Alert archive / Tennessee / Washington County
Weather alerts in Washington County, Tennessee, 2019
80 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Washington County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 80
- Warnings
- 17
- Watches
- 10
- Advisories
- 30
- Busiest month
- June19 alerts
- Busiest day
- June 20, 20196 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Washington County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 8 | 6 | 25% | 5 | 100% | 18 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 5 | 0 | 100% | 3 | 0% | |
| NWS Morristown, TN: severe thunderstorm warnings | 126 | 101 | 20% | 239 | 74% | 20 min |
| NWS Morristown, TN: flash flood warnings | 24 | 12 | 50% | 37 | 51% | 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 18, 5:30 AM EST | Dense Fog Advisory | MRX | 5 hr |
| Jan 23, 3:54 AM EST | Wind Advisory | MRX | 18 hr |
| Jan 27, 3:11 PM EST | Winter Storm Watch | MRX | 13 hr |
| Jan 28, 3:56 AM EST | Winter Weather Advisory | MRX | 35 hr |
| Feb 6, 9:12 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 7, 12:24 AM EST | Areal Flood Advisory | MRX | 2 hr |
| Feb 7, 2:28 AM EST | Areal Flood Warning | MRX | 2 hr |
| Feb 7, 4:11 AM EST | Areal Flood Warning | MRX | 2 hr |
| Feb 7, 5:42 AM EST | Areal Flood Warning | MRX | 9 hr |
| Feb 11, 3:16 AM EST | Flash Flood Watch | MRX | 40 hr |
| Feb 19, 11:14 PM EST | Areal Flood Advisory | MRX | 3 hr |
| Feb 21, 11:29 AM EST | Flood Watch | MRX | 68 hr |
| Feb 23, 5:17 AM EST | Areal Flood Advisory | MRX | 5 hr |
| Feb 23, 8:42 AM EST | Areal Flood Warning | MRX | 6 hr |
| Feb 23, 11:03 AM EST | Wind Advisory | MRX | 44 hr |
| Feb 23, 2:44 PM EST | Areal Flood Warning | MRX | 3 days |
| Mar 30, 6:00 AM EDT | Freeze Watch | MRX | 22 hr |
| Mar 31, 4:03 AM EDT | Freeze Warning | MRX | 30 hr |
| Apr 8, 12:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Apr 13, 3:14 PM EDT | Wind Advisory | MRX | 29 hr |
| Apr 14, 4:28 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 14, 7:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 15, 3:37 PM EDT | Frost Advisory | MRX | 16 hr |
| Apr 19, 4:33 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Apr 19, 9:40 PM EDT | River Flood Advisory | MRX | 7 hr |
| May 3, 12:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 1:37 PM EDT | Severe Thunderstorm Warning | MRX | 53 min |
| May 4, 3:12 PM EDT | Severe Thunderstorm Warning | MRX | 48 min |
| May 18, 5:32 PM EDT | Severe Thunderstorm Warning | MRX | 43 min |
| May 18, 7:14 PM EDT | Severe Thunderstorm Warning | MRX | 46 min |
| Jun 6, 8:48 PM EDT | Areal Flood Advisory | MRX | 117 min |
| Jun 6, 10:29 PM EDT | Areal Flood Advisory | MRX | 2 hr |
| Jun 9, 4:20 AM EDT | Areal Flood Advisory | MRX | 4 hr |
| Jun 9, 12:10 PM EDT | Areal Flood Advisory | MRX | 5 hr |
| Jun 10, 1:22 PM EDT | Areal Flood Advisory | MRX | 4 hr |
| Jun 20, 1:47 AM EDT | Special Weather Statement | MRX | 43 min |
| Jun 20, 8:02 AM EDT | Special Weather Statement | MRX | 58 min |
| Jun 20, 8:38 AM EDT | Special Weather Statement | MRX | 67 min |
| Jun 20, 5:28 PM EDT | Special Weather Statement | MRX | 47 min |
| Jun 20, 5:41 PM EDT | Severe Thunderstorm Warning | MRX | 49 min |
| Jun 20, 7:21 PM EDT | Special Weather Statement | MRX | 39 min |
| Jun 21, 10:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 21, 10:03 PM EDT | Special Weather Statement | MRX | 42 min |
| Jun 22, 12:26 AM EDT | Severe Thunderstorm Warning | MRX | 49 min |
| Jun 22, 1:01 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 22, 1:08 AM EDT | Severe Thunderstorm Warning | MRX | 56 min |
| Jun 24, 1:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 24, 1:49 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 7:06 PM EDT | Special Weather Statement | MRX | 39 min |
| Jul 7, 12:36 AM EDT | Areal Flood Advisory | MRX | 114 min |
| Jul 22, 3:18 AM EDT | Flash Flood Watch | MRX | 32 hr |
| Jul 31, 8:19 PM EDT | Special Weather Statement | MRX | 26 min |
| Jul 31, 9:32 PM EDT | Special Weather Statement | MRX | 28 min |
| Aug 1, 8:22 PM EDT | Areal Flood Advisory | MRX | 113 min |
| Aug 3, 5:40 AM EDT | Dense Fog Advisory | MRX | 4 hr |
| Aug 13, 12:00 PM EDT | Mesoscale Discussion | SPC | 105 min |
| Aug 13, 1:23 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 13, 1:37 PM EDT | Special Weather Statement | MRX | 68 min |
| Aug 19, 5:03 PM EDT | Special Weather Statement | MRX | 42 min |
| Aug 22, 11:51 AM EDT | Special Weather Statement | MRX | 39 min |
| Aug 22, 10:46 PM EDT | Special Weather Statement | MRX | 59 min |
| Aug 22, 11:10 PM EDT | Special Weather Statement | MRX | 65 min |
| Aug 23, 9:49 PM EDT | Areal Flood Advisory | MRX | 116 min |
| Aug 23, 10:37 PM EDT | Flash Flood Warning | MRX | 113 min |
| Sep 27, 1:42 AM EDT | Dense Fog Advisory | MRX | 7 hr |
| Oct 17, 3:19 PM EDT | Frost Advisory | MRX | 18 hr |
| Oct 21, 4:01 AM EDT | Dense Fog Advisory | MRX | 5 hr |
| Oct 23, 3:17 PM EDT | Frost Advisory | MRX | 18 hr |
| Oct 28, 6:11 AM EDT | Dense Fog Advisory | MRX | 4 hr |
| Oct 31, 3:16 AM EDT | Freeze Warning | MRX | 31 hr |
| Oct 31, 12:45 PM EDT | Tornado Watch | SPC | 4 hr |
| Oct 31, 12:58 PM EDT | Severe Thunderstorm Warning | MRX | 27 min |
| Nov 1, 3:32 AM EDT | Freeze Watch | MRX | 12 hr |
| Nov 1, 3:25 PM EDT | Freeze Warning | MRX | 19 hr |
| Nov 11, 3:30 AM EST | Winter Weather Advisory | MRX | 31 hr |
| Nov 26, 1:59 PM EST | Wind Advisory | MRX | 27 hr |
| Dec 1, 2:39 PM EST | Winter Weather Advisory | MRX | 33 hr |
| Dec 25, 2:58 AM EST | Dense Fog Advisory | MRX | 7 hr |
| Dec 29, 11:16 PM EST | Special Weather Statement | MRX | 44 min |
| Dec 30, 2:37 AM EST | Special Weather Statement | MRX | 38 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 | 8 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 16 |
| Flooding | |
| Areal Flood Warning | 5 |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 13 |
| River Flood Advisory | 1 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 3 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Frost Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.