Alert archive / Wisconsin / Eau Claire County
Weather alerts in Eau Claire County, Wisconsin, 2021
92 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Eau Claire County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 92
- Warnings
- 17
- Watches
- 13
- Advisories
- 31
- Busiest month
- December15 alerts
- Busiest day
- July 29, 20215 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado reports fell inside a warning.
Eau Claire County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 1 | 0% | |||
| Severe thunderstorm warnings | 10 | 7 | 30% | 19 | 84% | 12 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 68 min |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Twin Cities, MN: tornado warnings | 27 | 7 | 74% | 33 | 36% | 11 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 144 | 77 | 47% | 283 | 69% | 20 min |
| NWS Twin Cities, MN: flash flood warnings | 5 | 1 | 80% | 1 | 100% | 68 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 2, 1:57 PM CST | Dense Fog Advisory | MPX | 22 hr |
| Jan 3, 2:47 PM CST | Dense Fog Advisory | MPX | 21 hr |
| Jan 4, 8:44 PM CST | Dense Fog Advisory | MPX | 13 hr |
| Jan 5, 1:55 PM CST | Dense Fog Advisory | MPX | 19 hr |
| Jan 13, 10:37 AM CST | Winter Storm Watch | MPX | 17 hr |
| Jan 14, 3:37 AM CST | Winter Weather Advisory | MPX | 38 hr |
| Jan 22, 2:26 PM CST | Winter Weather Advisory | MPX | 40 hr |
| Feb 3, 3:22 AM CST | Winter Storm Watch | MPX | 11 hr |
| Feb 3, 2:49 PM CST | Winter Weather Advisory | MPX | 30 hr |
| Feb 5, 3:16 AM CST | Wind Chill Advisory | MPX | 5 days |
| Feb 7, 2:24 PM CST | Wind Chill Advisory | MPX | 20 hr |
| Feb 8, 1:32 PM CST | Wind Chill Advisory | MPX | 20 hr |
| Feb 9, 1:57 PM CST | Wind Chill Advisory | MPX | 20 hr |
| Feb 10, 2:05 PM CST | Wind Chill Advisory | MPX | 19 hr |
| Feb 11, 2:09 PM CST | Wind Chill Advisory | MPX | 52 hr |
| Feb 12, 2:20 PM CST | Wind Chill Watch | MPX | 38 hr |
| Feb 13, 3:43 AM CST | Wind Chill Warning | MPX | 56 hr |
| Feb 14, 3:51 AM CST | Wind Chill Advisory | MPX | 14 hr |
| Feb 15, 2:55 AM CST | Wind Chill Advisory | MPX | 30 hr |
| Feb 27, 3:54 AM CST | Winter Weather Advisory | MPX | 32 hr |
| Mar 10, 3:40 AM CST | Wind Advisory | MPX | 23 hr |
| Mar 10, 1:32 PM CST | Mesoscale Discussion | SPC | 118 min |
| Mar 14, 3:28 AM CDT | Winter Weather Advisory | MPX | 43 hr |
| Mar 28, 2:37 PM CDT | Wind Advisory | MPX | 30 hr |
| Apr 27, 11:05 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 4, 2:15 PM CDT | Frost Advisory | MPX | 18 hr |
| May 5, 2:42 PM CDT | Frost Advisory | MPX | 17 hr |
| May 7, 1:50 PM CDT | Freeze Warning | MPX | 18 hr |
| May 10, 2:42 PM CDT | Freeze Warning | MPX | 17 hr |
| May 11, 2:12 PM CDT | Frost Advisory | MPX | 17 hr |
| May 25, 2:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 2:53 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 25, 4:49 PM CDT | Special Weather Statement | MPX | 41 min |
| May 25, 5:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| May 28, 10:14 AM CDT | Freeze Warning | MPX | 21 hr |
| May 31, 4:35 PM CDT | Special Weather Statement | MPX | 25 min |
| May 31, 4:58 PM CDT | Special Weather Statement | MPX | 32 min |
| Jun 10, 2:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 11, 11:34 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 17, 4:12 AM CDT | Special Weather Statement | MPX | 33 min |
| Jun 17, 6:18 PM CDT | Severe Thunderstorm Warning | MPX | 27 min |
| Jun 17, 6:20 PM CDT | Severe Thunderstorm Warning | MPX | 55 min |
| Jun 17, 6:40 PM CDT | Severe Thunderstorm Warning | MPX | 35 min |
| Jun 17, 7:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 17, 7:22 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 17, 8:34 PM CDT | Severe Thunderstorm Warning | MPX | 56 min |
| Jun 17, 9:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 20, 1:42 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 3:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 24, 4:20 PM CDT | Severe Thunderstorm Warning | MPX | 27 min |
| Jun 29, 1:39 PM CDT | Special Weather Statement | MPX | 21 min |
| Jul 6, 1:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 6, 2:01 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 6, 2:49 PM CDT | Special Weather Statement | MPX | 41 min |
| Jul 6, 3:20 PM CDT | Severe Thunderstorm Warning | MPX | 10 min |
| Jul 27, 3:36 PM CDT | Heat Advisory | MPX | 29 hr |
| Jul 28, 7:17 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 28, 8:59 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Jul 28, 9:30 PM CDT | Severe Thunderstorm Warning | MPX | 60 min |
| Jul 28, 9:51 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jul 28, 10:18 PM CDT | Severe Thunderstorm Warning | MPX | 42 min |
| Jul 31, 1:06 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 6:08 PM CDT | Flash Flood Watch | MPX | 25 hr |
| Aug 7, 6:17 PM CDT | Flash Flood Warning | MPX | 4 hr |
| Aug 11, 7:27 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 24, 6:00 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Aug 24, 6:50 AM CDT | Severe Thunderstorm Warning | MPX | 25 min |
| Aug 24, 7:10 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 24, 7:13 AM CDT | Special Weather Statement | MPX | 32 min |
| Aug 26, 3:47 PM CDT | Special Weather Statement | MPX | 58 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 |
| Oct 8, 9:30 PM CDT | Dense Fog Advisory | MPX | 12 hr |
| Oct 17, 2:25 PM CDT | Frost Advisory | MPX | 18 hr |
| Oct 20, 2:11 PM CDT | Special Weather Statement | MPX | 49 min |
| Nov 13, 1:13 PM CST | Winter Weather Advisory | MPX | 14 hr |
| Dec 5, 3:12 AM CST | Wind Advisory | MPX | 30 hr |
| Dec 8, 3:06 AM CST | Winter Storm Watch | MPX | 33 hr |
| Dec 9, 11:52 AM CST | Winter Storm Warning | MPX | 42 hr |
| Dec 10, 3:31 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 10, 7:04 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 14, 3:27 AM CST | High Wind Watch | MPX | 13 hr |
| Dec 14, 4:06 PM CST | High Wind Warning | MPX | 38 hr |
| Dec 15, 3:34 AM CST | Dense Fog Advisory | MPX | 11 hr |
| Dec 15, 5:30 PM CST | Tornado Watch | SPC | 6 hr |
| Dec 15, 8:31 PM CST | Severe Thunderstorm Warning | MPX | 44 min |
| Dec 15, 9:03 PM CST | Mesoscale Discussion | SPC | 117 min |
| Dec 24, 6:17 PM CST | Dense Fog Advisory | MPX | 6 hr |
| Dec 26, 3:24 AM CST | Winter Weather Advisory | MPX | 36 hr |
| Dec 26, 5:26 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 27, 2:57 PM CST | Winter Weather Advisory | MPX | 32 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 | 10 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 9 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Wind Chill Watch | 1 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 8 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
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. Warning verification from the Mesonet's Cow. Rebuilt daily.