Alert archive / Iowa / 2012
Weather alerts in Iowa, August 2012
104 weather alerts in August 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in August 2012. Tap one for its archive.
- Alerts
- 104
- Warnings
- 54
- Watches
- 10
- Advisories
- 7
- Busiest day
- August 8, 201231 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
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 | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 3:52 AM CDT | Heat Advisory | FSD | Lyon, Plymouth, Sioux, Woodbury | 15 hr |
| Aug 2, 3:22 AM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 38 min |
| Aug 3, 6:19 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Emmet, Lyon and 5 more | 86 min |
| Aug 3, 7:33 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 6 hr |
| Aug 3, 10:33 PM CDT | Mesoscale Discussion | SPC | Worth | 87 min |
| Aug 3, 10:43 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 32 min |
| Aug 4, 10:26 AM CDT | Mesoscale Discussion | SPC | Appanoose, Benton, Black Hawk, Boone, Bremer, Buchanan and 44 more | 49 min |
| Aug 4, 10:50 AM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Benton, Black Hawk, Buchanan, Cedar, Clinton and 27 more | 5 hr |
| Aug 4, 11:18 AM CDT | Special Weather Statement | DVN | Benton, Buchanan, Delaware, Henry, Iowa, Jefferson and 4 more | 102 min |
| Aug 4, 12:05 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Delaware, Iowa, Johnson, Keokuk and 2 more | 55 min |
| Aug 4, 12:38 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Delaware, Dubuque, Jackson, Johnson and 5 more | 67 min |
| Aug 4, 12:59 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa, Muscatine, Scott | 76 min |
| Aug 4, 1:09 PM CDT | Mesoscale Discussion | SPC | Benton, Buchanan, Cedar, Clayton, Clinton, Delaware and 15 more | 66 min |
| Aug 4, 1:19 PM CDT | Flash Flood Warning | DVN | Linn | 82 min |
| Aug 4, 1:39 PM CDT | Flash Flood Warning | DVN | Scott | 70 min |
| Aug 7, 7:45 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Cass | 45 min |
| Aug 7, 7:47 PM CDT | Severe Thunderstorm Warning | OAX | Mills | 43 min |
| Aug 7, 9:17 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 24 min |
| Aug 7, 9:39 PM CDT | Special Weather Statement | OAX | Harrison | 36 min |
| Aug 8, 3:22 AM CDT | Special Weather Statement | OAX | Page | 38 min |
| Aug 8, 10:47 AM CDT | Severe Thunderstorm Warning | FSD | Sioux | 28 min |
| Aug 8, 11:57 AM CDT | Special Weather Statement | OAX | Harrison | 48 min |
| Aug 8, 12:13 PM CDT | Special Weather Statement | OAX | Monona | 32 min |
| Aug 8, 12:28 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Calhoun, Carroll, Cass and 17 more | 62 min |
| Aug 8, 12:46 PM CDT | Special Weather Statement | OAX | Monona | 29 min |
| Aug 8, 1:06 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 26 min |
| Aug 8, 1:51 PM CDT | Special Weather Statement | OAX | Pottawattamie | 54 min |
| Aug 8, 2:00 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Greene | 45 min |
| Aug 8, 2:21 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 24 more | 6 hr |
| Aug 8, 2:37 PM CDT | Severe Thunderstorm Warning | DMX | Greene | 53 min |
| Aug 8, 3:01 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Greene, Guthrie | 43 min |
| Aug 8, 3:09 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Madison | 51 min |
| Aug 8, 3:30 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Story | 30 min |
| Aug 8, 3:54 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Polk | 38 min |
| Aug 8, 4:10 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 36 more | 95 min |
| Aug 8, 4:16 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk, Warren | 29 min |
| Aug 8, 4:45 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Winnebago | 36 min |
| Aug 8, 4:48 PM CDT | Severe Thunderstorm Warning | DMX | Worth | 27 min |
| Aug 8, 4:53 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 5 hr |
| Aug 8, 6:05 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin | 25 min |
| Aug 8, 6:09 PM CDT | Special Weather Statement | OAX | Mills | 36 min |
| Aug 8, 6:14 PM CDT | Severe Thunderstorm Warning | OAX | Mills | 31 min |
| Aug 8, 6:29 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin | 46 min |
| Aug 8, 6:32 PM CDT | Severe Thunderstorm Warning | OAX | Fremont | 28 min |
| Aug 8, 6:46 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Pottawattamie | 29 min |
| Aug 8, 6:56 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 34 min |
| Aug 8, 7:08 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Howard | 52 min |
| Aug 8, 7:15 PM CDT | Special Weather Statement | OAX | Pottawattamie | 30 min |
| Aug 8, 7:20 PM CDT | Severe Thunderstorm Warning | OAX | Page | 40 min |
| Aug 9, 4:49 PM CDT | Severe Thunderstorm Warning | ARX | Fayette, Winneshiek | 56 min |
| Aug 9, 4:55 PM CDT | Tornado Warning | ARX | Fayette, Winneshiek | 20 min |
| Aug 9, 5:11 PM CDT | Mesoscale Discussion | SPC | Benton, Black Hawk, Bremer, Buchanan, Butler, Cedar and 23 more | 94 min |
| Aug 9, 5:23 PM CDT | Special Weather Statement | DVN | Benton, Buchanan, Delaware, Linn | 67 min |
| Aug 9, 6:00 PM CDT | Special Weather Statement | DVN | Benton | 60 min |
| Aug 9, 6:43 PM CDT | Special Weather Statement | DVN | Iowa, Washington | 62 min |
| Aug 9, 6:44 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 16 min |
| Aug 9, 6:55 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Keokuk, Washington | 46 min |
| Aug 9, 7:07 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Jones | 38 min |
| Aug 12, 3:39 PM CDT | Mesoscale Discussion | SPC | Adams, Decatur, Ringgold, Taylor, Union | 2 hr |
| Aug 15, 2:56 PM CDT | Mesoscale Discussion | SPC | Clay, Dickinson, Emmet, Lyon, O'Brien, Osceola and 2 more | 64 min |
| Aug 15, 11:41 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 34 min |
| Aug 16, 12:02 AM CDT | Severe Thunderstorm Warning | OAX | Mills, Pottawattamie | 28 min |
| Aug 16, 12:22 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills | 23 min |
| Aug 16, 12:27 AM CDT | Severe Thunderstorm Warning | OAX | Mills | 33 min |
| Aug 16, 12:44 AM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery, Page | 31 min |
| Aug 16, 1:30 AM CDT | Severe Thunderstorm Warning | OAX | Monona | 30 min |
| Aug 16, 1:40 AM CDT | Special Weather Statement | OAX | Page | 20 min |
| Aug 16, 1:47 AM CDT | Severe Thunderstorm Warning | DMX | Crawford, Sac | 28 min |
| Aug 16, 1:59 AM CDT | Severe Thunderstorm Warning | OAX | Monona | 16 min |
| Aug 16, 2:15 AM CDT | Special Weather Statement | OAX | Shelby | 30 min |
| Aug 16, 2:40 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Guthrie | 35 min |
| Aug 16, 3:10 AM CDT | Severe Thunderstorm Warning | DMX | Dallas | 35 min |
| Aug 16, 3:37 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Polk | 23 min |
| Aug 16, 3:57 AM CDT | Mesoscale Discussion | SPC | Adair, Allamakee, Appanoose, Benton, Black Hawk, Boone and 52 more | 3 hr |
| Aug 19, 4:18 PM CDT | Special Weather Statement | DVN | Muscatine | 57 min |
| Aug 19, 4:43 PM CDT | Special Weather Statement | DVN | Louisa | 62 min |
| Aug 19, 4:48 PM CDT | Special Weather Statement | DVN | Jackson | 57 min |
| Aug 19, 4:55 PM CDT | Special Weather Statement | DVN | Iowa | 65 min |
| Aug 19, 5:08 PM CDT | Special Weather Statement | DVN | Keokuk | 67 min |
| Aug 19, 5:48 PM CDT | Special Weather Statement | DVN | Washington | 57 min |
| Aug 21, 3:18 PM CDT | Fire Weather Watch | OAX | Fremont, Page | 12 hr |
| Aug 21, 4:19 PM CDT | Fire Weather Watch | FSD | 11 hr | |
| Aug 22, 3:09 AM CDT | Red Flag Warning | OAX | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 16 hr |
| Aug 22, 3:28 AM CDT | Red Flag Warning | FSD | 17 hr | |
| Aug 23, 7:45 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 45 min |
| Aug 25, 5:54 AM CDT | Special Weather Statement | OAX | Montgomery, Page, Shelby | 66 min |
| Aug 25, 6:50 AM CDT | Special Weather Statement | OAX | Montgomery, Page, Pottawattamie, Shelby | 55 min |
| Aug 26, 2:25 AM CDT | Dense Fog Advisory | FSD | Lyon, Plymouth, Sioux, Woodbury | 9 hr |
| Aug 26, 3:05 AM CDT | Dense Fog Advisory | OAX | Harrison, Monona | 6 hr |
| Aug 27, 12:03 AM CDT | Dense Fog Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 10 hr |
| Aug 27, 12:06 AM CDT | Dense Fog Advisory | ARX | Allamakee, Clayton, Fayette, Winneshiek | 8 hr |
| Aug 27, 3:38 AM CDT | Dense Fog Advisory | DMX | Appanoose, Black Hawk, Boone, Carroll, Clarke, Crawford and 21 more | 5 hr |
| Aug 27, 5:28 AM CDT | Dense Fog Advisory | OAX | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 4 hr |
| Aug 28, 3:08 PM CDT | Fire Weather Watch | ARX | Floyd, Howard, Mitchell | 24 hr |
| Aug 28, 3:11 PM CDT | Red Flag Warning | OAX | Monona | 29 hr |
| Aug 28, 3:47 PM CDT | Fire Weather Watch | DMX | Cerro Gordo, Emmet, Hancock, Kossuth, Palo Alto, Winnebago and 1 more | 24 hr |
| Aug 28, 4:04 PM CDT | Fire Weather Watch | FSD | 36 hr | |
| Aug 29, 4:05 AM CDT | Red Flag Warning | FSD | 17 hr | |
| Aug 29, 9:51 AM CDT | Fire Weather Watch | OAX | Monona | 11 hr |
| Aug 29, 3:12 PM CDT | Red Flag Warning | FSD | 29 hr | |
| Aug 29, 3:28 PM CDT | Red Flag Warning | ARX | Floyd, Howard, Mitchell | 29 hr |
| Aug 29, 3:54 PM CDT | Red Flag Warning | DMX | Boone, Butler, Calhoun, Carroll, Cerro Gordo, Crawford and 16 more | 27 hr |
| Aug 29, 8:32 PM CDT | Red Flag Warning | OAX | Monona | 24 hr |
| Aug 31, 4:45 PM CDT | Special Weather Statement | DVN | Des Moines, Henry, Jefferson, Lee, Van Buren | 105 min |
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 | 43 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 10 |
| Special Weather Statement | 23 |
| Flooding | |
| Flash Flood Warning | 2 |
| Heat | |
| Heat Advisory | 1 |
| Fire | |
| Red Flag Warning | 8 |
| Fire Weather Watch | 6 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Mills County13
- Pottawattamie County13
- Page County13
- Iowa County12
- Washington County12
- Monona County12
- Benton County10
- Delaware County10
- Keokuk County10
- Linn County10
- Buchanan County9
- Jefferson County9
- Johnson County9
- Louisa County9
- Muscatine County9
- Scott County9
- Harrison County9
- Fremont County9
- Greene County9
- Boone County8
- Cedar County8
- Dallas County8
- Des Moines County8
- Henry County8
- Jackson County8
- Jasper County8
- Jones County8
- Polk County8
- Montgomery County8
- Shelby County8
- Butler County7
- Clinton County7
- Dubuque County7
- Marion County7
- Poweshiek County7
- Story County7
- Tama County7
- Van Buren County7
- Lyon County6
- Sioux County6
59 more counties
- Appanoose County6
- Davis County6
- Fayette County6
- Lee County6
- Madison County6
- Mahaska County6
- Marshall County6
- Monroe County6
- Wapello County6
- Warren County6
- Adair County6
- Carroll County6
- Guthrie County6
- Plymouth County5
- Black Hawk County5
- Clarke County5
- Clayton County5
- Decatur County5
- Franklin County5
- Grundy County5
- Lucas County5
- Crawford County5
- Ringgold County5
- Union County5
- Woodbury County4
- Dickinson County4
- Emmet County4
- Worth County4
- Wayne County4
- Cass County4
- Adams County4
- Audubon County4
- Calhoun County4
- Taylor County4
- Howard County4
- Winneshiek County4
- Allamakee County3
- Clay County3
- O'Brien County3
- Osceola County3
- Palo Alto County3
- Bremer County3
- Hamilton County3
- Hardin County3
- Sac County3
- Hancock County3
- Winnebago County3
- Cerro Gordo County3
- Chickasaw County3
- Floyd County3
- Buena Vista County2
- Cherokee County2
- Ida County2
- Webster County2
- Wright County2
- Mitchell County2
- Kossuth County2
- Humboldt County1
- Pocahontas County1
Nearby
Alerts in force nowTornadoes on recordThe 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. Rebuilt daily.