Alert archive / Illinois / Stephenson County
Weather alerts in Stephenson County, Illinois, 2020
107 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Stephenson County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 107
- Warnings
- 21
- Watches
- 15
- Advisories
- 33
- Busiest month
- July15 alerts
- Busiest day
- August 10, 20207 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 9, 11:21 AM CST | Winter Storm Watch | DVN | 16 hr |
| Jan 10, 3:17 AM CST | Winter Storm Warning | DVN | 43 hr |
| Jan 10, 5:50 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 14, 2:11 PM CST | Winter Weather Advisory | DVN | 24 hr |
| Jan 15, 3:43 PM CST | Winter Storm Watch | DVN | 23 hr |
| Jan 16, 2:17 PM CST | Winter Weather Advisory | DVN | 52 hr |
| Jan 18, 3:13 PM CST | Wind Chill Advisory | DVN | 21 hr |
| Jan 24, 1:05 PM CST | Winter Weather Advisory | DVN | 23 hr |
| Feb 8, 3:03 AM CST | Winter Weather Advisory | DVN | 36 hr |
| Feb 11, 3:00 PM CST | Winter Weather Advisory | DVN | 45 hr |
| Feb 13, 10:05 AM CST | Wind Chill Advisory | DVN | 24 hr |
| Feb 23, 10:35 AM CST | Winter Storm Watch | DVN | 28 hr |
| Mar 4, 2:55 PM CST | Wind Advisory | DVN | 36 hr |
| Mar 25, 4:41 AM CDT | Dense Fog Advisory | DVN | 5 hr |
| Mar 28, 4:15 PM CDT | Special Weather Statement | DVN | 30 min |
| Mar 28, 6:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Mar 28, 9:26 PM CDT | Wind Advisory | DVN | 22 hr |
| Apr 7, 5:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 7, 5:26 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 7, 5:55 PM CDT | Severe Thunderstorm Warning | DVN | 50 min |
| Apr 7, 6:53 PM CDT | Special Weather Statement | DVN | 37 min |
| Apr 7, 7:18 PM CDT | Severe Thunderstorm Warning | DVN | 27 min |
| Apr 7, 7:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Apr 8, 4:22 AM CDT | Dense Fog Advisory | DVN | 5 hr |
| Apr 9, 2:52 AM CDT | Wind Advisory | DVN | 16 hr |
| Apr 12, 3:42 AM CDT | Wind Advisory | DVN | 36 hr |
| Apr 20, 5:46 PM CDT | Special Weather Statement | DVN | 59 min |
| May 7, 4:00 AM CDT | Freeze Watch | DVN | 23 hr |
| May 8, 3:16 AM CDT | Freeze Warning | DVN | 29 hr |
| May 10, 2:36 PM CDT | Frost Advisory | DVN | 16 hr |
| May 11, 2:02 PM CDT | Frost Advisory | DVN | 18 hr |
| May 14, 11:38 AM CDT | Flash Flood Watch | DVN | 19 hr |
| May 23, 11:29 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 23, 12:33 PM CDT | Tornado Watch | SPC | 8 hr |
| May 23, 2:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| May 23, 4:02 PM CDT | Severe Thunderstorm Warning | DVN | 58 min |
| May 26, 6:03 PM CDT | Severe Thunderstorm Warning | DVN | 27 min |
| May 26, 6:27 PM CDT | Severe Thunderstorm Warning | DVN | 33 min |
| May 26, 6:41 PM CDT | Severe Thunderstorm Warning | DVN | 19 min |
| May 26, 6:42 PM CDT | Severe Thunderstorm Warning | DVN | 18 min |
| May 27, 6:24 PM CDT | Special Weather Statement | DVN | 36 min |
| Jun 3, 2:15 AM CDT | Special Weather Statement | DVN | 60 min |
| Jun 3, 2:55 AM CDT | Special Weather Statement | DVN | 50 min |
| Jun 5, 12:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 9, 2:50 PM CDT | Special Weather Statement | DVN | 25 min |
| Jun 26, 12:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 1:38 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 26, 3:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 5:16 PM CDT | Severe Thunderstorm Warning | DVN | 29 min |
| Jun 26, 5:42 PM CDT | Severe Thunderstorm Warning | DVN | 48 min |
| Jun 26, 6:00 PM CDT | Tornado Warning | DVN | 30 min |
| Jul 7, 2:38 PM CDT | Heat Advisory | DVN | 28 hr |
| Jul 8, 2:03 PM CDT | Special Weather Statement | DVN | 27 min |
| Jul 8, 3:01 PM CDT | Special Weather Statement | DVN | 29 min |
| Jul 9, 2:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 9, 3:39 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 9, 5:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 15, 2:50 AM CDT | Special Weather Statement | DVN | 40 min |
| Jul 17, 3:04 AM CDT | Heat Advisory | DVN | 41 hr |
| Jul 18, 10:27 AM CDT | Special Weather Statement | DVN | 48 min |
| Jul 18, 11:00 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 11:01 AM CDT | Special Weather Statement | DVN | 59 min |
| Jul 18, 11:03 AM CDT | Severe Thunderstorm Warning | DVN | 42 min |
| Jul 18, 11:44 AM CDT | Special Weather Statement | DVN | 31 min |
| Jul 25, 2:30 AM CDT | Heat Advisory | DVN | 41 hr |
| Jul 26, 5:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 9, 1:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 5:23 PM CDT | Special Weather Statement | DVN | 7 min |
| Aug 10, 10:42 AM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 10, 11:26 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 10, 1:20 PM CDT | Severe Thunderstorm Warning | DVN | 55 min |
| Aug 10, 1:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 10, 2:04 PM CDT | Severe Thunderstorm Warning | DVN | 26 min |
| Aug 10, 2:15 PM CDT | Severe Thunderstorm Warning | DVN | 30 min |
| Aug 10, 2:25 PM CDT | Severe Thunderstorm Warning | DVN | 20 min |
| Aug 15, 9:00 AM CDT | Special Weather Statement | DVN | 60 min |
| Aug 24, 12:18 PM CDT | Heat Advisory | DVN | 7 hr |
| Aug 25, 3:07 AM CDT | Heat Advisory | DVN | 16 hr |
| Aug 28, 2:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Aug 28, 3:16 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 28, 5:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Sep 6, 1:57 AM CDT | Severe Thunderstorm Warning | DVN | 29 min |
| Sep 6, 2:53 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 6, 5:30 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Oct 1, 3:49 AM CDT | Frost Advisory | DVN | 28 hr |
| Oct 4, 2:54 AM CDT | Frost Advisory | DVN | 29 hr |
| Oct 14, 4:19 AM CDT | Wind Advisory | DVN | 15 hr |
| Oct 15, 3:15 AM CDT | Freeze Warning | DVN | 29 hr |
| Oct 16, 1:43 PM CDT | Wind Advisory | DVN | 28 hr |
| Oct 22, 3:34 PM CDT | Dense Fog Advisory | DVN | 11 min |
| Oct 22, 3:45 PM CDT | Dense Fog Advisory | DVN | 6 hr |
| Oct 22, 4:53 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 1, 12:46 AM CDT | Wind Advisory | DVN | 14 hr |
| Nov 10, 2:41 AM CST | Wind Advisory | DVN | 17 hr |
| Nov 10, 11:22 AM CST | Severe Thunderstorm Watch | SPC | 7 hr |
| Nov 10, 1:28 PM CST | Mesoscale Discussion | SPC | 92 min |
| Nov 10, 1:48 PM CST | Mesoscale Discussion | SPC | 87 min |
| Nov 10, 2:05 PM CST | Tornado Watch | SPC | 6 hr |
| Nov 10, 3:19 PM CST | Severe Thunderstorm Warning | DVN | 24 min |
| Nov 14, 3:35 AM CST | Wind Advisory | DVN | 38 hr |
| Nov 23, 2:04 PM CST | Winter Weather Advisory | DVN | 19 hr |
| Nov 24, 9:16 PM CST | Dense Fog Advisory | DVN | 11 hr |
| Dec 11, 2:08 AM CST | Winter Weather Advisory | DVN | 36 hr |
| Dec 23, 3:43 AM CST | Wind Advisory | DVN | 23 hr |
| Dec 28, 3:19 AM CST | Winter Storm Watch | DVN | 17 hr |
| Dec 28, 3:15 PM CST | Winter Storm Warning | DVN | 38 hr |
| Dec 29, 2:17 PM CST | Mesoscale Discussion | SPC | 4 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 | 16 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 23 |
| Special Weather Statement | 15 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 7 |
| Heat | |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 10 |
| 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 archive20192021
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.