Alert archive / Iowa / Carroll County
Weather alerts in Carroll County, Iowa, 2022
107 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Carroll County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 107
- Warnings
- 23
- Watches
- 18
- Advisories
- 39
- Busiest month
- April18 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.
0 of 2 tornado warnings covering Carroll County in 2022 had a tornado report inside them.
Carroll County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 10 | 5 | 50% | 3 | 100% | 28 min |
| Flash flood warnings | 1 | 1 | 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, 3:07 AM CST | Wind Chill Advisory | DMX | 33 hr |
| Jan 4, 3:08 AM CST | Wind Advisory | DMX | 33 hr |
| Jan 5, 3:17 AM CST | Wind Chill Advisory | DMX | 9 hr |
| Jan 5, 3:17 AM CST | Wind Chill Advisory | DMX | 32 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, 8:51 AM CST | Mesoscale Discussion | SPC | 3 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 24, 3:22 AM CST | Wind Chill Advisory | DMX | 42 hr |
| Jan 24, 2:59 PM CST | Wind Chill Advisory | DMX | 42 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 20, 2:58 PM CST | Winter Weather Advisory | DMX | 51 hr |
| Feb 22, 2:14 PM CST | Wind Chill Advisory | DMX | 20 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, 2:04 PM CST | Tornado Watch | SPC | 6 hr |
| Mar 15, 3:06 AM CDT | Dense Fog Advisory | DMX | 9 hr |
| Mar 24, 3:28 PM CDT | Wind Advisory | DMX | 28 hr |
| Mar 29, 5:33 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 6, 3:48 AM CDT | Wind Advisory | DMX | 42 hr |
| Apr 12, 10:24 AM CDT | Wind Advisory | DMX | 4 hr |
| Apr 12, 5:11 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 12, 8:59 PM CDT | Severe Thunderstorm Warning | DMX | 61 min |
| Apr 12, 9:06 PM CDT | Tornado Warning | DMX | 24 min |
| Apr 12, 9:20 PM CDT | Severe Thunderstorm Warning | DMX | 25 min |
| Apr 12, 9:25 PM CDT | Tornado Warning | DMX | 17 min |
| Apr 13, 3:04 PM CDT | Wind Advisory | DMX | 28 hr |
| Apr 14, 3:32 AM CDT | Red Flag Warning | DMX | 17 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, 8:30 AM CDT | Flash Flood Warning | DMX | 3 hr |
| Apr 23, 10:41 AM CDT | High Wind Warning | DMX | 8 hr |
| Apr 23, 2:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 23, 4:01 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 23, 5:17 PM CDT | Severe Thunderstorm Warning | DMX | 58 min |
| Apr 25, 2:56 AM CDT | Freeze Warning | DMX | 29 hr |
| May 12, 7:00 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 12, 7:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 14, 2:53 PM CDT | Special Weather Statement | DMX | 37 min |
| May 19, 7:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| May 19, 8:57 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 21, 2:48 PM CDT | Frost Advisory | DMX | 18 hr |
| May 29, 5:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 3:41 AM CDT | Wind Advisory | DMX | 19 hr |
| May 30, 5:17 AM CDT | Severe Thunderstorm Warning | DMX | 43 min |
| May 30, 5:40 AM CDT | Mesoscale Discussion | SPC | 95 min |
| May 30, 5:23 PM CDT | Tornado Watch | SPC | 5 hr |
| May 30, 7:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 5, 3:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 11, 3:37 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 12, 3:02 PM CDT | Heat Advisory | DMX | 52 hr |
| Jun 14, 8:46 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 9:23 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 14, 11:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 15, 1:03 AM CDT | Severe Thunderstorm Warning | DMX | 42 min |
| Jun 15, 1:52 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 15, 3:42 AM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 20, 3:04 AM CDT | Heat Advisory | DMX | 17 hr |
| Jun 25, 1:56 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 3, 2:27 PM CDT | Heat Advisory | DMX | 54 hr |
| 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, 6:17 PM CDT | Special Weather Statement | DMX | 43 min |
| Jul 5, 6:49 PM CDT | Special Weather Statement | DMX | 56 min |
| Jul 6, 2:59 PM CDT | Flood Watch | DMX | 18 hr |
| Jul 10, 10:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 11, 1:10 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 11, 3:24 AM CDT | Special Weather Statement | DMX | 51 min |
| Jul 11, 3:35 AM CDT | Severe Thunderstorm Warning | DMX | 40 min |
| Jul 11, 3:58 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 11, 4:05 AM CDT | Severe Thunderstorm Warning | DMX | 40 min |
| Jul 22, 3:22 AM CDT | Heat Advisory | DMX | 41 hr |
| Jul 23, 7:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 8:55 PM CDT | Severe Thunderstorm Warning | DMX | 50 min |
| Jul 23, 8:55 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 23, 9:15 PM CDT | Severe Thunderstorm Warning | DMX | 30 min |
| Jul 23, 9:48 PM CDT | Special Weather Statement | DMX | 42 min |
| Aug 1, 3:23 AM CDT | Heat Advisory | DMX | 41 hr |
| Aug 5, 2:51 AM CDT | Heat Advisory | DMX | 42 hr |
| Aug 7, 2:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 9:39 PM CDT | Severe Thunderstorm Warning | DMX | 36 min |
| Aug 26, 5:34 AM CDT | Dense Fog Advisory | DMX | 3 hr |
| Aug 27, 2:50 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 17, 6:59 PM CDT | Mesoscale Discussion | SPC | 4 hr |
| Sep 17, 7:16 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 27, 2:39 PM CDT | Frost Advisory | DMX | 17 hr |
| Oct 7, 2:46 AM CDT | Freeze Warning | DMX | 30 hr |
| Oct 11, 3:01 PM CDT | Fire Weather Watch | DMX | 13 hr |
| Oct 11, 11:15 PM CDT | Special Weather Statement | DMX | 30 min |
| Oct 12, 12:27 PM CDT | Wind Advisory | DMX | 7 hr |
| Oct 12, 2:49 PM CDT | Red Flag Warning | DMX | 28 hr |
| Oct 23, 3:03 AM CDT | Wind Advisory | DMX | 23 hr |
| Nov 28, 2:28 PM CST | Winter Weather Advisory | DMX | 28 hr |
| Dec 2, 2:55 AM CST | Wind Advisory | DMX | 24 hr |
| Dec 7, 2:54 PM CST | Winter Weather Advisory | DMX | 42 hr |
| Dec 11, 2:54 PM CST | Dense Fog Advisory | DMX | 17 hr |
| Dec 12, 3:49 AM CST | Winter Storm Watch | 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 |
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 | 10 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 21 |
| Special Weather Statement | 6 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 4 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 10 |
| Wind and dust | |
| High Wind Warning | 2 |
| Wind Advisory | 13 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| 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 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.