Alert archive / Tennessee / Grundy County
Weather alerts in Grundy County, Tennessee, 2012
113 weather alerts in 2012, 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 2012. Tap one for its archive.
- Alerts
- 113
- Warnings
- 22
- Watches
- 21
- Advisories
- 22
- Busiest month
- March25 alerts
- Busiest day
- March 2, 201214 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 6 tornado warnings covering Grundy County in 2012 had a tornado report inside them.
Grundy County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 6 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 12 | 5 | 58% | 2 | 100% | 26 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Nashville, TN: tornado warnings | 65 | 7 | 89% | 19 | 74% | 17 min |
| NWS Nashville, TN: severe thunderstorm warnings | 381 | 193 | 49% | 531 | 63% | 18 min |
| NWS Nashville, TN: flash flood warnings | 22 | 8 | 64% | 18 | 61% | 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, 1:55 PM CST | Wind Advisory | OHX | 28 hr |
| Jan 11, 11:00 AM CST | Special Weather Statement | OHX | 2 hr |
| Jan 12, 3:21 AM CST | Winter Weather Advisory | OHX | 30 hr |
| Jan 20, 10:35 PM CST | Tornado Watch | SPC | 8 hr |
| Jan 21, 4:20 AM CST | Mesoscale Discussion | SPC | 55 min |
| Jan 21, 3:50 PM CST | Wind Advisory | OHX | 36 hr |
| Jan 21, 5:02 PM CST | Dense Fog Advisory | OHX | 19 hr |
| Jan 22, 10:59 PM CST | Tornado Watch | SPC | 7 hr |
| Jan 23, 1:25 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 14, 5:23 PM CST | Dense Fog Advisory | OHX | 10 hr |
| Feb 21, 2:40 AM CST | Wind Advisory | OHX | 7 hr |
| Feb 22, 2:08 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 22, 5:49 PM CST | Mesoscale Discussion | SPC | 86 min |
| Feb 22, 6:08 PM CST | Severe Thunderstorm Warning | OHX | 26 min |
| Feb 23, 3:48 AM CST | Wind Advisory | OHX | 16 hr |
| Feb 24, 1:00 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 29, 11:31 AM CST | Tornado Watch | SPC | 8 hr |
| Feb 29, 5:14 PM CST | Severe Thunderstorm Warning | OHX | 16 min |
| Mar 2, 4:00 AM CST | Wind Advisory | OHX | 17 hr |
| Mar 2, 9:07 AM CST | Mesoscale Discussion | SPC | 53 min |
| Mar 2, 9:25 AM CST | Tornado Watch | SPC | 5 hr |
| Mar 2, 9:51 AM CST | Tornado Warning | OHX | 24 min |
| Mar 2, 10:12 AM CST | Tornado Warning | OHX | 33 min |
| Mar 2, 11:12 AM CST | Flash Flood Watch | OHX | 10 hr |
| Mar 2, 11:46 AM CST | Mesoscale Discussion | SPC | 29 min |
| Mar 2, 1:20 PM CST | Tornado Watch | SPC | 9 hr |
| Mar 2, 1:36 PM CST | Special Weather Statement | OHX | 54 min |
| Mar 2, 2:27 PM CST | Tornado Warning | OHX | 33 min |
| Mar 2, 3:22 PM CST | Tornado Warning | OHX | 23 min |
| Mar 2, 3:25 PM CST | Mesoscale Discussion | SPC | 65 min |
| Mar 2, 3:36 PM CST | Tornado Warning | OHX | 39 min |
| Mar 2, 3:42 PM CST | Tornado Warning | OHX | 32 min |
| Mar 2, 7:18 PM CST | Mesoscale Discussion | SPC | 57 min |
| Mar 7, 12:59 PM CST | Special Weather Statement | OHX | 5 hr |
| Mar 15, 2:06 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 15, 6:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Mar 16, 12:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 23, 10:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Mar 24, 4:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Mar 31, 12:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Mar 31, 12:47 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Mar 31, 3:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Mar 31, 5:00 PM CDT | Mesoscale Discussion | SPC | 30 min |
| Apr 5, 1:21 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 5, 3:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Apr 6, 1:33 PM CDT | Frost Advisory | OHX | 18 hr |
| Apr 9, 9:12 PM CDT | Freeze Watch | OHX | 17 hr |
| Apr 10, 3:56 AM CDT | Frost Advisory | OHX | 27 hr |
| Apr 10, 2:11 PM CDT | Freeze Watch | OHX | 22 hr |
| Apr 11, 3:49 AM CDT | Freeze Warning | OHX | 28 hr |
| Apr 26, 5:22 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 26, 2:11 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 26, 5:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 1, 12:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| May 6, 5:45 PM CDT | Severe Thunderstorm Warning | OHX | 30 min |
| May 20, 4:30 PM CDT | Special Weather Statement | OHX | 60 min |
| May 22, 6:15 PM CDT | Areal Flood Advisory | OHX | 35 min |
| May 30, 4:09 AM CDT | Dense Fog Advisory | OHX | 4 hr |
| Jun 11, 1:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 11, 7:44 PM CDT | Special Weather Statement | OHX | 61 min |
| Jul 1, 1:08 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 2, 5:16 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 5:42 PM CDT | Special Weather Statement | OHX | 63 min |
| Jul 5, 12:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 5, 2:19 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 5, 6:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 5, 6:51 PM CDT | Severe Thunderstorm Warning | OHX | 54 min |
| Jul 15, 6:12 PM CDT | Special Weather Statement | OHX | 48 min |
| Jul 15, 6:29 PM CDT | Areal Flood Advisory | OHX | 2 hr |
| Jul 18, 2:02 PM CDT | Special Weather Statement | OHX | 58 min |
| Jul 19, 6:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 28, 12:57 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 31, 4:25 AM CDT | Severe Thunderstorm Warning | OHX | 35 min |
| Jul 31, 4:59 AM CDT | Severe Thunderstorm Warning | OHX | 16 min |
| Aug 1, 1:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 1, 2:40 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 1, 6:08 PM CDT | Special Weather Statement | OHX | 52 min |
| Aug 1, 6:31 PM CDT | Severe Thunderstorm Warning | OHX | 44 min |
| Aug 1, 7:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Aug 1, 8:13 PM CDT | Special Weather Statement | OHX | 62 min |
| Aug 1, 8:26 PM CDT | Severe Thunderstorm Warning | OHX | 34 min |
| Aug 1, 8:46 PM CDT | Severe Thunderstorm Warning | OHX | 44 min |
| Aug 10, 11:20 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 13, 12:21 PM CDT | Mesoscale Discussion | SPC | 24 min |
| Aug 13, 12:38 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 16, 9:26 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 16, 11:24 PM CDT | Severe Thunderstorm Warning | OHX | 36 min |
| Aug 17, 12:05 AM CDT | Severe Thunderstorm Warning | OHX | 40 min |
| Sep 2, 2:49 PM CDT | Tornado Watch | SPC | 7 hr |
| Sep 2, 6:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Sep 17, 2:48 AM CDT | Flood Watch | OHX | 27 hr |
| Sep 17, 3:53 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Sep 18, 2:51 AM CDT | Areal Flood Warning | OHX | 4 hr |
| Oct 1, 1:16 PM CDT | Tornado Watch | SPC | 7 hr |
| Oct 1, 3:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 1, 5:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Oct 1, 7:06 PM CDT | Tornado Watch | SPC | 3 hr |
| Oct 8, 2:56 PM CDT | Frost Advisory | OHX | 17 hr |
| Oct 10, 3:55 AM CDT | Frost Advisory | OHX | 28 hr |
| Oct 14, 7:13 AM CDT | Wind Advisory | OHX | 15 hr |
| Oct 14, 7:50 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 14, 10:33 PM CDT | Special Weather Statement | OHX | 27 min |
| Oct 29, 3:48 PM CDT | Wind Advisory | OHX | 27 hr |
| Oct 30, 2:57 PM CDT | Freeze Warning | OHX | 12 hr |
| Oct 31, 3:09 AM CDT | Freeze Watch | OHX | 8 hr |
| Oct 31, 11:00 AM CDT | Freeze Warning | OHX | 21 hr |
| Nov 8, 5:27 AM CST | Dense Fog Advisory | OHX | 4 hr |
| Nov 13, 12:53 AM CST | Freezing Fog Advisory | OHX | 8 hr |
| Dec 17, 1:24 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 17, 5:24 PM CST | Severe Thunderstorm Warning | OHX | 20 min |
| Dec 19, 10:01 AM CST | Wind Advisory | OHX | 54 hr |
| Dec 24, 6:25 PM CST | Dense Fog Advisory | OHX | 14 hr |
| Dec 29, 6:16 PM CST | Winter Weather Advisory | OHX | 5 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 | 12 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 8 |
| Mesoscale Discussion | 37 |
| Special Weather Statement | 11 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Flood Watch | 1 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Weather Advisory | 2 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 3 |
| Frost Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20112013
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.