Alert archive / Kentucky / Mercer County
Weather alerts in Mercer County, Kentucky, 2017
111 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 111
- Warnings
- 27
- Watches
- 17
- Advisories
- 29
- Busiest month
- April22 alerts
- Busiest day
- March 1, 20178 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 2 tornado warnings covering Mercer County in 2017 had a tornado report inside them.
Mercer County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 16 | 15 | 6% | 5 | 100% | 16 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Louisville, KY: tornado warnings | 32 | 7 | 78% | 38 | 29% | 8 min |
| NWS Louisville, KY: severe thunderstorm warnings | 304 | 142 | 53% | 444 | 72% | 16 min |
| NWS Louisville, KY: flash flood warnings | 31 | 24 | 23% | 66 | 89% | 85 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, 2:37 PM EST | Winter Weather Advisory | LMK | 32 hr |
| Jan 9, 7:54 PM EST | Wind Advisory | LMK | 28 hr |
| Jan 28, 3:11 PM EST | Winter Weather Advisory | LMK | 37 hr |
| Feb 19, 10:23 PM EST | Dense Fog Advisory | LMK | 10 hr |
| Feb 20, 8:43 AM EST | Dense Fog Advisory | LMK | 77 min |
| Feb 24, 6:28 PM EST | Mesoscale Discussion | SPC | 62 min |
| Feb 24, 6:36 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Feb 24, 8:58 PM EST | Special Weather Statement | LMK | 32 min |
| Feb 28, 10:19 AM EST | Special Weather Statement | LMK | 41 min |
| Feb 28, 11:38 AM EST | Flash Flood Watch | LMK | 23 hr |
| Feb 28, 9:29 PM EST | Tornado Watch | SPC | 12 hr |
| Mar 1, 2:32 AM EST | Mesoscale Discussion | SPC | 88 min |
| Mar 1, 5:19 AM EST | Mesoscale Discussion | SPC | 56 min |
| Mar 1, 5:57 AM EST | Tornado Watch | SPC | 5 hr |
| Mar 1, 6:28 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Mar 1, 7:20 AM EST | Severe Thunderstorm Warning | LMK | 40 min |
| Mar 1, 7:50 AM EST | Severe Thunderstorm Warning | LMK | 25 min |
| Mar 1, 7:53 AM EST | Areal Flood Advisory | LMK | 2 hr |
| Mar 7, 3:40 AM EST | Wind Advisory | LMK | 7 hr |
| Mar 9, 2:56 PM EST | Freeze Warning | LMK | 42 hr |
| Mar 11, 3:19 AM EST | Freeze Warning | LMK | 31 hr |
| Mar 13, 3:49 PM EDT | Freeze Warning | LMK | 67 hr |
| Mar 15, 3:29 PM EDT | Freeze Warning | LMK | 39 hr |
| Mar 18, 1:28 AM EDT | Dense Fog Advisory | LMK | 8 hr |
| Mar 22, 10:14 AM EDT | Freeze Warning | LMK | 24 hr |
| Mar 27, 3:24 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Mar 27, 5:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Mar 27, 6:38 PM EDT | Severe Thunderstorm Warning | LMK | 37 min |
| Mar 27, 6:59 PM EDT | Tornado Warning | LMK | 16 min |
| Mar 27, 7:01 PM EDT | Severe Thunderstorm Warning | LMK | 44 min |
| Mar 27, 7:04 PM EDT | Severe Thunderstorm Warning | LMK | 26 min |
| Apr 3, 7:20 AM EDT | Special Weather Statement | LMK | 55 min |
| Apr 5, 2:02 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 5, 2:50 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 5, 4:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 5, 6:55 PM EDT | Severe Thunderstorm Warning | LMK | 35 min |
| Apr 5, 7:20 PM EDT | Severe Thunderstorm Warning | LMK | 25 min |
| Apr 5, 7:32 PM EDT | Tornado Warning | LMK | 28 min |
| Apr 5, 7:54 PM EDT | Wind Advisory | LMK | 3 hr |
| Apr 5, 7:57 PM EDT | Mesoscale Discussion | SPC | 48 min |
| Apr 6, 3:31 AM EDT | Wind Advisory | LMK | 18 hr |
| Apr 7, 3:40 AM EDT | Frost Advisory | LMK | 29 hr |
| Apr 7, 2:33 PM EDT | Freeze Warning | LMK | 18 hr |
| Apr 10, 8:48 AM EDT | Red Flag Warning | LMK | 11 hr |
| Apr 16, 3:02 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 28, 3:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Apr 29, 7:23 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 29, 6:07 PM EDT | Severe Thunderstorm Warning | LMK | 23 min |
| Apr 29, 6:29 PM EDT | Severe Thunderstorm Warning | LMK | 31 min |
| Apr 30, 3:06 PM EDT | Wind Advisory | LMK | 32 hr |
| Apr 30, 6:41 PM EDT | Severe Thunderstorm Warning | LMK | 34 min |
| Apr 30, 7:11 PM EDT | Severe Thunderstorm Warning | LMK | 34 min |
| Apr 30, 7:51 PM EDT | Special Weather Statement | LMK | 24 min |
| May 1, 3:17 PM EDT | Wind Advisory | LMK | 29 hr |
| May 11, 1:58 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 11, 3:37 PM EDT | Special Weather Statement | LMK | 38 min |
| May 20, 4:23 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 24, 1:19 PM EDT | Tornado Watch | SPC | 7 hr |
| May 24, 3:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 27, 4:02 AM EDT | Flash Flood Watch | LMK | 23 hr |
| May 27, 1:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 27, 2:36 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 27, 4:00 PM EDT | Special Weather Statement | LMK | 30 min |
| May 27, 4:50 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jun 13, 6:47 PM EDT | Special Weather Statement | LMK | 28 min |
| Jun 15, 9:05 PM EDT | Dense Fog Advisory | LMK | 12 hr |
| Jun 18, 3:29 PM EDT | Flash Flood Watch | LMK | 12 hr |
| Jun 18, 4:43 PM EDT | Severe Thunderstorm Warning | LMK | 32 min |
| Jun 22, 1:18 PM EDT | Flash Flood Watch | LMK | 36 hr |
| Jun 23, 1:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 3:32 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 23, 5:46 PM EDT | Areal Flood Advisory | LMK | 3 hr |
| Jun 23, 5:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jun 23, 6:30 PM EDT | Severe Thunderstorm Warning | LMK | 30 min |
| Jun 23, 6:36 PM EDT | Flash Flood Warning | LMK | 3 hr |
| Jun 23, 6:58 PM EDT | Severe Thunderstorm Warning | LMK | 32 min |
| Jun 24, 4:42 AM EDT | Dense Fog Advisory | LMK | 4 hr |
| Jun 30, 10:54 PM EDT | Severe Thunderstorm Warning | LMK | 36 min |
| Jul 6, 1:26 PM EDT | Special Weather Statement | LMK | 109 min |
| Jul 7, 5:30 AM EDT | Dense Fog Advisory | LMK | 4 hr |
| Jul 7, 3:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 7, 9:44 PM EDT | Special Weather Statement | LMK | 46 min |
| Jul 7, 10:29 PM EDT | Special Weather Statement | LMK | 46 min |
| Jul 20, 9:49 AM EDT | Heat Advisory | LMK | 3 days |
| Jul 23, 2:50 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 24, 4:57 PM EDT | Special Weather Statement | LMK | 33 min |
| Jul 27, 8:22 PM EDT | Special Weather Statement | LMK | 53 min |
| Jul 28, 1:22 PM EDT | Special Weather Statement | LMK | 68 min |
| Aug 8, 6:13 AM EDT | Dense Fog Advisory | LMK | 3 hr |
| Aug 18, 12:22 AM EDT | Special Weather Statement | LMK | 53 min |
| Aug 18, 1:30 AM EDT | Areal Flood Advisory | LMK | 2 hr |
| Aug 22, 11:54 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 22, 12:39 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 22, 2:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Aug 22, 4:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 30, 3:48 PM EDT | Flash Flood Watch | LMK | 58 hr |
| Sep 1, 10:24 AM EDT | Wind Advisory | LMK | 7 hr |
| Sep 5, 8:13 AM EDT | Special Weather Statement | LMK | 92 min |
| Sep 15, 1:38 AM EDT | Dense Fog Advisory | LMK | 9 hr |
| Sep 20, 3:21 AM EDT | Dense Fog Advisory | LMK | 4 hr |
| Oct 8, 4:17 AM EDT | Areal Flood Advisory | LMK | 4 hr |
| Oct 13, 6:38 AM EDT | Dense Fog Advisory | LMK | 2 hr |
| Oct 25, 3:55 AM EDT | Frost Advisory | LMK | 29 hr |
| Oct 29, 2:59 PM EDT | Freeze Warning | LMK | 17 hr |
| Nov 4, 6:33 AM EDT | Dense Fog Advisory | LMK | 3 hr |
| Nov 17, 10:30 AM EST | Wind Advisory | LMK | 39 hr |
| Nov 18, 12:04 PM EST | Severe Thunderstorm Watch | SPC | 8 hr |
| Nov 18, 5:44 PM EST | Mesoscale Discussion | SPC | 61 min |
| Nov 18, 6:10 PM EST | Severe Thunderstorm Warning | LMK | 20 min |
| Nov 30, 10:49 PM EST | Dense Fog Advisory | LMK | 11 hr |
| Dec 21, 3:10 PM EST | Flash Flood Watch | LMK | 43 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 | 16 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 23 |
| Special Weather Statement | 15 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 6 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 7 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 12 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.