Alert archive / Iowa / Black Hawk County
Weather alerts in Black Hawk County, Iowa, 2019
143 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 143
- Warnings
- 31
- Watches
- 36
- Advisories
- 40
- Busiest month
- January20 alerts
- Busiest day
- March 12, 20195 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, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 8 | 4 | 50% | 5 | 100% | 49 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Des Moines, IA: tornado warnings | 26 | 9 | 65% | 27 | 52% | 11 min |
| NWS Des Moines, IA: severe thunderstorm warnings | 253 | 104 | 59% | 288 | 76% | 19 min |
| NWS Des Moines, IA: flash flood warnings | 24 | 12 | 50% | 40 | 80% | 76 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 7, 3:09 PM CST | Wind Advisory | DMX | 30 hr |
| Jan 14, 2:30 AM CST | Dense Fog Advisory | DMX | 5 hr |
| Jan 14, 6:53 PM CST | Winter Weather Advisory | DMX | 15 hr |
| Jan 17, 4:15 AM CST | Winter Weather Advisory | DMX | 9 hr |
| Jan 17, 1:01 PM CST | Winter Storm Warning | DMX | 39 hr |
| Jan 18, 9:52 AM CST | Winter Weather Advisory | DMX | 22 hr |
| Jan 18, 5:54 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 21, 4:15 AM CST | Winter Weather Advisory | DMX | 54 hr |
| Jan 21, 3:24 PM CST | Winter Storm Warning | DMX | 13 hr |
| Jan 22, 3:55 AM CST | Winter Storm Warning | DMX | 29 hr |
| Jan 23, 3:22 PM CST | Wind Chill Watch | DMX | 12 hr |
| Jan 23, 3:22 PM CST | Wind Chill Advisory | DMX | 42 hr |
| Jan 23, 3:22 PM CST | Winter Weather Advisory | DMX | 27 hr |
| Jan 26, 3:46 AM CST | Winter Storm Watch | DMX | 12 hr |
| Jan 26, 3:49 PM CST | Winter Storm Warning | DMX | 44 hr |
| Jan 27, 4:26 AM CST | Wind Chill Watch | DMX | 49 hr |
| Jan 28, 4:04 AM CST | Wind Chill Warning | DMX | 3 days |
| Jan 28, 4:04 AM CST | Wind Chill Advisory | DMX | 38 hr |
| Jan 28, 12:21 PM CST | Winter Weather Advisory | DMX | 3 hr |
| Jan 30, 3:49 AM CST | Wind Chill Advisory | DMX | 13 hr |
| Feb 2, 9:27 AM CST | Dense Fog Advisory | DMX | 39 hr |
| Feb 4, 3:35 PM CST | Winter Weather Advisory | DMX | 29 hr |
| Feb 5, 9:36 PM CST | Winter Weather Advisory | DMX | 54 hr |
| Feb 7, 3:34 PM CST | Wind Chill Advisory | DMX | 20 hr |
| Feb 9, 2:58 PM CST | Winter Weather Advisory | DMX | 27 hr |
| Feb 10, 3:43 PM CST | Winter Storm Watch | DMX | 12 hr |
| Feb 11, 3:54 AM CST | Winter Storm Warning | DMX | 41 hr |
| Feb 14, 3:53 AM CST | Wind Chill Advisory | DMX | 29 hr |
| Feb 15, 2:56 PM CST | Winter Weather Advisory | DMX | 51 hr |
| Feb 17, 12:46 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Feb 19, 3:29 AM CST | Winter Storm Warning | DMX | 36 hr |
| Feb 21, 3:13 PM CST | Winter Storm Watch | DMX | 25 hr |
| Feb 22, 4:07 AM CST | Winter Weather Advisory | DMX | 38 hr |
| Feb 22, 3:43 PM CST | Winter Weather Advisory | DMX | 53 hr |
| Feb 26, 8:32 PM CST | Winter Weather Advisory | DMX | 9 hr |
| Mar 2, 3:08 AM CST | Wind Chill Advisory | DMX | 57 hr |
| Mar 2, 3:52 PM CST | Wind Chill Advisory | DMX | 44 hr |
| Mar 9, 3:31 PM CST | Wind Advisory | DMX | 14 hr |
| Mar 11, 3:16 PM CDT | Flood Watch | DMX | 67 hr |
| Mar 12, 10:53 AM CDT | River Flood Watch | DMX | 56 hr |
| Mar 12, 10:53 AM CDT | River Flood Watch | DMX | 21 days |
| Mar 12, 10:53 AM CDT | River Flood Watch | DMX | 21 days |
| Mar 12, 10:53 AM CDT | River Flood Watch | DMX | 6 days |
| Mar 12, 3:39 PM CDT | Dense Fog Advisory | DMX | 45 hr |
| Mar 13, 12:04 PM CDT | River Flood Warning | DMX | 5 days |
| Mar 13, 3:19 PM CDT | Areal Flood Warning | DMX | 24 hr |
| Mar 14, 10:38 AM CDT | Areal Flood Warning | DMX | 36 hr |
| Mar 14, 11:50 AM CDT | River Flood Warning | DMX | 13 days |
| Mar 14, 11:50 AM CDT | River Flood Warning | DMX | 10 days |
| Mar 14, 2:58 PM CDT | River Flood Watch | DMX | 52 hr |
| Mar 14, 6:24 PM CDT | River Flood Warning | DMX | 27 hr |
| Mar 14, 9:10 PM CDT | River Flood Warning | DMX | 3 days |
| Mar 15, 8:41 PM CDT | Areal Flood Warning | DMX | 24 hr |
| Mar 16, 8:20 PM CDT | Areal Flood Warning | DMX | 24 hr |
| Apr 5, 2:56 AM CDT | Dense Fog Advisory | DMX | 6 hr |
| Apr 9, 12:38 PM CDT | River Flood Watch | DMX | 8 days |
| Apr 10, 4:25 AM CDT | Wind Advisory | DMX | 39 hr |
| Apr 17, 5:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 22, 2:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 26, 3:24 PM CDT | Winter Storm Warning | DMX | 24 hr |
| Apr 26, 3:24 PM CDT | Winter Weather Advisory | DMX | 24 hr |
| Apr 27, 3:40 PM CDT | Freeze Warning | DMX | 17 hr |
| May 5, 1:35 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 5, 3:12 PM CDT | Special Weather Statement | DMX | 63 min |
| May 16, 7:57 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 16, 11:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 18, 3:59 AM CDT | Flash Flood Watch | DMX | 21 hr |
| May 20, 3:51 PM CDT | Wind Advisory | DMX | 30 hr |
| May 24, 7:46 AM CDT | Severe Thunderstorm Warning | DMX | 31 min |
| May 24, 10:35 AM CDT | River Flood Watch | DMX | 23 hr |
| May 24, 10:35 AM CDT | River Flood Watch | DMX | 34 hr |
| May 24, 10:36 AM CDT | River Flood Warning | DMX | 8 days |
| May 24, 3:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| May 24, 7:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 7:40 PM CDT | River Flood Watch | DMX | 40 hr |
| May 26, 7:40 PM CDT | River Flood Watch | DMX | 49 hr |
| May 29, 6:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| May 31, 6:39 PM CDT | Special Weather Statement | DMX | 51 min |
| Jun 4, 4:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 1:20 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 15, 3:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 15, 5:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jun 27, 11:14 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 27, 12:23 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 27, 1:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 27, 5:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 28, 3:21 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 7:38 AM CDT | Special Weather Statement | DMX | 67 min |
| Jun 28, 3:18 PM CDT | Heat Advisory | DMX | 30 hr |
| Jun 29, 3:37 PM CDT | Heat Advisory | DMX | 29 hr |
| Jun 30, 3:20 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 30, 4:27 PM CDT | Severe Thunderstorm Warning | DMX | 48 min |
| Jun 30, 5:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 2, 3:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 15, 3:40 PM CDT | Excessive Heat Watch | DMX | 48 hr |
| Jul 16, 3:08 PM CDT | Excessive Heat Warning | DMX | 4 days |
| Jul 17, 3:23 AM CDT | Flash Flood Watch | DMX | 27 hr |
| Jul 17, 9:09 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 17, 10:38 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 17, 12:59 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 10:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 12:18 PM CDT | Special Weather Statement | DMX | 57 min |
| Aug 5, 3:16 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 5, 6:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 9:44 PM CDT | Special Weather Statement | DMX | 31 min |
| Aug 18, 12:00 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Aug 18, 2:23 AM CDT | Special Weather Statement | DMX | 52 min |
| Sep 2, 6:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Sep 9, 2:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Sep 9, 3:32 PM CDT | Tornado Watch | SPC | 6 hr |
| Sep 9, 6:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Sep 9, 6:25 PM CDT | Severe Thunderstorm Warning | DMX | 65 min |
| Sep 9, 7:10 PM CDT | Severe Thunderstorm Warning | DMX | 50 min |
| Sep 9, 7:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Sep 9, 8:03 PM CDT | Severe Thunderstorm Warning | DMX | 57 min |
| Sep 9, 8:58 PM CDT | Severe Thunderstorm Warning | DMX | 32 min |
| Sep 12, 3:53 AM CDT | Flash Flood Watch | DMX | 15 hr |
| Sep 12, 1:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 12, 3:40 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 16, 3:49 AM CDT | Dense Fog Advisory | DMX | 6 hr |
| Sep 18, 2:01 PM CDT | Special Weather Statement | DMX | 29 min |
| Sep 18, 2:45 PM CDT | Severe Thunderstorm Warning | DMX | 15 min |
| Sep 18, 7:40 PM CDT | Flash Flood Watch | DMX | 14 hr |
| Sep 27, 3:49 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 30, 4:03 AM CDT | Flash Flood Watch | DMX | 47 hr |
| Sep 30, 10:57 AM CDT | River Flood Watch | DMX | 7 days |
| Sep 30, 10:57 AM CDT | River Flood Watch | DMX | 6 days |
| Oct 1, 2:45 PM CDT | Tornado Watch | SPC | 7 hr |
| Oct 1, 5:53 PM CDT | Severe Thunderstorm Warning | DMX | 31 min |
| Oct 1, 6:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Oct 6, 10:24 AM CDT | River Flood Watch | DMX | 23 hr |
| Oct 7, 3:59 AM CDT | River Flood Warning | DMX | 54 hr |
| Oct 10, 4:02 AM CDT | Freeze Watch | DMX | 24 hr |
| Oct 11, 3:43 AM CDT | Freeze Warning | DMX | 29 hr |
| Oct 12, 9:35 AM CDT | Wind Advisory | DMX | 9 hr |
| Oct 18, 3:25 AM CDT | Wind Advisory | DMX | 15 hr |
| Oct 19, 8:30 PM CDT | Dense Fog Advisory | DMX | 13 hr |
| Oct 20, 9:17 PM CDT | Wind Advisory | DMX | 45 hr |
| Nov 10, 1:26 PM CST | Winter Weather Advisory | DMX | 23 hr |
| Nov 26, 4:26 AM CST | Wind Advisory | DMX | 32 hr |
| Nov 26, 2:52 PM CST | High Wind Warning | DMX | 21 hr |
| Nov 27, 12:14 PM CST | Wind Advisory | DMX | 3 hr |
| Dec 9, 3:26 AM CST | Winter Weather Advisory | DMX | 10 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.