Alert archive / Wisconsin / Polk County
Weather alerts in Polk County, Wisconsin, 2017
69 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Polk County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 69
- Warnings
- 9
- Watches
- 13
- Advisories
- 28
- Busiest month
- January11 alerts
- Busiest day
- June 11, 20176 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 warnings covering Polk County in 2017 had a tornado report inside them.
Polk County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 7 | 5 | 29% | 7 | 57% | 23 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Twin Cities, MN: tornado warnings | 40 | 18 | 55% | 38 | 76% | 28 min |
| NWS Twin Cities, MN: severe thunderstorm warnings | 210 | 92 | 56% | 400 | 65% | 24 min |
| NWS Twin Cities, MN: flash flood warnings | 6 | 2 | 67% | 3 | 100% | 107 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 1, 3:40 AM CST | Winter Weather Advisory | MPX | 50 hr |
| Jan 4, 2:30 PM CST | Wind Chill Advisory | MPX | 22 hr |
| Jan 6, 2:36 PM CST | Wind Chill Advisory | MPX | 18 hr |
| Jan 10, 3:28 AM CST | Winter Weather Advisory | MPX | 18 hr |
| Jan 11, 1:22 AM CST | Winter Weather Advisory | MPX | 11 hr |
| Jan 12, 2:43 PM CST | Wind Chill Advisory | MPX | 15 hr |
| Jan 18, 11:41 PM CST | Dense Fog Advisory | MPX | 12 hr |
| Jan 20, 9:14 AM CST | Freezing Rain Advisory | MPX | 3 hr |
| Jan 21, 12:18 PM CST | Dense Fog Advisory | MPX | 24 hr |
| Jan 29, 2:34 PM CST | Winter Weather Advisory | MPX | 27 hr |
| Jan 30, 10:15 AM CST | Mesoscale Discussion | SPC | 3 hr |
| Feb 6, 2:30 PM CST | Freezing Rain Advisory | MPX | 25 hr |
| Feb 21, 3:30 PM CST | Winter Storm Watch | MPX | 45 hr |
| Feb 23, 12:31 PM CST | Winter Weather Advisory | MPX | 35 hr |
| Mar 5, 2:42 PM CST | High Wind Watch | MPX | 36 hr |
| Mar 6, 4:04 AM CST | Wind Advisory | MPX | 60 hr |
| Mar 6, 1:37 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 6, 2:43 PM CST | Tornado Watch | SPC | 7 hr |
| Mar 6, 6:11 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 8, 2:23 AM CST | Wind Advisory | MPX | 14 hr |
| Apr 3, 4:08 AM CDT | Dense Fog Advisory | MPX | 8 hr |
| Apr 9, 3:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Apr 10, 8:59 PM CDT | Special Weather Statement | MPX | 76 min |
| Apr 15, 7:59 PM CDT | Special Weather Statement | MPX | 31 min |
| May 16, 3:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 16, 4:01 PM CDT | Severe Thunderstorm Warning | MPX | 44 min |
| May 16, 4:02 PM CDT | Tornado Watch | SPC | 6 hr |
| May 16, 4:39 PM CDT | Tornado Warning | MPX | 51 min |
| May 16, 6:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| May 18, 2:20 PM CDT | Frost Advisory | MPX | 17 hr |
| Jun 11, 5:51 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 11, 6:28 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 8:50 AM CDT | Severe Thunderstorm Warning | MPX | 40 min |
| Jun 11, 9:25 AM CDT | Severe Thunderstorm Warning | MPX | 65 min |
| Jun 11, 9:30 AM CDT | Mesoscale Discussion | SPC | 60 min |
| Jun 11, 6:20 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 11, 10:59 PM CDT | Dense Fog Advisory | MPX | 9 hr |
| Jun 14, 1:00 AM CDT | Special Weather Statement | MPX | 45 min |
| Jun 28, 2:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 28, 4:09 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 28, 7:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 30, 10:34 PM CDT | Special Weather Statement | MPX | 41 min |
| Jul 6, 3:26 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 6, 4:41 AM CDT | Special Weather Statement | MPX | 34 min |
| Jul 6, 5:37 AM CDT | Severe Thunderstorm Warning | MPX | 38 min |
| Jul 11, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 12, 1:49 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 2:48 AM CDT | Severe Thunderstorm Warning | MPX | 27 min |
| Jul 12, 3:17 AM CDT | Severe Thunderstorm Warning | MPX | 43 min |
| Jul 17, 3:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 21, 7:34 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 22, 3:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 2:49 AM CDT | Dense Fog Advisory | MPX | 6 hr |
| Sep 12, 2:54 AM CDT | Dense Fog Advisory | MPX | 6 hr |
| Sep 20, 1:22 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 20, 3:04 AM CDT | Severe Thunderstorm Warning | MPX | 26 min |
| Sep 20, 3:26 AM CDT | Special Weather Statement | MPX | 34 min |
| Oct 2, 3:21 AM CDT | Flash Flood Watch | MPX | 27 hr |
| Oct 8, 2:33 PM CDT | Freeze Watch | MPX | 12 hr |
| Oct 9, 2:53 AM CDT | Freeze Warning | MPX | 30 hr |
| Oct 23, 11:05 AM CDT | Wind Advisory | MPX | 31 hr |
| Oct 26, 4:08 AM CDT | Winter Weather Advisory | MPX | 39 hr |
| Oct 31, 7:48 PM CDT | Winter Weather Advisory | MPX | 29 hr |
| Nov 3, 3:59 AM CDT | Winter Weather Advisory | MPX | 27 hr |
| Dec 3, 3:10 PM CST | Wind Advisory | MPX | 39 hr |
| Dec 3, 3:22 PM CST | Winter Weather Advisory | MPX | 37 hr |
| Dec 13, 2:41 AM CST | Winter Weather Advisory | MPX | 9 hr |
| Dec 24, 2:16 PM CST | Wind Chill Advisory | MPX | 67 hr |
| Dec 29, 2:37 PM CST | Wind Chill Advisory | MPX | 68 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 | 7 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 13 |
| Special Weather Statement | 6 |
| Flooding | |
| Flash Flood Watch | 1 |
| Winter | |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 2 |
| Winter Weather Advisory | 10 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 5 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.