Alert archive / Tennessee / Hamilton County
Weather alerts in Hamilton County, Tennessee, 2016
122 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 122
- Warnings
- 38
- Watches
- 10
- Advisories
- 30
- Busiest month
- November30 alerts
- Busiest day
- November 30, 201624 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 4 tornado warnings covering Hamilton County in 2016 had a tornado report inside them.
Hamilton County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 3 | 25% | 0 | ||
| Severe thunderstorm warnings | 24 | 19 | 21% | 13 | 85% | 23 min |
| Flash flood warnings | 1 | 1 | 0% | 2 | 50% | 79 min |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 12 | 4 | 67% | 5 | 100% | 24 min |
| NWS Morristown, TN: severe thunderstorm warnings | 215 | 159 | 26% | 274 | 83% | 20 min |
| NWS Morristown, TN: flash flood warnings | 12 | 8 | 33% | 14 | 71% | 36 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 19, 5:07 AM EST | Winter Weather Advisory | MRX | 41 hr |
| Jan 21, 5:21 AM EST | Winter Weather Advisory | MRX | 56 hr |
| Feb 1, 2:50 PM EST | Wind Advisory | MRX | 42 hr |
| Feb 2, 2:46 AM EST | Dense Fog Advisory | MRX | 6 hr |
| Feb 3, 2:37 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 3, 3:20 AM EST | Severe Thunderstorm Warning | MRX | 40 min |
| Feb 3, 3:45 AM EST | Severe Thunderstorm Warning | MRX | 45 min |
| Feb 3, 4:42 AM EST | River Flood Warning | FFC | 46 hr |
| Feb 3, 5:30 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 3, 7:22 AM EST | River Flood Warning | MRX | 56 hr |
| Feb 3, 8:12 AM EST | River Flood Warning | FFC | 58 hr |
| Feb 3, 8:23 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 7, 3:32 PM EST | Winter Weather Advisory | MRX | 3 days |
| Feb 15, 11:30 AM EST | Flood Watch | MRX | 16 hr |
| Feb 15, 3:03 PM EST | Areal Flood Advisory | MRX | 117 min |
| Feb 23, 3:31 AM EST | Flash Flood Watch | MRX | 31 hr |
| Feb 23, 3:38 PM EST | Wind Advisory | MRX | 33 hr |
| Feb 23, 3:40 PM EST | River Flood Warning | FFC | 64 hr |
| Feb 23, 3:40 PM EST | River Flood Warning | FFC | 65 hr |
| Feb 24, 9:26 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 24, 11:20 AM EST | River Flood Warning | MRX | 34 hr |
| Mar 1, 2:00 PM EST | Mesoscale Discussion | SPC | 90 min |
| Mar 19, 10:04 PM EDT | Freeze Watch | MRX | 16 hr |
| Mar 20, 2:29 PM EDT | Freeze Warning | MRX | 19 hr |
| Mar 21, 3:09 AM EDT | Freeze Watch | MRX | 12 hr |
| Mar 21, 2:46 PM EDT | Freeze Warning | MRX | 19 hr |
| Mar 31, 8:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Mar 31, 9:14 PM EDT | Tornado Watch | SPC | 18 hr |
| Mar 31, 11:11 PM EDT | Special Weather Statement | MRX | 49 min |
| Mar 31, 11:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Mar 31, 11:31 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Apr 6, 7:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 6, 8:18 PM EDT | Special Weather Statement | MRX | 42 min |
| Apr 6, 9:01 PM EDT | Special Weather Statement | MRX | 44 min |
| Apr 9, 3:27 AM EDT | Freeze Warning | MRX | 31 hr |
| Apr 30, 5:51 PM EDT | Mesoscale Discussion | SPC | 54 min |
| May 4, 5:16 PM EDT | Special Weather Statement | MRX | 59 min |
| May 4, 7:35 PM EDT | Special Weather Statement | MRX | 55 min |
| May 12, 2:46 PM EDT | Special Weather Statement | MRX | 44 min |
| May 12, 3:49 PM EDT | Special Weather Statement | MRX | 41 min |
| Jun 2, 3:43 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jun 3, 4:11 PM EDT | Severe Thunderstorm Warning | MRX | 34 min |
| Jun 13, 8:34 PM EDT | Special Weather Statement | MRX | 41 min |
| Jun 15, 4:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 15, 7:13 PM EDT | Severe Thunderstorm Warning | MRX | 62 min |
| Jun 15, 8:11 PM EDT | Special Weather Statement | MRX | 49 min |
| Jun 28, 12:46 AM EDT | Areal Flood Advisory | MRX | 119 min |
| Jul 6, 4:48 PM EDT | Special Weather Statement | MRX | 27 min |
| Jul 6, 5:21 PM EDT | Special Weather Statement | MRX | 39 min |
| Jul 6, 5:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 6, 8:12 PM EDT | Severe Thunderstorm Warning | MRX | 33 min |
| Jul 7, 4:35 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 7, 6:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 8, 3:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jul 8, 11:47 PM EDT | Severe Thunderstorm Warning | MRX | 28 min |
| Jul 9, 12:10 AM EDT | Severe Thunderstorm Warning | MRX | 50 min |
| Jul 14, 4:28 PM EDT | Severe Thunderstorm Warning | MRX | 47 min |
| Jul 16, 1:09 PM EDT | Special Weather Statement | MRX | 51 min |
| Jul 16, 1:47 PM EDT | Severe Thunderstorm Warning | MRX | 28 min |
| Jul 23, 12:13 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 24, 5:05 PM EDT | Special Weather Statement | MRX | 40 min |
| Jul 24, 6:24 PM EDT | Severe Thunderstorm Warning | MRX | 36 min |
| Jul 24, 6:59 PM EDT | Special Weather Statement | MRX | 46 min |
| Jul 24, 7:02 PM EDT | Areal Flood Advisory | MRX | 118 min |
| Jul 24, 8:17 PM EDT | Areal Flood Advisory | MRX | 118 min |
| Jul 25, 4:13 PM EDT | Special Weather Statement | MRX | 47 min |
| Jul 25, 5:38 PM EDT | Special Weather Statement | MRX | 37 min |
| Aug 2, 4:16 PM EDT | Special Weather Statement | MRX | 44 min |
| Aug 2, 4:27 PM EDT | Special Weather Statement | MRX | 63 min |
| Aug 7, 7:49 PM EDT | Areal Flood Advisory | MRX | 116 min |
| Aug 7, 9:59 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Aug 8, 5:45 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Aug 17, 7:14 PM EDT | Severe Thunderstorm Warning | MRX | 46 min |
| Aug 17, 7:19 PM EDT | Areal Flood Advisory | MRX | 116 min |
| Aug 18, 8:15 AM EDT | Severe Thunderstorm Warning | MRX | 45 min |
| Aug 18, 9:00 AM EDT | Severe Thunderstorm Warning | MRX | 45 min |
| Aug 18, 3:34 PM EDT | Special Weather Statement | MRX | 41 min |
| Aug 19, 1:29 PM EDT | Special Weather Statement | MRX | 46 min |
| Aug 19, 2:18 PM EDT | Special Weather Statement | MRX | 42 min |
| Aug 19, 3:27 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 28, 4:09 PM EDT | Severe Thunderstorm Warning | MRX | 51 min |
| Aug 28, 5:00 PM EDT | Special Weather Statement | MRX | 45 min |
| Sep 26, 1:29 PM EDT | Special Weather Statement | MRX | 31 min |
| Sep 26, 1:59 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 26, 2:42 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 26, 4:49 PM EDT | Special Weather Statement | MRX | 41 min |
| Oct 20, 4:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 10, 3:21 PM EST | Frost Advisory | MRX | 17 hr |
| Nov 11, 3:38 PM EST | Freeze Watch | MRX | 23 hr |
| Nov 12, 2:52 PM EST | Frost Advisory | MRX | 18 hr |
| Nov 25, 6:46 AM EST | Dense Fog Advisory | MRX | 2 hr |
| Nov 27, 2:52 PM EST | Wind Advisory | MRX | 40 hr |
| Nov 28, 9:12 PM EST | Special Weather Statement | MRX | 63 min |
| Nov 29, 10:28 PM EST | Mesoscale Discussion | SPC | 62 min |
| Nov 29, 11:11 PM EST | Tornado Watch | SPC | 5 hr |
| Nov 29, 11:58 PM EST | Tornado Warning | MRX | 47 min |
| Nov 30, 12:09 AM EST | Severe Thunderstorm Warning | MRX | 36 min |
| Nov 30, 12:17 AM EST | Mesoscale Discussion | SPC | 118 min |
| Nov 30, 12:34 AM EST | Tornado Warning | MRX | 26 min |
| Nov 30, 12:54 AM EST | Tornado Warning | MRX | 36 min |
| Nov 30, 1:41 AM EST | Severe Thunderstorm Warning | MRX | 34 min |
| Nov 30, 2:00 AM EST | Tornado Warning | MRX | 30 min |
| Nov 30, 2:07 AM EST | Mesoscale Discussion | SPC | 53 min |
| Nov 30, 3:41 AM EST | Severe Thunderstorm Warning | MRX | 34 min |
| Nov 30, 3:54 AM EST | Tornado Watch | SPC | 7 hr |
| Nov 30, 4:12 AM EST | Severe Thunderstorm Warning | MRX | 33 min |
| Nov 30, 4:42 AM EST | Severe Thunderstorm Warning | MRX | 33 min |
| Nov 30, 4:53 AM EST | Severe Thunderstorm Warning | MRX | 37 min |
| Nov 30, 5:30 AM EST | Severe Thunderstorm Warning | MRX | 30 min |
| Nov 30, 5:46 AM EST | Severe Thunderstorm Warning | MRX | 44 min |
| Nov 30, 5:51 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Nov 30, 5:54 AM EST | Severe Thunderstorm Warning | MRX | 36 min |
| Nov 30, 6:10 AM EST | Mesoscale Discussion | SPC | 95 min |
| Nov 30, 6:25 AM EST | Severe Thunderstorm Warning | MRX | 35 min |
| Nov 30, 7:46 AM EST | Special Weather Statement | MRX | 44 min |
| Nov 30, 8:26 AM EST | Flash Flood Warning | MRX | 3 hr |
| Nov 30, 11:26 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Dec 16, 4:11 AM EST | Wind Advisory | MRX | 51 hr |
| Dec 18, 2:03 AM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Dec 18, 4:24 AM EST | Mesoscale Discussion | SPC | 66 min |
| Dec 27, 5:22 AM EST | Special Weather Statement | MRX | 83 min |
| Dec 28, 11:33 PM EST | Special Weather Statement | MRX | 42 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 | 24 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 28 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 6 |
| Flash Flood Watch | 1 |
| Flood Watch | 1 |
| Areal Flood Advisory | 19 |
| Winter | |
| Winter Weather Advisory | 3 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 3 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20152017
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.