Alert archive / Wisconsin / Clark County
Weather alerts in Clark County, Wisconsin, 2015
87 weather alerts in 2015, 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 2015. Tap one for its archive.
- Alerts
- 87
- Warnings
- 7
- Watches
- 11
- Advisories
- 28
- Busiest month
- September14 alerts
- Busiest day
- July 13, 20158 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Clark County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 1 | 0% | 2 | 50% | 28 min |
| Flash flood warnings | 1 | 1 | 0% | 2 | 100% | 103 min |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS La Crosse, WI: tornado warnings | 4 | 0 | 100% | 4 | 0% | |
| NWS La Crosse, WI: severe thunderstorm warnings | 47 | 33 | 30% | 124 | 83% | 23 min |
| NWS La Crosse, WI: flash flood warnings | 9 | 5 | 44% | 20 | 75% | 74 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 3, 3:10 PM CST | Wind Chill Watch | ARX | 13 hr |
| Jan 4, 3:56 AM CST | Wind Chill Warning | ARX | 32 hr |
| Jan 4, 3:56 AM CST | Wind Chill Advisory | ARX | 32 hr |
| Jan 5, 2:47 PM CST | Wind Chill Advisory | ARX | 21 hr |
| Jan 6, 3:47 AM CST | Wind Chill Warning | ARX | 32 hr |
| Jan 7, 11:46 AM CST | Wind Chill Advisory | ARX | 21 hr |
| Jan 8, 4:49 AM CST | Winter Weather Advisory | ARX | 28 hr |
| Jan 8, 8:00 PM CST | Wind Chill Advisory | ARX | 37 hr |
| Jan 25, 8:23 PM CST | Winter Weather Advisory | ARX | 24 hr |
| Jan 28, 2:59 PM CST | Freezing Rain Advisory | ARX | 15 hr |
| Feb 10, 3:53 AM CST | Winter Weather Advisory | ARX | 20 hr |
| Feb 13, 3:07 PM CST | Wind Chill Advisory | ARX | 39 hr |
| Feb 17, 3:00 AM CST | Wind Chill Advisory | ARX | 33 hr |
| Feb 18, 11:45 AM CST | Wind Chill Advisory | ARX | 24 hr |
| Feb 20, 3:06 PM CST | Wind Chill Advisory | ARX | 67 hr |
| Mar 2, 4:14 AM CST | Winter Weather Advisory | ARX | 34 hr |
| Mar 15, 1:27 AM CDT | Flood Watch | ARX | 30 hr |
| Mar 19, 9:39 PM CDT | Areal Flood Advisory | ARX | 12 hr |
| Mar 24, 4:08 AM CDT | Winter Weather Advisory | ARX | 26 hr |
| Mar 29, 6:45 AM CDT | Freezing Rain Advisory | ARX | 2 hr |
| Mar 31, 2:56 AM CDT | Dense Fog Advisory | ARX | 7 hr |
| Apr 14, 3:27 PM CDT | Fire Weather Watch | ARX | 13 hr |
| Apr 15, 4:16 AM CDT | Red Flag Warning | ARX | 16 hr |
| May 3, 3:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 6:41 PM CDT | Special Weather Statement | ARX | 94 min |
| May 3, 8:05 PM CDT | Special Weather Statement | ARX | 55 min |
| May 6, 8:30 PM CDT | Special Weather Statement | ARX | 30 min |
| May 12, 3:29 PM CDT | Frost Advisory | ARX | 16 hr |
| May 17, 2:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| May 19, 3:34 AM CDT | Frost Advisory | ARX | 28 hr |
| May 25, 7:52 AM CDT | Special Weather Statement | ARX | 68 min |
| May 27, 8:33 PM CDT | Special Weather Statement | ARX | 57 min |
| May 29, 4:51 PM CDT | Special Weather Statement | ARX | 54 min |
| May 29, 5:56 PM CDT | Special Weather Statement | ARX | 2 hr |
| May 30, 3:10 AM CDT | Frost Advisory | ARX | 29 hr |
| Jun 7, 1:55 AM CDT | Special Weather Statement | ARX | 20 min |
| Jun 7, 2:37 AM CDT | Special Weather Statement | ARX | 53 min |
| Jun 10, 1:46 PM CDT | Flash Flood Watch | ARX | 32 hr |
| Jun 20, 7:41 AM CDT | Special Weather Statement | ARX | 94 min |
| Jun 22, 6:03 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 22, 7:42 AM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 29, 1:57 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 29, 3:09 PM CDT | Special Weather Statement | ARX | 21 min |
| Jun 29, 3:40 PM CDT | Special Weather Statement | ARX | 65 min |
| Jun 29, 4:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 12, 9:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 12, 9:59 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 12, 11:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 13, 12:47 AM CDT | Special Weather Statement | ARX | 58 min |
| Jul 13, 1:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 13, 3:11 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 13, 4:55 PM CDT | Special Weather Statement | ARX | 65 min |
| Jul 13, 6:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jul 18, 12:41 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 18, 2:05 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 18, 2:24 AM CDT | Special Weather Statement | ARX | 66 min |
| Jul 18, 2:32 AM CDT | Severe Thunderstorm Warning | ARX | 73 min |
| Jul 18, 3:06 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 2, 12:55 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 2, 4:21 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 7:27 AM CDT | Special Weather Statement | ARX | 33 min |
| Aug 2, 7:51 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 4:19 PM CDT | Special Weather Statement | ARX | 56 min |
| Aug 9, 5:09 PM CDT | Special Weather Statement | ARX | 51 min |
| Aug 13, 2:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 2, 1:56 PM CDT | Special Weather Statement | ARX | 49 min |
| Sep 2, 2:47 PM CDT | Special Weather Statement | ARX | 58 min |
| Sep 2, 3:44 PM CDT | Special Weather Statement | ARX | 61 min |
| Sep 6, 3:24 PM CDT | Special Weather Statement | ARX | 36 min |
| Sep 6, 4:42 PM CDT | Special Weather Statement | ARX | 33 min |
| Sep 6, 5:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 6, 8:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Sep 6, 8:53 PM CDT | Areal Flood Advisory | ARX | 4 hr |
| Sep 6, 9:45 PM CDT | Special Weather Statement | ARX | 45 min |
| Sep 6, 10:06 PM CDT | Flash Flood Warning | ARX | 4 hr |
| Sep 7, 1:47 AM CDT | Areal Flood Warning | ARX | 9 hr |
| Sep 8, 2:43 AM CDT | Flash Flood Watch | ARX | 7 hr |
| Sep 29, 11:01 AM CDT | Frost Advisory | ARX | 21 hr |
| Sep 30, 2:51 PM CDT | Frost Advisory | ARX | 17 hr |
| Oct 1, 3:21 PM CDT | Frost Advisory | ARX | 17 hr |
| Oct 2, 3:01 PM CDT | Frost Advisory | ARX | 17 hr |
| Oct 31, 10:17 PM CDT | Special Weather Statement | ARX | 28 min |
| Nov 25, 3:34 PM CST | Winter Weather Advisory | ARX | 26 hr |
| Nov 29, 2:42 PM CST | Winter Weather Advisory | ARX | 37 hr |
| Dec 25, 3:19 PM CST | Winter Weather Advisory | ARX | 23 hr |
| Dec 26, 3:25 PM CST | Winter Storm Watch | ARX | 24 hr |
| Dec 27, 3:17 PM CST | Winter Storm Warning | ARX | 39 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 archive20142016
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.