Alert archive / Iowa / Humboldt County
Weather alerts in Humboldt County, Iowa, 2012
94 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Humboldt County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 94
- Warnings
- 24
- Watches
- 16
- Advisories
- 29
- Busiest month
- May20 alerts
- Busiest day
- May 4, 20125 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 1 tornado warnings covering Humboldt County in 2012 had a tornado report inside them.
Humboldt County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 0 | ||
| Severe thunderstorm warnings | 9 | 8 | 11% | 7 | 86% | 21 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Des Moines, IA: tornado warnings | 8 | 4 | 50% | 9 | 67% | 11 min |
| NWS Des Moines, IA: severe thunderstorm warnings | 183 | 129 | 30% | 337 | 85% | 19 min |
| NWS Des Moines, IA: flash flood warnings | 7 | 2 | 71% | 5 | 60% | 52 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, 3:35 PM CST | Wind Advisory | DMX | 8 hr |
| Jan 11, 4:10 AM CST | Wind Advisory | DMX | 35 hr |
| Jan 18, 3:46 AM CST | Wind Chill Advisory | DMX | 32 hr |
| Jan 19, 3:41 AM CST | Winter Storm Warning | DMX | 36 hr |
| Jan 22, 3:40 AM CST | Winter Weather Advisory | DMX | 32 hr |
| Feb 2, 4:34 AM CST | Winter Storm Watch | DMX | 35 hr |
| Feb 6, 10:05 AM CST | Dense Fog Advisory | DMX | 115 min |
| Feb 10, 3:48 PM CST | Wind Chill Advisory | DMX | 16 hr |
| Feb 22, 11:07 AM CST | Winter Storm Watch | DMX | 11 hr |
| Feb 22, 10:13 PM CST | Winter Storm Warning | DMX | 26 hr |
| Feb 26, 3:33 AM CST | Wind Advisory | DMX | 14 hr |
| Feb 27, 4:03 PM CST | Winter Weather Advisory | DMX | 21 hr |
| Feb 28, 3:38 PM CST | Wind Advisory | DMX | 26 hr |
| Feb 29, 9:52 AM CST | Winter Weather Advisory | DMX | 8 hr |
| Mar 19, 1:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Mar 23, 3:52 AM CDT | Dense Fog Advisory | DMX | 6 hr |
| Mar 26, 3:44 PM CDT | Wind Advisory | DMX | 27 hr |
| Mar 26, 4:00 PM CDT | Fire Weather Watch | DMX | 12 hr |
| Apr 1, 3:42 AM CDT | Dense Fog Advisory | DMX | 4 hr |
| Apr 5, 3:00 PM CDT | Frost Advisory | DMX | 16 hr |
| Apr 7, 3:41 PM CDT | Frost Advisory | DMX | 12 hr |
| Apr 8, 3:08 PM CDT | Freeze Watch | DMX | 24 hr |
| Apr 9, 3:49 AM CDT | Red Flag Warning | DMX | 15 hr |
| Apr 9, 3:51 AM CDT | Freeze Warning | DMX | 29 hr |
| Apr 9, 8:56 PM CDT | Freeze Warning | DMX | 36 hr |
| Apr 11, 3:32 PM CDT | Freeze Warning | DMX | 16 hr |
| Apr 14, 3:53 AM CDT | Dense Fog Advisory | DMX | 5 hr |
| Apr 15, 4:15 AM CDT | Wind Advisory | DMX | 33 hr |
| Apr 15, 1:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 27, 10:43 AM CDT | Wind Advisory | DMX | 10 hr |
| May 1, 9:18 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 1, 11:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 11:24 PM CDT | Severe Thunderstorm Warning | DMX | 51 min |
| May 3, 2:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 6:13 PM CDT | Severe Thunderstorm Warning | DMX | 47 min |
| May 3, 6:57 PM CDT | Severe Thunderstorm Warning | DMX | 48 min |
| May 3, 7:41 PM CDT | Severe Thunderstorm Warning | DMX | 28 min |
| May 4, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 4, 3:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| May 4, 5:31 PM CDT | Mesoscale Discussion | SPC | 29 min |
| May 4, 5:40 PM CDT | Tornado Warning | DMX | 35 min |
| May 6, 2:12 AM CDT | Mesoscale Discussion | SPC | 63 min |
| May 19, 6:52 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 19, 8:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| May 19, 10:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 23, 10:39 AM CDT | Wind Advisory | DMX | 8 hr |
| May 23, 4:07 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 23, 8:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 25, 9:17 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 26, 12:46 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 3, 8:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 10, 3:10 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jun 10, 3:42 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 10, 6:20 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jun 10, 10:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 14, 3:27 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 15, 5:19 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 20, 2:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 20, 5:42 PM CDT | Severe Thunderstorm Warning | DMX | 20 min |
| Jun 26, 3:47 PM CDT | Heat Advisory | DMX | 3 days |
| Jul 1, 3:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jul 2, 3:49 PM CDT | Heat Advisory | DMX | 48 hr |
| Jul 4, 4:08 PM CDT | Excessive Heat Warning | DMX | 3 days |
| Jul 13, 9:01 PM CDT | Severe Thunderstorm Warning | DMX | 44 min |
| Jul 20, 11:22 AM CDT | Excessive Heat Warning | DMX | 5 days |
| Jul 23, 8:50 PM CDT | Heat Advisory | DMX | 46 hr |
| Jul 25, 5:16 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 25, 7:09 PM CDT | Severe Thunderstorm Warning | DMX | 51 min |
| Jul 25, 7:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 29, 3:54 PM CDT | Red Flag Warning | DMX | 27 hr |
| Sep 4, 9:51 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Sep 4, 10:19 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 4, 10:47 PM CDT | Severe Thunderstorm Warning | DMX | 43 min |
| Sep 5, 12:14 AM CDT | Severe Thunderstorm Warning | DMX | 46 min |
| Sep 5, 1:14 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Sep 6, 9:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Sep 6, 11:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 10, 4:10 AM CDT | Fire Weather Watch | DMX | 11 hr |
| Sep 10, 3:24 PM CDT | Red Flag Warning | DMX | 28 hr |
| Sep 21, 2:54 PM CDT | Freeze Watch | DMX | 24 hr |
| Sep 22, 3:29 AM CDT | Freeze Warning | DMX | 29 hr |
| Oct 7, 3:37 PM CDT | Fire Weather Watch | DMX | 12 hr |
| Oct 8, 3:25 AM CDT | Red Flag Warning | DMX | 16 hr |
| Oct 23, 9:23 PM CDT | Dense Fog Advisory | DMX | 13 hr |
| Nov 21, 3:23 PM CST | Wind Advisory | DMX | 42 hr |
| Dec 1, 8:46 PM CST | Dense Fog Advisory | DMX | 17 hr |
| Dec 9, 3:28 PM CST | Wind Advisory | DMX | 9 hr |
| Dec 18, 11:15 AM CST | Winter Weather Advisory | DMX | 4 hr |
| Dec 18, 3:24 PM CST | Winter Storm Watch | DMX | 13 hr |
| Dec 18, 3:24 PM CST | Winter Storm Warning | DMX | 45 hr |
| Dec 19, 3:58 AM CST | Blizzard Warning | DMX | 41 hr |
| Dec 19, 2:08 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 20, 11:58 AM CST | Winter Weather Advisory | DMX | 9 hr |
| Dec 26, 3:36 PM CST | Winter Weather Advisory | DMX | 44 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 | 9 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 8 |
| Mesoscale Discussion | 25 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 6 |
| Heat | |
| Excessive Heat Warning | 2 |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 2 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 10 |
| Fire | |
| Red Flag Warning | 4 |
| Fire Weather Watch | 3 |
| 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 archive20112013
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.