Alert archive / Tennessee / Marion County
Weather alerts in Marion County, Tennessee, 2018
112 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Marion County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 112
- Warnings
- 31
- Watches
- 11
- Advisories
- 37
- Busiest month
- June25 alerts
- Busiest day
- September 26, 20188 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Marion County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 12 | 20% | 7 | 86% | 13 min |
| Flash flood warnings | 2 | 0 | 100% | 1 | 0% |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 8 | 0 | 100% | 0 | ||
| NWS Morristown, TN: severe thunderstorm warnings | 210 | 162 | 23% | 267 | 84% | 22 min |
| NWS Morristown, TN: flash flood warnings | 37 | 27 | 27% | 35 | 83% | 73 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, 3:14 AM CST | Wind Chill Advisory | MRX | 30 hr |
| Jan 3, 3:27 AM CST | Wind Chill Advisory | MRX | 32 hr |
| Jan 7, 3:06 AM CST | Winter Weather Advisory | MRX | 37 hr |
| Jan 8, 3:20 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 8, 10:10 AM CST | Winter Weather Advisory | MRX | 95 min |
| Jan 12, 2:58 AM CST | Winter Weather Advisory | MRX | 29 hr |
| Jan 15, 9:08 AM CST | Winter Weather Advisory | MRX | 45 hr |
| Jan 16, 9:45 AM CST | Wind Chill Advisory | MRX | 24 hr |
| Feb 9, 2:46 AM CST | Flood Watch | MRX | 63 hr |
| Feb 10, 5:53 PM CST | Areal Flood Advisory | MRX | 3 hr |
| Feb 10, 7:41 PM CST | River Flood Warning | MRX | 53 hr |
| Feb 10, 9:03 PM CST | Areal Flood Advisory | MRX | 10 hr |
| Feb 25, 2:01 AM CST | Special Weather Statement | MRX | 59 min |
| Feb 25, 2:55 AM CST | Special Weather Statement | MRX | 65 min |
| Feb 27, 3:03 AM CST | Flood Watch | MRX | 63 hr |
| Feb 28, 10:19 AM CST | River Flood Warning | MRX | 3 days |
| Feb 28, 10:33 AM CST | Areal Flood Advisory | MRX | 3 hr |
| Feb 28, 3:45 PM CST | Areal Flood Warning | MRX | 9 hr |
| Mar 3, 2:22 PM CST | Areal Flood Warning | MRX | 24 hr |
| Mar 17, 5:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Mar 19, 4:01 PM CDT | Special Weather Statement | MRX | 44 min |
| Mar 19, 7:47 PM CDT | Severe Thunderstorm Warning | MRX | 43 min |
| Mar 20, 3:13 AM CDT | Dense Fog Advisory | MRX | 6 hr |
| Mar 21, 2:40 AM CDT | Freeze Warning | MRX | 30 hr |
| Apr 3, 8:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 3, 8:50 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 3, 10:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Apr 3, 11:08 PM CDT | Severe Thunderstorm Warning | MRX | 67 min |
| Apr 4, 3:32 AM CDT | Freeze Warning | MRX | 28 hr |
| Apr 7, 2:28 AM CDT | Freeze Warning | MRX | 31 hr |
| Apr 16, 3:28 AM CDT | Freeze Watch | MRX | 11 hr |
| Apr 16, 3:28 AM CDT | Freeze Warning | MRX | 29 hr |
| Apr 16, 3:43 AM CDT | River Flood Warning | MRX | 27 hr |
| Apr 22, 8:40 AM CDT | Wind Advisory | MRX | 40 hr |
| Apr 23, 7:29 PM CDT | Areal Flood Advisory | MRX | 3 hr |
| Apr 23, 10:09 PM CDT | Areal Flood Advisory | MRX | 3 hr |
| May 10, 1:21 PM CDT | Special Weather Statement | MRX | 39 min |
| May 10, 2:41 PM CDT | Special Weather Statement | MRX | 19 min |
| May 10, 2:58 PM CDT | Special Weather Statement | MRX | 47 min |
| May 15, 1:52 PM CDT | Special Weather Statement | MRX | 23 min |
| May 15, 2:12 PM CDT | Special Weather Statement | MRX | 63 min |
| May 15, 3:02 PM CDT | Areal Flood Advisory | MRX | 3 hr |
| May 27, 11:12 PM CDT | Areal Flood Advisory | MRX | 3 hr |
| May 28, 3:20 AM CDT | Flash Flood Watch | MRX | 64 hr |
| May 29, 1:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| May 29, 7:21 PM CDT | Areal Flood Advisory | MRX | 114 min |
| May 31, 12:59 PM CDT | Areal Flood Advisory | MRX | 3 hr |
| May 31, 9:25 PM CDT | Severe Thunderstorm Warning | MRX | 29 min |
| Jun 3, 2:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 11, 3:41 AM CDT | Special Weather Statement | MRX | 34 min |
| Jun 11, 12:54 PM CDT | Special Weather Statement | MRX | 51 min |
| Jun 22, 12:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 22, 4:07 PM CDT | Areal Flood Advisory | MRX | 113 min |
| Jun 23, 10:32 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 23, 11:09 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 23, 12:18 PM CDT | Special Weather Statement | MRX | 42 min |
| Jun 23, 12:35 PM CDT | Severe Thunderstorm Warning | MRX | 40 min |
| Jun 23, 12:54 PM CDT | Severe Thunderstorm Warning | MRX | 51 min |
| Jun 24, 3:38 PM CDT | Special Weather Statement | MRX | 52 min |
| Jun 24, 3:59 PM CDT | Severe Thunderstorm Warning | MRX | 42 min |
| Jun 26, 6:17 PM CDT | Severe Thunderstorm Warning | MRX | 58 min |
| Jun 26, 7:34 PM CDT | Areal Flood Advisory | MRX | 116 min |
| Jun 27, 1:29 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 6:52 PM CDT | Special Weather Statement | MRX | 38 min |
| Jun 27, 6:57 PM CDT | Severe Thunderstorm Warning | MRX | 63 min |
| Jun 28, 9:15 AM CDT | Severe Thunderstorm Warning | MRX | 60 min |
| Jun 28, 10:14 AM CDT | Severe Thunderstorm Warning | MRX | 61 min |
| Jun 28, 10:22 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 28, 10:59 AM CDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 28, 11:09 AM CDT | Severe Thunderstorm Warning | MRX | 36 min |
| Jun 28, 11:57 AM CDT | Severe Thunderstorm Warning | MRX | 33 min |
| Jun 28, 12:39 PM CDT | Flash Flood Warning | MRX | 90 min |
| Jul 6, 1:40 PM CDT | Areal Flood Advisory | MRX | 2 hr |
| Jul 6, 2:37 PM CDT | Special Weather Statement | MRX | 38 min |
| Jul 17, 4:33 PM CDT | Areal Flood Advisory | MRX | 117 min |
| Jul 20, 5:54 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 20, 7:02 PM CDT | Tornado Watch | SPC | 7 hr |
| Jul 21, 1:38 AM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 21, 2:00 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 21, 2:41 AM CDT | Severe Thunderstorm Warning | MRX | 48 min |
| Jul 21, 3:33 AM CDT | Areal Flood Advisory | MRX | 117 min |
| Jul 21, 4:35 AM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 8, 1:36 PM CDT | Areal Flood Advisory | MRX | 114 min |
| Aug 9, 1:35 PM CDT | Special Weather Statement | MRX | 40 min |
| Aug 9, 2:24 PM CDT | Areal Flood Advisory | MRX | 2 hr |
| Aug 16, 3:30 PM CDT | Areal Flood Advisory | MRX | 60 min |
| Aug 17, 7:03 PM CDT | Severe Thunderstorm Warning | MRX | 72 min |
| Aug 17, 7:47 PM CDT | Areal Flood Advisory | MRX | 118 min |
| Aug 30, 5:43 PM CDT | Special Weather Statement | MRX | 32 min |
| Sep 13, 5:14 PM CDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 24, 9:36 PM CDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 25, 7:52 PM CDT | Special Weather Statement | MRX | 53 min |
| Sep 25, 9:15 PM CDT | Special Weather Statement | HUN | 15 min |
| Sep 26, 1:01 AM CDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 26, 3:23 AM CDT | Flash Flood Watch | MRX | 40 hr |
| Sep 26, 7:28 AM CDT | Areal Flood Advisory | MRX | 10 hr |
| Sep 26, 10:59 AM CDT | Flash Flood Warning | MRX | 6 hr |
| Sep 26, 3:31 PM CDT | River Flood Warning | MRX | 21 hr |
| Sep 26, 4:55 PM CDT | Areal Flood Warning | MRX | 18 hr |
| Oct 21, 2:35 AM CDT | Frost Advisory | MRX | 29 hr |
| Nov 5, 10:30 PM CST | Tornado Watch | SPC | 7 hr |
| Nov 6, 1:40 AM CST | Mesoscale Discussion | SPC | 65 min |
| Nov 6, 2:27 AM CST | Severe Thunderstorm Warning | MRX | 48 min |
| Nov 8, 10:04 AM CST | Freeze Warning | MRX | 47 hr |
| Nov 10, 11:35 AM CST | Freeze Warning | MRX | 21 hr |
| Dec 17, 3:45 AM CST | Dense Fog Advisory | MRX | 5 hr |
| Dec 26, 3:02 AM CST | Wind Advisory | MRX | 57 hr |
| Dec 26, 2:42 PM CST | Flash Flood Watch | MRX | 48 hr |
| Dec 28, 3:51 AM CST | Areal Flood Advisory | MRX | 5 hr |
| Dec 28, 9:01 AM CST | River Flood Warning | MRX | 46 hr |
| Dec 28, 8:57 PM CST | Dense Fog Advisory | MRX | 10 hr |
| Dec 31, 4:22 PM CST | Special Weather Statement | MRX | 53 min |
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 | 15 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 14 |
| Special Weather Statement | 19 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 2 |
| River Flood Warning | 5 |
| Flash Flood Watch | 3 |
| Flood Watch | 2 |
| Areal Flood Advisory | 24 |
| Winter | |
| Winter Weather Advisory | 4 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.