Alert archive / Wisconsin / Clark County
Weather alerts in Clark County, Wisconsin, 2026
114 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clark County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 114
- Warnings
- 39
- Watches
- 18
- Advisories
- 20
- Busiest month
- June30 alerts
- Busiest day
- April 17, 202610 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 5 tornado warnings covering Clark County in 2026 had a tornado report inside them.
Clark County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 1 | 80% | 0 | ||
| Severe thunderstorm warnings | 23 | 9 | 61% | 13 | 92% | 23 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS La Crosse, WI: tornado warnings | 59 | 16 | 73% | 34 | 76% | 22 min |
| NWS La Crosse, WI: severe thunderstorm warnings | 200 | 89 | 55% | 240 | 76% | 23 min |
| NWS La Crosse, WI: flash flood warnings | 16 | 7 | 56% | 21 | 76% | 142 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 4, 3:41 AM CST | Winter Weather Advisory | ARX | 20 hr |
| Jan 5, 4:10 AM CST | Winter Weather Advisory | ARX | 35 hr |
| Jan 8, 2:07 AM CST | Dense Fog Advisory | ARX | 8 hr |
| Jan 17, 1:38 PM CST | Cold Weather Advisory | ARX | 68 hr |
| Jan 20, 12:47 PM CST | Extreme Cold Watch | ARX | 46 hr |
| Jan 21, 11:56 AM CST | Extreme Cold Warning | ARX | 48 hr |
| Jan 22, 10:24 AM CST | Cold Weather Advisory | ARX | 47 hr |
| Jan 25, 1:32 AM CST | Cold Weather Advisory | ARX | 34 hr |
| Feb 19, 2:41 AM CST | Winter Weather Advisory | ARX | 32 hr |
| Mar 10, 3:26 AM CDT | Winter Weather Advisory | ARX | 31 hr |
| Mar 11, 9:15 PM CDT | Wind Advisory | ARX | 40 hr |
| Mar 12, 1:45 AM CDT | Winter Weather Advisory | ARX | 35 hr |
| Mar 12, 2:30 PM CDT | Winter Storm Watch | ARX | 46 hr |
| Mar 13, 12:28 PM CDT | Winter Storm Warning | ARX | 54 hr |
| Mar 14, 12:46 PM CDT | Blizzard Warning | ARX | 46 hr |
| Mar 14, 11:55 PM CDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 15, 5:40 AM CDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 16, 3:43 AM CDT | Winter Weather Advisory | ARX | 9 hr |
| Mar 31, 2:24 PM CDT | Winter Storm Watch | ARX | 11 hr |
| Apr 1, 1:39 AM CDT | Winter Storm Warning | ARX | 10 hr |
| Apr 1, 11:33 AM CDT | Ice Storm Warning | ARX | 25 hr |
| Apr 2, 3:55 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 3, 2:38 AM CDT | Winter Weather Advisory | ARX | 28 hr |
| Apr 13, 2:23 AM CDT | Flood Watch | ARX | 24 hr |
| Apr 13, 1:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 13, 3:11 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 13, 4:43 PM CDT | Severe Thunderstorm Warning | ARX | 17 min |
| Apr 13, 5:03 PM CDT | Severe Thunderstorm Warning | ARX | 42 min |
| Apr 13, 5:45 PM CDT | Severe Thunderstorm Warning | ARX | 24 min |
| Apr 13, 5:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 13, 6:53 PM CDT | Severe Thunderstorm Warning | ARX | 67 min |
| Apr 13, 7:37 PM CDT | Severe Thunderstorm Warning | ARX | 38 min |
| Apr 13, 7:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 14, 4:16 AM CDT | Dense Fog Advisory | ARX | 4 hr |
| Apr 17, 9:23 AM CDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Apr 17, 12:40 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 17, 2:36 PM CDT | Severe Thunderstorm Warning | ARX | 39 min |
| Apr 17, 2:45 PM CDT | Severe Thunderstorm Warning | ARX | 30 min |
| Apr 17, 2:58 PM CDT | Tornado Warning | ARX | 35 min |
| Apr 17, 4:30 PM CDT | Tornado Warning | ARX | 27 min |
| Apr 17, 4:35 PM CDT | Tornado Warning | ARX | 40 min |
| Apr 17, 5:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Apr 17, 5:13 PM CDT | Tornado Warning | ARX | 33 min |
| Apr 17, 5:24 PM CDT | Severe Thunderstorm Warning | ARX | 51 min |
| Apr 23, 6:48 PM CDT | Special Weather Statement | ARX | 27 min |
| Apr 23, 7:13 PM CDT | Special Weather Statement | ARX | 32 min |
| Apr 29, 12:56 PM CDT | Freeze Warning | ARX | 19 hr |
| Apr 30, 1:25 PM CDT | Freeze Warning | ARX | 19 hr |
| May 1, 2:25 AM CDT | Freeze Warning | ARX | 30 hr |
| May 5, 1:08 PM CDT | Freeze Warning | ARX | 19 hr |
| May 6, 1:09 PM CDT | Frost Advisory | ARX | 19 hr |
| May 7, 12:58 PM CDT | Frost Advisory | ARX | 19 hr |
| May 9, 1:25 PM CDT | Frost Advisory | ARX | 19 hr |
| May 10, 12:00 PM CDT | Freeze Warning | ARX | 20 hr |
| May 13, 12:54 PM CDT | Frost Advisory | ARX | 18 hr |
| May 15, 5:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 17, 11:29 PM CDT | Severe Thunderstorm Warning | ARX | 18 min |
| May 18, 9:57 PM CDT | Special Weather Statement | ARX | 63 min |
| May 26, 5:30 PM CDT | Special Weather Statement | ARX | 30 min |
| May 27, 3:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| May 27, 5:49 PM CDT | Severe Thunderstorm Warning | ARX | 56 min |
| May 27, 6:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 5, 2:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 5, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 5, 5:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 5, 5:59 PM CDT | Special Weather Statement | ARX | 31 min |
| Jun 10, 5:48 AM CDT | Severe Thunderstorm Warning | ARX | 42 min |
| Jun 10, 6:07 AM CDT | Severe Thunderstorm Warning | ARX | 38 min |
| Jun 10, 6:18 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 10, 6:21 AM CDT | Severe Thunderstorm Warning | ARX | 24 min |
| Jun 10, 6:42 AM CDT | Severe Thunderstorm Warning | ARX | 33 min |
| Jun 10, 7:34 AM CDT | Special Weather Statement | ARX | 26 min |
| Jun 10, 7:40 AM CDT | Severe Thunderstorm Warning | ARX | 20 min |
| Jun 10, 12:00 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 10, 1:50 PM CDT | Severe Thunderstorm Warning | ARX | 55 min |
| Jun 10, 2:08 PM CDT | Severe Thunderstorm Warning | ARX | 67 min |
| Jun 10, 9:43 PM CDT | Special Weather Statement | ARX | 32 min |
| Jun 11, 2:47 AM CDT | Flood Watch | ARX | 15 hr |
| Jun 19, 6:25 PM CDT | Severe Thunderstorm Warning | ARX | 50 min |
| Jun 19, 6:44 PM CDT | Severe Thunderstorm Warning | ARX | 46 min |
| Jun 24, 12:44 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 24, 1:30 PM CDT | Severe Thunderstorm Warning | ARX | 60 min |
| Jun 24, 1:55 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 24, 2:20 PM CDT | Severe Thunderstorm Warning | ARX | 25 min |
| Jun 24, 4:35 PM CDT | Special Weather Statement | ARX | 25 min |
| Jun 27, 1:27 AM CDT | Extreme Heat Watch | ARX | 23 hr |
| Jun 28, 12:34 AM CDT | Extreme Heat Warning | ARX | 68 hr |
| Jun 30, 2:59 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 30, 7:54 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 30, 7:56 AM CDT | Severe Thunderstorm Warning | ARX | 64 min |
| Jun 30, 2:51 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 3:19 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 1, 6:59 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 1, 6:51 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 8, 1:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 1:59 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 12, 1:33 PM CDT | Heat Advisory | ARX | 3 days |
| Jul 20, 1:53 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 2:51 AM CDT | Extreme Heat Watch | ARX | 47 hr |
| Jul 25, 2:20 AM CDT | Heat Advisory | ARX | 67 hr |
| Jul 26, 8:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 26, 11:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 9, 9:28 PM CDT | Special Weather Statement | ARX | 32 min |
| Aug 10, 5:00 AM CDT | Dense Fog Advisory | ARX | 4 hr |
| Aug 11, 10:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 11, 10:24 PM CDT | Special Weather Statement | ARX | 36 min |
| Aug 11, 11:11 PM CDT | Special Weather Statement | ARX | 34 min |
| Aug 12, 12:14 AM CDT | Special Weather Statement | ARX | 31 min |
| Aug 12, 12:21 AM CDT | Severe Thunderstorm Warning | ARX | 9 min |
| Sep 2, 12:45 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 3, 7:52 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Sep 3, 7:26 PM CDT | Special Weather Statement | ARX | 19 min |
| Sep 4, 6:29 PM CDT | Tornado Warning | ARX | 14 min |
| Sep 4, 6:42 PM CDT | Special Weather Statement | ARX | 33 min |
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 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.