Alert archive / Iowa / Black Hawk County
Weather alerts in Black Hawk County, Iowa, 2022
100 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Black Hawk County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 100
- Warnings
- 17
- Watches
- 10
- Advisories
- 39
- Busiest month
- January15 alerts
- Busiest day
- June 15, 20226 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Black Hawk County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 3 | 57% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Des Moines, IA: tornado warnings | 34 | 14 | 59% | 42 | 93% | 24 min |
| NWS Des Moines, IA: severe thunderstorm warnings | 204 | 89 | 56% | 230 | 70% | 22 min |
| NWS Des Moines, IA: flash flood warnings | 8 | 4 | 50% | 11 | 91% | 53 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, 2:53 PM CST | Wind Chill Warning | DMX | 21 hr |
| Jan 4, 3:03 AM CST | Winter Weather Advisory | DMX | 33 hr |
| Jan 5, 3:17 AM CST | Wind Chill Advisory | DMX | 32 hr |
| Jan 6, 2:43 AM CST | Wind Chill Advisory | DMX | 30 hr |
| Jan 6, 11:43 AM CST | Wind Chill Advisory | DMX | 3 hr |
| Jan 8, 3:54 AM CST | Winter Weather Advisory | DMX | 20 hr |
| Jan 12, 10:12 AM CST | Winter Storm Watch | DMX | 29 hr |
| Jan 13, 2:59 PM CST | Winter Storm Warning | DMX | 42 hr |
| Jan 14, 2:35 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 19, 3:00 AM CST | Wind Chill Advisory | DMX | 33 hr |
| Jan 20, 2:00 PM CST | Wind Chill Advisory | DMX | 22 hr |
| Jan 22, 3:24 AM CST | Winter Weather Advisory | DMX | 22 hr |
| Jan 24, 3:22 AM CST | Wind Chill Advisory | DMX | 42 hr |
| Jan 25, 4:04 AM CST | Wind Chill Warning | DMX | 31 hr |
| Jan 27, 3:51 AM CST | Wind Chill Advisory | DMX | 29 hr |
| Feb 2, 3:28 AM CST | Wind Chill Advisory | DMX | 33 hr |
| Feb 11, 10:30 AM CST | Wind Advisory | DMX | 8 hr |
| Feb 18, 3:19 AM CST | Winter Weather Advisory | DMX | 19 hr |
| Feb 20, 2:58 PM CST | Winter Weather Advisory | DMX | 51 hr |
| Feb 23, 4:25 PM CST | Winter Weather Advisory | DMX | 32 hr |
| Mar 5, 3:32 AM CST | Wind Advisory | DMX | 23 hr |
| Mar 5, 1:20 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Mar 5, 2:08 PM CST | Special Weather Statement | DMX | 52 min |
| Mar 5, 2:35 PM CST | Special Weather Statement | DMX | 25 min |
| Mar 6, 2:46 PM CST | Winter Weather Advisory | DMX | 17 hr |
| Mar 24, 3:28 PM CDT | Wind Advisory | DMX | 28 hr |
| Apr 1, 2:32 PM CDT | Winter Weather Advisory | DMX | 17 hr |
| Apr 12, 7:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 12, 9:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 12, 10:55 PM CDT | Special Weather Statement | DMX | 65 min |
| Apr 13, 12:03 AM CDT | Special Weather Statement | DMX | 27 min |
| Apr 13, 3:04 PM CDT | Wind Advisory | DMX | 28 hr |
| Apr 14, 10:34 AM CDT | High Wind Warning | DMX | 8 hr |
| Apr 20, 11:16 PM CDT | Dense Fog Advisory | DMX | 12 hr |
| Apr 22, 3:43 AM CDT | Wind Advisory | DMX | 39 hr |
| Apr 22, 6:03 AM CDT | Special Weather Statement | DMX | 27 min |
| Apr 23, 4:01 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 23, 7:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Apr 23, 8:38 PM CDT | Severe Thunderstorm Warning | DMX | 26 min |
| Apr 25, 2:56 AM CDT | Freeze Warning | DMX | 29 hr |
| Apr 26, 2:36 PM CDT | Freeze Warning | DMX | 17 hr |
| May 8, 2:56 PM CDT | Special Weather Statement | DMX | 49 min |
| May 8, 3:10 PM CDT | Wind Advisory | DMX | 25 hr |
| May 9, 6:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 9, 7:36 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 9, 9:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 30, 3:41 AM CDT | Wind Advisory | DMX | 19 hr |
| May 30, 9:54 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 31, 1:23 AM CDT | Special Weather Statement | DMX | 37 min |
| Jun 5, 3:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 3:02 PM CDT | Heat Advisory | DMX | 52 hr |
| Jun 13, 9:06 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 15, 1:52 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 15, 2:54 AM CDT | Severe Thunderstorm Warning | DMX | 51 min |
| Jun 15, 2:58 AM CDT | Severe Thunderstorm Warning | DMX | 47 min |
| Jun 15, 3:42 AM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 15, 1:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 15, 2:28 PM CDT | Tornado Watch | SPC | 10 hr |
| Jun 25, 3:12 AM CDT | Special Weather Statement | DMX | 63 min |
| Jun 28, 8:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 3, 2:27 PM CDT | Heat Advisory | DMX | 54 hr |
| Jul 5, 3:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 5, 3:50 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 5, 5:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jul 5, 6:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 5, 7:31 PM CDT | Severe Thunderstorm Warning | DMX | 59 min |
| Jul 5, 8:24 PM CDT | Severe Thunderstorm Warning | DMX | 36 min |
| Jul 11, 1:10 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 11, 5:25 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Jul 11, 6:07 AM CDT | Special Weather Statement | DMX | 23 min |
| Jul 22, 3:22 AM CDT | Heat Advisory | DMX | 41 hr |
| Jul 22, 10:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 23, 8:55 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 23, 11:09 PM CDT | Special Weather Statement | DMX | 51 min |
| Jul 31, 8:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Aug 3, 10:20 AM CDT | Special Weather Statement | DMX | 25 min |
| Aug 3, 10:29 AM CDT | Severe Thunderstorm Warning | DMX | 13 min |
| Aug 5, 2:51 AM CDT | Heat Advisory | DMX | 42 hr |
| Aug 19, 3:04 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 19, 3:55 PM CDT | Severe Thunderstorm Warning | DMX | 34 min |
| Aug 24, 5:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 29, 7:39 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Sep 3, 12:18 AM CDT | Special Weather Statement | DMX | 42 min |
| Sep 27, 2:39 PM CDT | Frost Advisory | DMX | 17 hr |
| Oct 7, 2:46 AM CDT | Freeze Warning | DMX | 30 hr |
| Oct 12, 12:27 PM CDT | Wind Advisory | DMX | 7 hr |
| Nov 10, 11:47 AM CST | Mesoscale Discussion | SPC | 88 min |
| Nov 14, 2:36 PM CST | Winter Weather Advisory | DMX | 29 hr |
| Dec 2, 2:55 AM CST | Wind Advisory | DMX | 24 hr |
| Dec 7, 5:08 AM CST | Dense Fog Advisory | DMX | 5 hr |
| Dec 7, 2:54 PM CST | Winter Weather Advisory | DMX | 42 hr |
| Dec 9, 9:34 PM CST | Dense Fog Advisory | DMX | 11 hr |
| Dec 12, 3:19 PM CST | Wind Advisory | DMX | 30 hr |
| Dec 19, 3:50 AM CST | Winter Storm Watch | DMX | 35 hr |
| Dec 20, 3:06 PM CST | Winter Storm Warning | DMX | 72 hr |
| Dec 21, 11:25 AM CST | Blizzard Warning | DMX | 67 hr |
| Dec 23, 3:03 AM CST | Wind Chill Warning | DMX | 33 hr |
| Dec 24, 5:49 AM CST | Winter Weather Advisory | DMX | 6 hr |
| Dec 24, 3:18 PM CST | Wind Chill Advisory | DMX | 19 hr |
| Dec 25, 11:07 AM CST | Winter Weather Advisory | DMX | 22 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 | 7 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 12 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 12 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 3 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 9 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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.