Alert archive / Iowa / Mesoscale Discussions

Mesoscale Discussions in Iowa, 2021

133 mesoscale discussions in 2021. 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 2021. Tap one for its archive.

Mesoscale Discussions
133
Busiest month
August38 mesoscale discussions
Busiest day
June 20, 20217 mesoscale discussions

Over time

By month

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
Jan 1, 6:35 AM CSTMesoscale DiscussionSPCDes Moines, Lee4 hr
Jan 14, 8:44 PM CSTMesoscale DiscussionSPCCherokee, Ida, Lyon, Monona, O'Brien, Osceola and 3 more5 hr
Jan 15, 3:37 AM CSTMesoscale DiscussionSPCFremont, Harrison, Mills, Monona, Montgomery, Page and 2 more3 hr
Jan 25, 10:41 AM CSTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Carroll, Cass and 26 more6 hr
Jan 25, 3:26 PM CSTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Benton, Black Hawk and 55 more4 hr
Feb 21, 8:52 AM CSTMesoscale DiscussionSPCAdair, Audubon, Benton, Black Hawk, Boone, Buchanan and 26 more4 hr
Mar 10, 1:32 PM CSTMesoscale DiscussionSPCAdair, Audubon, Benton, Black Hawk, Boone, Bremer and 38 more118 min
Mar 10, 5:43 PM CSTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 21 more2 hr
Mar 14, 6:20 PM CDTMesoscale DiscussionSPCAdair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 32 more6 hr
Mar 15, 1:50 AM CDTMesoscale DiscussionSPCBlack Hawk, Boone, Bremer, Buchanan, Buena Vista, Butler and 38 more6 hr
Mar 23, 12:44 PM CDTMesoscale DiscussionSPCAppanoose, Davis, Decatur, Lee, Ringgold, Taylor and 3 more2 hr
Apr 5, 6:21 PM CDTMesoscale DiscussionSPCLyon, Sioux114 min
Apr 7, 5:04 PM CDTMesoscale DiscussionSPCDavis, Des Moines, Henry, Jefferson, Lee, Louisa and 1 more116 min
Apr 27, 8:24 PM CDTMesoscale DiscussionSPCAllamakee, Cerro Gordo, Hancock, Howard, Mitchell, Winnebago and 2 more2 hr
May 2, 4:20 PM CDTMesoscale DiscussionSPCAllamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clay and 18 more115 min
May 3, 2:08 PM CDTMesoscale DiscussionSPCDes Moines, Henry, Lee, Louisa, Van Buren67 min
May 14, 4:58 PM CDTMesoscale DiscussionSPCLyon92 min
May 15, 1:16 PM CDTMesoscale DiscussionSPCAdair, Audubon, Black Hawk, Boone, Bremer, Buena Vista and 37 more119 min
May 20, 9:05 PM CDTMesoscale DiscussionSPCAdair, Allamakee, Black Hawk, Boone, Bremer, Buchanan and 27 more115 min
May 25, 7:40 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Cass, Dallas and 7 more95 min
Jun 11, 7:28 AM CDTMesoscale DiscussionSPCHarrison, Mills, Monona, Pottawattamie92 min
Jun 11, 9:35 AM CDTMesoscale DiscussionSPCBoone, Bremer, Butler, Calhoun, Cerro Gordo, Chickasaw and 19 more115 min
Jun 16, 6:26 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 16 more2 hr
Jun 16, 9:34 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Buena Vista, Calhoun, Carroll and 13 more116 min
Jun 16, 11:49 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Clarke, Dallas and 9 more86 min
Jun 17, 2:57 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 17 more63 min
Jun 17, 7:02 PM CDTMesoscale DiscussionSPCAllamakee, Howard, Mitchell, Winnebago, Winneshiek, Worth88 min
Jun 17, 9:01 PM CDTMesoscale DiscussionSPCAllamakee, Howard, Mitchell, Winneshiek89 min
Jun 17, 10:52 PM CDTMesoscale DiscussionSPCAllamakee, Howard, Winneshiek83 min
Jun 18, 1:34 AM CDTMesoscale DiscussionSPCAllamakee116 min
Jun 18, 9:27 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Cass, Clarke, Davis and 31 more2 hr
Jun 19, 2:10 AM CDTMesoscale DiscussionSPCDavis, Des Moines, Henry, Jefferson, Lee, Van Buren and 1 more2 hr
Jun 19, 11:09 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Fremont, Guthrie and 10 more96 min
Jun 20, 3:37 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Cass, Clarke and 12 more113 min
Jun 20, 10:57 AM CDTMesoscale DiscussionSPCDes Moines, Henry, Lee, Louisa, Scott2 hr
Jun 20, 1:10 PM CDTMesoscale DiscussionSPCBoone, Butler, Calhoun, Cerro Gordo, Emmet, Floyd and 17 more95 min
Jun 20, 2:02 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Boone, Cass, Clarke and 22 more118 min
Jun 20, 5:22 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Butler, Chickasaw and 9 more113 min
Jun 20, 6:56 PM CDTMesoscale DiscussionSPCAppanoose, Clarke, Davis, Decatur, Des Moines, Henry and 15 more2 hr
Jun 22, 3:41 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 34 more2 hr
Jun 22, 6:51 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Calhoun and 36 more54 min
Jun 23, 8:10 PM CDTMesoscale DiscussionSPCMonona, Plymouth, Woodbury95 min
Jun 23, 10:12 PM CDTMesoscale DiscussionSPCHarrison, Mills, Monona, Pottawattamie93 min
Jun 24, 1:36 AM CDTMesoscale DiscussionSPCAdams, Cass, Fremont, Harrison, Mills, Montgomery and 4 more114 min
Jun 24, 5:02 AM CDTMesoscale DiscussionSPCAppanoose, Clarke, Davis, Decatur, Lucas, Madison and 8 more118 min
Jun 24, 5:30 PM CDTMesoscale DiscussionSPCFremont, Page60 min
Jun 24, 6:19 PM CDTMesoscale DiscussionSPCAppanoose, Clarke, Davis, Decatur, Lucas, Monroe and 3 more56 min
Jun 24, 7:29 PM CDTMesoscale DiscussionSPCFremont, Page, Ringgold, Taylor61 min
Jun 24, 11:23 PM CDTMesoscale DiscussionSPCLee2 hr
Jun 25, 1:00 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Boone, Buchanan, Buena Vista, Butler and 29 more2 hr
Jul 5, 5:44 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Hancock, Humboldt, Kossuth and 9 more2 hr
Jul 6, 1:06 PM CDTMesoscale DiscussionSPCLyon, Osceola, Sioux114 min
Jul 6, 5:22 PM CDTMesoscale DiscussionSPCAllamakee, Cerro Gordo, Chickasaw, Clay, Dickinson, Emmet and 14 more113 min
Jul 6, 8:00 PM CDTMesoscale DiscussionSPCHoward, Mitchell, Winnebago, Winneshiek, Worth2 hr
Jul 7, 2:02 PM CDTMesoscale DiscussionSPCDes Moines, Henry, Lee, Louisa88 min
Jul 9, 2:41 AM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Crawford, Ida, Lyon and 6 more34 min
Jul 9, 1:28 PM CDTMesoscale DiscussionSPCBoone, Dallas, Lucas, Polk, Warren2 hr
Jul 9, 5:40 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Bremer, Buchanan, Butler, Cedar and 15 more95 min
Jul 9, 9:12 PM CDTMesoscale DiscussionSPCAdair, Adams, Cass, Fremont, Harrison, Mills and 7 more2 hr
Jul 10, 1:20 PM CDTMesoscale DiscussionSPCFremont, Mills, Montgomery, Page115 min
Jul 10, 3:44 PM CDTMesoscale DiscussionSPCFremont, Page91 min
Jul 14, 7:02 AM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 43 more2 hr
Jul 14, 11:45 AM CDTMesoscale DiscussionSPCAllamakee, Clayton, Dubuque, Jackson, Jones2 hr
Jul 14, 1:40 PM CDTMesoscale DiscussionSPCAudubon, Black Hawk, Boone, Bremer, Buena Vista, Butler and 38 more2 hr
Jul 14, 4:17 PM CDTMesoscale DiscussionSPCBoone, Butler, Calhoun, Franklin, Greene, Grundy and 5 more58 min
Jul 14, 5:42 PM CDTMesoscale DiscussionSPCAllamakee, Clayton, Delaware, Dubuque, Jackson, Jones63 min
Jul 14, 5:47 PM CDTMesoscale DiscussionSPCAudubon, Benton, Black Hawk, Boone, Bremer, Buchanan and 29 more118 min
Jul 14, 8:35 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Buchanan, Fayette, Grundy, Jasper and 5 more25 min
Jul 14, 9:15 PM CDTMesoscale DiscussionSPCAllamakee, Clayton, Clinton, Delaware, Dubuque, Jackson and 2 more90 min
Jul 14, 11:17 PM CDTMesoscale DiscussionSPCClinton, Muscatine, Scott58 min
Jul 24, 3:00 PM CDTMesoscale DiscussionSPCClinton, Des Moines, Louisa, Muscatine, Scott2 hr
Jul 27, 7:33 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 11 more87 min
Jul 27, 10:35 PM CDTMesoscale DiscussionSPCAllamakee, Bremer, Buchanan, Chickasaw, Clayton, Delaware and 5 more55 min
Jul 28, 12:50 AM CDTMesoscale DiscussionSPCBenton, Buchanan, Clayton, Delaware, Dubuque, Jackson and 2 more55 min
Jul 28, 11:24 PM CDTMesoscale DiscussionSPCAllamakee96 min
Jul 29, 2:19 PM CDTMesoscale DiscussionSPCDavis, Lee, Van Buren116 min
Jul 30, 8:16 PM CDTMesoscale DiscussionSPCAdams, Cass, Fremont, Mills, Montgomery, Page and 2 more59 min
Jul 31, 1:06 PM CDTMesoscale DiscussionSPCAllamakee, Bremer, Chickasaw, Clayton, Fayette, Howard and 2 more2 hr
Aug 5, 9:34 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 7 more86 min
Aug 6, 11:54 PM CDTMesoscale DiscussionSPCLyon, Sioux2 hr
Aug 7, 2:10 AM CDTMesoscale DiscussionSPCLyon, Osceola2 hr
Aug 7, 11:03 AM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 11 more2 hr
Aug 7, 3:46 PM CDTMesoscale DiscussionSPCAllamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 7 more119 min
Aug 7, 9:35 PM CDTMesoscale DiscussionSPCAdair, Adams, Cass, Clarke, Decatur, Fremont and 7 more85 min
Aug 7, 11:19 PM CDTMesoscale DiscussionSPCAdair, Adams, Cass, Clarke, Madison, Montgomery and 4 more86 min
Aug 8, 5:04 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 11 more86 min
Aug 8, 11:58 PM CDTMesoscale DiscussionSPCBoone, Hamilton, Polk, Story2 hr
Aug 10, 1:12 PM CDTMesoscale DiscussionSPCAppanoose, Benton, Black Hawk, Bremer, Buchanan, Butler and 35 more93 min
Aug 10, 5:51 PM CDTMesoscale DiscussionSPCCedar, Clinton, Jackson, Jones, Muscatine, Scott84 min
Aug 11, 6:26 AM CDTMesoscale DiscussionSPCDes Moines, Lee2 hr
Aug 11, 11:48 AM CDTMesoscale DiscussionSPCAllamakee117 min
Aug 11, 3:56 PM CDTMesoscale DiscussionSPCAppanoose, Benton, Buchanan, Cedar, Clinton, Davis and 21 more3 hr
Aug 11, 5:40 PM CDTMesoscale DiscussionSPCBenton, Cedar, Clinton, Delaware, Dubuque, Iowa and 5 more95 min
Aug 11, 7:35 PM CDTMesoscale DiscussionSPCClinton, Jackson, Scott85 min
Aug 20, 1:51 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Crawford, Fremont, Harrison, Ida and 9 more84 min
Aug 20, 7:06 PM CDTMesoscale DiscussionSPCFremont, Mills, Montgomery, Page84 min
Aug 24, 6:00 AM CDTMesoscale DiscussionSPCAllamakee, Cerro Gordo, Chickasaw, Clayton, Dubuque, Fayette and 6 more90 min
Aug 24, 12:44 PM CDTMesoscale DiscussionSPCAllamakee, Bremer, Butler, Chickasaw, Clayton, Fayette and 4 more91 min
Aug 24, 5:10 PM CDTMesoscale DiscussionSPCBenton, Cedar, Clinton, Iowa, Jackson, Jasper and 7 more2 hr
Aug 25, 3:02 PM CDTMesoscale DiscussionSPCLyon, Plymouth, Sioux88 min
Aug 26, 7:37 AM CDTMesoscale DiscussionSPCAdair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 20 more83 min
Aug 26, 9:40 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Benton, Boone, Clarke and 25 more95 min
Aug 26, 1:12 PM CDTMesoscale DiscussionSPCAllamakee, Winneshiek93 min
Aug 26, 5:34 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Crawford, Harrison, Ida and 9 more116 min
Aug 26, 10:45 PM CDTMesoscale DiscussionSPCBremer, Buena Vista, Butler, Calhoun, Cerro Gordo, Cherokee and 25 more2 hr
Aug 27, 1:53 PM CDTMesoscale DiscussionSPCBlack Hawk, Bremer, Butler, Calhoun, Cerro Gordo, Chickasaw and 18 more97 min
Aug 27, 4:01 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Butler, Calhoun, Cerro Gordo and 20 more59 min
Aug 27, 5:30 PM CDTMesoscale DiscussionSPCAllamakee, Cerro Gordo, Chickasaw, Floyd, Howard, Winneshiek60 min
Aug 27, 6:28 PM CDTMesoscale DiscussionSPCAudubon, Calhoun, Carroll, Crawford, Greene, Guthrie and 6 more92 min
Aug 27, 7:59 PM CDTMesoscale DiscussionSPCAllamakee, Clayton, Fayette2 hr
Aug 27, 9:57 PM CDTMesoscale DiscussionSPCAllamakee, Bremer, Chickasaw, Clayton, Fayette, Floyd and 3 more93 min
Aug 28, 2:43 PM CDTMesoscale DiscussionSPCLyon, Osceola, Plymouth, Sioux3 hr
Aug 28, 5:27 PM CDTMesoscale DiscussionSPCEmmet63 min
Aug 28, 9:57 PM CDTMesoscale DiscussionSPCAudubon, Buena Vista, Calhoun, Carroll, Cerro Gordo, Crawford and 19 more63 min
Aug 30, 11:35 PM CDTMesoscale DiscussionSPCHarrison85 min
Aug 31, 3:02 AM CDTMesoscale DiscussionSPCAdams, Cass, Fremont, Harrison, Mills, Montgomery and 5 more118 min
Sep 13, 9:23 PM CDTMesoscale DiscussionSPCAudubon, Boone, Buena Vista, Butler, Calhoun, Carroll and 25 more97 min
Sep 16, 6:23 PM CDTMesoscale DiscussionSPCDickinson, Lyon, O'Brien, Osceola, Sioux97 min
Sep 17, 12:53 AM CDTMesoscale DiscussionSPCClay, Dickinson, Emmet, O'Brien, Osceola, Sioux67 min
Sep 20, 12:38 PM CDTMesoscale DiscussionSPCAdair, Adams, Allamakee, Appanoose, Benton, Black Hawk and 49 more2 hr
Sep 20, 3:55 PM CDTMesoscale DiscussionSPCAllamakee, Appanoose, Benton, Black Hawk, Boone, Bremer and 49 more95 min
Sep 20, 5:52 PM CDTMesoscale DiscussionSPCAllamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 30 more113 min
Oct 20, 7:39 AM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 11 more96 min
Oct 23, 9:14 PM CDTMesoscale DiscussionSPCAppanoose, Davis, Decatur, Fremont, Lee, Page and 4 more3 hr
Nov 10, 3:46 PM CSTMesoscale DiscussionSPCBoone, Clarke, Dallas, Decatur, Jasper, Lucas and 8 more119 min
Dec 10, 12:27 PM CSTMesoscale DiscussionSPCClay, Dickinson, Emmet, Lyon, O'Brien, Osceola and 1 more4 hr
Dec 10, 3:31 PM CSTMesoscale DiscussionSPCClay, Dickinson, Emmet, Kossuth, Lyon, Osceola and 2 more4 hr
Dec 15, 12:28 PM CSTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Buena Vista and 59 more2 hr
Dec 15, 3:55 PM CSTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 40 more95 min
Dec 15, 4:51 PM CSTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Cedar and 24 more114 min
Dec 15, 5:16 PM CSTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 30 more119 min
Dec 15, 7:11 PM CSTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Chickasaw and 13 more2 hr
Dec 28, 8:59 AM CSTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 34 more5 hr

By county

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

59 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. June 20, 20217mesoscale discussions
  2. June 24, 20216mesoscale discussions
  3. July 14, 20216mesoscale discussions
  4. August 27, 20215mesoscale discussions
  5. June 18, 20214mesoscale discussions
  6. August 7, 20214mesoscale discussions
  7. August 11, 20214mesoscale discussions
  8. August 26, 20214mesoscale discussions
  9. August 28, 20214mesoscale discussions
  10. December 15, 20214mesoscale discussions
  11. June 17, 20213mesoscale discussions
  12. June 25, 20213mesoscale discussions

Nearby

Alerts in force nowTornadoes on recordThe radar archive20202022

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.