Alert archive / Iowa / Chickasaw County
Weather alerts in Chickasaw County, Iowa, 2020
104 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Chickasaw County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 104
- Warnings
- 16
- Watches
- 12
- Advisories
- 40
- Busiest month
- July20 alerts
- Busiest day
- September 6, 202010 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Chickasaw County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 3 | 57% | 4 | 100% | 14 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 145 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS La Crosse, WI: tornado warnings | 8 | 3 | 63% | 11 | 55% | 9 min |
| NWS La Crosse, WI: severe thunderstorm warnings | 99 | 48 | 52% | 182 | 70% | 22 min |
| NWS La Crosse, WI: flash flood warnings | 12 | 9 | 25% | 34 | 85% | 127 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, 6:10 PM CST | Winter Weather Advisory | ARX | 6 hr |
| Jan 5, 2:40 AM CST | Wind Advisory | ARX | 13 hr |
| Jan 10, 2:59 AM CST | Winter Weather Advisory | ARX | 24 hr |
| Jan 13, 2:04 PM CST | Winter Weather Advisory | ARX | 16 hr |
| Jan 14, 1:57 PM CST | Winter Weather Advisory | ARX | 22 hr |
| Jan 15, 3:25 PM CST | Wind Chill Advisory | ARX | 18 hr |
| Jan 15, 3:25 PM CST | Winter Storm Watch | ARX | 21 hr |
| Jan 16, 12:42 PM CST | Winter Storm Warning | ARX | 53 hr |
| Jan 18, 9:05 AM CST | Blizzard Warning | ARX | 9 hr |
| Jan 18, 2:18 PM CST | Wind Chill Advisory | ARX | 22 hr |
| Jan 21, 7:22 PM CST | Winter Weather Advisory | ARX | 26 hr |
| Jan 26, 7:00 PM CST | Dense Fog Advisory | ARX | 9 hr |
| Feb 7, 2:37 AM CST | Winter Storm Watch | ARX | 25 hr |
| Feb 8, 3:49 AM CST | Winter Storm Warning | ARX | 38 hr |
| Feb 12, 4:11 AM CST | Wind Chill Advisory | ARX | 54 hr |
| Feb 12, 4:11 AM CST | Winter Weather Advisory | ARX | 20 hr |
| Feb 16, 3:05 PM CST | Winter Weather Advisory | ARX | 33 hr |
| Feb 17, 3:27 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 19, 2:22 PM CST | Wind Chill Advisory | ARX | 19 hr |
| Mar 4, 8:15 PM CST | Wind Advisory | ARX | 28 hr |
| Apr 3, 3:21 AM CDT | Winter Weather Advisory | ARX | 16 hr |
| Apr 7, 3:31 AM CDT | Dense Fog Advisory | ARX | 6 hr |
| Apr 9, 2:46 AM CDT | Wind Advisory | ARX | 16 hr |
| Apr 22, 2:20 PM CDT | Special Weather Statement | ARX | 55 min |
| Apr 29, 8:31 AM CDT | Wind Advisory | ARX | 10 hr |
| May 7, 9:48 AM CDT | Freeze Watch | ARX | 17 hr |
| May 8, 3:13 AM CDT | Freeze Warning | ARX | 29 hr |
| May 10, 2:51 AM CDT | Freeze Warning | ARX | 29 hr |
| May 11, 3:27 PM CDT | Frost Advisory | ARX | 17 hr |
| May 24, 2:00 AM CDT | Dense Fog Advisory | ARX | 7 hr |
| May 26, 1:20 PM CDT | Tornado Watch | SPC | 7 hr |
| May 26, 6:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 2, 4:39 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 2, 5:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 2, 7:55 PM CDT | Severe Thunderstorm Warning | ARX | 50 min |
| Jun 4, 5:14 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 4, 10:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 5, 1:02 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 8, 3:21 AM CDT | Flash Flood Watch | ARX | 47 hr |
| Jun 9, 6:05 PM CDT | Flash Flood Warning | ARX | 3 hr |
| Jun 9, 9:02 PM CDT | Areal Flood Warning | ARX | 27 hr |
| Jun 21, 8:22 PM CDT | Special Weather Statement | ARX | 38 min |
| Jun 21, 9:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 10:20 PM CDT | Special Weather Statement | ARX | 55 min |
| Jun 26, 12:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 1:16 PM CDT | Special Weather Statement | ARX | 44 min |
| Jun 26, 1:24 PM CDT | Severe Thunderstorm Warning | ARX | 36 min |
| Jul 7, 1:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 3:38 PM CDT | Heat Advisory | ARX | 27 hr |
| Jul 9, 10:24 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 9, 11:05 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 9, 1:18 PM CDT | Severe Thunderstorm Warning | ARX | 87 min |
| Jul 11, 8:03 AM CDT | Special Weather Statement | ARX | 42 min |
| Jul 11, 8:21 AM CDT | Severe Thunderstorm Warning | ARX | 39 min |
| Jul 11, 1:10 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 2:52 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 11, 3:07 PM CDT | Special Weather Statement | ARX | 53 min |
| Jul 11, 5:11 PM CDT | Severe Thunderstorm Warning | ARX | 49 min |
| Jul 14, 3:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 4:11 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 14, 4:52 PM CDT | Special Weather Statement | ARX | 83 min |
| Jul 14, 6:22 PM CDT | Special Weather Statement | ARX | 53 min |
| Jul 14, 8:00 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jul 17, 2:35 AM CDT | Heat Advisory | ARX | 41 hr |
| Jul 18, 7:03 AM CDT | Special Weather Statement | ARX | 42 min |
| Jul 18, 7:37 AM CDT | Special Weather Statement | ARX | 38 min |
| Jul 25, 2:44 AM CDT | Heat Advisory | ARX | 17 hr |
| Aug 9, 10:59 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 10, 9:58 AM CDT | Special Weather Statement | ARX | 47 min |
| Aug 10, 10:32 AM CDT | Severe Thunderstorm Warning | ARX | 23 min |
| Aug 10, 10:42 AM CDT | Mesoscale Discussion | SPC | 93 min |
| Aug 10, 10:59 AM CDT | Special Weather Statement | ARX | 46 min |
| Aug 24, 3:21 AM CDT | Heat Advisory | ARX | 16 hr |
| Aug 25, 2:48 AM CDT | Heat Advisory | ARX | 16 hr |
| Aug 26, 2:53 AM CDT | Heat Advisory | ARX | 16 hr |
| Aug 28, 6:59 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 28, 8:33 AM CDT | Special Weather Statement | ARX | 72 min |
| Sep 5, 7:53 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 5, 9:34 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 5, 11:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Sep 6, 12:10 AM CDT | Special Weather Statement | ARX | 65 min |
| Sep 6, 1:06 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Sep 6, 1:15 AM CDT | Special Weather Statement | ARX | 60 min |
| Sep 6, 1:41 AM CDT | Severe Thunderstorm Warning | ARX | 49 min |
| Sep 6, 2:32 AM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 6, 5:30 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Sep 6, 5:54 AM CDT | Special Weather Statement | ARX | 51 min |
| Oct 1, 3:56 AM CDT | Frost Advisory | ARX | 28 hr |
| Oct 3, 1:44 PM CDT | Frost Advisory | ARX | 18 hr |
| Oct 14, 1:12 PM CDT | Wind Advisory | ARX | 12 hr |
| Oct 15, 1:30 PM CDT | Freeze Warning | ARX | 18 hr |
| Oct 31, 11:48 PM CDT | Wind Advisory | ARX | 15 hr |
| Nov 7, 1:10 PM CST | Wind Advisory | ARX | 29 hr |
| Nov 14, 2:06 PM CST | Wind Advisory | ARX | 28 hr |
| Nov 23, 2:19 PM CST | Winter Weather Advisory | ARX | 30 hr |
| Nov 24, 7:49 PM CST | Dense Fog Advisory | ARX | 12 hr |
| Dec 21, 3:31 AM CST | Wind Advisory | ARX | 12 hr |
| Dec 22, 9:07 PM CST | Wind Advisory | ARX | 27 hr |
| Dec 22, 9:09 PM CST | Winter Weather Advisory | ARX | 29 hr |
| Dec 24, 1:55 AM CST | Wind Chill Advisory | ARX | 10 hr |
| Dec 24, 1:24 PM CST | Wind Chill Advisory | ARX | 19 hr |
| Dec 28, 3:45 AM CST | Winter Storm Watch | ARX | 11 hr |
| Dec 28, 3:45 AM CST | Winter Weather Advisory | ARX | 53 hr |
| Dec 28, 2:31 PM CST | Winter Storm Warning | ARX | 37 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 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 20 |
| Special Weather Statement | 16 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 6 |
| Wind and dust | |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.