Alert archive / Kentucky / Mason County
Weather alerts in Mason County, Kentucky, 2020
97 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mason County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 97
- Warnings
- 19
- Watches
- 16
- Advisories
- 26
- Busiest month
- May21 alerts
- Busiest day
- April 8, 20206 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 1 tornado warnings covering Mason County in 2020 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 22 minutes after it went out.
Mason County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 1 | 100% | 22 min |
| Severe thunderstorm warnings | 7 | 4 | 43% | 12 | 83% | 23 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wilmington, OH: tornado warnings | 24 | 12 | 50% | 32 | 56% | 10 min |
| NWS Wilmington, OH: severe thunderstorm warnings | 236 | 157 | 33% | 673 | 77% | 19 min |
| NWS Wilmington, OH: flash flood warnings | 38 | 25 | 34% | 85 | 79% | 129 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 10, 3:08 PM EST | Wind Advisory | ILN | 30 hr |
| Jan 11, 9:36 AM EST | Severe Thunderstorm Watch | SPC | 7 hr |
| Jan 11, 12:35 PM EST | Mesoscale Discussion | SPC | 85 min |
| Jan 11, 1:10 PM EST | Special Weather Statement | ILN | 35 min |
| Jan 11, 2:01 PM EST | Severe Thunderstorm Warning | ILN | 44 min |
| Jan 11, 3:57 PM EST | High Wind Warning | ILN | 12 hr |
| Jan 15, 12:17 AM EST | Dense Fog Advisory | ILN | 13 hr |
| Jan 18, 3:54 AM EST | Wind Advisory | ILN | 11 hr |
| Feb 6, 1:52 PM EST | Winter Weather Advisory | ILN | 20 hr |
| Feb 9, 1:58 PM EST | Special Weather Statement | ILN | 62 min |
| Feb 11, 11:47 AM EST | Flash Flood Watch | ILN | 43 hr |
| Feb 13, 10:45 AM EST | River Flood Warning | ILN | 3 days |
| Mar 12, 10:41 AM EDT | Flash Flood Watch | ILN | 15 hr |
| Mar 28, 3:29 PM EDT | Wind Advisory | ILN | 29 hr |
| Mar 28, 11:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Apr 8, 12:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Apr 8, 12:44 PM EDT | Special Weather Statement | ILN | 31 min |
| Apr 8, 1:10 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 8, 1:18 PM EDT | Special Weather Statement | ILN | 27 min |
| Apr 8, 6:52 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 8, 7:24 PM EDT | Tornado Watch | SPC | 5 hr |
| Apr 8, 8:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Apr 8, 11:03 PM EDT | Tornado Warning | ILN | 31 min |
| Apr 8, 11:06 PM EDT | Severe Thunderstorm Warning | ILN | 54 min |
| Apr 9, 3:49 PM EDT | Freeze Watch | ILN | 12 hr |
| Apr 10, 3:31 AM EDT | Freeze Warning | ILN | 29 hr |
| Apr 11, 3:32 PM EDT | High Wind Watch | ILN | 24 hr |
| Apr 12, 3:17 PM EDT | Wind Advisory | ILN | 27 hr |
| Apr 14, 3:05 AM EDT | Freeze Warning | ILN | 30 hr |
| Apr 15, 3:56 AM EDT | Freeze Warning | ILN | 29 hr |
| Apr 18, 10:05 PM EDT | Frost Advisory | ILN | 11 hr |
| Apr 21, 3:46 AM EDT | Frost Advisory | ILN | 30 hr |
| May 3, 6:35 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 6, 3:17 PM EDT | Frost Advisory | ILN | 18 hr |
| May 7, 3:39 AM EDT | Freeze Warning | ILN | 53 hr |
| May 10, 12:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 4:03 PM EDT | Special Weather Statement | ILN | 42 min |
| May 10, 4:34 PM EDT | Special Weather Statement | ILN | 41 min |
| May 10, 6:36 PM EDT | Mesoscale Discussion | SPC | 24 min |
| May 11, 3:14 AM EDT | Frost Advisory | ILN | 29 hr |
| May 16, 8:46 PM EDT | Special Weather Statement | ILN | 44 min |
| May 17, 3:20 PM EDT | Flash Flood Watch | ILN | 4 days |
| May 18, 1:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 18, 2:18 PM EDT | Tornado Watch | SPC | 7 hr |
| May 18, 3:57 PM EDT | Severe Thunderstorm Warning | ILN | 48 min |
| May 18, 4:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| May 18, 7:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| May 18, 7:31 PM EDT | Areal Flood Advisory | ILN | 4 hr |
| May 18, 8:10 PM EDT | Areal Flood Advisory | ILN | 3 hr |
| May 18, 9:18 PM EDT | Areal Flood Advisory | ILN | 4 hr |
| May 19, 6:20 AM EDT | Areal Flood Advisory | ILN | 4 hr |
| May 19, 10:15 AM EDT | Areal Flood Advisory | ILN | 10 hr |
| May 23, 4:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 4, 11:11 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 1:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 10, 2:48 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 10, 5:25 PM EDT | Severe Thunderstorm Warning | ILN | 50 min |
| Jun 10, 6:09 PM EDT | Severe Thunderstorm Warning | ILN | 66 min |
| Jun 21, 1:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 12:45 AM EDT | Areal Flood Advisory | ILN | 3 hr |
| Jun 30, 12:02 PM EDT | Areal Flood Advisory | ILN | 118 min |
| Jun 30, 3:06 PM EDT | Flash Flood Watch | ILN | 5 hr |
| Jul 8, 3:29 PM EDT | Heat Advisory | ILN | 29 hr |
| Jul 10, 12:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 10, 12:34 PM EDT | Special Weather Statement | ILN | 26 min |
| Jul 10, 1:03 PM EDT | Special Weather Statement | ILN | 27 min |
| Jul 11, 8:04 PM EDT | Special Weather Statement | ILN | 26 min |
| Jul 18, 3:25 PM EDT | Heat Advisory | ILN | 29 hr |
| Jul 20, 5:26 PM EDT | Severe Thunderstorm Warning | ILN | 20 min |
| Jul 27, 7:06 PM EDT | Special Weather Statement | ILN | 39 min |
| Jul 30, 11:15 AM EDT | Flash Flood Watch | ILN | 16 hr |
| Aug 1, 2:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Aug 3, 8:32 PM EDT | Areal Flood Advisory | ILN | 88 min |
| Aug 3, 8:36 PM EDT | Special Weather Statement | ILN | 39 min |
| Aug 3, 8:43 PM EDT | Flash Flood Warning | ILN | 2 hr |
| Aug 10, 11:37 PM EDT | Special Weather Statement | ILN | 23 min |
| Aug 11, 12:00 AM EDT | Special Weather Statement | ILN | 30 min |
| Aug 14, 10:57 AM EDT | Flash Flood Watch | ILN | 24 hr |
| Aug 16, 2:14 PM EDT | Special Weather Statement | ILN | 31 min |
| Aug 16, 2:44 PM EDT | Special Weather Statement | ILN | 31 min |
| Aug 18, 3:38 PM EDT | Severe Thunderstorm Warning | ILN | 52 min |
| Aug 22, 12:46 PM EDT | Special Weather Statement | ILN | 59 min |
| Sep 1, 5:05 AM EDT | Dense Fog Advisory | ILN | 5 hr |
| Sep 2, 3:13 PM EDT | Flash Flood Watch | ILN | 21 hr |
| Sep 17, 3:53 AM EDT | Dense Fog Advisory | ILN | 6 hr |
| Oct 16, 3:58 AM EDT | Freeze Watch | ILN | 10 hr |
| Oct 16, 1:38 PM EDT | Freeze Warning | ILN | 19 hr |
| Oct 23, 2:30 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 23, 5:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 30, 3:21 AM EDT | Freeze Warning | ILN | 31 hr |
| Oct 31, 12:12 PM EDT | Freeze Watch | ILN | 16 hr |
| Nov 1, 3:10 AM EST | Freeze Warning | ILN | 31 hr |
| Nov 14, 3:09 AM EST | Wind Advisory | ILN | 40 hr |
| Nov 19, 10:05 AM EST | Red Flag Warning | ILN | 9 hr |
| Nov 29, 3:30 PM EST | Winter Weather Advisory | ILN | 43 hr |
| Dec 16, 2:33 AM EST | Winter Weather Advisory | ILN | 22 hr |
| Dec 23, 2:11 PM EST | Winter Weather Advisory | ILN | 41 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 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 17 |
| Flooding | |
| Flash Flood Warning | 1 |
| River Flood Warning | 1 |
| Flash Flood Watch | 7 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Weather Advisory | 4 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 3 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.