Alert archive / Missouri / Knox County
Weather alerts in Knox County, Missouri, 2026
90 weather alerts in 2026, 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 2026. Tap one for its archive.
- Alerts
- 90
- Warnings
- 24
- Watches
- 21
- Advisories
- 22
- Busiest month
- June30 alerts
- Busiest day
- June 11, 202614 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 3 tornado warnings covering Knox County in 2026 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 5 minutes after it went out.
Knox County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 1 | 100% | 5 min |
| Severe thunderstorm warnings | 12 | 0 | 100% | 1 | 0% | |
| Flash flood warnings | 3 | 2 | 33% | 1 | 100% | 97 min |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS St. Louis, MO: tornado warnings | 80 | 18 | 78% | 57 | 61% | 20 min |
| NWS St. Louis, MO: severe thunderstorm warnings | 258 | 110 | 57% | 561 | 76% | 21 min |
| NWS St. Louis, MO: flash flood warnings | 61 | 25 | 59% | 82 | 76% | 97 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
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 18, 1:59 AM CST | Cold Weather Advisory | LSX | 32 hr |
| Jan 22, 2:29 AM CST | Cold Weather Advisory | LSX | 58 hr |
| Jan 23, 2:24 AM CST | Winter Weather Advisory | LSX | 55 hr |
| Jan 24, 1:38 PM CST | Cold Weather Advisory | LSX | 46 hr |
| Feb 18, 1:00 PM CST | Red Flag Warning | LSX | 31 hr |
| Feb 26, 2:05 PM CST | Fire Weather Watch | LSX | 10 hr |
| Feb 27, 12:28 AM CST | Red Flag Warning | LSX | 18 hr |
| Mar 1, 1:34 AM CST | Winter Weather Advisory | LSX | 23 hr |
| Mar 4, 8:42 PM CST | Dense Fog Advisory | LSX | 9 hr |
| Mar 10, 5:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 10, 5:57 PM CDT | Tornado Watch | SPC | 6 hr |
| Mar 10, 8:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Mar 10, 9:12 PM CDT | Severe Thunderstorm Warning | LSX | 27 min |
| Mar 10, 9:47 PM CDT | Severe Thunderstorm Warning | LSX | 38 min |
| Mar 12, 3:05 AM CDT | Wind Advisory | LSX | 30 hr |
| Mar 14, 10:45 AM CDT | Wind Advisory | LSX | 49 hr |
| Mar 15, 2:37 PM CDT | Winter Weather Advisory | LSX | 16 hr |
| Mar 26, 7:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 27, 11:40 AM CDT | Freeze Warning | LSX | 21 hr |
| Apr 1, 7:25 PM CDT | Flood Watch | LSX | 15 hr |
| Apr 2, 3:46 AM CDT | Wind Advisory | LSX | 15 hr |
| Apr 2, 12:28 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 2, 1:43 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 2, 3:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 3, 1:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 3, 2:20 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 14, 3:05 AM CDT | Severe Thunderstorm Warning | LSX | 55 min |
| Apr 15, 6:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 15, 6:50 PM CDT | Tornado Watch | SPC | 4 hr |
| Apr 17, 7:57 AM CDT | Flood Watch | LSX | 19 hr |
| Apr 17, 3:30 PM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| Apr 17, 3:31 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 17, 4:04 PM CDT | Severe Thunderstorm Warning | LSX | 23 min |
| Apr 17, 5:03 PM CDT | Tornado Warning | LSX | 42 min |
| Apr 17, 5:51 PM CDT | Severe Thunderstorm Warning | LSX | 54 min |
| Apr 17, 5:58 PM CDT | Tornado Warning | LSX | 32 min |
| Apr 17, 6:46 PM CDT | Severe Thunderstorm Warning | LSX | 44 min |
| Apr 27, 6:52 AM CDT | Severe Thunderstorm Warning | LSX | 38 min |
| May 3, 8:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| May 4, 6:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 18, 9:35 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 7, 1:26 PM CDT | Flood Watch | LSX | 40 hr |
| Jun 8, 11:44 AM CDT | Heat Advisory | LSX | 32 hr |
| Jun 10, 7:43 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 10:44 AM CDT | Flood Watch | LSX | 16 hr |
| Jun 10, 11:09 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 12:24 PM CDT | Areal Flood Advisory | LSX | 53 min |
| Jun 10, 4:01 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 10, 4:27 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 10, 6:42 PM CDT | Tornado Warning | LSX | 49 min |
| Jun 10, 8:19 PM CDT | Flash Flood Warning | LSX | 5 hr |
| Jun 10, 9:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 10, 11:05 PM CDT | Flash Flood Warning | LSX | 3 hr |
| Jun 11, 7:31 AM CDT | Tornado Watch | SPC | 7 hr |
| Jun 11, 9:53 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 11, 10:09 AM CDT | Severe Thunderstorm Warning | LSX | 51 min |
| Jun 11, 11:50 AM CDT | Flood Watch | LSX | 7 hr |
| Jun 11, 1:08 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 11, 1:57 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 11, 3:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 11, 3:29 PM CDT | Severe Thunderstorm Warning | LSX | 61 min |
| Jun 11, 3:44 PM CDT | Flash Flood Warning | LSX | 3 hr |
| Jun 11, 4:02 PM CDT | Severe Thunderstorm Warning | LSX | 58 min |
| Jun 11, 4:48 PM CDT | Severe Thunderstorm Warning | LSX | 57 min |
| Jun 13, 11:51 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 16, 12:39 PM CDT | Wind Advisory | LSX | 31 hr |
| Jun 17, 1:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 17, 2:14 PM CDT | Tornado Watch | SPC | 11 hr |
| Jun 20, 1:28 AM CDT | Flood Watch | LSX | 45 hr |
| Jun 27, 1:59 AM CDT | Heat Advisory | LSX | 71 hr |
| Jun 27, 1:15 PM CDT | Extreme Heat Warning | LSX | 7 days |
| Jul 2, 11:50 AM CDT | Heat Advisory | LSX | 54 hr |
| Jul 5, 9:22 PM CDT | Dense Fog Advisory | LSX | 8 hr |
| Jul 10, 2:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 10, 2:50 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 17, 11:01 AM CDT | Heat Advisory | LSX | 4 days |
| Jul 24, 1:12 AM CDT | Extreme Heat Watch | LSX | 11 hr |
| Jul 24, 12:15 PM CDT | Heat Advisory | LSX | 47 hr |
| Jul 26, 12:40 AM CDT | Extreme Heat Warning | LSX | 66 hr |
| Jul 31, 2:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 1:57 AM CDT | Flood Watch | LSX | 35 hr |
| Aug 9, 1:05 AM CDT | Heat Advisory | LSX | 8 days |
| Aug 14, 9:48 PM CDT | Flood Watch | LSX | 12 hr |
| Aug 14, 11:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 4:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Aug 30, 12:27 PM CDT | Heat Advisory | LSX | 3 days |
| Sep 3, 12:12 AM CDT | Extreme Heat Warning | LSX | 68 hr |
| Sep 10, 9:56 PM CDT | Dense Fog Advisory | LSX | 12 hr |
| Sep 15, 2:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Sep 16, 12:45 AM CDT | Areal Flood Advisory | LSX | 5 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 | 12 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 9 |
| Mesoscale Discussion | 23 |
| Flooding | |
| Flash Flood Warning | 3 |
| Flood Watch | 8 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Weather Advisory | 3 |
| Heat | |
| Extreme Heat Warning | 3 |
| Extreme Heat Watch | 1 |
| Heat Advisory | 7 |
| Cold | |
| Freeze Warning | 1 |
| Cold Weather Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
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.