Alert archive / Iowa / 2009
Weather alerts in Iowa, September 2009
29 weather alerts in September 2009, 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 September 2009. Tap one for its archive.
- Alerts
- 29
- Warnings
- 2
- Watches
- 1
- Advisories
- 23
- Busiest day
- September 26, 20098 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 |
|---|---|---|---|---|
| Sep 5, 6:59 AM CDT | Dense Fog Advisory | OAX | Fremont, Page | 2 hr |
| Sep 6, 11:22 PM CDT | Dense Fog Advisory | DVN | Des Moines, Lee | 10 hr |
| Sep 7, 5:11 AM CDT | Dense Fog Advisory | DMX | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 23 more | 5 hr |
| Sep 7, 5:17 AM CDT | Dense Fog Advisory | OAX | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 5 hr |
| Sep 8, 7:18 AM CDT | Dense Fog Advisory | DMX | Appanoose, Boone, Calhoun, Carroll, Clarke, Dallas and 10 more | 3 hr |
| Sep 9, 9:22 PM CDT | Dense Fog Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 13 hr |
| Sep 10, 6:30 AM CDT | Dense Fog Advisory | DMX | Appanoose, Black Hawk, Boone, Bremer, Butler, Cerro Gordo and 22 more | 4 hr |
| Sep 10, 6:37 AM CDT | Dense Fog Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Winneshiek | 3 hr |
| Sep 10, 3:10 PM CDT | Dense Fog Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 18 hr |
| Sep 10, 8:40 PM CDT | Dense Fog Advisory | DMX | Adair, Appanoose, Audubon, Black Hawk, Boone, Bremer and 32 more | 13 hr |
| Sep 11, 3:27 PM CDT | Flash Flood Warning | FSD | Woodbury | 93 min |
| Sep 21, 3:25 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 33 min |
| Sep 21, 6:06 AM CDT | Dense Fog Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Howard, Winneshiek | 4 hr |
| Sep 23, 4:12 AM CDT | Dense Fog Advisory | DVN | Benton, Cedar, Clinton, Des Moines, Dubuque, Henry and 13 more | 6 hr |
| Sep 23, 6:34 AM CDT | Dense Fog Advisory | OAX | Harrison, Monona, Pottawattamie, Shelby | 2 hr |
| Sep 26, 12:59 AM CDT | Dense Fog Advisory | DVN | Clinton, Delaware, Dubuque, Jackson, Jones, Scott | 6 hr |
| Sep 26, 3:33 AM CDT | Fire Weather Watch | FSD | 24 hr | |
| Sep 26, 7:11 AM CDT | Dense Fog Advisory | DVN | Clinton, Delaware, Dubuque, Jackson, Jones, Scott | 3 hr |
| Sep 26, 1:46 PM CDT | Special Weather Statement | DVN | Linn | 59 min |
| Sep 26, 2:26 PM CDT | Wind Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 30 hr |
| Sep 26, 3:26 PM CDT | Wind Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 52 hr |
| Sep 26, 3:45 PM CDT | Wind Advisory | OAX | Harrison, Monona, Pottawattamie, Shelby | 28 hr |
| Sep 26, 4:55 PM CDT | Special Weather Statement | DVN | Jones | 50 min |
| Sep 27, 5:32 PM CDT | Mesoscale Discussion | SPC | Cedar, Clinton, Des Moines, Jackson, Louisa, Muscatine and 1 more | 88 min |
| Sep 28, 9:38 AM CDT | Wind Advisory | DMX | Black Hawk, Boone, Bremer, Butler, Calhoun, Cerro Gordo and 18 more | 9 hr |
| Sep 28, 3:20 PM CDT | Frost Advisory | FSD | Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux and 1 more | 18 hr |
| Sep 29, 3:17 AM CDT | Frost Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 5 more | 24 hr |
| Sep 29, 4:02 AM CDT | Frost Advisory | ARX | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 28 hr |
| Sep 29, 3:38 PM CDT | Frost Advisory | DMX | Black Hawk, Bremer, Butler, Cerro Gordo, Franklin, Grundy and 9 more | 16 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 | 1 |
| Mesoscale Discussion | 1 |
| Special Weather Statement | 2 |
| Flooding | |
| Flash Flood Warning | 1 |
| Cold | |
| Frost Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 15 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Clinton County7
- Jackson County7
- Jones County7
- Dubuque County6
- Scott County6
- Des Moines County5
- Boone County5
- Cedar County5
- Delaware County5
- Linn County5
- Lee County4
- Appanoose County4
- Clarke County4
- Dallas County4
- Lucas County4
- Madison County4
- Wayne County4
- Story County4
- Benton County4
- Iowa County4
- Johnson County4
- Louisa County4
- Muscatine County4
- Black Hawk County4
- Bremer County4
- Butler County4
- Cerro Gordo County4
- Franklin County4
- Grundy County4
- Hardin County4
- Marshall County4
- Poweshiek County4
- Tama County4
- Allamakee County4
- Chickasaw County4
- Clayton County4
- Fayette County4
- Winneshiek County4
- Calhoun County3
- Carroll County3
59 more counties
- Davis County3
- Decatur County3
- Greene County3
- Guthrie County3
- Marion County3
- Monroe County3
- Pocahontas County3
- Polk County3
- Wapello County3
- Warren County3
- Webster County3
- Harrison County3
- Monona County3
- Pottawattamie County3
- Shelby County3
- Buchanan County3
- Henry County3
- Jefferson County3
- Keokuk County3
- Van Buren County3
- Washington County3
- Hamilton County3
- Floyd County3
- Hancock County3
- Wright County3
- Woodbury County3
- Plymouth County3
- Howard County3
- Fremont County2
- Page County2
- Adair County2
- Audubon County2
- Ringgold County2
- Sac County2
- Union County2
- Emmet County2
- Palo Alto County2
- Jasper County2
- Mahaska County2
- Cherokee County2
- Lyon County2
- O'Brien County2
- Osceola County2
- Sioux County2
- Mitchell County2
- Kossuth County2
- Winnebago County2
- Worth County2
- Adams County1
- Cass County1
- Crawford County1
- Taylor County1
- Mills County1
- Montgomery County1
- Buena Vista County1
- Clay County1
- Dickinson County1
- Ida County1
- Humboldt County1
Nearby
Alerts in force nowTornadoes on recordThe 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.