Alert archive / Tennessee / Grundy County
Weather alerts in Grundy County, Tennessee, 2018
101 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Grundy County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 101
- Warnings
- 17
- Watches
- 13
- Advisories
- 33
- Busiest month
- June20 alerts
- Busiest day
- June 1, 20186 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 1 tornado warnings covering Grundy County in 2018 had a tornado report inside them.
Grundy County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 7 | 3 | 57% | 10 | 20% | 24 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Nashville, TN: tornado warnings | 32 | 10 | 69% | 20 | 70% | 15 min |
| NWS Nashville, TN: severe thunderstorm warnings | 183 | 100 | 45% | 394 | 61% | 15 min |
| NWS Nashville, TN: flash flood warnings | 32 | 18 | 44% | 61 | 72% | 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 3, 10:49 AM CST | Wind Chill Advisory | OHX | 22 hr |
| Jan 7, 3:31 AM CST | Winter Weather Advisory | OHX | 29 hr |
| Jan 8, 3:20 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 8, 7:12 PM CST | Dense Fog Advisory | OHX | 14 hr |
| Jan 10, 12:59 AM CST | Dense Fog Advisory | OHX | 8 hr |
| Jan 11, 3:41 AM CST | Winter Weather Advisory | OHX | 47 hr |
| Jan 12, 7:51 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 15, 3:54 AM CST | Winter Weather Advisory | OHX | 35 hr |
| Jan 16, 4:09 AM CST | Wind Chill Advisory | OHX | 32 hr |
| Jan 16, 4:09 AM CST | Winter Weather Advisory | OHX | 14 hr |
| Feb 9, 3:24 AM CST | Flood Watch | OHX | 60 hr |
| Feb 10, 2:01 PM CST | Areal Flood Advisory | OHX | 12 hr |
| Feb 11, 12:52 AM CST | Areal Flood Advisory | OHX | 6 hr |
| Feb 27, 3:16 AM CST | Flood Watch | OHX | 57 hr |
| Feb 28, 9:13 PM CST | Areal Flood Advisory | OHX | 12 hr |
| Mar 1, 7:03 AM CST | River Flood Advisory | OHX | 14 hr |
| Mar 1, 7:24 AM CST | Flash Flood Warning | OHX | 6 hr |
| Mar 17, 5:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Mar 19, 3:28 PM CDT | Tornado Watch | SPC | 9 hr |
| Mar 20, 2:04 AM CDT | Freeze Warning | OHX | 32 hr |
| Mar 21, 2:06 AM CDT | Freeze Warning | OHX | 31 hr |
| Apr 3, 7:14 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 3, 8:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 3, 10:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Apr 4, 2:47 AM CDT | Freeze Warning | OHX | 30 hr |
| Apr 6, 6:38 PM CDT | Freeze Watch | OHX | 8 hr |
| Apr 7, 2:59 AM CDT | Freeze Warning | OHX | 29 hr |
| Apr 10, 3:02 PM CDT | Frost Advisory | OHX | 17 hr |
| Apr 15, 3:46 PM CDT | Freeze Watch | OHX | 13 hr |
| Apr 15, 3:46 PM CDT | Freeze Warning | OHX | 16 hr |
| Apr 16, 4:39 AM CDT | Freeze Warning | OHX | 27 hr |
| Apr 19, 2:55 AM CDT | Frost Advisory | OHX | 29 hr |
| Apr 27, 6:23 AM CDT | Dense Fog Advisory | OHX | 3 hr |
| May 5, 1:12 PM CDT | Special Weather Statement | OHX | 48 min |
| May 6, 7:33 PM CDT | Special Weather Statement | OHX | 42 min |
| May 10, 1:06 PM CDT | Special Weather Statement | OHX | 24 min |
| May 15, 11:43 AM CDT | Special Weather Statement | OHX | 17 min |
| May 20, 2:10 PM CDT | Special Weather Statement | OHX | 50 min |
| May 20, 2:18 PM CDT | Severe Thunderstorm Warning | OHX | 27 min |
| May 28, 2:04 AM CDT | Flash Flood Watch | OHX | 52 hr |
| May 29, 1:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| May 31, 2:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| May 31, 7:36 PM CDT | Special Weather Statement | OHX | 39 min |
| May 31, 7:46 PM CDT | Severe Thunderstorm Warning | OHX | 44 min |
| May 31, 8:22 PM CDT | Special Weather Statement | OHX | 38 min |
| May 31, 9:20 PM CDT | Special Weather Statement | OHX | 40 min |
| May 31, 9:52 PM CDT | Areal Flood Advisory | OHX | 113 min |
| Jun 1, 5:53 AM CDT | Special Weather Statement | OHX | 22 min |
| Jun 14, 5:12 AM CDT | Dense Fog Advisory | OHX | 4 hr |
| Jun 16, 3:23 PM CDT | Special Weather Statement | OHX | 37 min |
| Jun 22, 12:35 PM CDT | Mesoscale Discussion | SPC | 85 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, 12:27 PM CDT | Special Weather Statement | OHX | 48 min |
| Jun 26, 5:17 PM CDT | Special Weather Statement | OHX | 58 min |
| Jun 27, 3:21 AM CDT | Special Weather Statement | OHX | 24 min |
| Jun 27, 1:29 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 6:38 PM CDT | Severe Thunderstorm Warning | OHX | 18 min |
| Jun 27, 6:58 PM CDT | Special Weather Statement | OHX | 32 min |
| Jun 27, 7:55 PM CDT | Areal Flood Advisory | OHX | 3 hr |
| Jun 28, 10:22 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 28, 2:11 PM CDT | Special Weather Statement | OHX | 64 min |
| Jul 5, 5:04 PM CDT | Special Weather Statement | OHX | 41 min |
| Jul 5, 5:58 PM CDT | Severe Thunderstorm Warning | OHX | 32 min |
| Jul 5, 6:13 PM CDT | Areal Flood Advisory | OHX | 2 hr |
| Jul 5, 9:31 PM CDT | Special Weather Statement | OHX | 29 min |
| Jul 20, 5:54 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 20, 6:22 PM CDT | Tornado Watch | SPC | 8 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, 2:38 AM CDT | Severe Thunderstorm Warning | OHX | 52 min |
| Jul 21, 4:35 AM CDT | Mesoscale Discussion | SPC | 115 min |
| Aug 6, 5:34 PM CDT | Special Weather Statement | OHX | 41 min |
| Aug 6, 5:40 PM CDT | Severe Thunderstorm Warning | OHX | 24 min |
| Aug 7, 5:44 PM CDT | Special Weather Statement | OHX | 46 min |
| Aug 7, 6:02 PM CDT | Severe Thunderstorm Warning | OHX | 23 min |
| Aug 10, 4:26 AM CDT | Areal Flood Advisory | OHX | 2 hr |
| Aug 11, 2:53 AM CDT | Dense Fog Advisory | OHX | 6 hr |
| Aug 16, 9:01 PM CDT | Special Weather Statement | OHX | 44 min |
| Aug 17, 5:59 PM CDT | Areal Flood Advisory | OHX | 3 hr |
| Sep 13, 4:36 PM CDT | Areal Flood Advisory | OHX | 112 min |
| Sep 24, 3:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 26, 4:14 AM CDT | Flash Flood Watch | OHX | 10 hr |
| Sep 26, 10:39 AM CDT | Areal Flood Advisory | OHX | 3 hr |
| Oct 20, 1:27 PM CDT | Frost Advisory | OHX | 20 hr |
| Oct 21, 2:52 AM CDT | Freeze Warning | OHX | 29 hr |
| Nov 1, 10:31 AM CDT | Special Weather Statement | OHX | 59 min |
| Nov 5, 10:30 PM CST | Tornado Watch | SPC | 7 hr |
| Nov 6, 1:23 AM CST | Tornado Warning | OHX | 39 min |
| Nov 8, 9:50 AM CST | Freeze Warning | OHX | 49 hr |
| Nov 21, 5:08 AM CST | Freezing Fog Advisory | OHX | 4 hr |
| Nov 25, 12:19 AM CST | Dense Fog Advisory | OHX | 8 hr |
| Dec 1, 10:55 PM CST | Special Weather Statement | OHX | 35 min |
| Dec 10, 2:40 AM CST | Winter Weather Advisory | OHX | 5 hr |
| Dec 11, 4:34 AM CST | Freezing Fog Advisory | OHX | 4 hr |
| Dec 16, 11:43 PM CST | Dense Fog Advisory | OHX | 9 hr |
| Dec 23, 11:58 PM CST | Freezing Fog Advisory | OHX | 10 hr |
| Dec 26, 4:11 AM CST | Wind Advisory | OHX | 46 hr |
| Dec 27, 2:59 PM CST | Flash Flood Watch | OHX | 15 hr |
| Dec 31, 1:06 AM CST | Wind Advisory | OHX | 17 hr |
| Dec 31, 3:46 PM CST | Special Weather Statement | OHX | 29 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 | 7 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 23 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 3 |
| Flood Watch | 2 |
| Areal Flood Advisory | 10 |
| River Flood Advisory | 1 |
| Winter | |
| Winter Weather Advisory | 5 |
| Cold | |
| Freeze Warning | 8 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
| Freezing 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.