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

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings20100%0
Severe thunderstorm warnings16156%5100%16 min
Flash flood warnings110%0

Each office's whole area, 2017

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Louisville, KY: tornado warnings32778%3829%8 min
NWS Louisville, KY: severe thunderstorm warnings30414253%44472%16 min
NWS Louisville, KY: flash flood warnings312423%6689%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.

IssuedProductOfficeLasted
Jan 4, 2:37 PM ESTWinter Weather AdvisoryLMK32 hr
Jan 9, 7:54 PM ESTWind AdvisoryLMK28 hr
Jan 28, 3:11 PM ESTWinter Weather AdvisoryLMK37 hr
Feb 19, 10:23 PM ESTDense Fog AdvisoryLMK10 hr
Feb 20, 8:43 AM ESTDense Fog AdvisoryLMK77 min
Feb 24, 6:28 PM ESTMesoscale DiscussionSPC62 min
Feb 24, 6:36 PM ESTSevere Thunderstorm WatchSPC6 hr
Feb 24, 8:58 PM ESTSpecial Weather StatementLMK32 min
Feb 28, 10:19 AM ESTSpecial Weather StatementLMK41 min
Feb 28, 11:38 AM ESTFlash Flood WatchLMK23 hr
Feb 28, 9:29 PM ESTTornado WatchSPC12 hr
Mar 1, 2:32 AM ESTMesoscale DiscussionSPC88 min
Mar 1, 5:19 AM ESTMesoscale DiscussionSPC56 min
Mar 1, 5:57 AM ESTTornado WatchSPC5 hr
Mar 1, 6:28 AM ESTMesoscale DiscussionSPC2 hr
Mar 1, 7:20 AM ESTSevere Thunderstorm WarningLMK40 min
Mar 1, 7:50 AM ESTSevere Thunderstorm WarningLMK25 min
Mar 1, 7:53 AM ESTAreal Flood AdvisoryLMK2 hr
Mar 7, 3:40 AM ESTWind AdvisoryLMK7 hr
Mar 9, 2:56 PM ESTFreeze WarningLMK42 hr
Mar 11, 3:19 AM ESTFreeze WarningLMK31 hr
Mar 13, 3:49 PM EDTFreeze WarningLMK67 hr
Mar 15, 3:29 PM EDTFreeze WarningLMK39 hr
Mar 18, 1:28 AM EDTDense Fog AdvisoryLMK8 hr
Mar 22, 10:14 AM EDTFreeze WarningLMK24 hr
Mar 27, 3:24 PM EDTSevere Thunderstorm WatchSPC8 hr
Mar 27, 5:43 PM EDTMesoscale DiscussionSPC92 min
Mar 27, 6:38 PM EDTSevere Thunderstorm WarningLMK37 min
Mar 27, 6:59 PM EDTTornado WarningLMK16 min
Mar 27, 7:01 PM EDTSevere Thunderstorm WarningLMK44 min
Mar 27, 7:04 PM EDTSevere Thunderstorm WarningLMK26 min
Apr 3, 7:20 AM EDTSpecial Weather StatementLMK55 min
Apr 5, 2:02 PM EDTMesoscale DiscussionSPC2 hr
Apr 5, 2:50 PM EDTTornado WatchSPC8 hr
Apr 5, 4:51 PM EDTMesoscale DiscussionSPC84 min
Apr 5, 6:55 PM EDTSevere Thunderstorm WarningLMK35 min
Apr 5, 7:20 PM EDTSevere Thunderstorm WarningLMK25 min
Apr 5, 7:32 PM EDTTornado WarningLMK28 min
Apr 5, 7:54 PM EDTWind AdvisoryLMK3 hr
Apr 5, 7:57 PM EDTMesoscale DiscussionSPC48 min
Apr 6, 3:31 AM EDTWind AdvisoryLMK18 hr
Apr 7, 3:40 AM EDTFrost AdvisoryLMK29 hr
Apr 7, 2:33 PM EDTFreeze WarningLMK18 hr
Apr 10, 8:48 AM EDTRed Flag WarningLMK11 hr
Apr 16, 3:02 PM EDTMesoscale DiscussionSPC2 hr
Apr 28, 3:33 PM EDTMesoscale DiscussionSPC87 min
Apr 29, 7:23 AM EDTMesoscale DiscussionSPC3 hr
Apr 29, 6:07 PM EDTSevere Thunderstorm WarningLMK23 min
Apr 29, 6:29 PM EDTSevere Thunderstorm WarningLMK31 min
Apr 30, 3:06 PM EDTWind AdvisoryLMK32 hr
Apr 30, 6:41 PM EDTSevere Thunderstorm WarningLMK34 min
Apr 30, 7:11 PM EDTSevere Thunderstorm WarningLMK34 min
Apr 30, 7:51 PM EDTSpecial Weather StatementLMK24 min
May 1, 3:17 PM EDTWind AdvisoryLMK29 hr
May 11, 1:58 PM EDTMesoscale DiscussionSPC3 hr
May 11, 3:37 PM EDTSpecial Weather StatementLMK38 min
May 20, 4:23 PM EDTSevere Thunderstorm WatchSPC7 hr
May 24, 1:19 PM EDTTornado WatchSPC7 hr
May 24, 3:50 PM EDTMesoscale DiscussionSPC55 min
May 27, 4:02 AM EDTFlash Flood WatchLMK23 hr
May 27, 1:50 PM EDTMesoscale DiscussionSPC85 min
May 27, 2:36 PM EDTSevere Thunderstorm WatchSPC7 hr
May 27, 4:00 PM EDTSpecial Weather StatementLMK30 min
May 27, 4:50 PM EDTMesoscale DiscussionSPC85 min
Jun 13, 6:47 PM EDTSpecial Weather StatementLMK28 min
Jun 15, 9:05 PM EDTDense Fog AdvisoryLMK12 hr
Jun 18, 3:29 PM EDTFlash Flood WatchLMK12 hr
Jun 18, 4:43 PM EDTSevere Thunderstorm WarningLMK32 min
Jun 22, 1:18 PM EDTFlash Flood WatchLMK36 hr
Jun 23, 1:39 PM EDTMesoscale DiscussionSPC2 hr
Jun 23, 3:32 PM EDTTornado WatchSPC6 hr
Jun 23, 5:46 PM EDTAreal Flood AdvisoryLMK3 hr
Jun 23, 5:50 PM EDTMesoscale DiscussionSPC115 min
Jun 23, 6:30 PM EDTSevere Thunderstorm WarningLMK30 min
Jun 23, 6:36 PM EDTFlash Flood WarningLMK3 hr
Jun 23, 6:58 PM EDTSevere Thunderstorm WarningLMK32 min
Jun 24, 4:42 AM EDTDense Fog AdvisoryLMK4 hr
Jun 30, 10:54 PM EDTSevere Thunderstorm WarningLMK36 min
Jul 6, 1:26 PM EDTSpecial Weather StatementLMK109 min
Jul 7, 5:30 AM EDTDense Fog AdvisoryLMK4 hr
Jul 7, 3:54 PM EDTMesoscale DiscussionSPC96 min
Jul 7, 9:44 PM EDTSpecial Weather StatementLMK46 min
Jul 7, 10:29 PM EDTSpecial Weather StatementLMK46 min
Jul 20, 9:49 AM EDTHeat AdvisoryLMK3 days
Jul 23, 2:50 AM EDTMesoscale DiscussionSPC3 hr
Jul 24, 4:57 PM EDTSpecial Weather StatementLMK33 min
Jul 27, 8:22 PM EDTSpecial Weather StatementLMK53 min
Jul 28, 1:22 PM EDTSpecial Weather StatementLMK68 min
Aug 8, 6:13 AM EDTDense Fog AdvisoryLMK3 hr
Aug 18, 12:22 AM EDTSpecial Weather StatementLMK53 min
Aug 18, 1:30 AM EDTAreal Flood AdvisoryLMK2 hr
Aug 22, 11:54 AM EDTMesoscale DiscussionSPC66 min
Aug 22, 12:39 PM EDTSevere Thunderstorm WatchSPC8 hr
Aug 22, 2:44 PM EDTMesoscale DiscussionSPC91 min
Aug 22, 4:39 PM EDTMesoscale DiscussionSPC66 min
Aug 30, 3:48 PM EDTFlash Flood WatchLMK58 hr
Sep 1, 10:24 AM EDTWind AdvisoryLMK7 hr
Sep 5, 8:13 AM EDTSpecial Weather StatementLMK92 min
Sep 15, 1:38 AM EDTDense Fog AdvisoryLMK9 hr
Sep 20, 3:21 AM EDTDense Fog AdvisoryLMK4 hr
Oct 8, 4:17 AM EDTAreal Flood AdvisoryLMK4 hr
Oct 13, 6:38 AM EDTDense Fog AdvisoryLMK2 hr
Oct 25, 3:55 AM EDTFrost AdvisoryLMK29 hr
Oct 29, 2:59 PM EDTFreeze WarningLMK17 hr
Nov 4, 6:33 AM EDTDense Fog AdvisoryLMK3 hr
Nov 17, 10:30 AM ESTWind AdvisoryLMK39 hr
Nov 18, 12:04 PM ESTSevere Thunderstorm WatchSPC8 hr
Nov 18, 5:44 PM ESTMesoscale DiscussionSPC61 min
Nov 18, 6:10 PM ESTSevere Thunderstorm WarningLMK20 min
Nov 30, 10:49 PM ESTDense Fog AdvisoryLMK11 hr
Dec 21, 3:10 PM ESTFlash Flood WatchLMK43 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

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.