Weather alerts in Iowa, 2009
1,551 weather alerts in 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 2009. Tap one for its archive.
- Alerts
- 1,551
- Warnings
- 870
- Watches
- 146
- Advisories
- 275
- Busiest month
- June375 alerts
- Busiest day
- June 18, 200978 alerts
Over time
By month
The alerts
1,551 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.
- Johnson County174
- Linn County158
- Louisa County158
- Jones County153
- Clinton County152
- Polk County152
- Cedar County150
- Madison County148
- Des Moines County147
- Benton County146
- Washington County146
- Iowa County145
- Delaware County144
- Jackson County144
- Lee County144
- Muscatine County144
- Scott County144
- Marion County144
- Marshall County140
- Dubuque County139
- Fremont County139
- Page County139
- Warren County139
- Buchanan County138
- Adair County138
- Henry County138
- Dallas County137
- Montgomery County135
- Black Hawk County134
- Guthrie County134
- Story County133
- Plymouth County132
- Pottawattamie County131
- Keokuk County131
- Tama County130
- Mills County130
- Boone County129
- Jefferson County129
- Cass County128
- Adams County127
59 more counties
- Greene County127
- Sioux County126
- Webster County126
- Taylor County125
- Union County125
- Mahaska County125
- Lucas County125
- Wayne County125
- Woodbury County124
- Grundy County124
- Hamilton County123
- Decatur County123
- Clay County122
- Hardin County122
- Butler County121
- Jasper County121
- Audubon County120
- Calhoun County120
- Carroll County120
- Sac County119
- Clarke County119
- Dickinson County118
- Wapello County117
- Ringgold County116
- Franklin County114
- Wright County114
- Van Buren County114
- Fayette County113
- Bremer County113
- Cerro Gordo County112
- Lyon County111
- O'Brien County111
- Poweshiek County111
- Appanoose County111
- Crawford County110
- Humboldt County110
- Clayton County109
- Kossuth County109
- Pocahontas County109
- Harrison County109
- Buena Vista County108
- Osceola County108
- Hancock County107
- Shelby County107
- Cherokee County106
- Palo Alto County105
- Davis County105
- Monroe County105
- Monona County103
- Ida County102
- Chickasaw County102
- Emmet County98
- Allamakee County96
- Winnebago County96
- Floyd County94
- Winneshiek County94
- Worth County93
- Howard County91
- Mitchell County85
The busiest days
Days with the most alerts issued, by UTC date.
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.