Alert archive / Missouri / Jefferson County
Weather alerts in Jefferson County, Missouri, 2021
98 weather alerts in 2021, 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 2021. Tap one for its archive.
- Alerts
- 98
- Warnings
- 35
- Watches
- 15
- Advisories
- 24
- Busiest month
- March16 alerts
- Busiest day
- July 10, 20217 alerts
Over time
By month
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 |
|---|---|---|---|
| Dec 31, 8:44 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 3, 1:55 PM CST | Dense Fog Advisory | LSX | 30 hr |
| Jan 14, 2:33 PM CST | Winter Weather Advisory | LSX | 29 hr |
| Jan 25, 6:48 PM CST | River Flood Warning | LSX | 31 hr |
| Jan 26, 8:19 PM CST | Winter Weather Advisory | LSX | 19 hr |
| Feb 5, 2:19 PM CST | Winter Weather Advisory | LSX | 31 hr |
| Feb 8, 9:18 AM CST | Winter Weather Advisory | LSX | 19 hr |
| Feb 9, 4:02 AM CST | Winter Weather Advisory | LSX | 38 hr |
| Feb 13, 3:24 AM CST | Wind Chill Advisory | LSX | 3 days |
| Feb 13, 2:40 PM CST | Winter Weather Advisory | LSX | 56 hr |
| Feb 14, 2:44 PM CST | Winter Storm Warning | LSX | 31 hr |
| Feb 16, 3:26 AM CST | Winter Weather Advisory | LSX | 39 hr |
| Mar 10, 3:11 AM CST | Wind Advisory | LSX | 15 hr |
| Mar 11, 3:27 AM CST | Flood Watch | LSX | 55 hr |
| Mar 12, 9:57 AM CST | River Flood Warning | LSX | 57 hr |
| Mar 15, 2:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Mar 16, 12:58 AM CDT | Dense Fog Advisory | LSX | 9 hr |
| Mar 17, 8:51 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Mar 18, 10:12 AM CDT | River Flood Warning | LSX | 21 days |
| Mar 18, 4:11 PM CDT | River Flood Warning | LSX | 42 hr |
| Mar 19, 11:23 AM CDT | River Flood Warning | LSX | 3 days |
| Mar 19, 11:23 AM CDT | River Flood Warning | LSX | 24 hr |
| Mar 25, 3:16 AM CDT | Wind Advisory | LSX | 21 hr |
| Mar 27, 2:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Mar 27, 4:44 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 27, 6:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Mar 30, 2:43 PM CDT | Freeze Warning | LSX | 42 hr |
| Mar 31, 2:44 PM CDT | Freeze Warning | LSX | 42 hr |
| Apr 7, 12:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 7, 5:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 7, 5:37 PM CDT | Severe Thunderstorm Warning | LSX | 68 min |
| Apr 11, 9:30 PM CDT | River Flood Warning | LSX | 4 days |
| Apr 18, 2:42 PM CDT | Freeze Watch | LSX | 22 hr |
| Apr 19, 1:01 PM CDT | Freeze Warning | LSX | 23 hr |
| Apr 19, 11:02 PM CDT | Freeze Warning | LSX | 34 hr |
| Apr 21, 3:08 AM CDT | Freeze Warning | LSX | 30 hr |
| Apr 27, 2:28 PM CDT | Flash Flood Watch | LSX | 39 hr |
| Apr 29, 1:49 AM CDT | Flash Flood Warning | LSX | 4 hr |
| Apr 29, 2:27 AM CDT | Flash Flood Warning | LSX | 4 hr |
| Apr 29, 9:44 AM CDT | River Flood Warning | LSX | 30 hr |
| May 3, 2:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 3, 2:47 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 3, 4:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| May 3, 5:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| May 6, 9:52 AM CDT | Mesoscale Discussion | SPC | 83 min |
| May 27, 11:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| May 27, 11:26 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 27, 12:39 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| May 27, 12:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 27, 2:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 27, 2:46 PM CDT | Severe Thunderstorm Warning | LSX | 29 min |
| Jun 17, 2:12 PM CDT | Heat Advisory | LSX | 3 days |
| Jun 19, 2:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 19, 2:43 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 19, 5:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 19, 5:25 PM CDT | Severe Thunderstorm Warning | LSX | 35 min |
| Jun 19, 6:00 PM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| Jun 26, 11:42 AM CDT | River Flood Warning | LSX | 8 days |
| Jul 9, 2:53 AM CDT | Flash Flood Watch | LSX | 47 hr |
| Jul 9, 8:18 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 9, 11:59 PM CDT | Severe Thunderstorm Warning | LSX | 61 min |
| Jul 10, 12:42 AM CDT | Severe Thunderstorm Warning | LSX | 63 min |
| Jul 10, 1:01 AM CDT | Mesoscale Discussion | SPC | 59 min |
| Jul 10, 1:08 AM CDT | Severe Thunderstorm Warning | LSX | 52 min |
| Jul 10, 1:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 2:01 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 16, 1:40 AM CDT | Areal Flood Advisory | LSX | 3 hr |
| Jul 23, 3:04 AM CDT | Heat Advisory | LSX | 41 hr |
| Jul 25, 10:11 AM CDT | Flash Flood Warning | LSX | 3 hr |
| Jul 27, 2:47 AM CDT | Heat Advisory | LSX | 66 hr |
| Aug 8, 11:40 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 8, 12:44 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 8, 2:37 PM CDT | Heat Advisory | LSX | 4 days |
| Aug 8, 3:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 5:19 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 12, 5:51 PM CDT | Severe Thunderstorm Warning | LSX | 54 min |
| Aug 12, 6:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 12, 6:37 PM CDT | Severe Thunderstorm Warning | LSX | 53 min |
| Aug 12, 7:14 PM CDT | Severe Thunderstorm Warning | LSX | 61 min |
| Aug 22, 2:59 PM CDT | Heat Advisory | LSX | 6 days |
| Aug 30, 2:38 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| Sep 14, 3:18 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Oct 11, 9:06 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 24, 12:40 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 24, 2:06 PM CDT | Tornado Watch | SPC | 9 hr |
| Oct 24, 7:39 PM CDT | Severe Thunderstorm Warning | LSX | 51 min |
| Oct 24, 9:08 PM CDT | Severe Thunderstorm Warning | LSX | 54 min |
| Nov 2, 2:04 PM CDT | Freeze Warning | LSX | 19 hr |
| Dec 10, 2:28 AM CST | Dense Fog Advisory | LSX | 9 hr |
| Dec 10, 3:07 PM CST | Tornado Watch | SPC | 11 hr |
| Dec 10, 7:02 PM CST | Mesoscale Discussion | SPC | 58 min |
| Dec 10, 7:35 PM CST | Tornado Warning | LSX | 40 min |
| Dec 10, 8:29 PM CST | Severe Thunderstorm Warning | LSX | 30 min |
| Dec 10, 9:07 PM CST | Severe Thunderstorm Warning | LSX | 38 min |
| Dec 10, 10:19 PM CST | Severe Thunderstorm Warning | LSX | 41 min |
| Dec 14, 2:20 PM CST | Wind Advisory | LSX | 36 hr |
| Dec 25, 11:55 PM CST | Dense Fog Advisory | LSX | 12 hr |
| Dec 29, 10:09 PM CST | Dense Fog Advisory | LSX | 14 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 | 15 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 24 |
| Flooding | |
| Flash Flood Warning | 3 |
| River Flood Warning | 9 |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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. Rebuilt daily.