Alert archive / Illinois / Jo Daviess County
Weather alerts in Jo Daviess County, Illinois, 2023
135 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jo Daviess County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 135
- Warnings
- 50
- Watches
- 16
- Advisories
- 33
- Busiest month
- April35 alerts
- Busiest day
- March 31, 202312 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 5 tornado warnings covering Jo Daviess County in 2023 had a tornado report inside them.
Jo Daviess County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 2 | 60% | 0 | ||
| Severe thunderstorm warnings | 24 | 20 | 17% | 12 | 83% | 21 min |
| Flash flood warnings | 3 | 0 | 100% | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Quad Cities, IA: tornado warnings | 62 | 26 | 58% | 67 | 67% | 15 min |
| NWS Quad Cities, IA: severe thunderstorm warnings | 233 | 149 | 36% | 582 | 87% | 25 min |
| NWS Quad Cities, IA: flash flood warnings | 15 | 3 | 80% | 10 | 80% | 170 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 1, 5:52 AM CST | Dense Fog Advisory | DVN | 5 hr |
| Jan 3, 5:14 AM CST | Dense Fog Advisory | DVN | 17 hr |
| Jan 8, 4:34 AM CST | Dense Fog Advisory | DVN | 7 hr |
| Jan 18, 2:51 AM CST | Winter Weather Advisory | DVN | 30 hr |
| Jan 19, 7:44 AM CST | Dense Fog Advisory | DVN | 3 hr |
| Jan 24, 1:54 AM CST | Winter Weather Advisory | DVN | 36 hr |
| Jan 27, 3:05 AM CST | Winter Weather Advisory | DVN | 51 hr |
| Jan 30, 2:22 PM CST | Wind Chill Advisory | DVN | 19 hr |
| Feb 2, 2:51 AM CST | Wind Chill Advisory | DVN | 31 hr |
| Feb 7, 2:23 PM CST | Winter Storm Watch | DVN | 24 hr |
| Feb 8, 2:45 PM CST | Winter Storm Warning | DVN | 26 hr |
| Feb 8, 2:45 PM CST | Winter Weather Advisory | DVN | 26 hr |
| Feb 9, 9:48 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 14, 2:08 PM CST | Winter Storm Watch | DVN | 13 hr |
| Feb 15, 3:18 AM CST | Winter Storm Warning | DVN | 42 hr |
| Feb 16, 8:02 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 21, 2:10 PM CST | Ice Storm Warning | DVN | 36 hr |
| Feb 21, 2:10 PM CST | Winter Weather Advisory | DVN | 46 hr |
| Feb 22, 8:46 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Mar 4, 10:26 PM CST | Dense Fog Advisory | DVN | 9 hr |
| Mar 7, 2:33 PM CST | Winter Storm Watch | DVN | 25 hr |
| Mar 8, 3:04 PM CST | Winter Storm Warning | DVN | 37 hr |
| Mar 24, 2:56 AM CDT | Winter Weather Advisory | DVN | 32 hr |
| Mar 25, 2:32 AM CDT | Winter Storm Warning | DVN | 10 hr |
| Mar 25, 3:47 AM CDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 26, 9:52 PM CDT | Dense Fog Advisory | DVN | 7 hr |
| Mar 31, 3:11 AM CDT | Wind Advisory | DVN | 34 hr |
| Mar 31, 11:24 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Mar 31, 11:46 AM CDT | Tornado Watch | SPC | 8 hr |
| Mar 31, 2:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Mar 31, 5:18 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Mar 31, 5:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 5:44 PM CDT | Severe Thunderstorm Warning | DVN | 61 min |
| Mar 31, 6:10 PM CDT | Tornado Warning | DVN | 35 min |
| Mar 31, 6:12 PM CDT | Tornado Warning | DVN | 32 min |
| Mar 31, 6:18 PM CDT | Severe Thunderstorm Warning | DVN | 27 min |
| Mar 31, 6:41 PM CDT | Tornado Warning | DVN | 37 min |
| Mar 31, 6:48 PM CDT | Severe Thunderstorm Warning | DVN | 42 min |
| Apr 4, 8:00 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 4, 2:48 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 4, 6:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Apr 4, 6:34 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 4, 8:49 PM CDT | Severe Thunderstorm Warning | DVN | 26 min |
| Apr 4, 9:09 PM CDT | Severe Thunderstorm Warning | DVN | 36 min |
| Apr 5, 1:57 AM CDT | Special Weather Statement | DVN | 33 min |
| Apr 5, 4:22 AM CDT | Special Weather Statement | DVN | 38 min |
| Apr 5, 5:01 AM CDT | Severe Thunderstorm Warning | DVN | 26 min |
| Apr 12, 2:48 AM CDT | Red Flag Warning | DVN | 17 hr |
| Apr 12, 2:27 PM CDT | Red Flag Warning | DVN | 30 hr |
| Apr 14, 11:57 AM CDT | River Flood Warning | DVN | 32 days |
| Apr 14, 12:00 PM CDT | River Flood Warning | DVN | 28 days |
| Apr 15, 3:17 PM CDT | Freeze Watch | DVN | 11 hr |
| Apr 15, 3:17 PM CDT | Wind Advisory | DVN | 48 hr |
| Apr 15, 3:19 PM CDT | Winter Weather Advisory | DVN | 40 hr |
| Apr 17, 12:41 PM CDT | River Flood Warning | DVN | 23 days |
| Apr 17, 3:00 PM CDT | Freeze Warning | DVN | 17 hr |
| Apr 19, 10:53 AM CDT | Severe Thunderstorm Warning | DVN | 37 min |
| Apr 19, 11:24 AM CDT | Severe Thunderstorm Warning | DVN | 36 min |
| Apr 19, 11:25 AM CDT | Severe Thunderstorm Warning | DVN | 35 min |
| Apr 19, 11:26 AM CDT | Severe Thunderstorm Warning | DVN | 19 min |
| Apr 19, 11:46 AM CDT | Severe Thunderstorm Warning | DVN | 29 min |
| Apr 19, 2:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 20, 3:05 AM CDT | Special Weather Statement | DVN | 25 min |
| Apr 20, 1:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Apr 20, 2:06 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 20, 3:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 21, 3:01 AM CDT | Freeze Watch | DVN | 48 hr |
| Apr 21, 1:51 PM CDT | Freeze Warning | DVN | 19 hr |
| Apr 22, 3:03 PM CDT | Freeze Warning | DVN | 17 hr |
| Apr 23, 2:50 AM CDT | Freeze Warning | DVN | 29 hr |
| Apr 24, 2:15 PM CDT | Freeze Watch | DVN | 23 hr |
| Apr 25, 1:32 PM CDT | Freeze Warning | DVN | 18 hr |
| Apr 26, 2:39 PM CDT | Frost Advisory | DVN | 17 hr |
| May 1, 8:52 AM CDT | Wind Advisory | DVN | 10 hr |
| May 7, 4:10 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 24, 5:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 24, 6:28 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 24, 8:36 PM CDT | Severe Thunderstorm Warning | DVN | 39 min |
| Jun 24, 8:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 24, 9:12 PM CDT | Severe Thunderstorm Warning | DVN | 48 min |
| Jun 24, 9:55 PM CDT | Severe Thunderstorm Warning | DVN | 50 min |
| Jul 5, 12:59 PM CDT | Severe Thunderstorm Warning | DVN | 46 min |
| Jul 5, 1:14 PM CDT | Severe Thunderstorm Warning | DVN | 46 min |
| Jul 12, 3:35 AM CDT | Special Weather Statement | DVN | 40 min |
| Jul 13, 5:22 PM CDT | Special Weather Statement | DVN | 38 min |
| Jul 13, 7:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jul 14, 2:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 3:52 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 14, 6:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 25, 1:54 PM CDT | Heat Advisory | DVN | 3 days |
| Jul 26, 6:54 AM CDT | Special Weather Statement | DVN | 36 min |
| Jul 26, 7:28 AM CDT | Severe Thunderstorm Warning | DVN | 32 min |
| Jul 26, 7:30 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 28, 2:24 AM CDT | Special Weather Statement | DVN | 66 min |
| Jul 28, 7:21 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 7:22 PM CDT | Severe Thunderstorm Warning | DVN | 12 min |
| Jul 28, 7:29 PM CDT | Severe Thunderstorm Warning | DVN | 46 min |
| Jul 28, 7:30 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 28, 7:41 PM CDT | Severe Thunderstorm Warning | DVN | 29 min |
| Jul 28, 7:48 PM CDT | Tornado Warning | DVN | 27 min |
| Jul 28, 8:09 PM CDT | Severe Thunderstorm Warning | DVN | 51 min |
| Jul 28, 8:13 PM CDT | Severe Thunderstorm Warning | DVN | 47 min |
| Jul 28, 8:32 PM CDT | Severe Thunderstorm Warning | DVN | 43 min |
| Jul 28, 8:35 PM CDT | Tornado Warning | DVN | 40 min |
| Jul 28, 8:57 PM CDT | Severe Thunderstorm Warning | DVN | 48 min |
| Jul 28, 9:09 PM CDT | Flash Flood Warning | DVN | 3 hr |
| Aug 2, 9:41 PM CDT | Dense Fog Advisory | DVN | 11 hr |
| Aug 9, 11:23 PM CDT | Dense Fog Advisory | DVN | 10 hr |
| Aug 14, 2:01 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 14, 4:14 PM CDT | Special Weather Statement | DVN | 61 min |
| Aug 18, 2:58 AM CDT | Excessive Heat Watch | DVN | 72 hr |
| Aug 19, 3:01 AM CDT | Excessive Heat Warning | DVN | 7 days |
| Aug 19, 3:01 AM CDT | Heat Advisory | DVN | 41 hr |
| Aug 21, 2:46 AM CDT | Excessive Heat Watch | DVN | 24 hr |
| Sep 26, 1:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Sep 26, 3:09 PM CDT | Special Weather Statement | DVN | 36 min |
| Sep 26, 3:51 PM CDT | Special Weather Statement | DVN | 39 min |
| Sep 26, 7:37 PM CDT | Flash Flood Warning | DVN | 6 hr |
| Sep 26, 8:26 PM CDT | Special Weather Statement | DVN | 49 min |
| Sep 26, 9:29 PM CDT | Special Weather Statement | DVN | 46 min |
| Sep 26, 10:15 PM CDT | Flash Flood Warning | DVN | 3 hr |
| Oct 6, 1:13 PM CDT | Special Weather Statement | DVN | 47 min |
| Oct 8, 1:52 PM CDT | Frost Advisory | DVN | 19 hr |
| Oct 9, 1:52 PM CDT | Frost Advisory | DVN | 19 hr |
| Oct 10, 2:57 PM CDT | Frost Advisory | DVN | 18 hr |
| Oct 27, 2:44 AM CDT | Freeze Warning | DVN | 29 hr |
| Oct 29, 2:38 AM CDT | Freeze Warning | DVN | 31 hr |
| Oct 31, 10:34 AM CDT | Wind Advisory | DVN | 6 hr |
| Nov 25, 3:21 AM CST | Winter Weather Advisory | DVN | 33 hr |
| Dec 5, 6:12 AM CST | Special Weather Statement | DVN | 2 hr |
| Dec 22, 6:23 PM CST | Dense Fog Advisory | DVN | 18 hr |
| Dec 23, 4:15 PM CST | Dense Fog Advisory | DVN | 20 hr |
| Dec 28, 5:59 AM CST | Winter Weather Advisory | DVN | 18 hr |
| Dec 30, 2:02 AM CST | Dense Fog Advisory | DVN | 8 hr |
| Dec 30, 5:56 PM CST | Winter Weather Advisory | DVN | 18 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 | 24 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 14 |
| Flooding | |
| Flash Flood Warning | 3 |
| River Flood Warning | 3 |
| Winter | |
| Ice Storm Warning | 1 |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 10 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 2 |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 3 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 11 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.