Weather alerts in Iowa, 2011
1,822 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 1,822
- Warnings
- 1,169
- Watches
- 133
- Advisories
- 271
- Busiest month
- June524 alerts
- Busiest day
- June 27, 201182 alerts
Over time
By month
The alerts
1,822 alerts are too many to list on one page. Narrow it to a product above, to a month in the chart, or to a county.
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Pottawattamie County173
- Mills County168
- Fremont County167
- Lee County161
- Harrison County151
- Page County148
- Des Moines County146
- Mahaska County145
- Monona County144
- Madison County144
- Montgomery County139
- Louisa County138
- Warren County137
- Washington County136
- Adams County135
- Marion County135
- Johnson County135
- Adair County133
- Lucas County132
- Polk County132
- Van Buren County132
- Keokuk County131
- Woodbury County130
- Shelby County130
- Linn County130
- Audubon County129
- Cass County129
- Appanoose County129
- Clay County127
- Wayne County127
- Iowa County127
- Guthrie County126
- Union County124
- Wapello County124
- Jasper County123
- Henry County123
- Jackson County123
- Taylor County122
- Scott County122
- Clinton County122
59 more counties
- Dallas County121
- Decatur County121
- Monroe County121
- Clarke County120
- Kossuth County119
- Jefferson County119
- Carroll County117
- Greene County117
- Ringgold County117
- Plymouth County115
- Cedar County115
- Delaware County115
- Boone County114
- Jones County114
- Humboldt County112
- Crawford County112
- Davis County112
- Benton County112
- Marshall County111
- Worth County111
- Muscatine County110
- Lyon County108
- Webster County108
- Poweshiek County108
- Cherokee County107
- Buchanan County107
- Buena Vista County106
- Sioux County105
- Palo Alto County105
- Story County105
- Dubuque County105
- Ida County102
- Tama County101
- Howard County101
- Dickinson County100
- O'Brien County100
- Osceola County100
- Hancock County100
- Sac County100
- Black Hawk County98
- Winnebago County98
- Winneshiek County98
- Emmet County97
- Calhoun County97
- Allamakee County96
- Cerro Gordo County95
- Clayton County95
- Pocahontas County93
- Mitchell County93
- Fayette County93
- Grundy County89
- Hamilton County88
- Hardin County88
- Wright County88
- Floyd County88
- Butler County84
- Chickasaw County84
- Bremer County82
- Franklin County78
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.