Alert archive / Iowa / Sioux County
Weather alerts in Sioux County, Iowa, 2009
126 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sioux County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 126
- Warnings
- 37
- Watches
- 21
- Advisories
- 31
- Busiest month
- July32 alerts
- Busiest day
- July 9, 200912 alerts
Over time
By month
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 2, 3:55 PM CST | Winter Weather Advisory | FSD | 29 hr |
| Jan 8, 4:02 AM CST | Winter Weather Advisory | FSD | 24 hr |
| Jan 11, 4:33 AM CST | Blizzard Watch | FSD | 24 hr |
| Jan 11, 2:50 PM CST | Winter Weather Advisory | FSD | 30 hr |
| Jan 12, 10:56 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 12, 6:27 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 12, 6:40 PM CST | Wind Chill Advisory | FSD | 11 hr |
| Jan 13, 3:17 PM CST | Wind Chill Advisory | FSD | 33 hr |
| Jan 23, 3:33 AM CST | Wind Chill Advisory | FSD | 32 hr |
| Feb 9, 2:58 PM CST | Wind Advisory | FSD | 15 hr |
| Feb 11, 9:46 AM CST | River Flood Warning | FSD | 3 days |
| Feb 25, 11:07 AM CST | Winter Weather Advisory | FSD | 29 hr |
| Feb 26, 6:33 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Mar 6, 3:39 PM CST | Winter Weather Advisory | FSD | 44 hr |
| Mar 7, 8:09 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Mar 9, 3:44 AM CDT | Dense Fog Advisory | FSD | 6 hr |
| Mar 9, 10:01 AM CDT | Dense Fog Advisory | FSD | 119 min |
| Mar 9, 4:05 PM CDT | Winter Weather Advisory | FSD | 12 hr |
| Mar 9, 6:46 PM CDT | Winter Weather Advisory | FSD | 4 hr |
| Mar 10, 2:51 PM CDT | Wind Chill Advisory | FSD | 21 hr |
| Mar 22, 3:44 AM CDT | Wind Advisory | FSD | 44 hr |
| Mar 22, 11:09 AM CDT | River Flood Warning | FSD | 24 hr |
| Mar 23, 3:50 PM CDT | Tornado Watch | SPC | 6 hr |
| Mar 23, 6:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Mar 23, 6:17 PM CDT | Severe Thunderstorm Warning | FSD | 43 min |
| Mar 23, 6:44 PM CDT | Severe Thunderstorm Warning | FSD | 46 min |
| Mar 28, 3:59 PM CDT | Winter Storm Watch | FSD | 36 hr |
| Mar 30, 11:16 AM CDT | Wind Advisory | FSD | 8 hr |
| Mar 31, 1:26 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 2, 3:24 PM CDT | Winter Storm Watch | FSD | 30 hr |
| Apr 3, 10:40 AM CDT | Blizzard Warning | FSD | 41 hr |
| Apr 3, 4:05 PM CDT | Blizzard Watch | FSD | 6 hr |
| Apr 3, 9:45 PM CDT | Winter Weather Advisory | FSD | 39 hr |
| Apr 4, 9:11 PM CDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 20, 10:33 AM CDT | Wind Advisory | FSD | 8 hr |
| Apr 23, 3:29 AM CDT | Wind Advisory | FSD | 16 hr |
| Apr 25, 1:08 AM CDT | Severe Thunderstorm Warning | FSD | 52 min |
| Apr 26, 9:34 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 6, 1:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| May 12, 3:49 PM CDT | Wind Advisory | FSD | 30 hr |
| May 16, 3:51 AM CDT | Frost Advisory | FSD | 26 hr |
| May 19, 3:18 PM CDT | Wind Advisory | FSD | 28 hr |
| Jun 7, 11:16 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jun 16, 8:47 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 17, 3:59 AM CDT | Dense Fog Advisory | FSD | 5 hr |
| Jun 17, 5:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 17, 6:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 18, 4:20 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 18, 5:43 AM CDT | Severe Thunderstorm Warning | FSD | 47 min |
| Jun 18, 6:41 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 18, 6:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 21, 12:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 21, 3:17 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 21, 4:56 PM CDT | Tornado Warning | FSD | 34 min |
| Jun 21, 5:33 PM CDT | Tornado Warning | FSD | 27 min |
| Jun 21, 5:56 PM CDT | Tornado Warning | FSD | 49 min |
| Jun 22, 3:41 PM CDT | Heat Advisory | FSD | 22 hr |
| Jun 23, 8:01 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 23, 11:31 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 24, 10:53 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 24, 11:53 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 25, 12:24 AM CDT | Severe Thunderstorm Warning | FSD | 36 min |
| Jun 25, 12:54 AM CDT | Severe Thunderstorm Warning | FSD | 51 min |
| Jun 26, 11:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jul 7, 1:47 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 7, 2:13 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 7, 6:12 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 7, 6:33 PM CDT | Mesoscale Discussion | SPC | 27 min |
| Jul 7, 7:51 PM CDT | Severe Thunderstorm Warning | FSD | 39 min |
| Jul 7, 8:02 PM CDT | Severe Thunderstorm Warning | FSD | 43 min |
| Jul 7, 8:39 PM CDT | Flash Flood Warning | FSD | 3 hr |
| Jul 7, 8:44 PM CDT | Severe Thunderstorm Warning | FSD | 46 min |
| Jul 7, 8:58 PM CDT | Severe Thunderstorm Warning | FSD | 32 min |
| Jul 7, 9:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 7, 9:44 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 9, 3:07 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 9, 3:41 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 9, 5:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 9, 11:14 AM CDT | Severe Thunderstorm Warning | FSD | 31 min |
| Jul 9, 12:07 PM CDT | Flash Flood Watch | FSD | 21 hr |
| Jul 9, 2:02 PM CDT | Severe Thunderstorm Warning | FSD | 28 min |
| Jul 9, 2:29 PM CDT | Severe Thunderstorm Warning | FSD | 31 min |
| Jul 9, 2:48 PM CDT | Severe Thunderstorm Warning | FSD | 27 min |
| Jul 9, 2:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 9, 3:14 PM CDT | Severe Thunderstorm Warning | FSD | 17 min |
| Jul 9, 6:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jul 9, 6:48 PM CDT | Severe Thunderstorm Warning | FSD | 42 min |
| Jul 9, 7:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 9, 7:19 PM CDT | Severe Thunderstorm Warning | FSD | 41 min |
| Jul 9, 11:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 10, 5:10 AM CDT | Severe Thunderstorm Warning | FSD | 35 min |
| Jul 10, 5:37 AM CDT | Flash Flood Warning | FSD | 2 hr |
| Jul 12, 7:34 AM CDT | Mesoscale Discussion | SPC | 56 min |
| Jul 14, 1:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 14, 2:40 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 21, 12:20 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jul 31, 7:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 2, 8:32 PM CDT | Mesoscale Discussion | SPC | 28 min |
| Aug 2, 8:41 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 2, 9:16 PM CDT | Severe Thunderstorm Warning | FSD | 44 min |
| Aug 2, 10:57 PM CDT | Severe Thunderstorm Warning | FSD | 48 min |
| Aug 2, 11:12 PM CDT | Severe Thunderstorm Warning | FSD | 33 min |
| Aug 2, 11:21 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 2, 11:26 PM CDT | Severe Thunderstorm Warning | FSD | 34 min |
| Aug 3, 6:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 7, 3:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 12, 4:03 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 19, 4:57 PM CDT | Severe Thunderstorm Warning | FSD | 33 min |
| Aug 19, 5:19 PM CDT | Mesoscale Discussion | SPC | 26 min |
| Aug 19, 5:31 PM CDT | Severe Thunderstorm Warning | FSD | 29 min |
| Aug 19, 5:32 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 26, 2:26 PM CDT | Wind Advisory | FSD | 30 hr |
| Sep 28, 3:20 PM CDT | Frost Advisory | FSD | 18 hr |
| Oct 9, 3:46 AM CDT | Freeze Warning | FSD | 29 hr |
| Oct 11, 4:01 AM CDT | Winter Weather Advisory | FSD | 30 hr |
| Dec 6, 3:33 PM CST | Winter Storm Watch | FSD | 23 hr |
| Dec 7, 2:59 PM CST | Winter Storm Warning | FSD | 23 hr |
| Dec 8, 1:33 PM CST | Blizzard Warning | FSD | 25 hr |
| Dec 8, 9:38 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 9, 4:10 AM CST | Wind Chill Advisory | FSD | 30 hr |
| Dec 21, 2:02 PM CST | Winter Storm Watch | FSD | 24 hr |
| Dec 21, 4:39 PM CST | Freezing Rain Advisory | FSD | 3 hr |
| Dec 22, 4:30 AM CST | Winter Storm Warning | FSD | 4 days |
| Dec 23, 4:48 AM CST | Winter Weather Advisory | FSD | 13 hr |
| Dec 24, 3:31 PM CST | Blizzard Warning | FSD | 44 hr |
| Dec 26, 3:56 AM CST | Winter Weather Advisory | FSD | 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 | 24 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 12 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 37 |
| Flooding | |
| Flash Flood Warning | 2 |
| River Flood Warning | 2 |
| Flash Flood Watch | 1 |
| Winter | |
| Blizzard Warning | 3 |
| Winter Storm Warning | 2 |
| Blizzard Watch | 2 |
| Winter Storm Watch | 4 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 5 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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. Rebuilt daily.