Alert archive / Iowa / Howard County
Weather alerts in Howard County, Iowa, 2023
83 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Howard County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 83
- Warnings
- 9
- Watches
- 13
- Advisories
- 33
- Busiest month
- August14 alerts
- Busiest day
- March 31, 20236 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Howard County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 1 | 50% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS La Crosse, WI: tornado warnings | 1 | 0 | 100% | 1 | 0% | |
| NWS La Crosse, WI: severe thunderstorm warnings | 76 | 49 | 36% | 160 | 78% | 23 min |
| NWS La Crosse, WI: flash flood warnings | 2 | 1 | 50% | 1 | 100% | 152 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, 5:51 AM CST | Dense Fog Advisory | ARX | 3 hr |
| Jan 2, 3:37 AM CST | Winter Weather Advisory | ARX | 38 hr |
| Jan 3, 6:22 PM CST | Dense Fog Advisory | ARX | 8 hr |
| Jan 8, 4:44 AM CST | Dense Fog Advisory | ARX | 7 hr |
| Jan 16, 6:29 PM CST | Dense Fog Advisory | ARX | 6 hr |
| Jan 17, 2:35 AM CST | Winter Storm Watch | ARX | 25 hr |
| Jan 18, 3:18 AM CST | Winter Storm Warning | ARX | 34 hr |
| Jan 22, 7:41 PM CST | Dense Fog Advisory | ARX | 11 hr |
| Jan 24, 8:09 AM CST | Dense Fog Advisory | ARX | 4 hr |
| Jan 27, 2:58 AM CST | Winter Weather Advisory | ARX | 48 hr |
| Jan 29, 2:18 PM CST | Wind Chill Advisory | ARX | 20 hr |
| Jan 30, 1:52 PM CST | Wind Chill Advisory | ARX | 20 hr |
| Feb 2, 2:53 AM CST | Wind Chill Advisory | ARX | 32 hr |
| Feb 7, 2:25 PM CST | Winter Storm Watch | ARX | 24 hr |
| Feb 19, 2:14 PM CST | Winter Storm Watch | ARX | 48 hr |
| Feb 21, 2:57 AM CST | Winter Storm Warning | ARX | 57 hr |
| Mar 6, 8:12 AM CST | Dense Fog Advisory | ARX | 3 hr |
| Mar 7, 2:47 PM CST | Winter Storm Watch | ARX | 24 hr |
| Mar 8, 2:22 PM CST | Winter Storm Warning | ARX | 40 hr |
| Mar 9, 8:42 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Mar 31, 3:33 AM CDT | Winter Weather Advisory | ARX | 27 hr |
| Mar 31, 11:24 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Mar 31, 11:46 AM CDT | Tornado Watch | SPC | 8 hr |
| Mar 31, 3:43 PM CDT | Severe Thunderstorm Warning | ARX | 47 min |
| Mar 31, 5:18 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Mar 31, 5:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 4, 2:54 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 4, 5:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Apr 4, 6:34 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 4, 8:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Apr 4, 10:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Apr 12, 2:43 AM CDT | Red Flag Warning | ARX | 17 hr |
| Apr 12, 2:32 PM CDT | Fire Weather Watch | ARX | 11 hr |
| Apr 13, 1:46 AM CDT | Red Flag Warning | ARX | 18 hr |
| Apr 15, 2:46 PM CDT | Wind Advisory | ARX | 40 hr |
| Apr 30, 3:03 AM CDT | Wind Advisory | ARX | 17 hr |
| May 1, 10:37 AM CDT | Wind Advisory | ARX | 8 hr |
| May 7, 2:52 AM CDT | Dense Fog Advisory | ARX | 8 hr |
| May 8, 2:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 14, 1:18 PM CDT | Areal Flood Advisory | ARX | 3 hr |
| May 18, 2:18 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 24, 1:35 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 24, 3:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 10:14 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 24, 11:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 10, 6:18 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Jul 10, 6:51 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 10, 9:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jul 13, 4:43 AM CDT | Dense Fog Advisory | ARX | 3 hr |
| Jul 13, 1:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 7:28 AM CDT | Special Weather Statement | ARX | 47 min |
| Jul 26, 2:04 PM CDT | Heat Advisory | ARX | 30 hr |
| Jul 28, 3:28 AM CDT | Heat Advisory | ARX | 16 hr |
| Jul 28, 4:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 2, 9:32 PM CDT | Dense Fog Advisory | ARX | 11 hr |
| Aug 4, 2:09 PM CDT | Special Weather Statement | ARX | 51 min |
| Aug 4, 5:43 PM CDT | Special Weather Statement | ARX | 32 min |
| Aug 11, 1:38 AM CDT | Special Weather Statement | ARX | 67 min |
| Aug 11, 2:23 AM CDT | Special Weather Statement | ARX | 52 min |
| Aug 11, 2:28 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 11, 4:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 6:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Aug 11, 8:32 PM CDT | Severe Thunderstorm Warning | ARX | 31 min |
| Aug 11, 9:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Aug 18, 2:12 PM CDT | Heat Advisory | ARX | 31 hr |
| Aug 20, 2:48 AM CDT | Excessive Heat Watch | ARX | 3 days |
| Aug 20, 2:12 PM CDT | Excessive Heat Warning | ARX | 4 days |
| Aug 20, 2:12 PM CDT | Heat Advisory | ARX | 13 hr |
| Sep 5, 8:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Sep 15, 9:36 PM CDT | Dense Fog Advisory | ARX | 11 hr |
| Sep 21, 5:24 AM CDT | Dense Fog Advisory | ARX | 4 hr |
| Sep 23, 3:39 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Oct 8, 1:42 PM CDT | Frost Advisory | ARX | 19 hr |
| Oct 9, 2:19 PM CDT | Frost Advisory | ARX | 19 hr |
| Oct 10, 1:47 PM CDT | Frost Advisory | ARX | 19 hr |
| Oct 23, 9:27 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 24, 10:06 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 24, 5:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Oct 27, 2:49 AM CDT | Freeze Warning | ARX | 29 hr |
| Nov 15, 2:10 PM CST | Wind Advisory | ARX | 29 hr |
| Dec 17, 1:47 PM CST | Wind Advisory | ARX | 16 hr |
| Dec 22, 3:00 PM CST | Dense Fog Advisory | ARX | 22 hr |
| Dec 30, 5:27 PM CST | Winter Weather Advisory | ARX | 16 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 | 2 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 23 |
| Special Weather Statement | 5 |
| Flooding | |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 4 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 13 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20222024
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.