Alert archive / Tennessee / Hamilton County
Weather alerts in Hamilton County, Tennessee, 2010
146 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Hamilton County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 146
- Warnings
- 45
- Watches
- 16
- Advisories
- 52
- Busiest month
- January22 alerts
- Busiest day
- October 26, 201011 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
3 of 8 tornado warnings covering Hamilton County in 2010 had a tornado report inside them; 4 of 4 tornado reports fell inside a warning, on average 31 minutes after it went out.
Hamilton County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 8 | 3 | 63% | 4 | 100% | 31 min |
| Severe thunderstorm warnings | 26 | 21 | 19% | 20 | 80% | 34 min |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 30 | 6 | 80% | 9 | 89% | 20 min |
| NWS Morristown, TN: severe thunderstorm warnings | 212 | 158 | 25% | 289 | 79% | 22 min |
| NWS Morristown, TN: flash flood warnings | 23 | 12 | 48% | 23 | 78% | 67 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 6, 3:06 PM EST | Winter Weather Advisory | MRX | 60 hr |
| Jan 20, 5:34 PM EST | Areal Flood Advisory | MRX | 4 hr |
| Jan 21, 3:43 PM EST | Severe Thunderstorm Warning | MRX | 62 min |
| Jan 21, 4:00 PM EST | Tornado Warning | MRX | 20 min |
| Jan 21, 4:16 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Jan 21, 6:14 PM EST | Mesoscale Discussion | SPC | 91 min |
| Jan 21, 6:43 PM EST | Tornado Warning | MRX | 47 min |
| Jan 21, 7:18 PM EST | Areal Flood Advisory | MRX | 117 min |
| Jan 21, 7:23 PM EST | Severe Thunderstorm Warning | MRX | 67 min |
| Jan 21, 9:03 PM EST | Mesoscale Discussion | SPC | 57 min |
| Jan 23, 3:42 PM EST | Wind Advisory | MRX | 24 hr |
| Jan 24, 1:10 PM EST | Flood Watch | MRX | 8 hr |
| Jan 24, 1:19 PM EST | Areal Flood Advisory | MRX | 5 hr |
| Jan 24, 6:14 PM EST | Areal Flood Advisory | MRX | 2 hr |
| Jan 25, 1:52 AM EST | Areal Flood Warning | MRX | 3 hr |
| Jan 25, 5:07 AM EST | Wind Advisory | MRX | 17 hr |
| Jan 25, 4:03 PM EST | River Flood Warning | MRX | 12 hr |
| Jan 27, 2:59 PM EST | Winter Storm Watch | MRX | 24 hr |
| Jan 28, 2:56 PM EST | Winter Storm Warning | MRX | 48 hr |
| Jan 28, 2:56 PM EST | Winter Weather Advisory | MRX | 27 hr |
| Jan 29, 11:45 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 30, 9:28 AM EST | Winter Weather Advisory | MRX | 17 hr |
| Feb 5, 2:09 PM EST | River Flood Warning | MRX | 33 hr |
| Feb 9, 4:25 AM EST | Wind Advisory | MRX | 47 hr |
| Feb 14, 3:44 AM EST | Winter Weather Advisory | MRX | 4 days |
| Feb 14, 10:42 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 1, 3:20 PM EST | Winter Weather Advisory | MRX | 28 hr |
| Mar 12, 3:42 AM EST | Flood Watch | MRX | 19 hr |
| Mar 12, 4:05 AM EST | Wind Advisory | MRX | 6 hr |
| Mar 12, 10:56 AM EST | Areal Flood Advisory | MRX | 4 hr |
| Mar 12, 11:18 AM EST | Severe Thunderstorm Warning | MRX | 42 min |
| Mar 12, 11:32 AM EST | Mesoscale Discussion | SPC | 58 min |
| Mar 12, 12:04 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 12, 12:33 PM EST | Severe Thunderstorm Warning | MRX | 42 min |
| Mar 12, 1:13 PM EST | Severe Thunderstorm Warning | MRX | 47 min |
| Mar 12, 1:24 PM EST | Areal Flood Warning | MRX | 5 hr |
| Mar 27, 2:40 AM EDT | Wind Advisory | MRX | 36 hr |
| Apr 24, 12:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Apr 24, 6:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 24, 7:15 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 24, 7:26 PM EDT | Severe Thunderstorm Warning | MRX | 53 min |
| Apr 25, 12:05 AM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 25, 1:04 AM EDT | Areal Flood Advisory | MRX | 116 min |
| May 1, 3:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 1, 6:04 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 1, 6:35 PM EDT | Tornado Watch | SPC | 4 hr |
| May 1, 8:07 PM EDT | Mesoscale Discussion | SPC | 53 min |
| May 2, 3:31 AM EDT | Flash Flood Watch | MRX | 27 hr |
| May 2, 9:19 AM EDT | River Flood Warning | MRX | 33 hr |
| May 2, 11:42 PM EDT | Areal Flood Advisory | MRX | 6 hr |
| May 3, 1:11 AM EDT | Areal Flood Warning | MRX | 6 hr |
| May 3, 5:27 AM EDT | River Flood Warning | FFC | 20 hr |
| May 15, 2:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 5:09 PM EDT | Severe Thunderstorm Warning | MRX | 51 min |
| May 17, 12:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| May 28, 1:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 28, 1:52 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 28, 4:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| May 30, 9:22 PM EDT | Areal Flood Advisory | MRX | 113 min |
| Jun 2, 5:17 AM EDT | Dense Fog Advisory | MRX | 4 hr |
| Jun 2, 3:21 PM EDT | Severe Thunderstorm Warning | MRX | 39 min |
| Jun 2, 3:53 PM EDT | Areal Flood Advisory | MRX | 112 min |
| Jun 4, 7:58 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jun 5, 5:45 AM EDT | Dense Fog Advisory | MRX | 3 hr |
| Jun 10, 4:47 PM EDT | Severe Thunderstorm Warning | MRX | 58 min |
| Jun 11, 3:19 PM EDT | Severe Thunderstorm Warning | MRX | 41 min |
| Jun 15, 1:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 1:14 PM EDT | Severe Thunderstorm Warning | MRX | 61 min |
| Jun 15, 1:30 PM EDT | Areal Flood Advisory | MRX | 57 min |
| Jun 15, 4:52 PM EDT | Severe Thunderstorm Warning | MRX | 53 min |
| Jun 15, 5:28 PM EDT | Severe Thunderstorm Warning | MRX | 62 min |
| Jun 15, 5:38 PM EDT | Areal Flood Advisory | MRX | 112 min |
| Jun 17, 12:25 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 17, 3:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 11:30 AM EDT | Mesoscale Discussion | SPC | 60 min |
| Jun 25, 3:09 PM EDT | Severe Thunderstorm Warning | MRX | 66 min |
| Jul 9, 1:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 13, 12:05 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 13, 3:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 23, 5:10 AM EDT | Heat Advisory | MRX | 15 hr |
| Jul 23, 2:57 PM EDT | Heat Advisory | MRX | 29 hr |
| Jul 26, 1:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jul 26, 1:51 PM EDT | Severe Thunderstorm Warning | MRX | 39 min |
| Jul 26, 1:56 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 26, 2:11 PM EDT | Flash Flood Warning | MRX | 3 hr |
| Jul 26, 2:27 PM EDT | Severe Thunderstorm Warning | MRX | 48 min |
| Jul 26, 3:21 PM EDT | Severe Thunderstorm Warning | MRX | 39 min |
| Jul 26, 3:29 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 26, 4:07 PM EDT | Areal Flood Advisory | MRX | 113 min |
| Jul 26, 4:10 PM EDT | Severe Thunderstorm Warning | MRX | 35 min |
| Jul 31, 11:13 AM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 31, 2:33 PM EDT | Mesoscale Discussion | SPC | 27 min |
| Jul 31, 2:49 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 4:46 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 31, 7:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 31, 9:11 PM EDT | Mesoscale Discussion | SPC | 34 min |
| Aug 1, 3:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Aug 2, 3:19 PM EDT | Heat Advisory | MRX | 3 days |
| Aug 5, 1:15 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 5, 1:47 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 5, 4:33 PM EDT | Areal Flood Advisory | MRX | 117 min |
| Aug 5, 5:29 PM EDT | Severe Thunderstorm Warning | MRX | 61 min |
| Aug 5, 5:45 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Aug 5, 5:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 6, 5:05 PM EDT | Areal Flood Advisory | MRX | 115 min |
| Aug 10, 3:52 PM EDT | Heat Advisory | MRX | 47 hr |
| Aug 13, 2:34 AM EDT | Heat Advisory | MRX | 16 hr |
| Aug 18, 3:08 AM EDT | Flash Flood Watch | MRX | 31 hr |
| Aug 19, 11:09 PM EDT | Dense Fog Advisory | MRX | 10 hr |
| Aug 21, 1:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Sep 11, 7:29 PM EDT | Flash Flood Warning | MRX | 72 min |
| Sep 16, 8:30 PM EDT | Severe Thunderstorm Warning | MRX | 30 min |
| Sep 22, 5:08 PM EDT | Areal Flood Advisory | MRX | 112 min |
| Sep 27, 11:47 AM EDT | Severe Thunderstorm Warning | MRX | 43 min |
| Oct 5, 10:39 AM EDT | Frost Advisory | MRX | 22 hr |
| Oct 6, 2:51 PM EDT | Frost Advisory | MRX | 18 hr |
| Oct 15, 3:01 PM EDT | Frost Advisory | MRX | 17 hr |
| Oct 16, 2:50 PM EDT | Frost Advisory | MRX | 19 hr |
| Oct 25, 2:53 AM EDT | Severe Thunderstorm Warning | MRX | 22 min |
| Oct 25, 5:32 AM EDT | Severe Thunderstorm Warning | MRX | 43 min |
| Oct 25, 5:35 AM EDT | Tornado Watch | SPC | 7 hr |
| Oct 25, 5:38 AM EDT | Tornado Warning | MRX | 52 min |
| Oct 25, 6:18 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Oct 26, 2:33 AM EDT | Wind Advisory | MRX | 19 hr |
| Oct 26, 12:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Oct 26, 2:16 PM EDT | Tornado Watch | SPC | 8 hr |
| Oct 26, 2:56 PM EDT | Tornado Warning | MRX | 34 min |
| Oct 26, 3:19 PM EDT | Tornado Warning | MRX | 26 min |
| Oct 26, 4:10 PM EDT | Tornado Warning | MRX | 50 min |
| Oct 26, 4:24 PM EDT | Tornado Warning | MRX | 51 min |
| Oct 26, 5:11 PM EDT | Severe Thunderstorm Warning | MRX | 49 min |
| Oct 26, 6:09 PM EDT | Severe Thunderstorm Warning | MRX | 66 min |
| Oct 26, 6:16 PM EDT | Tornado Warning | MRX | 44 min |
| Oct 26, 7:32 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Oct 27, 11:05 PM EDT | Dense Fog Advisory | MRX | 8 hr |
| Nov 16, 11:15 AM EST | Severe Thunderstorm Warning | MRX | 60 min |
| Nov 23, 10:05 PM EST | Dense Fog Advisory | MRX | 11 hr |
| Nov 28, 9:30 PM EST | Wind Advisory | MRX | 37 hr |
| Nov 30, 5:44 AM EST | Areal Flood Advisory | MRX | 4 hr |
| Nov 30, 9:37 AM EST | Areal Flood Advisory | MRX | 4 hr |
| Nov 30, 10:38 AM EST | Mesoscale Discussion | SPC | 97 min |
| Dec 1, 7:41 AM EST | Areal Flood Advisory | MRX | 6 hr |
| Dec 11, 3:31 PM EST | Winter Weather Advisory | MRX | 51 hr |
| Dec 15, 3:51 AM EST | Winter Weather Advisory | MRX | 32 hr |
| Dec 24, 3:22 PM EST | Winter Weather Advisory | MRX | 25 hr |
| Dec 25, 9:11 AM EST | Winter Storm Warning | MRX | 7 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 | 26 |
| Tornado Warning | 8 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 33 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 2 |
| River Flood Warning | 4 |
| Flash Flood Watch | 2 |
| Flood Watch | 2 |
| Areal Flood Advisory | 23 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Frost Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.