Alert archive / Kentucky / Henry County

Weather alerts in Henry County, Kentucky, 2009

110 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Henry County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts
110
Warnings
22
Watches
24
Advisories
20
Busiest month
April20 alerts
Busiest day
April 13, 20097 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 Henry County in 2009 had a tornado report inside them.

Henry County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings10100%0
Severe thunderstorm warnings12467%3100%12 min
Flash flood warnings220%0

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Louisville, KY: tornado warnings44295%1613%13 min
NWS Louisville, KY: severe thunderstorm warnings28412755%33766%15 min
NWS Louisville, KY: flash flood warnings754343%13767%89 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 5, 3:05 PM ESTWinter Weather AdvisoryLMK18 hr
Jan 6, 1:06 AM ESTMesoscale DiscussionSPC4 hr
Jan 12, 3:33 PM ESTWinter Weather AdvisoryLMK14 hr
Jan 14, 2:42 PM ESTWind Chill AdvisoryLMK19 hr
Jan 15, 3:11 PM ESTWind Chill AdvisoryLMK18 hr
Jan 25, 4:30 AM ESTWinter Storm WatchLMK24 hr
Jan 26, 4:25 AM ESTWinter Storm WarningLMK56 hr
Jan 27, 12:44 AM ESTMesoscale DiscussionSPC5 hr
Jan 27, 12:25 PM ESTMesoscale DiscussionSPC4 hr
Jan 27, 7:25 PM ESTMesoscale DiscussionSPC6 hr
Jan 28, 12:31 AM ESTMesoscale DiscussionSPC5 hr
Jan 28, 7:40 AM ESTMesoscale DiscussionSPC5 hr
Feb 2, 4:13 PM ESTWinter Weather AdvisoryLMK36 hr
Feb 10, 3:34 AM ESTHigh Wind WatchLMK11 hr
Feb 10, 2:25 PM ESTHigh Wind WarningLMK32 hr
Feb 11, 11:02 AM ESTMesoscale DiscussionSPC88 min
Feb 11, 11:38 AM ESTTornado WatchSPC6 hr
Feb 11, 1:35 PM ESTMesoscale DiscussionSPC85 min
Feb 11, 2:34 PM ESTSevere Thunderstorm WarningLMK41 min
Feb 18, 2:09 PM ESTMesoscale DiscussionSPC51 min
Feb 27, 3:45 AM ESTSevere Thunderstorm WarningLMK45 min
Feb 27, 4:19 AM ESTSevere Thunderstorm WarningLMK41 min
Mar 8, 2:31 PM EDTMesoscale DiscussionSPC119 min
Mar 8, 2:52 PM EDTTornado WatchSPC5 hr
Mar 8, 5:36 PM EDTMesoscale DiscussionSPC54 min
Mar 28, 7:24 PM EDTTornado WatchSPC4 hr
Mar 28, 10:42 PM EDTMesoscale DiscussionSPC63 min
Apr 2, 5:35 PM EDTMesoscale DiscussionSPC85 min
Apr 2, 6:27 PM EDTTornado WatchSPC3 hr
Apr 5, 3:02 PM EDTMesoscale DiscussionSPC88 min
Apr 5, 6:10 PM EDTMesoscale DiscussionSPC65 min
Apr 5, 6:37 PM EDTTornado WatchSPC5 hr
Apr 5, 7:39 PM EDTSevere Thunderstorm WarningLMK36 min
Apr 6, 3:53 AM EDTFreeze WatchLMK35 hr
Apr 6, 3:53 AM EDTFreeze WarningLMK30 hr
Apr 7, 3:11 PM EDTFreeze WarningLMK18 hr
Apr 8, 4:23 PM EDTFrost AdvisoryLMK17 hr
Apr 10, 9:53 AM EDTTornado WatchSPC7 hr
Apr 10, 2:26 PM EDTMesoscale DiscussionSPC64 min
Apr 13, 1:58 PM EDTTornado WatchSPC7 hr
Apr 13, 4:07 PM EDTSevere Thunderstorm WarningLMK23 min
Apr 13, 4:22 PM EDTMesoscale DiscussionSPC53 min
Apr 13, 4:29 PM EDTTornado WarningLMK31 min
Apr 13, 4:51 PM EDTSevere Thunderstorm WarningLMK24 min
Apr 13, 5:02 PM EDTSevere Thunderstorm WarningLMK18 min
Apr 13, 5:12 PM EDTSevere Thunderstorm WarningLMK33 min
Apr 27, 10:55 AM EDTRed Flag WarningLMK7 hr
May 8, 1:44 PM EDTSevere Thunderstorm WatchSPC6 hr
May 8, 2:43 PM EDTFlash Flood WatchLMK6 hr
May 14, 2:01 AM EDTSevere Thunderstorm WatchSPC5 hr
May 15, 1:57 PM EDTMesoscale DiscussionSPC63 min
May 17, 2:55 PM EDTFrost AdvisoryLMK16 hr
May 28, 1:28 PM EDTMesoscale DiscussionSPC62 min
May 30, 3:51 PM EDTMesoscale DiscussionSPC84 min
May 30, 4:49 PM EDTSevere Thunderstorm WatchSPC11 hr
May 30, 7:01 PM EDTMesoscale DiscussionSPC59 min
May 30, 9:53 PM EDTMesoscale DiscussionSPC67 min
May 30, 11:19 PM EDTSevere Thunderstorm WarningLMK41 min
May 30, 11:37 PM EDTMesoscale DiscussionSPC23 min
Jun 2, 4:47 PM EDTMesoscale DiscussionSPC88 min
Jun 2, 7:13 PM EDTMesoscale DiscussionSPC62 min
Jun 2, 9:19 PM EDTMesoscale DiscussionSPC56 min
Jun 11, 4:15 AM EDTMesoscale DiscussionSPC60 min
Jun 14, 12:33 PM EDTMesoscale DiscussionSPC87 min
Jun 14, 2:26 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 14, 5:03 PM EDTMesoscale DiscussionSPC57 min
Jun 14, 7:05 PM EDTMesoscale DiscussionSPC55 min
Jun 16, 2:10 PM EDTMesoscale DiscussionSPC35 min
Jun 17, 11:29 AM EDTMesoscale DiscussionSPC61 min
Jun 18, 7:09 AM EDTMesoscale DiscussionSPC2 hr
Jun 18, 7:30 AM EDTSevere Thunderstorm WatchSPC6 hr
Jun 18, 10:51 AM EDTSevere Thunderstorm WarningLMK39 min
Jun 18, 11:12 AM EDTAreal Flood AdvisoryLMK108 min
Jun 18, 11:32 AM EDTAreal Flood AdvisoryLMK3 hr
Jun 19, 4:27 AM EDTHeat AdvisoryLMK14 hr
Jun 20, 12:46 AM EDTSevere Thunderstorm WatchSPC6 hr
Jun 26, 3:08 AM EDTMesoscale DiscussionSPC2 hr
Jun 26, 3:34 PM EDTMesoscale DiscussionSPC86 min
Jul 25, 4:09 AM EDTMesoscale DiscussionSPC96 min
Jul 25, 12:24 PM EDTMesoscale DiscussionSPC2 hr
Jul 25, 2:38 PM EDTSevere Thunderstorm WatchSPC6 hr
Jul 25, 3:32 PM EDTSevere Thunderstorm WarningLMK32 min
Jul 29, 7:36 AM EDTAreal Flood AdvisoryLMK3 hr
Jul 29, 7:39 AM EDTAreal Flood AdvisoryLMK3 hr
Jul 30, 3:33 PM EDTFlash Flood WatchLMK15 hr
Aug 4, 9:41 AM EDTSevere Thunderstorm WatchSPC6 hr
Aug 4, 9:47 AM EDTMesoscale DiscussionSPC58 min
Aug 4, 1:33 PM EDTSevere Thunderstorm WarningLMK27 min
Aug 4, 1:43 PM EDTFlash Flood WarningLMK4 hr
Aug 4, 5:18 PM EDTAreal Flood WarningLMK6 hr
Aug 4, 8:21 PM EDTFlash Flood WatchLMK16 hr
Aug 10, 3:24 PM EDTMesoscale DiscussionSPC96 min
Aug 10, 6:18 PM EDTAreal Flood AdvisoryLMK68 min
Aug 10, 6:58 PM EDTMesoscale DiscussionSPC2 hr
Aug 20, 11:42 AM EDTMesoscale DiscussionSPC2 hr
Aug 28, 2:57 PM EDTMesoscale DiscussionSPC3 hr
Sep 8, 5:46 AM EDTDense Fog AdvisoryLMK6 hr
Sep 9, 4:58 AM EDTDense Fog AdvisoryLMK5 hr
Sep 20, 10:31 PM EDTAreal Flood AdvisoryLMK3 hr
Sep 24, 2:36 PM EDTFlash Flood WatchLMK57 hr
Oct 9, 12:55 AM EDTAreal Flood AdvisoryLMK45 min
Oct 9, 1:38 AM EDTFlash Flood WarningLMK8 hr
Oct 17, 3:27 AM EDTFreeze WatchLMK12 hr
Oct 17, 3:41 PM EDTFrost AdvisoryLMK17 hr
Oct 23, 2:44 PM EDTMesoscale DiscussionSPC91 min
Dec 7, 3:39 PM ESTHigh Wind WatchLMK24 hr
Dec 8, 4:00 PM ESTHigh Wind WarningLMK27 hr
Dec 9, 3:46 AM ESTMesoscale DiscussionSPC59 min
Dec 18, 4:53 AM ESTWinter Weather AdvisoryLMK47 hr
Dec 24, 3:18 PM ESTWind AdvisoryLMK19 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 archive20082010

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.