Alert archive / Wisconsin / Eau Claire County
Weather alerts in Eau Claire County, Wisconsin, 2011
147 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 147
- Warnings
- 18
- Watches
- 29
- Advisories
- 40
- Busiest month
- July43 alerts
- Busiest day
- April 10, 20119 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 3 tornado warnings covering Eau Claire County in 2011 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 10 minutes after it went out.
Eau Claire County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 3 | 100% | 10 min |
| Severe thunderstorm warnings | 8 | 4 | 50% | 8 | 25% | 47 min |
| Flash flood warnings | 2 | 1 | 50% | 2 | 100% | 3 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Twin Cities, MN: tornado warnings | 44 | 10 | 77% | 29 | 76% | 10 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 258 | 128 | 50% | 450 | 75% | 29 min |
| NWS Twin Cities, MN: flash flood warnings | 16 | 6 | 63% | 23 | 48% | 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 19, 3:46 PM CST | Wind Chill Advisory | MPX | 44 hr |
| Jan 28, 2:48 AM CST | Winter Weather Advisory | MPX | 21 hr |
| Jan 30, 4:01 AM CST | Winter Weather Advisory | MPX | 65 hr |
| Feb 5, 8:22 AM CST | Dense Fog Advisory | MPX | 4 hr |
| Feb 7, 3:35 AM CST | Wind Chill Advisory | MPX | 56 hr |
| Feb 8, 11:58 AM CST | Wind Chill Advisory | MPX | 24 hr |
| Feb 16, 6:36 PM CST | Dense Fog Advisory | MPX | 17 hr |
| Feb 18, 3:01 AM CST | Wind Advisory | MPX | 8 hr |
| Feb 18, 4:11 AM CST | Winter Storm Watch | MPX | 24 hr |
| Feb 19, 4:13 AM CST | Winter Storm Warning | MPX | 54 hr |
| Feb 21, 4:23 AM CST | Winter Weather Advisory | MPX | 14 hr |
| Mar 7, 3:59 AM CST | Winter Storm Watch | MPX | 24 hr |
| Mar 8, 3:59 AM CST | Winter Weather Advisory | MPX | 33 hr |
| Mar 11, 12:00 AM CST | Dense Fog Advisory | MPX | 9 hr |
| Mar 16, 1:56 AM CDT | Dense Fog Advisory | MPX | 7 hr |
| Mar 19, 1:10 PM CDT | River Flood Watch | MPX | 23 hr |
| Mar 20, 12:20 PM CDT | River Flood Warning | MPX | 3 days |
| Mar 20, 3:32 PM CDT | Dense Fog Advisory | MPX | 9 hr |
| Mar 21, 3:30 PM CDT | Flood Watch | MPX | 31 hr |
| Mar 22, 12:33 PM CDT | Winter Weather Advisory | MPX | 30 hr |
| Mar 22, 3:49 PM CDT | Mesoscale Discussion | SPC | 5 hr |
| Apr 9, 7:42 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 10, 1:26 AM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 10, 1:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 10, 3:19 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 10, 4:09 PM CDT | Severe Thunderstorm Warning | MPX | 51 min |
| Apr 10, 4:19 PM CDT | Severe Thunderstorm Warning | MPX | 41 min |
| Apr 10, 4:41 PM CDT | Tornado Warning | MPX | 49 min |
| Apr 10, 4:52 PM CDT | Tornado Warning | MPX | 23 min |
| Apr 10, 5:14 PM CDT | Tornado Warning | MPX | 16 min |
| Apr 15, 6:13 AM CDT | Wind Advisory | MPX | 13 hr |
| Apr 18, 4:09 AM CDT | Winter Storm Watch | MPX | 12 hr |
| Apr 18, 3:41 PM CDT | Winter Weather Advisory | MPX | 28 hr |
| May 9, 6:36 AM CDT | Special Weather Statement | MPX | 114 min |
| May 9, 8:21 AM CDT | Special Weather Statement | MPX | 54 min |
| May 9, 12:50 PM CDT | High Wind Warning | MPX | 3 hr |
| May 9, 2:31 PM CDT | Special Weather Statement | MPX | 59 min |
| May 9, 3:21 PM CDT | Special Weather Statement | MPX | 54 min |
| May 9, 3:47 PM CDT | Special Weather Statement | MPX | 58 min |
| May 10, 5:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| May 10, 8:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| May 11, 9:51 AM CDT | Special Weather Statement | MPX | 54 min |
| May 11, 11:01 AM CDT | Special Weather Statement | MPX | 74 min |
| May 12, 1:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 12, 1:41 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 15, 2:28 PM CDT | Frost Advisory | MPX | 17 hr |
| May 16, 5:53 PM CDT | Frost Advisory | MPX | 13 hr |
| May 22, 4:41 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 12:07 PM CDT | Tornado Watch | SPC | 7 hr |
| May 22, 2:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 3:44 PM CDT | Special Weather Statement | MPX | 46 min |
| May 26, 3:42 PM CDT | Frost Advisory | MPX | 16 hr |
| May 28, 2:11 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 28, 5:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| May 28, 6:45 PM CDT | Special Weather Statement | MPX | 30 min |
| May 30, 2:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 3, 3:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 3, 5:10 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 6, 2:09 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 6, 3:24 PM CDT | Heat Advisory | MPX | 29 hr |
| Jun 8, 2:02 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 11:58 AM CDT | Flood Watch | MPX | 20 hr |
| Jun 18, 7:09 PM CDT | Areal Flood Advisory | MPX | 5 hr |
| Jun 18, 8:19 PM CDT | Areal Flood Advisory | MPX | 4 hr |
| Jun 18, 8:20 PM CDT | Severe Thunderstorm Warning | MPX | 25 min |
| Jun 18, 8:49 PM CDT | Severe Thunderstorm Warning | MPX | 56 min |
| Jun 18, 8:57 PM CDT | Flash Flood Warning | MPX | 6 hr |
| Jun 19, 3:14 AM CDT | Areal Flood Advisory | MPX | 3 hr |
| Jun 21, 4:13 AM CDT | Areal Flood Advisory | MPX | 119 min |
| Jun 21, 11:45 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 21, 2:11 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 27, 3:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 30, 4:25 AM CDT | Heat Advisory | MPX | 40 hr |
| Jul 1, 2:08 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 1, 7:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jul 1, 9:30 PM CDT | Severe Thunderstorm Warning | MPX | 75 min |
| Jul 1, 10:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 10, 6:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| Jul 10, 7:28 AM CDT | Special Weather Statement | MPX | 47 min |
| Jul 10, 7:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 10, 9:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 10, 10:10 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 10, 11:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 11, 1:03 AM CDT | Special Weather Statement | MPX | 42 min |
| Jul 15, 3:40 AM CDT | Excessive Heat Watch | MPX | 36 hr |
| Jul 15, 12:52 PM CDT | Flood Watch | MPX | 13 hr |
| Jul 15, 3:46 PM CDT | Excessive Heat Warning | MPX | 5 days |
| Jul 16, 6:46 AM CDT | Areal Flood Advisory | MPX | 3 hr |
| Jul 16, 8:01 AM CDT | Areal Flood Advisory | MPX | 3 hr |
| Jul 17, 1:27 PM CDT | Flash Flood Watch | MPX | 13 hr |
| Jul 18, 6:10 AM CDT | Special Weather Statement | MPX | 65 min |
| Jul 18, 6:39 AM CDT | Areal Flood Advisory | MPX | 3 hr |
| Jul 18, 2:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 18, 2:26 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 18, 5:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 19, 9:07 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 19, 5:43 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 7:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 19, 8:37 PM CDT | Severe Thunderstorm Warning | MPX | 53 min |
| Jul 19, 9:42 PM CDT | Severe Thunderstorm Warning | MPX | 37 min |
| Jul 23, 9:37 AM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 23, 5:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jul 23, 5:42 PM CDT | Special Weather Statement | MPX | 63 min |
| Jul 23, 11:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 23, 11:50 PM CDT | Severe Thunderstorm Warning | MPX | 40 min |
| Jul 24, 12:10 AM CDT | Special Weather Statement | MPX | 50 min |
| Jul 28, 2:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 28, 5:21 PM CDT | Areal Flood Advisory | MPX | 3 hr |
| Jul 28, 6:55 PM CDT | Areal Flood Advisory | MPX | 3 hr |
| Jul 30, 11:28 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 30, 1:04 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 30, 2:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 7:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 30, 11:07 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 31, 2:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 4:00 PM CDT | Heat Advisory | MPX | 28 hr |
| Aug 1, 11:29 AM CDT | Mesoscale Discussion | SPC | 31 min |
| Aug 1, 11:52 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 1, 3:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Aug 2, 1:24 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 2, 2:20 AM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Aug 2, 3:32 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 2, 5:23 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 2, 9:02 AM CDT | Mesoscale Discussion | SPC | 58 min |
| Aug 2, 11:51 AM CDT | Mesoscale Discussion | SPC | 24 min |
| Aug 6, 5:26 PM CDT | Special Weather Statement | MPX | 49 min |
| Aug 13, 2:02 PM CDT | Special Weather Statement | MPX | 88 min |
| Aug 13, 3:46 PM CDT | Special Weather Statement | MPX | 89 min |
| Aug 16, 8:50 PM CDT | Flash Flood Warning | MPX | 4 hr |
| Aug 19, 1:51 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Aug 20, 9:49 PM CDT | Special Weather Statement | MPX | 11 min |
| Aug 23, 4:55 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 23, 4:50 PM CDT | Special Weather Statement | MPX | 25 min |
| Sep 13, 2:29 PM CDT | Freeze Watch | MPX | 14 hr |
| Sep 13, 2:29 PM CDT | Freeze Warning | MPX | 42 hr |
| Sep 14, 4:21 AM CDT | Frost Advisory | MPX | 9 hr |
| Sep 15, 11:27 AM CDT | Frost Advisory | MPX | 21 hr |
| Sep 20, 3:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 28, 2:52 PM CDT | Wind Advisory | MPX | 28 hr |
| Sep 30, 4:07 AM CDT | Frost Advisory | MPX | 28 hr |
| Oct 5, 4:22 PM CDT | Wind Advisory | MPX | 54 hr |
| Nov 7, 2:24 PM CST | Winter Storm Watch | MPX | 21 hr |
| Nov 18, 2:50 PM CST | Winter Weather Advisory | MPX | 30 hr |
| Dec 2, 12:13 PM CST | Winter Storm Watch | MPX | 15 hr |
| Dec 3, 3:04 AM CST | Winter Weather Advisory | MPX | 24 hr |
| Dec 11, 2:51 PM CST | Freezing Rain Advisory | MPX | 18 hr |
| Dec 28, 8:29 PM CST | Winter Weather Advisory | MPX | 7 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 archive20102012
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.