:11 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 6, 2:25 PM CST | Winter Weather Advisory | OHX | 22 hr |
| Feb 11, 4:43 AM CST | River Flood Advisory | OHX | 5 days |
| Feb 11, 11:34 AM CST | Flash Flood Watch | OHX | 42 hr |
| Mar 2, 7:55 AM CST | Special Weather Statement | OHX | 35 min |
| Mar 2, 11:10 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 2, 11:22 PM CST | Tornado Watch | SPC | 7 hr |
| Mar 2, 11:43 PM CST | Severe Thunderstorm Warning | OHX | 47 min |
| Mar 3, 2:36 AM CST | Areal Flood Advisory | OHX | 3 hr |
| Mar 3, 5:44 PM CST | River Flood Advisory | OHX | 17 hr |
| Mar 12, 11:13 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 12, 11:44 AM CDT | Tornado Watch | SPC | 6 hr |
| Mar 12, 1:58 PM CDT | Special Weather Statement | OHX | 32 min |
| Mar 20, 2:22 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Mar 24, 11:27 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 28, 6:34 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 28, 7:06 PM CDT | Severe Thunderstorm Warning | OHX | 39 min |
| Mar 28, 9:43 PM CDT | Severe Thunderstorm Warning | OHX | 47 min |
| Mar 28, 9:58 PM CDT | Severe Thunderstorm Warning | OHX | 47 min |
| Mar 28, 10:37 PM CDT | Severe Thunderstorm Warning | OHX | 53 min |
| Apr 8, 7:04 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 8, 8:13 PM CDT | Severe Thunderstorm Warning | OHX | 47 min |
| Apr 8, 8:57 PM CDT | Severe Thunderstorm Warning | OHX | 33 min |
| Apr 8, 9:17 PM CDT | Severe Thunderstorm Warning | OHX | 28 min |
| Apr 10, 10:32 AM CDT | Frost Advisory | OHX | 21 hr |
| Apr 11, 9:03 PM CDT | Flash Flood Watch | OHX | 34 hr |
| Apr 11, 9:10 PM CDT | Wind Advisory | OHX | 37 hr |
| Apr 12, 11:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Apr 13, 8:28 AM CDT | River Flood Advisory | OHX | 40 hr |
| Apr 13, 5:17 PM CDT | Freeze Watch | OHX | 20 hr |
| Apr 14, 1:32 PM CDT | Freeze Warning | OHX | 19 hr |
| Apr 15, 3:38 AM CDT | Freezing Fog Advisory | OHX | 5 hr |
| Apr 15, 2:21 PM CDT | Frost Advisory | OHX | 18 hr |
| Apr 25, 2:06 PM CDT | Special Weather Statement | OHX | 24 min |
| Apr 25, 2:26 PM CDT | Special Weather Statement | OHX | 34 min |
| Apr 27, 3:09 AM CDT | Dense Fog Advisory | OHX | 6 hr |
| Apr 29, 11:21 AM CDT | Special Weather Statement | OHX | 39 min |
| May 3, 11:44 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 3, 12:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 3, 3:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 3, 3:13 PM CDT | Severe Thunderstorm Warning | OHX | 47 min |
| May 3, 3:44 PM CDT | Severe Thunderstorm Warning | OHX | 46 min |
| May 3, 4:11 PM CDT | Severe Thunderstorm Warning | OHX | 34 min |
| May 3, 6:18 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 4, 9:35 PM CDT | High Wind Warning | OHX | 113 min |
| May 8, 3:06 AM CDT | Freeze Warning | OHX | 29 hr |
| May 20, 3:50 AM CDT | Dense Fog Advisory | OHX | 4 hr |
| Jun 22, 2:44 PM CDT | Special Weather Statement | OHX | 31 min |
| Jun 22, 3:11 PM CDT | Severe Thunderstorm Warning | OHX | 19 min |
| Jul 1, 5:05 PM CDT | Special Weather Statement | OHX | 25 min |
| Jul 5, 4:46 PM CDT | Special Weather Statement | OHX | 14 min |
| Jul 6, 5:38 AM CDT | Special Weather Statement | OHX | 37 min |
| Jul 6, 7:04 AM CDT | Areal Flood Advisory | OHX | 56 min |
| Jul 8, 12:19 PM CDT | Special Weather Statement | PAH | 26 min |
| Jul 8, 12:27 PM CDT | Special Weather Statement | OHX | 48 min |
| Jul 12, 2:46 AM CDT | Special Weather Statement | OHX | 44 min |
| Jul 12, 2:59 AM CDT | Severe Thunderstorm Warning | OHX | 31 min |
| Jul 12, 3:11 AM CDT | Special Weather Statement | OHX | 49 min |
| Jul 12, 3:20 AM CDT | Special Weather Statement | OHX | 25 min |
| Jul 12, 3:25 AM CDT | Severe Thunderstorm Warning | OHX | 35 min |
| Jul 12, 3:46 AM CDT | Special Weather Statement | OHX | 44 min |
| Jul 12, 4:18 AM CDT | Severe Thunderstorm Warning | OHX | 27 min |
| Jul 12, 4:24 AM CDT | Areal Flood Advisory | OHX | 3 hr |
| Jul 12, 5:03 PM CDT | Special Weather Statement | OHX | 42 min |
| Jul 16, 2:21 PM CDT | Areal Flood Advisory | OHX | 114 min |
| Jul 19, 2:23 AM CDT | Heat Advisory | OHX | 16 hr |
| Jul 20, 12:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 5:37 PM CDT | Special Weather Statement | OHX | 23 min |
| Jul 20, 6:02 PM CDT | Special Weather Statement | OHX | 28 min |
| Jul 21, 3:46 PM CDT | Special Weather Statement | OHX | 44 min |
| Jul 21, 4:22 PM CDT | Special Weather Statement | OHX | 53 min |
| Jul 23, 8:23 AM CDT | Areal Flood Advisory | OHX | 112 min |
| Jul 24, 4:24 PM CDT | Areal Flood Advisory | OHX | 2 hr |
| Aug 3, 3:10 PM CDT | Special Weather Statement | OHX | 35 min |
| Aug 9, 4:21 PM CDT | Special Weather Statement | OHX | 39 min |
| Aug 10, 10:08 PM CDT | Special Weather Statement | OHX | 52 min |
| Aug 10, 10:57 PM CDT | Special Weather Statement | OHX | 48 min |
| Aug 10, 11:41 PM CDT | Special Weather Statement | OHX | 64 min |
| Aug 12, 1:50 PM CDT | Severe Thunderstorm Warning | OHX | 25 min |
| Aug 15, 3:49 AM CDT | Dense Fog Advisory | OHX | 5 hr |
| Aug 23, 2:17 AM CDT | Dense Fog Advisory | OHX | 6 hr |
| Aug 27, 6:05 PM CDT | Special Weather Statement | OHX | 40 min |
| Aug 28, 2:14 AM CDT | Flash Flood Watch | OHX | 20 hr |
| Aug 28, 10:31 AM CDT | Tornado Watch | SPC | 5 hr |
| Aug 28, 11:37 AM CDT | Severe Thunderstorm Warning | OHX | 23 min |
| Aug 29, 3:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Aug 29, 4:57 PM CDT | Special Weather Statement | OHX | 48 min |
| Aug 30, 3:15 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 31, 4:46 PM CDT | Special Weather Statement | OHX | 44 min |
| Sep 2, 7:01 PM CDT | Special Weather Statement | OHX | 29 min |
| Sep 28, 11:52 PM CDT | Dense Fog Advisory | OHX | 9 hr |
| Oct 12, 3:41 AM CDT | Dense Fog Advisory | OHX | 4 hr |
| Oct 16, 9:50 AM CDT | Frost Advisory | OHX | 22 hr |
| Oct 23, 1:30 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 23, 3:11 PM CDT | Special Weather Statement | OHX | 49 min |
| Oct 23, 4:47 PM CDT | Severe Thunderstorm Warning | OHX | 28 min |
| Oct 28, 10:15 AM CDT | Flash Flood Watch | OHX | 19 hr |
| Oct 28, 7:55 PM CDT | Areal Flood Advisory | OHX | 106 min |
| Oct 30, 2:21 PM CDT | Freeze Watch | OHX | 36 hr |
| Nov 1, 1:18 AM CST | Freeze Warning | OHX | 31 hr |
| Nov 14, 2:39 PM CST | Wind Advisory | OHX | 27 hr |
| Nov 19, 6:33 AM CST | Red Flag Warning | OHX | 11 hr |
| Nov 24, 8:23 PM CST | Wind Advisory | OHX | 19 hr |
| Nov 27, 1:37 AM CST | Dense Fog Advisory | OHX | 8 hr |
| Dec 6, 1:40 AM CST | Freezing Fog Advisory | OHX | 7 hr |
| Dec 13, 8:55 PM CST | Areal Flood Advisory | OHX | 3 hr |
| Dec 13, 9:24 PM CST | Areal Flood Advisory | OHX | 3 hr |
| Dec 13, 11:46 PM CST | Areal Flood Advisory | OHX | 3 hr |
| Dec 23, 1:46 PM CST | Wind Advisory | OHX | 10 hr |
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 | 20 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 14 |
| Special Weather Statement | 30 |
| Flooding | |
| Flash Flood Watch | 4 |
| Flood Watch | 1 |
| Areal Flood Advisory | 10 |
| River Flood Advisory | 4 |
| Winter | |
| Winter Weather Advisory | 1 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
| Freezing Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.