Alert archive / Indiana / Jefferson County
Weather alerts in Jefferson County, Indiana, 2023
123 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 123
- Warnings
- 23
- Watches
- 17
- Advisories
- 35
- Busiest month
- July31 alerts
- Busiest day
- April 5, 20236 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 Jefferson County in 2023 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Jefferson County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 1 | 0% | |
| Severe thunderstorm warnings | 13 | 8 | 38% | 11 | 82% | 13 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Louisville, KY: tornado warnings | 42 | 12 | 71% | 40 | 45% | 18 min |
| NWS Louisville, KY: severe thunderstorm warnings | 328 | 208 | 37% | 560 | 82% | 17 min |
| NWS Louisville, KY: flash flood warnings | 34 | 19 | 44% | 66 | 83% | 63 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 12, 5:21 AM EST | Severe Thunderstorm Warning | LMK | 24 min |
| Jan 12, 5:26 AM EST | Severe Thunderstorm Warning | LMK | 21 min |
| Jan 12, 5:44 AM EST | Severe Thunderstorm Warning | LMK | 31 min |
| Jan 12, 8:00 AM EST | Special Weather Statement | LMK | 30 min |
| Jan 12, 8:15 AM EST | Areal Flood Advisory | LMK | 3 hr |
| Jan 13, 10:37 PM EST | Winter Weather Advisory | LMK | 5 hr |
| Jan 18, 2:55 PM EST | Wind Advisory | LMK | 28 hr |
| Jan 19, 1:13 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Jan 19, 1:54 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Jan 22, 6:31 AM EST | Winter Weather Advisory | LMK | 6 hr |
| Jan 24, 3:37 AM EST | Winter Weather Advisory | LMK | 31 hr |
| Jan 24, 2:50 PM EST | Wind Advisory | LMK | 28 hr |
| Jan 25, 12:44 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 27, 2:52 AM EST | Wind Advisory | LMK | 16 hr |
| Jan 30, 3:34 AM EST | Winter Weather Advisory | LMK | 32 hr |
| Feb 8, 3:15 AM EST | Wind Advisory | LMK | 40 hr |
| Feb 13, 2:53 PM EST | Wind Advisory | LMK | 33 hr |
| Feb 16, 3:35 AM EST | Flood Watch | LMK | 15 hr |
| Feb 21, 3:52 PM EST | Wind Advisory | LMK | 30 hr |
| Feb 26, 4:14 AM EST | Wind Advisory | LMK | 35 hr |
| Feb 27, 2:49 PM EST | High Wind Warning | LMK | 2 hr |
| Feb 27, 5:01 PM EST | Wind Advisory | LMK | 119 min |
| Mar 1, 5:56 PM EST | Mesoscale Discussion | SPC | 64 min |
| Mar 1, 6:56 PM EST | Severe Thunderstorm Warning | LMK | 19 min |
| Mar 1, 7:20 PM EST | Severe Thunderstorm Warning | LMK | 25 min |
| Mar 2, 3:39 AM EST | Flood Watch | LMK | 36 hr |
| Mar 2, 3:41 AM EST | Wind Advisory | LMK | 44 hr |
| Mar 3, 12:07 PM EST | Tornado Watch | SPC | 4 hr |
| Mar 3, 2:40 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Mar 3, 7:05 PM EST | River Flood Warning | LMK | 13 hr |
| Mar 22, 2:50 PM EDT | Flood Watch | LMK | 60 hr |
| Mar 23, 6:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 24, 12:41 PM EDT | Wind Advisory | LMK | 28 hr |
| Mar 24, 11:50 PM EDT | Areal Flood Advisory | LMK | 4 hr |
| Mar 25, 5:17 AM EDT | River Flood Advisory | LMK | 35 min |
| Mar 25, 5:51 AM EDT | River Flood Warning | LMK | 16 hr |
| Mar 31, 3:50 AM EDT | Wind Advisory | LMK | 37 hr |
| Mar 31, 5:31 PM EDT | Special Weather Statement | LMK | 44 min |
| Mar 31, 7:59 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 1, 12:59 AM EDT | Special Weather Statement | LMK | 31 min |
| Apr 1, 10:30 AM EDT | High Wind Warning | LMK | 5 hr |
| Apr 1, 10:30 AM EDT | Wind Advisory | LMK | 7 hr |
| Apr 4, 2:00 PM EDT | Wind Advisory | LMK | 30 hr |
| Apr 5, 10:09 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 5, 10:25 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 5, 1:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 5, 2:38 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 5, 3:17 PM EDT | Special Weather Statement | LMK | 13 min |
| Apr 5, 4:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Apr 17, 3:11 PM EDT | Frost Advisory | LMK | 18 hr |
| Apr 19, 3:26 AM EDT | Fire Weather Watch | LMK | 12 hr |
| Apr 19, 3:24 PM EDT | Red Flag Warning | LMK | 29 hr |
| Apr 22, 3:38 AM EDT | Frost Advisory | LMK | 29 hr |
| Apr 23, 4:00 AM EDT | Freeze Warning | LMK | 29 hr |
| Apr 24, 2:55 PM EDT | Frost Advisory | LMK | 18 hr |
| May 1, 2:49 AM EDT | Wind Advisory | LMK | 17 hr |
| May 7, 6:30 AM EDT | Special Weather Statement | LMK | 30 min |
| May 7, 6:54 AM EDT | Special Weather Statement | LMK | 36 min |
| May 7, 7:52 AM EDT | Special Weather Statement | LMK | 38 min |
| May 7, 8:07 AM EDT | Areal Flood Advisory | LMK | 2 hr |
| Jun 25, 7:25 AM EDT | Special Weather Statement | LMK | 35 min |
| Jun 25, 3:54 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 25, 5:46 PM EDT | Tornado Warning | LMK | 29 min |
| Jun 25, 5:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 25, 6:10 PM EDT | Severe Thunderstorm Warning | LMK | 35 min |
| Jun 25, 7:13 PM EDT | Severe Thunderstorm Warning | LMK | 32 min |
| Jun 25, 8:33 PM EDT | Special Weather Statement | LMK | 27 min |
| Jun 29, 3:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 4:15 PM EDT | Severe Thunderstorm Warning | LMK | 45 min |
| Jun 29, 4:17 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 30, 5:36 AM EDT | Areal Flood Advisory | LMK | 113 min |
| Jul 1, 12:59 AM EDT | Severe Thunderstorm Warning | LMK | 31 min |
| Jul 1, 1:58 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 1, 3:18 AM EDT | Special Weather Statement | LMK | 27 min |
| Jul 1, 4:35 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 1, 4:55 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 1, 7:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 1, 9:29 PM EDT | Special Weather Statement | LMK | 31 min |
| Jul 2, 12:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 1:33 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 2, 2:08 PM EDT | Special Weather Statement | LMK | 37 min |
| Jul 8, 10:15 AM EDT | Special Weather Statement | LMK | 45 min |
| Jul 8, 6:25 PM EDT | Areal Flood Advisory | LMK | 3 hr |
| Jul 13, 3:02 PM EDT | Special Weather Statement | LMK | 28 min |
| Jul 13, 3:31 PM EDT | Special Weather Statement | LMK | 29 min |
| Jul 13, 5:31 PM EDT | Areal Flood Advisory | LMK | 3 hr |
| Jul 17, 1:03 AM EDT | Severe Thunderstorm Warning | LMK | 28 min |
| Jul 17, 7:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 17, 10:41 PM EDT | Special Weather Statement | LMK | 34 min |
| Jul 17, 10:56 PM EDT | Severe Thunderstorm Warning | LMK | 34 min |
| Jul 17, 11:54 PM EDT | Areal Flood Advisory | LMK | 3 hr |
| Jul 23, 6:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 24, 2:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 24, 3:37 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 24, 4:17 PM EDT | Special Weather Statement | LMK | 28 min |
| Jul 24, 4:45 PM EDT | Special Weather Statement | LMK | 30 min |
| Jul 24, 4:58 PM EDT | Severe Thunderstorm Warning | LMK | 32 min |
| Jul 24, 6:12 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jul 24, 8:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 26, 3:42 AM EDT | Heat Advisory | LMK | 65 hr |
| Jul 27, 3:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 29, 3:02 AM EDT | Heat Advisory | LMK | 17 hr |
| Aug 6, 9:37 PM EDT | Tornado Watch | SPC | 7 hr |
| Aug 7, 12:07 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 7, 1:13 AM EDT | Severe Thunderstorm Warning | LMK | 47 min |
| Aug 7, 1:54 AM EDT | Special Weather Statement | LMK | 36 min |
| Aug 7, 2:15 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 8:53 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 12, 9:54 AM EDT | Special Weather Statement | LMK | 36 min |
| Aug 12, 10:30 AM EDT | Special Weather Statement | LMK | 45 min |
| Aug 14, 4:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 2:47 PM EDT | Excessive Heat Watch | LMK | 37 hr |
| Aug 20, 3:19 PM EDT | Excessive Heat Warning | LMK | 5 days |
| Aug 22, 3:07 PM EDT | Excessive Heat Warning | LMK | 4 days |
| Aug 22, 3:07 PM EDT | Heat Advisory | LMK | 3 days |
| Aug 25, 4:25 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 25, 5:27 PM EDT | Special Weather Statement | LMK | 48 min |
| Aug 26, 1:53 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 28, 9:15 PM EDT | Dense Fog Advisory | LMK | 14 hr |
| Oct 22, 3:22 AM EDT | Frost Advisory | LMK | 31 hr |
| Oct 29, 3:46 AM EDT | Freeze Watch | LMK | 24 hr |
| Oct 30, 3:32 AM EDT | Freeze Warning | LMK | 30 hr |
| Dec 17, 2:31 PM EST | Winter Weather Advisory | LMK | 25 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 | 13 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 22 |
| Flooding | |
| River Flood Warning | 2 |
| Flood Watch | 3 |
| Areal Flood Advisory | 7 |
| River Flood Advisory | 1 |
| Winter | |
| Winter Weather Advisory | 5 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 2 |
| Wind Advisory | 14 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.