Alert archive / Iowa / Mesoscale Discussions / 2011

Mesoscale Discussions in Iowa, May 2011

27 mesoscale discussions in May 2011. 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 May 2011. Tap one for its archive.

Mesoscale Discussions
27
Busiest day
May 11, 20116 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
May 10, 5:10 PM CDTMesoscale DiscussionSPCAllamakee, Howard, Mitchell, Winneshiek, Worth95 min
May 10, 8:45 PM CDTMesoscale DiscussionSPCAllamakee, Howard, Mitchell, Winneshiek, Worth90 min
May 11, 8:09 AM CDTMesoscale DiscussionSPCAllamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 32 more66 min
May 11, 2:31 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Carroll, Cass, Crawford and 13 more59 min
May 11, 3:38 PM CDTMesoscale DiscussionSPCAllamakee, Appanoose, Benton, Black Hawk, Buchanan, Cedar and 26 more2 hr
May 11, 5:03 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more57 min
May 11, 6:17 PM CDTMesoscale DiscussionSPCAppanoose, Clarke, Davis, Decatur, Jasper, Lucas and 9 more28 min
May 11, 8:16 PM CDTMesoscale DiscussionSPCAdams, Fremont, Mills, Montgomery, Page, Taylor59 min
May 12, 5:35 PM CDTMesoscale DiscussionSPCCalhoun, Carroll, Crawford, Harrison, Ida, Monona and 4 more85 min
May 12, 9:16 PM CDTMesoscale DiscussionSPCFremont, Harrison, Mills, Page, Pottawattamie59 min
May 12, 10:27 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Black Hawk, Boone, Bremer and 31 more63 min
May 21, 12:51 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 31 more114 min
May 21, 5:25 PM CDTMesoscale DiscussionSPCAdams, Appanoose, Clarke, Davis, Decatur, Fremont and 9 more65 min
May 21, 6:07 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 42 more53 min
May 21, 8:55 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 68 more65 min
May 22, 4:41 AM CDTMesoscale DiscussionSPCAllamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 28 more2 hr
May 22, 10:53 AM CDTMesoscale DiscussionSPCAllamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 39 more2 hr
May 22, 2:59 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Chickasaw and 10 more2 hr
May 22, 5:47 PM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Dubuque, Jackson, Johnson and 4 more88 min
May 24, 1:11 PM CDTMesoscale DiscussionSPCBuchanan, Cedar, Clinton, Jackson, Johnson, Jones and 3 more94 min
May 25, 12:48 AM CDTMesoscale DiscussionSPCLee57 min
May 29, 1:41 AM CDTMesoscale DiscussionSPCAppanoose, Davis, Decatur, Jefferson, Monroe, Page and 5 more2 hr
May 29, 8:39 AM CDTMesoscale DiscussionSPCAppanoose, Benton, Buchanan, Cedar, Clarke, Clinton and 28 more66 min
May 29, 4:36 PM CDTMesoscale DiscussionSPCFremont, Mills, Page24 min
May 29, 9:24 PM CDTMesoscale DiscussionSPCAudubon, Crawford, Harrison, Ida, Mills, Monona and 5 more96 min
May 30, 10:09 PM CDTMesoscale DiscussionSPCClay, Dickinson, Lyon, O'Brien, Osceola, Sioux2 hr
May 30, 10:38 PM CDTMesoscale DiscussionSPCCherokee, Harrison, Ida, Monona, Plymouth, Woodbury2 hr

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