Alert archive / Tennessee / Chester County
Weather alerts in Chester County, Tennessee, 2012
146 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Chester County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 146
- Warnings
- 46
- Watches
- 20
- Advisories
- 32
- Busiest month
- March25 alerts
- Busiest day
- March 2, 20128 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 1 tornado reports fell inside a warning.
Chester County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 34 | 15 | 56% | 0 | ||
| Flash flood warnings | 6 | 1 | 83% | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Memphis, TN: tornado warnings | 76 | 11 | 86% | 22 | 68% | 14 min |
| NWS Memphis, TN: severe thunderstorm warnings | 482 | 201 | 58% | 468 | 72% | 22 min |
| NWS Memphis, TN: flash flood warnings | 64 | 16 | 75% | 39 | 82% | 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 3:16 AM CST | Wind Advisory | MEG | 14 hr |
| Jan 11, 2:47 AM CST | Dense Fog Advisory | MEG | 7 hr |
| Jan 12, 3:42 AM CST | Wind Advisory | MEG | 13 hr |
| Jan 14, 3:07 AM CST | Wind Advisory | MEG | 9 hr |
| Jan 14, 2:03 PM CST | Red Flag Warning | MEG | 2 hr |
| Jan 17, 10:33 AM CST | Mesoscale Discussion | SPC | 57 min |
| Jan 20, 10:02 PM CST | Mesoscale Discussion | SPC | 88 min |
| Jan 20, 10:35 PM CST | Tornado Watch | SPC | 8 hr |
| Jan 22, 1:12 PM CST | Wind Advisory | MEG | 14 hr |
| Jan 22, 9:47 PM CST | Mesoscale Discussion | SPC | 58 min |
| Jan 22, 10:59 PM CST | Tornado Watch | SPC | 7 hr |
| Jan 22, 11:10 PM CST | Severe Thunderstorm Warning | MEG | 45 min |
| Jan 22, 11:22 PM CST | Severe Thunderstorm Warning | MEG | 53 min |
| Jan 22, 11:46 PM CST | Severe Thunderstorm Warning | MEG | 44 min |
| Feb 13, 3:44 AM CST | Winter Weather Advisory | MEG | 17 hr |
| Feb 18, 3:32 PM CST | Wind Advisory | MEG | 12 hr |
| Feb 23, 4:11 AM CST | Wind Advisory | MEG | 14 hr |
| Feb 29, 12:34 AM CST | Wind Advisory | MEG | 10 hr |
| Feb 29, 12:49 AM CST | Mesoscale Discussion | SPC | 56 min |
| Feb 29, 11:11 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 29, 11:31 AM CST | Tornado Watch | SPC | 8 hr |
| Feb 29, 12:49 PM CST | Severe Thunderstorm Warning | MEG | 26 min |
| Feb 29, 3:34 PM CST | Mesoscale Discussion | SPC | 116 min |
| Mar 2, 2:50 AM CST | Wind Advisory | MEG | 15 hr |
| Mar 2, 9:22 AM CST | Mesoscale Discussion | SPC | 113 min |
| Mar 2, 12:05 PM CST | Mesoscale Discussion | SPC | 85 min |
| Mar 2, 1:20 PM CST | Tornado Watch | SPC | 9 hr |
| Mar 2, 3:02 PM CST | Severe Thunderstorm Warning | MEG | 28 min |
| Mar 2, 3:25 PM CST | Mesoscale Discussion | SPC | 65 min |
| Mar 2, 4:08 PM CST | Severe Thunderstorm Warning | MEG | 37 min |
| Mar 2, 4:28 PM CST | Severe Thunderstorm Warning | MEG | 32 min |
| Mar 3, 8:49 PM CST | Fire Weather Watch | MEG | 60 min |
| Mar 3, 9:53 PM CST | Fire Weather Watch | MEG | 5 hr |
| Mar 4, 3:07 AM CST | Red Flag Warning | MEG | 15 hr |
| Mar 12, 4:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Mar 14, 2:27 PM CDT | Special Weather Statement | MEG | 33 min |
| Mar 14, 2:33 PM CDT | Severe Thunderstorm Warning | MEG | 42 min |
| Mar 14, 3:01 PM CDT | Mesoscale Discussion | SPC | 104 min |
| Mar 14, 3:06 PM CDT | Severe Thunderstorm Warning | MEG | 39 min |
| Mar 14, 3:09 PM CDT | Flash Flood Warning | MEG | 2 hr |
| Mar 15, 2:28 PM CDT | Severe Thunderstorm Warning | MEG | 32 min |
| Mar 15, 2:54 PM CDT | Flash Flood Warning | MEG | 96 min |
| Mar 15, 3:00 PM CDT | Severe Thunderstorm Warning | MEG | 27 min |
| Mar 15, 3:44 PM CDT | Mesoscale Discussion | SPC | 61 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, 12:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 5, 12:18 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 5, 12:42 PM CDT | Severe Thunderstorm Warning | MEG | 33 min |
| Apr 5, 2:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Apr 11, 3:30 AM CDT | Frost Advisory | MEG | 29 hr |
| Apr 22, 4:04 AM CDT | Frost Advisory | MEG | 4 hr |
| Apr 22, 1:16 PM CDT | Wind Advisory | MEG | 6 hr |
| Apr 23, 4:01 AM CDT | Frost Advisory | MEG | 28 hr |
| Apr 26, 4:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 26, 5:35 PM CDT | Severe Thunderstorm Warning | MEG | 40 min |
| Apr 26, 6:10 PM CDT | Severe Thunderstorm Warning | MEG | 50 min |
| Apr 26, 6:56 PM CDT | Severe Thunderstorm Warning | MEG | 16 min |
| Apr 26, 8:22 PM CDT | Areal Flood Advisory | MEG | 3 hr |
| May 6, 11:28 PM CDT | Special Weather Statement | MEG | 62 min |
| May 7, 1:04 AM CDT | Flash Flood Warning | MEG | 3 hr |
| May 14, 12:30 AM CDT | Dense Fog Advisory | MEG | 7 hr |
| May 18, 4:54 PM CDT | Special Weather Statement | MEG | 21 min |
| May 29, 5:27 AM CDT | Severe Thunderstorm Warning | MEG | 33 min |
| May 31, 11:59 AM CDT | Mesoscale Discussion | SPC | 61 min |
| May 31, 12:59 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 31, 2:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 3, 5:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 3, 7:09 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 3, 8:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 3, 9:34 PM CDT | Flash Flood Warning | MEG | 3 hr |
| Jun 3, 10:20 PM CDT | Severe Thunderstorm Warning | MEG | 40 min |
| Jun 3, 10:40 PM CDT | Flash Flood Warning | MEG | 3 hr |
| Jun 3, 10:52 PM CDT | Severe Thunderstorm Warning | MEG | 38 min |
| Jun 4, 9:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 4, 9:43 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 5, 1:49 AM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 11, 1:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 11, 1:28 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 11, 3:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 11, 3:42 PM CDT | Severe Thunderstorm Warning | MEG | 48 min |
| Jun 11, 3:55 PM CDT | Severe Thunderstorm Warning | MEG | 65 min |
| Jun 11, 5:05 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jun 28, 3:28 AM CDT | Heat Advisory | MEG | 4 days |
| Jul 4, 3:35 AM CDT | Heat Advisory | MEG | 4 days |
| Jul 6, 2:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 6, 2:58 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 6, 3:27 PM CDT | Severe Thunderstorm Warning | MEG | 48 min |
| Jul 6, 3:54 PM CDT | Severe Thunderstorm Warning | MEG | 51 min |
| Jul 6, 4:23 PM CDT | Severe Thunderstorm Warning | MEG | 22 min |
| Jul 6, 4:38 PM CDT | Severe Thunderstorm Warning | MEG | 39 min |
| Jul 14, 1:47 PM CDT | Areal Flood Advisory | MEG | 77 min |
| Jul 18, 3:27 AM CDT | Heat Advisory | MEG | 3 days |
| Jul 18, 7:27 PM CDT | Severe Thunderstorm Warning | MEG | 24 min |
| Jul 19, 9:47 PM CDT | Excessive Heat Watch | MEG | 6 hr |
| Jul 20, 4:04 AM CDT | Excessive Heat Warning | MEG | 15 hr |
| Jul 21, 3:04 PM CDT | Heat Advisory | MEG | 5 days |
| Jul 26, 5:27 PM CDT | Mesoscale Discussion | SPC | 33 min |
| Jul 31, 2:28 AM CDT | Heat Advisory | MEG | 61 hr |
| Aug 13, 3:32 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 17, 1:05 AM CDT | Flash Flood Warning | MEG | 3 hr |
| Sep 1, 7:08 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 1, 8:07 PM CDT | Severe Thunderstorm Warning | MEG | 23 min |
| Sep 1, 8:31 PM CDT | Severe Thunderstorm Warning | MEG | 44 min |
| Sep 1, 9:04 PM CDT | Severe Thunderstorm Warning | MEG | 41 min |
| Sep 1, 9:23 PM CDT | Severe Thunderstorm Warning | MEG | 52 min |
| Sep 1, 9:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Sep 2, 2:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Sep 2, 3:42 PM CDT | Tornado Watch | SPC | 7 hr |
| Sep 5, 2:29 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 5, 5:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Sep 5, 6:31 PM CDT | Severe Thunderstorm Warning | MEG | 29 min |
| Sep 5, 6:52 PM CDT | Severe Thunderstorm Warning | MEG | 23 min |
| Sep 5, 7:14 PM CDT | Severe Thunderstorm Warning | MEG | 31 min |
| Sep 7, 8:10 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 7, 8:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Sep 7, 10:53 PM CDT | Special Weather Statement | MEG | 52 min |
| Oct 8, 2:36 PM CDT | Frost Advisory | MEG | 17 hr |
| Oct 10, 3:49 PM CDT | Frost Advisory | MEG | 16 hr |
| Oct 12, 10:31 PM CDT | Dense Fog Advisory | MEG | 10 hr |
| Oct 14, 7:22 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Oct 17, 3:49 AM CDT | Wind Advisory | MEG | 20 hr |
| Oct 17, 8:07 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Oct 17, 8:43 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Oct 17, 9:51 PM CDT | Severe Thunderstorm Warning | MEG | 39 min |
| Oct 17, 10:21 PM CDT | Special Weather Statement | MEG | 39 min |
| Oct 30, 3:30 AM CDT | Red Flag Warning | MEG | 15 hr |
| Oct 30, 3:34 PM CDT | Frost Advisory | MEG | 18 hr |
| Oct 31, 2:53 PM CDT | Freeze Warning | MEG | 18 hr |
| Nov 3, 4:22 PM CDT | Special Weather Statement | MEG | 38 min |
| Nov 3, 4:52 PM CDT | Special Weather Statement | MEG | 38 min |
| Nov 3, 5:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Nov 3, 6:28 PM CDT | Special Weather Statement | MEG | 47 min |
| Nov 7, 3:00 PM CST | Freeze Warning | MEG | 17 hr |
| Nov 22, 3:06 AM CST | Dense Fog Advisory | MEG | 6 hr |
| Nov 28, 1:32 AM CST | Freezing Fog Advisory | MEG | 8 hr |
| Dec 9, 6:20 PM CST | Severe Thunderstorm Warning | MEG | 25 min |
| Dec 9, 10:35 PM CST | Special Weather Statement | MEG | 25 min |
| Dec 17, 1:23 PM CST | Special Weather Statement | MEG | 22 min |
| Dec 17, 1:24 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 19, 3:32 AM CST | Wind Advisory | MEG | 41 hr |
| Dec 20, 4:58 AM CST | Special Weather Statement | MEG | 47 min |
| Dec 25, 4:32 AM CST | Wind Advisory | MEG | 28 hr |
| Dec 28, 4:10 AM CST | Freezing Rain Advisory | MEG | 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 | 34 |
| Severe Thunderstorm Watch | 11 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 37 |
| Special Weather Statement | 11 |
| Flooding | |
| Flash Flood Warning | 6 |
| Areal Flood Advisory | 2 |
| Winter | |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 1 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 2 |
| Frost Advisory | 6 |
| Wind and dust | |
| Wind Advisory | 12 |
| Fire | |
| Red Flag Warning | 3 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
| 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.