Alert archive / Kentucky / Knox County

Weather alerts in Knox County, Kentucky, 2020

129 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Knox County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts
129
Warnings
29
Watches
16
Advisories
58
Busiest month
May30 alerts
Busiest day
February 6, 202011 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 warnings covering Knox County in 2020 had a tornado report inside them.

Knox County, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings5420%560%20 min
Flash flood warnings4325%1100%0 min

Each office's whole area, 2020

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Jackson, KY: tornado warnings50100%10%
NWS Jackson, KY: severe thunderstorm warnings915144%15572%17 min
NWS Jackson, KY: flash flood warnings371949%5474%47 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 10, 3:36 PM ESTWind AdvisoryJKL29 hr
Jan 11, 12:35 PM ESTMesoscale DiscussionSPC85 min
Jan 11, 8:38 PM ESTHigh Wind WarningJKL4 hr
Feb 4, 4:07 PM ESTFlood WatchJKL45 hr
Feb 5, 7:16 PM ESTAreal Flood AdvisoryJKL3 hr
Feb 5, 8:38 PM ESTAreal Flood AdvisoryJKL3 hr
Feb 5, 9:19 PM ESTFlash Flood WarningJKL3 hr
Feb 5, 9:45 PM ESTRiver Flood WarningJKL4 days
Feb 5, 9:46 PM ESTAreal Flood AdvisoryJKL3 hr
Feb 5, 10:53 PM ESTAreal Flood AdvisoryJKL3 hr
Feb 5, 11:58 PM ESTAreal Flood WarningJKL15 hr
Feb 6, 7:24 AM ESTAreal Flood WarningJKL6 hr
Feb 6, 1:11 PM ESTAreal Flood WarningJKL6 hr
Feb 6, 2:50 PM ESTAreal Flood WarningJKL6 hr
Feb 6, 3:14 PM ESTWinter Weather AdvisoryJKL22 hr
Feb 9, 11:57 AM ESTRiver Flood AdvisoryJKL16 hr
Feb 10, 4:00 AM ESTFlood WatchJKL30 hr
Feb 11, 11:37 AM ESTFlash Flood WatchJKL43 hr
Feb 11, 4:09 PM ESTRiver Flood AdvisoryJKL55 hr
Feb 12, 8:49 PM ESTAreal Flood AdvisoryJKL10 hr
Feb 12, 9:03 PM ESTSpecial Weather StatementJKL42 min
Feb 13, 1:01 AM ESTAreal Flood AdvisoryJKL6 hr
Feb 13, 10:54 PM ESTRiver Flood WarningJKL8 hr
Feb 14, 6:49 AM ESTRiver Flood AdvisoryJKL24 hr
Feb 27, 3:39 PM ESTWinter Weather AdvisoryJKL39 hr
Mar 12, 11:01 PM EDTAreal Flood AdvisoryJKL3 hr
Mar 20, 11:30 PM EDTRiver Flood AdvisoryJKL42 hr
Mar 24, 9:56 PM EDTAreal Flood AdvisoryJKL4 hr
Mar 25, 6:55 AM EDTRiver Flood AdvisoryJKL37 hr
Mar 29, 4:36 AM EDTSpecial Weather StatementJKL39 min
Apr 8, 10:14 PM EDTMesoscale DiscussionSPC3 hr
Apr 8, 10:51 PM EDTTornado WatchSPC5 hr
Apr 9, 4:15 PM EDTFreeze WatchJKL12 hr
Apr 10, 4:05 AM EDTFreeze WarningJKL30 hr
Apr 12, 3:55 AM EDTWind AdvisoryJKL34 hr
Apr 12, 8:44 PM EDTAreal Flood AdvisoryJKL3 hr
Apr 12, 11:49 PM EDTAreal Flood AdvisoryJKL5 hr
Apr 13, 1:13 AM EDTAreal Flood WarningJKL6 hr
Apr 13, 3:53 AM EDTRiver Flood AdvisoryJKL55 hr
Apr 13, 4:27 PM EDTRiver Flood WarningJKL28 hr
Apr 14, 4:08 AM EDTFreeze WarningJKL30 hr
Apr 14, 8:41 PM EDTRiver Flood AdvisoryJKL14 hr
Apr 15, 10:25 AM EDTFrost AdvisoryJKL23 hr
Apr 18, 3:35 PM EDTFrost AdvisoryJKL17 hr
Apr 21, 4:00 AM EDTFrost AdvisoryJKL30 hr
Apr 25, 5:48 PM EDTSpecial Weather StatementJKL42 min
Apr 25, 6:01 PM EDTSevere Thunderstorm WarningJKL29 min
Apr 25, 6:19 PM EDTTornado WarningJKL26 min
Apr 25, 6:31 PM EDTAreal Flood AdvisoryJKL3 hr
Apr 25, 6:35 PM EDTSpecial Weather StatementJKL25 min
Apr 27, 3:23 AM EDTDense Fog AdvisoryJKL7 hr
Apr 29, 7:16 AM EDTWind AdvisoryJKL7 hr
May 3, 4:08 PM EDTMesoscale DiscussionSPC67 min
May 3, 6:35 PM EDTMesoscale DiscussionSPC55 min
May 3, 6:52 PM EDTSevere Thunderstorm WatchSPC3 hr
May 5, 9:38 AM EDTFlash Flood WarningJKL3 hr
May 5, 12:31 PM EDTAreal Flood WarningJKL7 hr
May 6, 4:02 AM EDTRiver Flood AdvisoryJKL12 hr
May 6, 4:04 PM EDTFrost AdvisoryJKL17 hr
May 7, 3:55 AM EDTFreeze WarningJKL54 hr
May 8, 4:29 PM EDTFreeze WatchJKL12 hr
May 9, 4:12 AM EDTFreeze WarningJKL29 hr
May 11, 3:25 AM EDTFrost AdvisoryJKL30 hr
May 17, 3:45 PM EDTFlash Flood WatchJKL4 days
May 18, 2:18 PM EDTTornado WatchSPC7 hr
May 18, 4:32 PM EDTMesoscale DiscussionSPC88 min
May 18, 7:20 PM EDTMesoscale DiscussionSPC115 min
May 18, 10:50 PM EDTAreal Flood AdvisoryJKL10 hr
May 19, 8:03 AM EDTAreal Flood WarningJKL12 hr
May 19, 10:12 AM EDTAreal Flood AdvisoryJKL9 hr
May 19, 7:20 PM EDTAreal Flood AdvisoryJKL115 min
May 19, 7:47 PM EDTRiver Flood AdvisoryJKL41 hr
May 19, 8:03 PM EDTAreal Flood AdvisoryJKL6 hr
May 19, 9:20 PM EDTAreal Flood AdvisoryJKL4 hr
May 20, 12:49 AM EDTAreal Flood AdvisoryJKL4 hr
May 20, 1:02 AM EDTRiver Flood WarningJKL26 hr
May 21, 3:00 AM EDTRiver Flood AdvisoryJKL17 hr
May 23, 4:14 PM EDTSpecial Weather StatementJKL46 min
May 24, 2:24 PM EDTAreal Flood AdvisoryJKL3 hr
May 24, 2:51 PM EDTSpecial Weather StatementJKL54 min
May 25, 3:48 PM EDTAreal Flood AdvisoryJKL3 hr
May 25, 4:09 PM EDTFlash Flood WarningJKL3 hr
Jun 4, 3:23 PM EDTAreal Flood AdvisoryJKL3 hr
Jun 4, 9:44 PM EDTSpecial Weather StatementJKL61 min
Jun 5, 10:42 PM EDTDense Fog AdvisoryJKL10 hr
Jun 10, 5:30 PM EDTSevere Thunderstorm WatchSPC5 hr
Jun 15, 7:56 AM EDTAreal Flood AdvisoryJKL2 hr
Jun 15, 10:01 AM EDTAreal Flood AdvisoryJKL59 min
Jun 21, 1:00 PM EDTMesoscale DiscussionSPC2 hr
Jun 21, 6:45 PM EDTSevere Thunderstorm WarningJKL30 min
Jun 21, 7:38 PM EDTSpecial Weather StatementJKL37 min
Jun 27, 8:28 PM EDTFlash Flood WatchJKL72 hr
Jun 29, 1:35 AM EDTAreal Flood AdvisoryJKL6 hr
Jun 29, 4:39 AM EDTFlash Flood WarningJKL6 hr
Jun 29, 7:36 PM EDTSpecial Weather StatementJKL39 min
Jul 1, 4:30 PM EDTAreal Flood AdvisoryJKL2 hr
Jul 17, 1:47 PM EDTMesoscale DiscussionSPC118 min
Jul 20, 12:57 PM EDTMesoscale DiscussionSPC2 hr
Jul 21, 10:17 PM EDTSpecial Weather StatementJKL43 min
Jul 21, 10:27 PM EDTSevere Thunderstorm WarningJKL48 min
Jul 21, 11:05 PM EDTSevere Thunderstorm WarningJKL40 min
Jul 24, 4:56 PM EDTSpecial Weather StatementJKL34 min
Jul 24, 5:07 PM EDTSevere Thunderstorm WarningJKL23 min
Jul 24, 5:26 PM EDTSpecial Weather StatementJKL34 min
Jul 30, 12:01 PM EDTFlash Flood WatchJKL40 hr
Jul 30, 11:11 PM EDTSpecial Weather StatementJKL34 min
Jul 31, 1:21 PM EDTMesoscale DiscussionSPC54 min
Jul 31, 5:02 PM EDTSpecial Weather StatementJKL28 min
Aug 14, 9:45 AM EDTFlash Flood WatchJKL18 hr
Aug 14, 4:59 PM EDTAreal Flood AdvisoryJKL97 min
Aug 18, 7:30 PM EDTSpecial Weather StatementJKL45 min
Aug 18, 8:00 PM EDTAreal Flood AdvisoryJKL2 hr
Aug 18, 8:20 PM EDTSpecial Weather StatementJKL40 min
Sep 13, 1:47 PM EDTAreal Flood AdvisoryJKL5 hr
Sep 13, 3:41 PM EDTAreal Flood AdvisoryJKL3 hr
Sep 14, 1:54 AM EDTDense Fog AdvisoryJKL5 hr
Sep 26, 3:35 AM EDTDense Fog AdvisoryJKL5 hr
Oct 16, 4:31 AM EDTFreeze WatchJKL9 hr
Oct 16, 1:57 PM EDTFreeze WarningJKL19 hr
Oct 30, 3:59 AM EDTFrost AdvisoryJKL30 hr
Oct 30, 3:57 PM EDTFreeze WatchJKL37 hr
Nov 1, 3:51 AM ESTFreeze WarningJKL30 hr
Nov 14, 3:17 AM ESTWind AdvisoryJKL40 hr
Nov 29, 3:44 PM ESTWinter Weather AdvisoryJKL42 hr
Dec 6, 3:06 AM ESTFreezing Fog AdvisoryJKL7 hr
Dec 20, 11:15 PM ESTDense Fog AdvisoryJKL10 hr
Dec 23, 4:51 AM ESTWinter Storm WatchJKL9 hr
Dec 23, 1:32 PM ESTWinter Storm WarningJKL40 hr
Dec 23, 1:32 PM ESTWinter Weather AdvisoryJKL50 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 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.