Alert archive / Kentucky / Jefferson County
Weather alerts in Jefferson County, Kentucky, 2008
134 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2008. Tap one for its archive.
- Alerts
- 134
- Warnings
- 36
- Watches
- 25
- Advisories
- 30
- Busiest month
- February27 alerts
- Busiest day
- June 28, 20089 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 2 tornado warnings covering Jefferson County in 2008 had a tornado report inside them.
Jefferson County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 0 | ||
| Severe thunderstorm warnings | 19 | 12 | 37% | 30 | 50% | 16 min |
| Flash flood warnings | 5 | 5 | 0% | 8 | 75% | 60 min |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Louisville, KY: tornado warnings | 40 | 10 | 75% | 44 | 64% | 11 min |
| NWS Louisville, KY: severe thunderstorm warnings | 186 | 84 | 55% | 322 | 60% | 18 min |
| NWS Louisville, KY: flash flood warnings | 28 | 19 | 32% | 97 | 72% | 194 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 1, 4:29 AM EST | Snow Advisory | LMK | 30 hr |
| Jan 8, 4:03 AM EST | Wind Advisory | LMK | 23 hr |
| Jan 8, 1:22 PM EST | Mesoscale Discussion | SPC | 83 min |
| Jan 8, 2:26 PM EST | Tornado Watch | SPC | 8 hr |
| Jan 8, 5:03 PM EST | Mesoscale Discussion | SPC | 117 min |
| Jan 8, 9:01 PM EST | Mesoscale Discussion | SPC | 89 min |
| Jan 8, 11:07 PM EST | High Wind Warning | LMK | 4 hr |
| Jan 21, 3:02 PM EST | Snow Advisory | LMK | 19 hr |
| Jan 29, 3:14 AM EST | Wind Advisory | LMK | 24 hr |
| Jan 29, 5:40 PM EST | Severe Thunderstorm Watch | SPC | 3 hr |
| Jan 29, 7:19 PM EST | Severe Thunderstorm Warning | LMK | 41 min |
| Jan 29, 7:52 PM EST | Severe Thunderstorm Warning | LMK | 38 min |
| Jan 31, 4:27 AM EST | Winter Weather Advisory | LMK | 24 hr |
| Feb 5, 7:45 AM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 5, 7:15 PM EST | Mesoscale Discussion | SPC | 90 min |
| Feb 5, 8:08 PM EST | Tornado Watch | SPC | 6 hr |
| Feb 5, 10:19 PM EST | Mesoscale Discussion | SPC | 86 min |
| Feb 5, 11:52 PM EST | Flash Flood Warning | LMK | 6 hr |
| Feb 6, 12:07 AM EST | Tornado Warning | LMK | 23 min |
| Feb 6, 12:27 AM EST | Tornado Warning | LMK | 33 min |
| Feb 6, 12:33 AM EST | Severe Thunderstorm Warning | LMK | 27 min |
| Feb 6, 11:54 AM EST | Mesoscale Discussion | SPC | 96 min |
| Feb 9, 3:28 AM EST | Wind Advisory | LMK | 37 hr |
| Feb 10, 4:28 PM EST | Winter Storm Watch | LMK | 12 hr |
| Feb 11, 4:05 AM EST | Winter Storm Warning | LMK | 32 hr |
| Feb 11, 2:10 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 12, 12:51 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 12, 7:54 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 12, 1:44 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 12, 3:28 PM EST | Dense Fog Advisory | LMK | 3 hr |
| Feb 12, 8:09 PM EST | Winter Weather Advisory | LMK | 8 hr |
| Feb 16, 9:31 PM EST | Wind Advisory | LMK | 24 hr |
| Feb 19, 3:39 PM EST | Snow Advisory | LMK | 19 hr |
| Feb 20, 4:21 AM EST | Winter Storm Watch | LMK | 23 hr |
| Feb 21, 3:44 AM EST | Ice Storm Warning | LMK | 24 hr |
| Feb 21, 7:15 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 21, 1:04 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 21, 6:42 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 22, 1:33 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 22, 1:11 PM EST | Dense Fog Advisory | LMK | 14 hr |
| Mar 3, 3:30 AM EST | Flood Watch | LMK | 26 hr |
| Mar 4, 1:18 PM EST | Flash Flood Watch | LMK | 5 hr |
| Mar 4, 2:36 PM EST | Flash Flood Warning | LMK | 3 hr |
| Mar 6, 4:18 AM EST | Winter Storm Watch | LMK | 24 hr |
| Mar 6, 5:07 PM EST | Winter Storm Warning | LMK | 46 hr |
| Mar 7, 8:19 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 7, 10:05 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Mar 8, 12:07 PM EST | River Flood Advisory | LMK | 4 days |
| Mar 8, 12:07 PM EST | River Flood Advisory | LMK | 4 days |
| Mar 14, 11:22 PM EDT | Dense Fog Advisory | LMK | 11 hr |
| Mar 17, 4:03 PM EDT | Flood Watch | LMK | 24 hr |
| Mar 18, 12:25 PM EDT | River Flood Warning | LMK | 5 days |
| Mar 18, 12:25 PM EDT | River Flood Warning | LMK | 5 days |
| Mar 18, 4:31 PM EDT | Flash Flood Watch | LMK | 23 hr |
| Mar 19, 4:53 AM EDT | Flash Flood Warning | LMK | 6 hr |
| Apr 1, 3:34 PM EDT | Flood Watch | LMK | 3 days |
| Apr 3, 11:45 PM EDT | Flash Flood Warning | LMK | 30 min |
| Apr 3, 11:52 PM EDT | Flash Flood Warning | LMK | 6 hr |
| Apr 11, 12:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 13, 3:44 AM EDT | Freeze Watch | LMK | 11 hr |
| Apr 13, 2:48 PM EDT | Freeze Watch | LMK | 24 hr |
| Apr 14, 3:01 PM EDT | Freeze Warning | LMK | 18 hr |
| May 2, 2:55 PM EDT | Severe Thunderstorm Warning | LMK | 34 min |
| May 2, 4:14 PM EDT | Areal Flood Advisory | LMK | 6 hr |
| May 8, 6:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| May 11, 3:09 AM EDT | Wind Advisory | LMK | 21 hr |
| May 11, 6:35 AM EDT | Mesoscale Discussion | SPC | 115 min |
| May 11, 7:42 AM EDT | Severe Thunderstorm Warning | LMK | 48 min |
| May 13, 8:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 6:44 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 3, 8:31 AM EDT | Severe Thunderstorm Warning | LMK | 29 min |
| Jun 3, 12:08 PM EDT | Tornado Watch | SPC | 5 hr |
| Jun 4, 7:09 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 4, 12:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 4, 2:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 13, 12:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 13, 1:48 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 13, 3:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 16, 8:48 AM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 16, 9:09 AM EDT | Severe Thunderstorm Watch | SPC | 12 hr |
| Jun 16, 11:46 AM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 22, 3:49 PM EDT | Severe Thunderstorm Warning | LMK | 26 min |
| Jun 26, 6:43 PM EDT | Severe Thunderstorm Warning | LMK | 47 min |
| Jun 26, 6:48 PM EDT | Severe Thunderstorm Warning | LMK | 42 min |
| Jun 27, 7:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 27, 8:10 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 27, 8:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 27, 10:07 PM EDT | Severe Thunderstorm Warning | LMK | 38 min |
| Jun 27, 10:40 PM EDT | Severe Thunderstorm Warning | LMK | 35 min |
| Jun 27, 11:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 28, 10:39 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 28, 12:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 28, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 3:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 4, 8:58 PM EDT | Areal Flood Advisory | LMK | 2 hr |
| Jul 8, 5:06 PM EDT | Severe Thunderstorm Warning | LMK | 24 min |
| Jul 8, 5:29 PM EDT | Severe Thunderstorm Warning | LMK | 31 min |
| Jul 8, 9:55 PM EDT | Severe Thunderstorm Warning | LMK | 35 min |
| Jul 8, 10:08 PM EDT | Severe Thunderstorm Warning | LMK | 37 min |
| Jul 12, 8:27 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jul 20, 6:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 20, 9:39 PM EDT | Severe Thunderstorm Warning | LMK | 36 min |
| Jul 20, 10:11 PM EDT | Severe Thunderstorm Warning | LMK | 34 min |
| Jul 21, 1:03 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 21, 1:06 PM EDT | Severe Thunderstorm Warning | LMK | 24 min |
| Jul 21, 1:14 PM EDT | Severe Thunderstorm Warning | LMK | 31 min |
| Jul 21, 11:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 22, 12:06 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 22, 2:21 AM EDT | Mesoscale Discussion | SPC | 54 min |
| Aug 1, 6:04 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 5, 3:59 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 5, 8:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 6:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Sep 13, 3:27 PM EDT | Wind Advisory | LMK | 29 hr |
| Sep 14, 11:54 AM EDT | High Wind Warning | LMK | 5 hr |
| Oct 26, 3:24 PM EDT | Freeze Watch | LMK | 30 hr |
| Oct 27, 2:32 PM EDT | Freeze Watch | LMK | 31 hr |
| Oct 28, 3:18 PM EDT | Freeze Warning | LMK | 19 hr |
| Dec 8, 9:36 PM EST | Wind Advisory | LMK | 57 min |
| Dec 8, 10:14 PM EST | Wind Advisory | LMK | 17 hr |
| Dec 13, 4:30 PM EST | Wind Advisory | LMK | 26 hr |
| Dec 14, 7:38 AM EST | Winter Storm Watch | LMK | 21 hr |
| Dec 15, 5:06 AM EST | Winter Storm Warning | LMK | 38 hr |
| Dec 16, 6:28 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 16, 7:08 PM EST | Winter Weather Advisory | LMK | 12 hr |
| Dec 19, 7:50 AM EST | Wind Advisory | LMK | 10 hr |
| Dec 21, 3:15 AM EST | Wind Advisory | LMK | 16 hr |
| Dec 21, 10:52 PM EST | Wind Chill Advisory | LMK | 10 hr |
| Dec 23, 10:36 AM EST | Freezing Rain Advisory | LMK | 9 hr |
| Dec 23, 1:08 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 23, 8:30 PM EST | Wind Advisory | LMK | 23 hr |
| Dec 27, 2:55 AM EST | Wind Advisory | LMK | 49 min |
| Dec 27, 3:44 AM EST | Wind Advisory | LMK | 29 hr |
| Dec 31, 12:49 AM EST | Wind Advisory | LMK | 6 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 archive20072009
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.