Alert archive / Ohio / Mercer County
Weather alerts in Mercer County, Ohio, 2022
104 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mercer County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 104
- Warnings
- 16
- Watches
- 19
- Advisories
- 29
- Busiest month
- July18 alerts
- Busiest day
- June 12, 20225 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Mercer County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 5 | 29% | 7 | 71% | 24 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wilmington, OH: tornado warnings | 26 | 6 | 77% | 22 | 45% | 7 min |
| NWS Wilmington, OH: severe thunderstorm warnings | 210 | 140 | 33% | 518 | 70% | 24 min |
| NWS Wilmington, OH: flash flood warnings | 25 | 13 | 48% | 35 | 77% | 84 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 4, 3:27 PM EST | Wind Advisory | ILN | 24 hr |
| Jan 8, 5:36 PM EST | Winter Weather Advisory | ILN | 6 hr |
| Jan 22, 2:44 PM EST | Winter Weather Advisory | ILN | 24 hr |
| Jan 25, 3:21 AM EST | Wind Chill Advisory | ILN | 32 hr |
| Jan 26, 9:38 PM EST | Wind Chill Advisory | ILN | 11 hr |
| Jan 31, 3:04 PM EST | Winter Storm Watch | ILN | 42 hr |
| Feb 1, 10:11 AM EST | Winter Storm Warning | ILN | 64 hr |
| Feb 4, 2:32 AM EST | Winter Weather Advisory | ILN | 11 hr |
| Feb 15, 1:49 PM EST | Wind Advisory | ILN | 29 hr |
| Feb 16, 9:21 AM EST | Flood Watch | ILN | 35 hr |
| Feb 17, 4:11 AM EST | Winter Weather Advisory | ILN | 21 hr |
| Feb 24, 3:56 AM EST | Winter Weather Advisory | ILN | 24 hr |
| Feb 24, 6:24 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 5, 2:52 PM EST | Wind Advisory | ILN | 22 hr |
| Mar 6, 3:11 AM EST | Special Weather Statement | ILN | 64 min |
| Mar 6, 3:11 AM EST | Mesoscale Discussion | SPC | 94 min |
| Mar 6, 3:25 AM EST | Severe Thunderstorm Warning | ILN | 80 min |
| Mar 6, 3:27 AM EST | Severe Thunderstorm Watch | SPC | 3 hr |
| Mar 23, 12:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 23, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 23, 4:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 29, 2:23 PM EDT | Wind Advisory | ILN | 41 hr |
| Mar 30, 11:06 PM EDT | High Wind Warning | ILN | 5 hr |
| Apr 12, 5:12 AM EDT | Dense Fog Advisory | ILN | 5 hr |
| Apr 14, 3:41 AM EDT | Wind Advisory | ILN | 16 hr |
| Apr 15, 3:06 AM EDT | Wind Advisory | ILN | 17 hr |
| Apr 26, 3:48 AM EDT | Frost Advisory | ILN | 29 hr |
| Apr 26, 2:47 PM EDT | Freeze Warning | ILN | 18 hr |
| Apr 27, 3:55 AM EDT | Frost Advisory | ILN | 24 hr |
| May 3, 4:25 PM EDT | Special Weather Statement | ILN | 35 min |
| May 3, 4:49 PM EDT | Special Weather Statement | ILN | 26 min |
| May 14, 2:07 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 14, 5:45 PM EDT | Special Weather Statement | ILN | 30 min |
| May 21, 8:46 AM EDT | Special Weather Statement | ILN | 59 min |
| May 21, 1:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 21, 1:51 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 21, 4:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 25, 4:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 25, 9:02 PM EDT | Special Weather Statement | ILN | 28 min |
| Jun 6, 3:35 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 8, 4:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 8, 5:20 PM EDT | Special Weather Statement | ILN | 25 min |
| Jun 8, 7:02 PM EDT | Severe Thunderstorm Warning | ILN | 43 min |
| Jun 12, 4:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 4:36 PM EDT | Special Weather Statement | ILN | 24 min |
| Jun 12, 4:46 PM EDT | Severe Thunderstorm Warning | ILN | 44 min |
| Jun 12, 5:27 PM EDT | Special Weather Statement | ILN | 18 min |
| Jun 12, 5:46 PM EDT | Special Weather Statement | ILN | 29 min |
| Jun 13, 3:21 AM EDT | Excessive Heat Watch | ILN | 12 hr |
| Jun 13, 2:20 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 13, 3:41 PM EDT | Excessive Heat Warning | ILN | 52 hr |
| Jun 13, 10:02 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 13, 10:47 PM EDT | Severe Thunderstorm Warning | ILN | 58 min |
| Jun 13, 11:42 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 3:40 AM EDT | Excessive Heat Watch | ILN | 12 hr |
| Jun 15, 3:29 PM EDT | Heat Advisory | ILN | 29 hr |
| Jul 4, 3:33 PM EDT | Heat Advisory | ILN | 29 hr |
| Jul 5, 5:03 AM EDT | Special Weather Statement | ILN | 42 min |
| Jul 5, 9:40 AM EDT | Areal Flood Advisory | ILN | 3 hr |
| Jul 5, 10:57 AM EDT | Special Weather Statement | ILN | 48 min |
| Jul 5, 7:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 5, 9:27 PM EDT | Special Weather Statement | ILN | 33 min |
| Jul 5, 9:38 PM EDT | Severe Thunderstorm Warning | ILN | 39 min |
| Jul 6, 12:42 AM EDT | Flood Watch | ILN | 15 hr |
| Jul 6, 12:58 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 13, 1:26 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 9:52 AM EDT | Flood Watch | ILN | 26 hr |
| Jul 20, 12:52 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 23, 7:10 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 23, 8:28 AM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 23, 9:05 AM EDT | Special Weather Statement | ILN | 55 min |
| Jul 23, 9:18 AM EDT | Severe Thunderstorm Warning | ILN | 57 min |
| Jul 23, 9:59 AM EDT | Severe Thunderstorm Warning | ILN | 50 min |
| Jul 24, 4:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 3:11 PM EDT | Heat Advisory | ILN | 29 hr |
| Aug 3, 6:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 20, 1:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 20, 1:48 PM EDT | Special Weather Statement | ILN | 42 min |
| Aug 20, 2:24 PM EDT | Special Weather Statement | ILN | 51 min |
| Aug 29, 5:22 PM EDT | Special Weather Statement | ILN | 23 min |
| Aug 29, 5:39 PM EDT | Special Weather Statement | ILN | 36 min |
| Aug 29, 6:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 4, 3:18 AM EDT | Flood Watch | ILN | 44 hr |
| Sep 14, 4:20 AM EDT | Dense Fog Advisory | ILN | 5 hr |
| Oct 7, 3:24 AM EDT | Freeze Watch | ILN | 12 hr |
| Oct 7, 3:15 PM EDT | Freeze Warning | ILN | 18 hr |
| Oct 8, 2:55 PM EDT | Frost Advisory | ILN | 18 hr |
| Oct 14, 3:39 AM EDT | Red Flag Warning | ILN | 16 hr |
| Oct 16, 3:37 AM EDT | Freeze Watch | ILN | 36 hr |
| Oct 19, 3:34 AM EDT | Freeze Watch | ILN | 10 hr |
| Oct 19, 1:37 PM EDT | Freeze Warning | ILN | 20 hr |
| Nov 2, 10:27 PM EDT | Dense Fog Advisory | ILN | 13 hr |
| Nov 4, 2:58 PM EDT | Wind Advisory | ILN | 29 hr |
| Nov 12, 9:10 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Dec 2, 2:30 PM EST | Wind Advisory | ILN | 19 hr |
| Dec 7, 4:30 AM EST | Dense Fog Advisory | ILN | 6 hr |
| Dec 17, 9:45 PM EST | Winter Weather Advisory | ILN | 5 hr |
| Dec 20, 3:11 PM EST | Winter Storm Watch | ILN | 21 hr |
| Dec 21, 12:12 PM EST | Wind Chill Watch | ILN | 15 hr |
| Dec 21, 12:12 PM EST | Winter Storm Warning | ILN | 67 hr |
| Dec 22, 3:15 AM EST | Wind Chill Warning | ILN | 52 hr |
| Dec 22, 4:39 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 23, 3:56 AM EST | Wind Chill Advisory | ILN | 56 hr |
| Dec 24, 6:50 AM EST | Winter Weather Advisory | ILN | 6 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 | 7 |
| Severe Thunderstorm Watch | 7 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 18 |
| Flooding | |
| Flood Watch | 4 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 7 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 2 |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Freeze Watch | 3 |
| Wind Chill Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 1 |
| 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 archive20212023
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.