Alert archive / Iowa / Sac County
Weather alerts in Sac County, Iowa, 2014
163 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sac County and its neighbors
Each county as a circle sized by its count in 2014. Tap one for its archive.
- Alerts
- 163
- Warnings
- 34
- Watches
- 28
- Advisories
- 45
- Busiest month
- June52 alerts
- Busiest day
- June 30, 201415 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Sac County, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 20 | 9 | 55% | 4 | 100% | 28 min |
| Flash flood warnings | 3 | 1 | 67% | 0 |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Des Moines, IA: tornado warnings | 57 | 15 | 74% | 46 | 48% | 12 min |
| NWS Des Moines, IA: severe thunderstorm warnings | 301 | 149 | 50% | 487 | 85% | 25 min |
| NWS Des Moines, IA: flash flood warnings | 62 | 29 | 53% | 69 | 84% | 111 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, 3:26 PM CST | Wind Chill Advisory | DMX | 21 hr |
| Jan 2, 4:16 PM CST | Wind Chill Advisory | DMX | 17 hr |
| Jan 3, 11:22 AM CST | Winter Weather Advisory | DMX | 7 hr |
| Jan 3, 3:36 PM CST | Wind Chill Watch | DMX | 13 hr |
| Jan 4, 4:14 AM CST | Wind Chill Warning | DMX | 72 hr |
| Jan 6, 3:39 PM CST | Wind Chill Advisory | DMX | 17 hr |
| Jan 13, 3:07 PM CST | Wind Advisory | DMX | 27 hr |
| Jan 14, 3:48 PM CST | High Wind Watch | DMX | 24 hr |
| Jan 15, 3:51 PM CST | High Wind Warning | DMX | 29 hr |
| Jan 17, 3:52 PM CST | Winter Weather Advisory | DMX | 24 hr |
| Jan 17, 3:55 PM CST | Wind Advisory | DMX | 26 hr |
| Jan 20, 3:42 AM CST | Wind Chill Advisory | DMX | 32 hr |
| Jan 22, 4:07 AM CST | Wind Chill Warning | DMX | 32 hr |
| Jan 25, 4:09 AM CST | High Wind Watch | DMX | 11 hr |
| Jan 25, 3:35 PM CST | High Wind Warning | DMX | 31 hr |
| Jan 25, 3:35 PM CST | Wind Advisory | DMX | 32 hr |
| Jan 26, 4:45 AM CST | Wind Chill Warning | DMX | 53 hr |
| Jan 28, 3:57 AM CST | Wind Chill Advisory | DMX | 14 hr |
| Feb 3, 3:45 PM CST | Winter Weather Advisory | DMX | 41 hr |
| Feb 5, 3:18 PM CST | Wind Chill Advisory | DMX | 21 hr |
| Feb 6, 3:33 PM CST | Wind Chill Advisory | DMX | 17 hr |
| Feb 9, 3:40 AM CST | Wind Chill Advisory | DMX | 31 hr |
| Feb 16, 4:52 AM CST | Winter Weather Advisory | DMX | 31 hr |
| Feb 18, 4:06 AM CST | Blizzard Watch | DMX | 36 hr |
| Feb 19, 4:54 AM CST | Blizzard Warning | DMX | 49 hr |
| Feb 19, 3:43 PM CST | Winter Storm Warning | DMX | 13 hr |
| Feb 19, 3:43 PM CST | Winter Weather Advisory | DMX | 38 hr |
| Feb 20, 11:20 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 25, 3:54 AM CST | Wind Chill Advisory | DMX | 31 hr |
| Feb 26, 3:55 AM CST | Winter Weather Advisory | DMX | 23 hr |
| Feb 26, 4:06 PM CST | Wind Chill Advisory | DMX | 19 hr |
| Feb 27, 3:56 PM CST | Wind Chill Advisory | DMX | 16 hr |
| Feb 28, 4:26 PM CST | Wind Chill Advisory | DMX | 63 hr |
| Feb 28, 4:26 PM CST | Winter Weather Advisory | DMX | 35 hr |
| Mar 1, 3:36 PM CST | Wind Chill Warning | DMX | 20 hr |
| Mar 26, 3:37 AM CDT | Wind Advisory | DMX | 16 hr |
| Mar 31, 3:58 AM CDT | Wind Advisory | DMX | 27 hr |
| Apr 3, 3:54 PM CDT | Wind Advisory | DMX | 23 hr |
| Apr 9, 3:56 AM CDT | Red Flag Warning | DMX | 15 hr |
| Apr 12, 2:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 12, 3:15 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 12, 6:20 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Apr 12, 7:39 PM CDT | Severe Thunderstorm Warning | DMX | 36 min |
| Apr 12, 8:15 PM CDT | Severe Thunderstorm Warning | DMX | 30 min |
| Apr 12, 8:17 PM CDT | Severe Thunderstorm Warning | DMX | 28 min |
| Apr 12, 8:43 PM CDT | Severe Thunderstorm Warning | DMX | 32 min |
| Apr 12, 9:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Apr 12, 9:38 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 13, 1:16 PM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 13, 3:44 PM CDT | Wind Advisory | DMX | 8 hr |
| Apr 23, 3:53 AM CDT | Wind Advisory | DMX | 14 hr |
| Apr 27, 4:18 AM CDT | Wind Advisory | DMX | 17 hr |
| Apr 27, 1:59 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Apr 28, 8:30 AM CDT | Special Weather Statement | DMX | 60 min |
| Apr 28, 12:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 7, 9:35 PM CDT | Severe Thunderstorm Warning | DMX | 40 min |
| May 7, 9:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| May 7, 9:57 PM CDT | Severe Thunderstorm Warning | DMX | 48 min |
| May 8, 1:13 AM CDT | Special Weather Statement | DMX | 32 min |
| May 8, 12:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 8, 1:46 PM CDT | Tornado Watch | SPC | 7 hr |
| May 8, 5:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 10, 5:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| May 11, 9:16 AM CDT | Mesoscale Discussion | SPC | 89 min |
| May 11, 3:32 PM CDT | Flash Flood Watch | DMX | 15 hr |
| May 11, 7:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 11, 7:49 PM CDT | Tornado Watch | SPC | 7 hr |
| May 11, 9:15 PM CDT | Severe Thunderstorm Warning | DMX | 45 min |
| May 11, 9:31 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 11, 11:01 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 15, 3:45 PM CDT | Frost Advisory | DMX | 15 hr |
| May 16, 3:21 PM CDT | Frost Advisory | DMX | 16 hr |
| May 19, 7:55 AM CDT | Special Weather Statement | DMX | 35 min |
| Jun 1, 3:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 1, 4:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 1, 5:13 PM CDT | Severe Thunderstorm Warning | DMX | 47 min |
| Jun 3, 4:17 AM CDT | Flash Flood Watch | DMX | 23 hr |
| Jun 5, 1:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 5, 4:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 5, 4:55 PM CDT | Tornado Watch | SPC | 4 hr |
| Jun 5, 8:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 14, 10:29 AM CDT | Special Weather Statement | DMX | 61 min |
| Jun 14, 3:47 PM CDT | Flash Flood Watch | DMX | 13 hr |
| Jun 14, 10:30 PM CDT | Special Weather Statement | DMX | 45 min |
| Jun 14, 11:46 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 15, 3:00 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 16, 10:19 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 16, 12:25 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 16, 1:13 PM CDT | Severe Thunderstorm Warning | DMX | 32 min |
| Jun 16, 3:11 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 3:28 PM CDT | Flash Flood Watch | DMX | 12 hr |
| Jun 16, 5:37 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 16, 9:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 16, 9:56 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 16, 11:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 16, 11:42 PM CDT | Severe Thunderstorm Warning | DMX | 63 min |
| Jun 17, 3:59 PM CDT | Flash Flood Watch | DMX | 15 hr |
| Jun 17, 11:39 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 18, 1:52 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 19, 1:03 PM CDT | Special Weather Statement | DMX | 87 min |
| Jun 19, 1:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 19, 1:19 PM CDT | Flash Flood Warning | DMX | 6 hr |
| Jun 20, 5:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 20, 5:44 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 20, 8:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 22, 3:50 AM CDT | Flash Flood Watch | DMX | 12 hr |
| Jun 26, 2:54 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 28, 1:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 2:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 29, 4:04 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 29, 7:32 PM CDT | Flash Flood Watch | DMX | 22 hr |
| Jun 30, 2:30 AM CDT | Severe Thunderstorm Warning | DMX | 60 min |
| Jun 30, 3:32 AM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 30, 4:06 AM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 30, 6:09 AM CDT | Flash Flood Warning | DMX | 10 hr |
| Jun 30, 7:16 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 30, 9:12 AM CDT | Severe Thunderstorm Warning | DMX | 48 min |
| Jun 30, 9:37 AM CDT | Severe Thunderstorm Warning | DMX | 38 min |
| Jun 30, 9:38 AM CDT | Tornado Watch | SPC | 10 hr |
| Jun 30, 10:13 AM CDT | Severe Thunderstorm Warning | DMX | 47 min |
| Jun 30, 10:48 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 30, 10:59 AM CDT | Severe Thunderstorm Warning | DMX | 46 min |
| Jun 30, 11:06 AM CDT | Severe Thunderstorm Warning | DMX | 54 min |
| Jun 30, 11:42 AM CDT | Severe Thunderstorm Warning | DMX | 48 min |
| Jun 30, 1:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 5, 1:54 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 6, 4:44 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Jul 12, 2:52 AM CDT | Flash Flood Warning | DMX | 6 hr |
| Jul 20, 3:23 PM CDT | Heat Advisory | DMX | 52 hr |
| Jul 26, 9:44 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 4, 2:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 18, 6:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 20, 2:40 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 24, 9:47 PM CDT | Special Weather Statement | DMX | 28 min |
| Aug 27, 3:53 PM CDT | Flash Flood Watch | DMX | 19 hr |
| Aug 31, 2:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 31, 3:31 PM CDT | Tornado Watch | SPC | 5 hr |
| Aug 31, 6:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 31, 6:24 PM CDT | Severe Thunderstorm Warning | DMX | 51 min |
| Aug 31, 7:29 PM CDT | Severe Thunderstorm Warning | DMX | 46 min |
| Sep 8, 3:42 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 9, 3:56 AM CDT | Flash Flood Watch | DMX | 24 hr |
| Sep 12, 3:28 PM CDT | Frost Advisory | DMX | 17 hr |
| Sep 18, 9:12 AM CDT | Special Weather Statement | DMX | 63 min |
| Sep 19, 6:19 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 19, 11:33 PM CDT | Severe Thunderstorm Warning | DMX | 17 min |
| Sep 19, 11:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 20, 12:54 AM CDT | Special Weather Statement | DMX | 51 min |
| Oct 1, 11:12 PM CDT | Dense Fog Advisory | DMX | 10 hr |
| Oct 2, 3:28 PM CDT | Wind Advisory | DMX | 24 hr |
| Oct 3, 3:53 PM CDT | Freeze Warning | DMX | 16 hr |
| Oct 10, 3:15 PM CDT | Freeze Warning | DMX | 18 hr |
| Nov 7, 11:23 AM CST | Wind Advisory | DMX | 19 hr |
| Nov 10, 3:33 PM CST | Wind Advisory | DMX | 12 hr |
| Nov 14, 3:39 AM CST | Winter Weather Advisory | DMX | 44 hr |
| Nov 22, 8:37 AM CST | Dense Fog Advisory | DMX | 2 hr |
| Nov 23, 3:34 PM CST | Wind Advisory | DMX | 26 hr |
| Dec 13, 3:47 PM CST | Dense Fog Advisory | DMX | 40 hr |
| Dec 15, 3:33 PM CST | Wind Advisory | DMX | 14 hr |
| Dec 21, 12:24 AM CST | Dense Fog Advisory | DMX | 9 hr |
| Dec 26, 3:42 AM CST | Winter Weather Advisory | DMX | 29 hr |
| Dec 29, 3:48 AM CST | Wind Chill Advisory | DMX | 32 hr |
| Dec 30, 2:27 PM CST | Wind Chill Advisory | DMX | 20 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 | 20 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 9 |
| Mesoscale Discussion | 47 |
| Special Weather Statement | 9 |
| Flooding | |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 9 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 1 |
| Blizzard Watch | 1 |
| Winter Weather Advisory | 9 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Wind Chill Warning | 4 |
| Wind Chill Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 14 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 2 |
| Wind Advisory | 14 |
| Fire | |
| Red Flag Warning | 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 archive20132015
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.