Alert archive / Wisconsin / Portage County
Weather alerts in Portage County, Wisconsin, 2015
103 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Portage County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 103
- Warnings
- 18
- Watches
- 11
- Advisories
- 33
- Busiest month
- August18 alerts
- Busiest day
- August 2, 201511 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Portage County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 6 | 40% | 7 | 86% | 26 min |
| Flash flood warnings | 2 | 0 | 100% | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Green Bay, WI: tornado warnings | 5 | 2 | 60% | 10 | 50% | 6 min |
| NWS Green Bay, WI: severe thunderstorm warnings | 66 | 33 | 50% | 101 | 80% | 25 min |
| NWS Green Bay, WI: flash flood warnings | 3 | 0 | 100% | 1 | 0% |
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, 2:55 PM CST | Wind Chill Watch | GRB | 13 hr |
| Jan 3, 2:55 PM CST | Winter Weather Advisory | GRB | 24 hr |
| Jan 4, 3:52 AM CST | Wind Chill Warning | GRB | 32 hr |
| Jan 4, 3:52 AM CST | Wind Chill Advisory | GRB | 56 hr |
| Jan 5, 2:55 PM CST | Wind Chill Advisory | GRB | 21 hr |
| Jan 6, 11:49 AM CST | Wind Chill Warning | GRB | 23 hr |
| Jan 6, 11:49 AM CST | Wind Chill Advisory | GRB | 48 hr |
| Jan 7, 2:36 PM CST | Winter Weather Advisory | GRB | 39 hr |
| Jan 8, 2:41 PM CST | Wind Chill Advisory | GRB | 43 hr |
| Jan 28, 9:19 PM CST | Freezing Rain Advisory | GRB | 10 hr |
| Feb 10, 3:31 AM CST | Winter Weather Advisory | GRB | 24 hr |
| Feb 13, 2:47 PM CST | Wind Chill Advisory | GRB | 43 hr |
| Feb 17, 4:31 AM CST | Wind Chill Advisory | GRB | 55 hr |
| Feb 18, 11:59 AM CST | Wind Chill Advisory | GRB | 24 hr |
| Feb 21, 3:53 AM CST | Wind Chill Advisory | GRB | 54 hr |
| Mar 2, 4:32 AM CST | Winter Weather Advisory | GRB | 34 hr |
| Mar 24, 4:22 AM CDT | Winter Weather Advisory | GRB | 30 hr |
| Apr 14, 3:23 PM CDT | Fire Weather Watch | GRB | 12 hr |
| Apr 15, 3:49 AM CDT | Red Flag Warning | GRB | 16 hr |
| May 12, 2:23 PM CDT | Frost Advisory | GRB | 17 hr |
| May 17, 2:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| May 19, 2:48 AM CDT | Frost Advisory | GRB | 29 hr |
| May 25, 5:54 PM CDT | Special Weather Statement | GRB | 51 min |
| May 25, 6:24 PM CDT | Special Weather Statement | GRB | 66 min |
| May 25, 6:54 PM CDT | Special Weather Statement | GRB | 36 min |
| May 25, 7:32 PM CDT | Special Weather Statement | GRB | 28 min |
| May 26, 11:22 AM CDT | Mesoscale Discussion | SPC | 113 min |
| May 26, 1:51 PM CDT | Special Weather Statement | GRB | 39 min |
| May 30, 4:10 AM CDT | Frost Advisory | GRB | 28 hr |
| Jun 7, 9:29 PM CDT | Special Weather Statement | GRB | 46 min |
| Jun 8, 3:02 PM CDT | Special Weather Statement | GRB | 43 min |
| Jun 8, 3:47 PM CDT | Special Weather Statement | GRB | 43 min |
| Jun 8, 5:53 PM CDT | Special Weather Statement | GRB | 37 min |
| Jun 8, 6:34 PM CDT | Special Weather Statement | GRB | 41 min |
| Jun 8, 7:52 PM CDT | Special Weather Statement | GRB | 38 min |
| Jun 10, 3:02 PM CDT | Flash Flood Watch | GRB | 22 hr |
| Jun 11, 1:14 PM CDT | Flood Watch | GRB | 7 hr |
| Jun 14, 3:58 AM CDT | Dense Fog Advisory | GRB | 6 hr |
| Jun 20, 8:23 AM CDT | Special Weather Statement | GRB | 52 min |
| Jun 21, 4:36 AM CDT | Special Weather Statement | GRB | 2 hr |
| Jun 22, 9:57 AM CDT | Wind Advisory | GRB | 5 hr |
| Jun 22, 7:52 PM CDT | Special Weather Statement | GRB | 83 min |
| Jun 28, 1:20 PM CDT | Special Weather Statement | GRB | 55 min |
| Jun 29, 1:57 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 29, 4:18 PM CDT | Special Weather Statement | GRB | 42 min |
| Jun 29, 4:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 6, 8:29 AM CDT | Special Weather Statement | GRB | 61 min |
| Jul 13, 2:10 AM CDT | Severe Thunderstorm Warning | GRB | 65 min |
| Jul 13, 3:16 AM CDT | Severe Thunderstorm Warning | GRB | 19 min |
| Jul 13, 4:05 AM CDT | Areal Flood Advisory | GRB | 3 hr |
| 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, 6:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jul 13, 6:19 PM CDT | Severe Thunderstorm Warning | GRB | 56 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, 3:06 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 18, 3:11 AM CDT | Severe Thunderstorm Warning | GRB | 64 min |
| Jul 18, 4:15 AM CDT | Severe Thunderstorm Warning | GRB | 60 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, 7:51 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 2:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 2:27 PM CDT | Special Weather Statement | GRB | 33 min |
| Aug 2, 2:33 PM CDT | Severe Thunderstorm Warning | GRB | 27 min |
| Aug 2, 2:59 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 2, 3:03 PM CDT | Severe Thunderstorm Warning | GRB | 27 min |
| Aug 2, 3:28 PM CDT | Severe Thunderstorm Warning | GRB | 62 min |
| Aug 2, 4:13 PM CDT | Severe Thunderstorm Warning | GRB | 32 min |
| Aug 2, 4:50 PM CDT | Severe Thunderstorm Warning | GRB | 25 min |
| Aug 13, 2:24 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 14, 3:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Aug 18, 3:51 PM CDT | Special Weather Statement | GRB | 54 min |
| Aug 18, 7:02 PM CDT | Special Weather Statement | GRB | 58 min |
| Aug 18, 7:37 PM CDT | Areal Flood Advisory | GRB | 113 min |
| Aug 18, 8:38 PM CDT | Flash Flood Warning | GRB | 3 hr |
| Aug 30, 3:33 AM CDT | Dense Fog Advisory | GRB | 5 hr |
| Sep 2, 2:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 6, 5:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 6, 9:44 PM CDT | Areal Flood Advisory | GRB | 5 hr |
| Sep 6, 11:26 PM CDT | Special Weather Statement | GRB | 64 min |
| Sep 7, 1:40 AM CDT | Flash Flood Warning | GRB | 4 hr |
| Sep 8, 4:00 AM CDT | Flash Flood Watch | GRB | 8 hr |
| Sep 8, 7:25 AM CDT | Areal Flood Advisory | GRB | 3 hr |
| Sep 17, 7:11 PM CDT | Special Weather Statement | GRB | 64 min |
| Sep 17, 9:18 PM CDT | Special Weather Statement | GRB | 72 min |
| Sep 29, 10:11 AM CDT | Frost Advisory | GRB | 22 hr |
| Sep 30, 2:48 PM CDT | Frost Advisory | GRB | 17 hr |
| Oct 1, 2:46 PM CDT | Frost Advisory | GRB | 17 hr |
| Oct 2, 3:01 PM CDT | Frost Advisory | GRB | 17 hr |
| Nov 11, 6:09 PM CST | Special Weather Statement | GRB | 36 min |
| Nov 11, 8:02 PM CST | Special Weather Statement | GRB | 88 min |
| Nov 12, 3:23 AM CST | Wind Advisory | GRB | 15 hr |
| Nov 19, 8:43 AM CST | Wind Advisory | GRB | 10 hr |
| Nov 26, 4:24 AM CST | Winter Weather Advisory | GRB | 22 hr |
| Nov 30, 5:14 AM CST | Winter Weather Advisory | GRB | 4 hr |
| Dec 13, 3:35 AM CST | Flood Watch | GRB | 35 hr |
| Dec 14, 10:25 PM CST | Areal Flood Advisory | GRB | 47 hr |
| Dec 15, 3:15 PM CST | River Flood Warning | GRB | 32 hr |
| Dec 15, 3:20 PM CST | River Flood Warning | GRB | 31 hr |
| Dec 27, 3:31 AM CST | Winter Storm Watch | GRB | 12 hr |
| Dec 27, 3:10 PM CST | Winter Storm Warning | GRB | 39 hr |
| Dec 28, 6:00 PM CST | Mesoscale Discussion | SPC | 5 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.