Alert archive / Tennessee / Hamilton County
Weather alerts in Hamilton County, Tennessee, 2008
106 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 106
- Warnings
- 32
- Watches
- 15
- Advisories
- 31
- Busiest month
- July23 alerts
- Busiest day
- February 6, 20087 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 2 tornado warnings covering Hamilton County in 2008 had a tornado report inside them.
Hamilton County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 29 | 26 | 10% | 22 | 86% | 18 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 7 | 0 | 100% | 3 | 0% | |
| NWS Morristown, TN: severe thunderstorm warnings | 298 | 230 | 23% | 400 | 87% | 21 min |
| NWS Morristown, TN: flash flood warnings | 5 | 2 | 60% | 8 | 25% | 48 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 8, 7:26 PM EST | Lake Wind Advisory | MRX | 8 hr |
| Jan 8, 10:32 PM EST | Mesoscale Discussion | SPC | 58 min |
| Jan 10, 3:47 AM EST | Wind Advisory | MRX | 27 hr |
| Jan 10, 4:05 PM EST | Mesoscale Discussion | SPC | 115 min |
| Jan 10, 7:29 PM EST | Mesoscale Discussion | SPC | 61 min |
| Jan 10, 10:36 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Jan 16, 4:13 AM EST | Winter Weather Advisory | MRX | 30 hr |
| Jan 29, 3:27 PM EST | Wind Advisory | MRX | 16 hr |
| Jan 29, 8:12 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Jan 29, 9:43 PM EST | Severe Thunderstorm Warning | MRX | 47 min |
| Jan 29, 10:24 PM EST | Severe Thunderstorm Warning | MRX | 36 min |
| Jan 29, 10:58 PM EST | Severe Thunderstorm Warning | MRX | 47 min |
| Feb 1, 11:26 AM EST | Lake Wind Advisory | MRX | 8 hr |
| Feb 5, 3:10 AM EST | Dense Fog Advisory | MRX | 6 hr |
| Feb 5, 3:10 AM EST | Wind Advisory | MRX | 40 hr |
| Feb 6, 3:41 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 6, 5:06 AM EST | Tornado Watch | SPC | 6 hr |
| Feb 6, 6:37 AM EST | Tornado Warning | MRX | 38 min |
| Feb 6, 7:10 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 6, 7:14 AM EST | Severe Thunderstorm Warning | MRX | 46 min |
| Feb 6, 7:18 AM EST | Tornado Warning | MRX | 57 min |
| Feb 6, 8:11 AM EST | Areal Flood Advisory | MRX | 2 hr |
| Feb 17, 2:57 AM EST | Lake Wind Advisory | MRX | 16 hr |
| Feb 23, 2:53 AM EST | Dense Fog Advisory | MRX | 7 hr |
| Mar 3, 3:22 PM EST | Wind Advisory | MRX | 28 hr |
| Mar 4, 2:25 AM EST | Tornado Watch | SPC | 8 hr |
| Mar 4, 11:17 AM EST | Mesoscale Discussion | SPC | 118 min |
| Mar 4, 12:04 PM EST | Tornado Watch | SPC | 8 hr |
| Mar 4, 12:56 PM EST | Severe Thunderstorm Warning | MRX | 49 min |
| Mar 7, 2:04 PM EST | Winter Weather Advisory | MRX | 29 hr |
| Mar 14, 5:37 PM EDT | Mesoscale Discussion | SPC | 23 min |
| Mar 15, 1:39 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Mar 15, 3:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 18, 3:39 AM EDT | Wind Advisory | MRX | 38 hr |
| Mar 19, 2:32 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Mar 19, 3:03 PM EDT | Tornado Watch | SPC | 5 hr |
| Mar 19, 4:52 PM EDT | Severe Thunderstorm Warning | MRX | 53 min |
| Mar 19, 4:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 11, 2:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 11, 4:00 PM EDT | Tornado Watch | SPC | 5 hr |
| Apr 11, 4:46 PM EDT | Severe Thunderstorm Warning | MRX | 29 min |
| Apr 11, 6:34 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 8, 11:07 AM EDT | Mesoscale Discussion | SPC | 83 min |
| May 8, 1:37 PM EDT | Mesoscale Discussion | SPC | 83 min |
| May 8, 1:40 PM EDT | Tornado Watch | SPC | 5 hr |
| May 9, 4:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 9, 7:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| May 9, 8:55 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 9, 9:01 PM EDT | Severe Thunderstorm Warning | MRX | 29 min |
| May 10, 5:05 AM EDT | Mesoscale Discussion | SPC | 115 min |
| May 10, 10:06 PM EDT | Tornado Watch | SPC | 7 hr |
| May 11, 12:47 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| May 11, 4:48 AM EDT | Lake Wind Advisory | MRX | 15 hr |
| May 18, 6:32 PM EDT | Severe Thunderstorm Warning | MRX | 58 min |
| May 18, 7:26 PM EDT | Severe Thunderstorm Warning | MRX | 64 min |
| May 19, 3:12 PM EDT | Lake Wind Advisory | MRX | 25 hr |
| May 20, 2:59 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 20, 4:27 PM EDT | Severe Thunderstorm Warning | MRX | 63 min |
| May 31, 6:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 1, 5:22 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 1, 6:35 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 1, 10:09 AM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jun 2, 4:21 AM EDT | Dense Fog Advisory | MRX | 6 hr |
| Jun 9, 2:00 PM EDT | Severe Thunderstorm Warning | MRX | 45 min |
| Jun 21, 4:30 PM EDT | Severe Thunderstorm Warning | MRX | 29 min |
| Jun 23, 3:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 23, 6:07 PM EDT | Severe Thunderstorm Warning | MRX | 38 min |
| Jul 4, 1:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 1:04 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 9, 12:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 4:19 PM EDT | Severe Thunderstorm Warning | MRX | 41 min |
| Jul 9, 5:14 PM EDT | Severe Thunderstorm Warning | MRX | 31 min |
| Jul 20, 4:02 PM EDT | Severe Thunderstorm Warning | MRX | 42 min |
| Jul 21, 3:44 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 21, 6:03 PM EDT | Severe Thunderstorm Warning | MRX | 57 min |
| Jul 21, 6:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 21, 6:57 PM EDT | Severe Thunderstorm Warning | MRX | 48 min |
| Jul 22, 1:34 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 22, 2:35 PM EDT | Severe Thunderstorm Warning | MRX | 55 min |
| Jul 22, 3:20 PM EDT | Severe Thunderstorm Warning | MRX | 55 min |
| Jul 22, 3:23 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 22, 3:58 PM EDT | Severe Thunderstorm Warning | MRX | 62 min |
| Jul 22, 4:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 22, 4:19 PM EDT | Severe Thunderstorm Warning | MRX | 56 min |
| Jul 26, 3:21 PM EDT | Areal Flood Advisory | MRX | 114 min |
| Jul 28, 2:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 3:03 PM EDT | Severe Thunderstorm Warning | MRX | 57 min |
| Jul 31, 3:23 PM EDT | Severe Thunderstorm Warning | MRX | 52 min |
| Jul 31, 3:37 PM EDT | Severe Thunderstorm Warning | MRX | 38 min |
| Jul 31, 4:16 PM EDT | Severe Thunderstorm Warning | MRX | 29 min |
| Aug 2, 6:01 PM EDT | Severe Thunderstorm Warning | MRX | 44 min |
| Aug 7, 11:29 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 25, 3:25 PM EDT | Flood Watch | MRX | 36 hr |
| Aug 25, 5:12 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 26, 6:55 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 26, 9:49 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 8, 7:25 PM EDT | Severe Thunderstorm Warning | MRX | 50 min |
| Nov 14, 2:45 AM EST | Dense Fog Advisory | MRX | 7 hr |
| Dec 8, 3:37 PM EST | Wind Advisory | MRX | 42 hr |
| Dec 10, 2:25 AM EST | Mesoscale Discussion | SPC | 65 min |
| Dec 10, 8:37 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Dec 10, 1:30 PM EST | Flood Watch | MRX | 24 hr |
| Dec 11, 10:11 AM EST | Areal Flood Advisory | MRX | 6 hr |
| Dec 11, 2:47 PM EST | Winter Weather Advisory | MRX | 15 hr |
| Dec 11, 8:18 PM EST | River Flood Warning | MRX | 11 hr |
| Dec 23, 3:11 PM EST | Wind Advisory | MRX | 31 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 | 29 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 7 |
| Mesoscale Discussion | 28 |
| Flooding | |
| River Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 12 |
| Winter | |
| Winter Weather Advisory | 3 |
| Wind and dust | |
| Lake Wind Advisory | 5 |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.