Alert archive / Iowa / Mesoscale Discussions / 2009

Mesoscale Discussions in Iowa, August 2009

25 mesoscale discussions in August 2009. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of mesoscale discussions reaches back to 2003.

Mesoscale Discussions by county

Each county as a circle sized by its count in August 2009. Tap one for its archive.

Mesoscale Discussions
25
Busiest day
August 9, 20097 mesoscale discussions

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.

IssuedProductOfficeCountiesLasted
Jul 31, 7:43 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more2 hr
Aug 2, 8:32 PM CDTMesoscale DiscussionSPCClay, Dickinson, Emmet, Kossuth, Lyon, O'Brien and 4 more28 min
Aug 2, 11:21 PM CDTMesoscale DiscussionSPCAllamakee, Buena Vista, Cerro Gordo, Cherokee, Chickasaw, Clay and 16 more84 min
Aug 3, 6:58 PM CDTMesoscale DiscussionSPCPlymouth, Sioux2 hr
Aug 4, 7:11 AM CDTMesoscale DiscussionSPCDavis, Des Moines, Henry, Jefferson, Lee, Louisa and 2 more94 min
Aug 7, 3:55 PM CDTMesoscale DiscussionSPCCherokee, Crawford, Harrison, Ida, Monona, Plymouth and 4 more95 min
Aug 7, 8:58 PM CDTMesoscale DiscussionSPCBlack Hawk, Boone, Bremer, Buchanan, Buena Vista, Butler and 35 more92 min
Aug 8, 1:29 AM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 37 more2 hr
Aug 8, 12:16 PM CDTMesoscale DiscussionSPCDickinson, Emmet, Lyon, Osceola29 min
Aug 8, 3:27 PM CDTMesoscale DiscussionSPCDickinson, Lyon, Osceola33 min
Aug 9, 5:01 AM CDTMesoscale DiscussionSPCHarrison, Monona, Pottawattamie59 min
Aug 9, 6:30 AM CDTMesoscale DiscussionSPCAudubon, Black Hawk, Boone, Bremer, Butler, Calhoun and 30 more2 hr
Aug 9, 9:55 AM CDTMesoscale DiscussionSPCAdair, Adams, Allamakee, Audubon, Benton, Black Hawk and 68 more35 min
Aug 9, 11:16 AM CDTMesoscale DiscussionSPCHarrison, Pottawattamie, Shelby29 min
Aug 9, 1:18 PM CDTMesoscale DiscussionSPCFremont, Mills, Montgomery, Page, Taylor27 min
Aug 9, 1:40 PM CDTMesoscale DiscussionSPCAdair, Audubon, Black Hawk, Boone, Bremer, Butler and 23 more35 min
Aug 9, 5:49 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Clarke, Davis, Decatur and 18 more86 min
Aug 9, 8:30 PM CDTMesoscale DiscussionSPCAppanoose, Cedar, Clinton, Davis, Des Moines, Henry and 8 more90 min
Aug 12, 4:03 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 44 more87 min
Aug 17, 1:22 AM CDTMesoscale DiscussionSPCDavis, Des Moines, Henry, Jefferson, Lee, Louisa and 3 more83 min
Aug 19, 11:51 AM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Henry, Lee, Louisa and 2 more114 min
Aug 19, 4:34 PM CDTMesoscale DiscussionSPCAllamakee, Clayton, Delaware, Dubuque, Jackson, Jones and 1 more56 min
Aug 19, 5:19 PM CDTMesoscale DiscussionSPCAdams, Buena Vista, Cass, Cherokee, Crawford, Fremont and 14 more26 min
Aug 19, 7:45 PM CDTMesoscale DiscussionSPCAllamakee, Buchanan, Cedar, Clayton, Clinton, Delaware and 10 more90 min
Aug 20, 1:51 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 20 more114 min

By county

Every county with at least one alert. A county page lists each alert that covered it.

59 more counties

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. Warning verification from the Mesonet's Cow. Rebuilt daily.