Alert archive / Iowa / Jefferson County
Weather alerts in Jefferson County, Iowa, 2021
100 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
- 100
- Warnings
- 25
- Watches
- 13
- Advisories
- 38
- Busiest month
- June18 alerts
- Busiest day
- June 19, 20215 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 |
|---|---|---|---|
| Jan 2, 2:49 PM CST | Dense Fog Advisory | DVN | 21 hr |
| Jan 3, 2:22 PM CST | Dense Fog Advisory | DVN | 28 hr |
| Jan 5, 3:41 PM CST | Dense Fog Advisory | DVN | 18 hr |
| Jan 6, 2:37 PM CST | Dense Fog Advisory | DVN | 13 hr |
| Jan 13, 2:53 PM CST | Winter Weather Advisory | DVN | 44 hr |
| Jan 19, 4:59 AM CST | Winter Weather Advisory | DVN | 5 hr |
| Jan 23, 3:44 PM CST | Winter Storm Watch | DVN | 23 hr |
| Jan 24, 2:43 PM CST | Winter Storm Warning | DVN | 45 hr |
| Jan 24, 2:43 PM CST | Winter Weather Advisory | DVN | 45 hr |
| Jan 25, 3:26 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 29, 2:29 PM CST | Winter Weather Advisory | DVN | 52 hr |
| Feb 3, 1:04 AM CST | Dense Fog Advisory | DVN | 10 hr |
| Feb 3, 4:01 AM CST | Winter Weather Advisory | DVN | 56 hr |
| Feb 3, 2:56 PM CST | Winter Storm Warning | DVN | 36 hr |
| Feb 5, 1:38 PM CST | Winter Weather Advisory | DVN | 29 hr |
| Feb 6, 3:47 AM CST | Wind Chill Warning | DVN | 32 hr |
| Feb 6, 3:47 AM CST | Wind Chill Advisory | DVN | 32 hr |
| Feb 8, 11:03 AM CST | Winter Weather Advisory | DVN | 12 hr |
| Feb 8, 2:48 PM CST | Wind Chill Advisory | DVN | 19 hr |
| Feb 11, 5:07 PM CST | Wind Chill Advisory | DVN | 43 hr |
| Feb 13, 3:37 AM CST | Wind Chill Warning | DVN | 56 hr |
| Feb 15, 12:10 PM CST | Wind Chill Advisory | DVN | 22 hr |
| Feb 20, 2:35 PM CST | Winter Weather Advisory | DVN | 30 hr |
| Feb 28, 6:13 AM CST | Dense Fog Advisory | DVN | 6 hr |
| Mar 10, 2:52 AM CST | Wind Advisory | DVN | 17 hr |
| Mar 16, 12:37 AM CDT | Dense Fog Advisory | DVN | 9 hr |
| Mar 17, 2:28 PM CDT | Wind Advisory | DVN | 29 hr |
| Mar 23, 6:11 PM CDT | Special Weather Statement | DVN | 64 min |
| Mar 28, 3:24 AM CDT | Fire Weather Watch | DVN | 12 hr |
| Mar 28, 2:41 PM CDT | Wind Advisory | DVN | 29 hr |
| Mar 28, 2:55 PM CDT | Red Flag Warning | DVN | 29 hr |
| Apr 7, 5:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Apr 10, 9:53 AM CDT | Wind Advisory | DVN | 14 hr |
| Apr 13, 2:47 PM CDT | Frost Advisory | DVN | 17 hr |
| Apr 14, 2:45 PM CDT | Frost Advisory | DVN | 17 hr |
| Apr 19, 3:41 AM CDT | Freeze Watch | DVN | 10 hr |
| Apr 19, 2:07 PM CDT | Freeze Warning | DVN | 43 hr |
| Apr 21, 3:07 AM CDT | Freeze Warning | DVN | 30 hr |
| May 11, 2:26 PM CDT | Frost Advisory | DVN | 17 hr |
| Jun 1, 1:18 AM CDT | Dense Fog Advisory | DVN | 8 hr |
| Jun 16, 2:51 PM CDT | Heat Advisory | DVN | 28 hr |
| Jun 18, 9:27 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 10:08 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 18, 11:21 PM CDT | Severe Thunderstorm Warning | DVN | 39 min |
| Jun 19, 12:12 AM CDT | Severe Thunderstorm Warning | DVN | 48 min |
| Jun 19, 2:10 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 4:01 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 20, 6:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 6:50 PM CDT | Special Weather Statement | DVN | 25 min |
| Jun 22, 6:57 PM CDT | Severe Thunderstorm Warning | DVN | 33 min |
| Jun 22, 9:42 PM CDT | Special Weather Statement | DVN | 48 min |
| Jun 24, 2:08 PM CDT | Flash Flood Watch | DVN | 54 hr |
| Jun 24, 7:23 PM CDT | Severe Thunderstorm Warning | DVN | 40 min |
| Jun 24, 8:13 PM CDT | Special Weather Statement | DVN | 47 min |
| Jun 24, 8:42 PM CDT | Flash Flood Warning | DVN | 6 hr |
| Jun 25, 2:49 AM CDT | Areal Flood Warning | DVN | 17 hr |
| Jun 30, 4:22 AM CDT | Dense Fog Advisory | DVN | 4 hr |
| Jul 9, 2:49 AM CDT | Flash Flood Watch | DVN | 40 hr |
| Jul 9, 5:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 9, 5:59 PM CDT | Special Weather Statement | DVN | 31 min |
| Jul 9, 7:08 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jul 9, 7:51 PM CDT | Severe Thunderstorm Warning | DVN | 24 min |
| Jul 10, 4:25 AM CDT | Special Weather Statement | DVN | 95 min |
| Jul 11, 10:56 AM CDT | Flash Flood Warning | DVN | 4 hr |
| Jul 14, 10:02 AM CDT | Special Weather Statement | DVN | 28 min |
| Jul 14, 10:28 AM CDT | Special Weather Statement | DVN | 32 min |
| Jul 15, 8:58 AM CDT | Special Weather Statement | DVN | 47 min |
| Jul 23, 3:18 AM CDT | Heat Advisory | DVN | 41 hr |
| Jul 27, 3:12 AM CDT | Heat Advisory | DVN | 64 hr |
| Aug 8, 2:24 PM CDT | Heat Advisory | DVN | 53 hr |
| Aug 10, 1:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 10, 2:08 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 2:28 PM CDT | Heat Advisory | DVN | 29 hr |
| Aug 11, 3:56 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 23, 2:45 PM CDT | Heat Advisory | DVN | 29 hr |
| Aug 25, 3:53 AM CDT | Special Weather Statement | DVN | 37 min |
| Aug 26, 3:27 AM CDT | Heat Advisory | DVN | 17 hr |
| Aug 26, 1:55 PM CDT | Special Weather Statement | DVN | 35 min |
| Aug 26, 10:57 PM CDT | Severe Thunderstorm Warning | DVN | 48 min |
| Aug 26, 11:20 PM CDT | Tornado Warning | DVN | 27 min |
| Aug 26, 11:39 PM CDT | Severe Thunderstorm Warning | DVN | 31 min |
| Sep 20, 2:07 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 20, 3:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Sep 20, 5:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Sep 20, 7:13 PM CDT | Severe Thunderstorm Warning | DVN | 47 min |
| Oct 13, 7:51 AM CDT | Special Weather Statement | DVN | 39 min |
| Oct 23, 12:53 PM CDT | Flash Flood Watch | DVN | 38 hr |
| Oct 31, 2:22 PM CDT | Freeze Warning | DVN | 19 hr |
| Nov 1, 2:14 PM CDT | Freeze Warning | DVN | 19 hr |
| Nov 14, 2:27 AM CST | Wind Advisory | DVN | 7 hr |
| Dec 13, 2:36 PM CST | High Wind Watch | DVN | 24 hr |
| Dec 14, 2:33 PM CST | High Wind Warning | DVN | 39 hr |
| Dec 15, 4:51 PM CST | Mesoscale Discussion | SPC | 114 min |
| Dec 15, 5:30 PM CST | Tornado Watch | SPC | 6 hr |
| Dec 15, 7:31 PM CST | Severe Thunderstorm Warning | DVN | 59 min |
| Dec 15, 8:18 PM CST | Severe Thunderstorm Warning | DVN | 57 min |
| Dec 15, 8:34 PM CST | Severe Thunderstorm Warning | DVN | 26 min |
| Dec 27, 2:57 PM CST | Winter Weather Advisory | DVN | 27 hr |
| Dec 28, 8:59 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Dec 30, 7:17 PM CST | Dense Fog Advisory | DVN | 23 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 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.