Alert archive / Missouri / Knox County
Weather alerts in Knox County, Missouri, 2025
85 weather alerts in 2025, 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 2025. Tap one for its archive.
- Alerts
- 85
- Warnings
- 20
- Watches
- 14
- Advisories
- 36
- Busiest month
- March11 alerts
- Busiest day
- August 9, 20256 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 1 tornado warnings covering Knox County in 2025 had a tornado report inside them.
Knox County, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 5 | 4 | 20% | 2 | 100% | 36 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2025
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS St. Louis, MO: tornado warnings | 93 | 34 | 63% | 66 | 76% | 16 min |
| NWS St. Louis, MO: severe thunderstorm warnings | 231 | 103 | 55% | 633 | 67% | 23 min |
| NWS St. Louis, MO: flash flood warnings | 51 | 19 | 63% | 98 | 67% | 105 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 2:29 PM CST | Winter Storm Watch | LSX | 23 hr |
| Jan 3, 1:29 PM CST | Winter Storm Warning | LSX | 65 hr |
| Jan 20, 2:45 AM CST | Cold Weather Advisory | LSX | 36 hr |
| Jan 21, 1:24 AM CST | Extreme Cold Warning | LSX | 11 hr |
| Jan 30, 8:26 PM CST | Dense Fog Advisory | LSX | 11 hr |
| Feb 4, 2:41 AM CST | Winter Weather Advisory | LSX | 48 hr |
| Feb 10, 2:57 AM CST | Winter Storm Watch | LSX | 24 hr |
| Feb 11, 3:21 AM CST | Winter Storm Warning | LSX | 33 hr |
| Feb 11, 3:21 AM CST | Winter Weather Advisory | LSX | 39 hr |
| Feb 16, 1:42 PM CST | Winter Weather Advisory | LSX | 28 hr |
| Feb 17, 2:09 AM CST | Cold Weather Advisory | LSX | 34 hr |
| Feb 18, 12:30 PM CST | Cold Weather Advisory | LSX | 24 hr |
| Feb 18, 12:30 PM CST | Cold Weather Advisory | LSX | 48 hr |
| Feb 28, 2:31 AM CST | Red Flag Warning | LSX | 17 hr |
| Mar 3, 2:11 PM CST | Wind Advisory | LSX | 35 hr |
| Mar 5, 1:08 AM CST | High Wind Warning | LSX | 10 hr |
| Mar 5, 1:19 AM CST | Wind Advisory | LSX | 17 hr |
| Mar 10, 2:46 AM CDT | Red Flag Warning | LSX | 17 hr |
| Mar 13, 2:08 AM CDT | Wind Advisory | LSX | 47 hr |
| Mar 14, 3:32 AM CDT | Red Flag Warning | LSX | 13 hr |
| Mar 14, 4:03 PM CDT | Tornado Watch | SPC | 9 hr |
| Mar 16, 2:43 PM CDT | Red Flag Warning | LSX | 29 hr |
| Mar 18, 1:18 PM CDT | Wind Advisory | LSX | 38 hr |
| Mar 18, 9:07 PM CDT | Red Flag Warning | LSX | 22 hr |
| Mar 20, 2:30 PM CDT | Red Flag Warning | LSX | 29 hr |
| Apr 1, 2:00 PM CDT | Wind Advisory | LSX | 28 hr |
| Apr 6, 2:24 AM CDT | Freeze Watch | LSX | 23 hr |
| Apr 7, 1:23 AM CDT | Freeze Warning | LSX | 32 hr |
| Apr 20, 2:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 20, 3:41 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 20, 5:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Apr 22, 4:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| May 19, 3:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 2, 1:12 PM CDT | Flood Watch | LSX | 38 hr |
| Jun 3, 12:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 1:38 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 3, 4:27 PM CDT | Severe Thunderstorm Warning | LSX | 48 min |
| Jun 3, 4:51 PM CDT | Severe Thunderstorm Warning | LSX | 39 min |
| Jun 3, 5:23 PM CDT | Severe Thunderstorm Warning | LSX | 67 min |
| Jun 14, 1:42 AM CDT | Dense Fog Advisory | LSX | 7 hr |
| Jun 19, 1:56 PM CDT | Heat Advisory | LSX | 7 days |
| Jul 11, 12:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 11, 2:19 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 11, 6:47 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 11, 9:14 PM CDT | Flash Flood Warning | LSX | 3 hr |
| Jul 14, 1:37 AM CDT | Dense Fog Advisory | LSX | 7 hr |
| Jul 18, 2:06 PM CDT | Extreme Heat Watch | LSX | 4 days |
| Jul 19, 7:13 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 20, 1:44 AM CDT | Flood Watch | LSX | 33 hr |
| Jul 21, 1:57 PM CDT | Heat Advisory | LSX | 9 days |
| Jul 24, 2:18 AM CDT | Flood Watch | LSX | 25 hr |
| Aug 9, 2:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 9, 3:00 PM CDT | Flood Watch | LSX | 23 hr |
| Aug 9, 5:35 PM CDT | Severe Thunderstorm Warning | LSX | 70 min |
| Aug 9, 6:07 PM CDT | Tornado Warning | LSX | 28 min |
| Aug 9, 6:15 PM CDT | Areal Flood Advisory | LSX | 2 hr |
| Aug 9, 6:42 PM CDT | Severe Thunderstorm Warning | LSX | 48 min |
| Aug 11, 7:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 14, 2:34 PM CDT | Heat Advisory | LSX | 5 days |
| Aug 18, 3:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Sep 15, 4:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Sep 21, 3:34 AM CDT | Dense Fog Advisory | LSX | 5 hr |
| Oct 11, 12:18 AM CDT | Dense Fog Advisory | LSX | 10 hr |
| Oct 22, 12:00 PM CDT | Frost Advisory | LSX | 21 hr |
| Oct 30, 1:47 PM CDT | Frost Advisory | LSX | 18 hr |
| Oct 31, 2:16 AM CDT | Freeze Watch | LSX | 36 hr |
| Nov 1, 1:55 AM CDT | Freeze Warning | LSX | 31 hr |
| Nov 2, 2:21 AM CST | Dense Fog Advisory | LSX | 8 hr |
| Nov 20, 7:22 PM CST | Dense Fog Advisory | LSX | 16 hr |
| Nov 23, 4:23 AM CST | Dense Fog Advisory | LSX | 6 hr |
| Nov 23, 5:41 PM CST | Dense Fog Advisory | LSX | 15 hr |
| Nov 27, 3:25 AM CST | Winter Storm Watch | LSX | 23 hr |
| Nov 28, 2:17 AM CST | Winter Storm Warning | LSX | 39 hr |
| Nov 29, 3:18 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Nov 29, 10:42 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Nov 30, 12:51 PM CST | Winter Weather Advisory | LSX | 38 hr |
| Dec 9, 1:17 PM CST | Wind Advisory | LSX | 23 hr |
| Dec 12, 12:53 PM CST | Cold Weather Advisory | LSX | 47 hr |
| Dec 12, 1:20 PM CST | Winter Weather Advisory | LSX | 29 hr |
| Dec 18, 1:56 AM CST | Wind Advisory | LSX | 22 hr |
| Dec 24, 12:49 PM CST | Dense Fog Advisory | LSX | 41 hr |
| Dec 26, 7:29 PM CST | Dense Fog Advisory | LSX | 17 hr |
| Dec 27, 6:32 PM CST | Dense Fog Advisory | LSX | 8 hr |
| Dec 28, 7:16 AM CST | Mesoscale Discussion | SPC | 119 min |
| Dec 28, 8:01 AM CST | Wind Advisory | LSX | 22 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 | 5 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 15 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flood Watch | 4 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 5 |
| Heat | |
| Extreme Heat Watch | 1 |
| Heat Advisory | 3 |
| Cold | |
| Extreme Cold Warning | 1 |
| Freeze Warning | 2 |
| Freeze Watch | 2 |
| Cold Weather Advisory | 5 |
| Frost Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 12 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
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.