Alert archive / Iowa / Mesoscale Discussions

Mesoscale Discussions in Iowa, 2020

134 mesoscale discussions in 2020. 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 2020. Tap one for its archive.

Mesoscale Discussions
134
Busiest month
June32 mesoscale discussions
Busiest day
August 10, 20209 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 3, 1:24 PM CSTMesoscale DiscussionSPCButler, Cerro Gordo, Emmet, Floyd, Franklin, Hamilton and 11 more5 hr
Jan 10, 12:54 PM CSTMesoscale DiscussionSPCAppanoose, Clarke, Decatur, Keokuk, Lucas, Mahaska and 9 more6 hr
Jan 10, 5:50 PM CSTMesoscale DiscussionSPCBenton, Black Hawk, Buchanan, Cedar, Clayton, Clinton and 20 more6 hr
Jan 17, 6:32 AM CSTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 48 more5 hr
Jan 17, 4:07 PM CSTMesoscale DiscussionSPCLee5 hr
Feb 9, 1:16 AM CSTMesoscale DiscussionSPCEmmet, Winnebago, Worth5 hr
Feb 17, 3:27 PM CSTMesoscale DiscussionSPCAllamakee, Chickasaw, Clayton, Howard, Mitchell, Winneshiek4 hr
Mar 19, 2:41 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Cass, Clarke, Davis and 19 more3 hr
Mar 19, 5:43 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Cass, Clarke, Dallas and 20 more2 hr
Mar 19, 8:40 PM CDTMesoscale DiscussionSPCAdams, Appanoose, Clarke, Davis, Decatur, Henry and 18 more95 min
Mar 28, 1:34 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Cedar, Clarke, Clinton and 32 more56 min
Mar 28, 1:33 PM CDTMesoscale DiscussionSPCAppanoose, Clarke, Davis, Decatur, Des Moines, Henry and 19 more117 min
Mar 28, 5:21 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Buchanan, Cedar, Clinton, Delaware and 16 more84 min
Mar 28, 6:42 PM CDTMesoscale DiscussionSPCBuchanan, Clayton, Delaware, Dubuque, Jackson, Jones and 1 more93 min
Apr 7, 5:07 PM CDTMesoscale DiscussionSPCCedar, Clinton, Dubuque, Jackson, Scott83 min
Apr 7, 7:22 PM CDTMesoscale DiscussionSPCCedar, Clinton, Jackson, Johnson, Muscatine, Scott83 min
Apr 8, 1:46 PM CDTMesoscale DiscussionSPCDes Moines, Henry, Jefferson, Lee, Louisa, Van Buren119 min
Apr 12, 6:26 AM CDTMesoscale DiscussionSPCLyon, Osceola4 hr
Apr 16, 1:29 PM CDTMesoscale DiscussionSPCAdams, Cass, Fremont, Mills, Montgomery, Page and 3 more4 hr
Apr 16, 5:43 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Cass, Clarke, Davis and 25 more4 hr
Apr 28, 3:33 PM CDTMesoscale DiscussionSPCDes Moines, Lee87 min
May 13, 11:48 PM CDTMesoscale DiscussionSPCAdams, Decatur, Fremont, Mills, Montgomery, Page and 2 more2 hr
May 14, 3:55 PM CDTMesoscale DiscussionSPCAppanoose, Clarke, Davis, Decatur, Jefferson, Lucas and 6 more95 min
May 14, 5:19 PM CDTMesoscale DiscussionSPCDes Moines, Henry, Jefferson, Lee, Louisa, Muscatine and 3 more116 min
May 14, 6:01 PM CDTMesoscale DiscussionSPCAppanoose, Clarke, Decatur, Lucas, Ringgold, Wayne119 min
May 14, 8:22 PM CDTMesoscale DiscussionSPCAppanoose, Davis, Wayne113 min
May 14, 9:38 PM CDTMesoscale DiscussionSPCDes Moines, Louisa, Muscatine52 min
May 16, 6:45 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 36 more90 min
May 23, 11:29 AM CDTMesoscale DiscussionSPCBenton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 14 more2 hr
May 23, 2:51 PM CDTMesoscale DiscussionSPCBenton, Buchanan, Cedar, Clayton, Clinton, Delaware and 7 more84 min
May 24, 4:13 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Black Hawk, Boone and 56 more62 min
May 24, 1:13 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Cass and 21 more92 min
May 24, 3:25 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Carroll, Cass and 19 more95 min
May 26, 12:29 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Boone, Clarke, Dallas and 24 more2 hr
May 26, 3:53 PM CDTMesoscale DiscussionSPCAdair, Boone, Butler, Calhoun, Cerro Gordo, Dallas and 24 more67 min
May 26, 6:02 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 10 more88 min
Jun 2, 3:52 PM CDTMesoscale DiscussionSPCClay, Dickinson, Emmet, Howard, Kossuth, Lyon and 8 more113 min
Jun 2, 5:32 PM CDTMesoscale DiscussionSPCAllamakee, Cerro Gordo, Chickasaw, Clayton, Dickinson, Emmet and 7 more118 min
Jun 3, 4:56 AM CDTMesoscale DiscussionSPCAdair, Adams, Benton, Cedar, Clarke, Clinton and 22 more3 hr
Jun 3, 9:52 AM CDTMesoscale DiscussionSPCDes Moines, Henry, Lee, Van Buren113 min
Jun 3, 6:37 PM CDTMesoscale DiscussionSPCAppanoose, Davis, Des Moines, Henry, Jefferson, Keokuk and 10 more113 min
Jun 3, 8:54 PM CDTMesoscale DiscussionSPCFremont2 hr
Jun 3, 10:44 PM CDTMesoscale DiscussionSPCFremont2 hr
Jun 4, 12:59 PM CDTMesoscale DiscussionSPCAudubon, Benton, Black Hawk, Boone, Buchanan, Buena Vista and 29 more61 min
Jun 4, 5:14 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 61 more91 min
Jun 4, 10:50 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 20 more115 min
Jun 5, 1:59 AM CDTMesoscale DiscussionSPCAdams, Fremont, Mills, Montgomery, Page, Ringgold and 1 more91 min
Jun 5, 4:17 AM CDTMesoscale DiscussionSPCAppanoose, Benton, Black Hawk, Boone, Bremer, Buchanan and 34 more88 min
Jun 5, 7:59 AM CDTMesoscale DiscussionSPCDes Moines, Henry, Lee91 min
Jun 5, 12:26 PM CDTMesoscale DiscussionSPCClinton, Jackson94 min
Jun 9, 6:43 PM CDTMesoscale DiscussionSPCFremont, Mills, Page, Taylor92 min
Jun 9, 9:21 PM CDTMesoscale DiscussionSPCAdair, Adams, Cass, Clarke, Decatur, Fremont and 8 more84 min
Jun 18, 3:39 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 13 more96 min
Jun 18, 3:48 PM CDTMesoscale DiscussionSPCAdair, Audubon, Carroll, Cass, Crawford, Fremont and 8 more117 min
Jun 18, 6:30 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Clarke, Dallas and 19 more2 hr
Jun 21, 2:19 PM CDTMesoscale DiscussionSPCMonona, Plymouth, Woodbury116 min
Jun 21, 2:44 PM CDTMesoscale DiscussionSPCCerro Gordo, Clay, Dickinson, Emmet, Hancock, Kossuth and 7 more2 hr
Jun 21, 6:14 PM CDTMesoscale DiscussionSPCCerro Gordo, Emmet, Hancock, Humboldt, Kossuth, Mitchell and 3 more2 hr
Jun 21, 6:59 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Crawford, Dickinson, Harrison and 10 more2 hr
Jun 21, 9:09 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 13 more2 hr
Jun 26, 12:38 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 17 more2 hr
Jun 26, 3:39 PM CDTMesoscale DiscussionSPCCedar, Clayton, Clinton, Delaware, Dubuque, Jackson and 2 more2 hr
Jun 26, 5:40 PM CDTMesoscale DiscussionSPCAppanoose, Davis, Des Moines, Henry, Jefferson, Keokuk and 6 more65 min
Jun 26, 6:30 PM CDTMesoscale DiscussionSPCAdams, Fremont, Mills, Montgomery, Page, Taylor and 1 more90 min
Jun 26, 10:41 PM CDTMesoscale DiscussionSPCAppanoose, Decatur, Fremont, Monroe, Page, Ringgold and 2 more2 hr
Jun 28, 3:42 PM CDTMesoscale DiscussionSPCCerro Gordo, Hancock, Mitchell, Winnebago, Worth2 hr
Jun 28, 7:20 PM CDTMesoscale DiscussionSPCHoward, Mitchell, Worth115 min
Jun 28, 8:19 PM CDTMesoscale DiscussionSPCAudubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 20 more116 min
Jun 30, 10:46 PM CDTMesoscale DiscussionSPCFremont, Harrison, Mills, Monona, Pottawattamie, Woodbury89 min
Jul 1, 1:48 AM CDTMesoscale DiscussionSPCCass, Fremont, Mills, Montgomery, Page, Pottawattamie and 2 more87 min
Jul 3, 1:16 AM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Crawford, Harrison, Ida and 8 more2 hr
Jul 6, 1:57 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Emmet, Lyon and 4 more2 hr
Jul 7, 3:24 AM CDTMesoscale DiscussionSPCMonona, Plymouth, Woodbury2 hr
Jul 7, 1:23 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 10 more2 hr
Jul 8, 8:39 PM CDTMesoscale DiscussionSPCHarrison, Monona, Plymouth, Woodbury96 min
Jul 9, 10:24 AM CDTMesoscale DiscussionSPCAllamakee, Appanoose, Benton, Black Hawk, Boone, Bremer and 49 more3 hr
Jul 9, 2:51 PM CDTMesoscale DiscussionSPCCedar, Clinton, Davis, Des Moines, Dubuque, Henry and 16 more114 min
Jul 9, 5:39 PM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Dubuque, Jackson, Johnson and 4 more96 min
Jul 11, 1:23 AM CDTMesoscale DiscussionSPCFremont, Harrison, Mills, Montgomery, Page, Pottawattamie2 hr
Jul 11, 9:36 AM CDTMesoscale DiscussionSPCBenton, Black Hawk, Bremer, Buchanan, Butler, Cedar and 11 more114 min
Jul 11, 11:36 AM CDTMesoscale DiscussionSPCBenton, Black Hawk, Buena Vista, Clay, Dickinson, Emmet and 14 more114 min
Jul 11, 2:52 PM CDTMesoscale DiscussionSPCBlack Hawk, Bremer, Butler, Cerro Gordo, Chickasaw, Fayette and 16 more83 min
Jul 11, 7:17 PM CDTMesoscale DiscussionSPCBenton, Buchanan, Cedar, Clinton, Des Moines, Henry and 12 more58 min
Jul 13, 7:34 PM CDTMesoscale DiscussionSPCDickinson, Lyon, O'Brien, Osceola, Plymouth, Sioux116 min
Jul 14, 7:58 AM CDTMesoscale DiscussionSPCHoward, Mitchell, Winnebago, Worth92 min
Jul 14, 3:14 PM CDTMesoscale DiscussionSPCAdair, Adams, Allamakee, Audubon, Black Hawk, Boone and 34 more2 hr
Jul 14, 8:00 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 22 more60 min
Jul 17, 9:55 AM CDTMesoscale DiscussionSPCCherokee, Clay, Dickinson, Lyon, O'Brien, Osceola and 2 more95 min
Jul 26, 2:06 PM CDTMesoscale DiscussionSPCAdams, Cass, Fremont, Mills, Montgomery, Page and 2 more114 min
Jul 26, 5:33 PM CDTMesoscale DiscussionSPCCedar, Clinton, Dubuque, Jackson, Jones, Muscatine and 1 more87 min
Aug 8, 5:00 PM CDTMesoscale DiscussionSPCHoward2 hr
Aug 9, 1:46 AM CDTMesoscale DiscussionSPCLyon, Osceola, Sioux59 min
Aug 9, 1:30 PM CDTMesoscale DiscussionSPCDelaware, Dubuque2 hr
Aug 9, 10:59 PM CDTMesoscale DiscussionSPCAllamakee, Bremer, Buena Vista, Butler, Calhoun, Carroll and 32 more3 hr
Aug 10, 3:19 AM CDTMesoscale DiscussionSPCLyon, O'Brien, Osceola, Plymouth, Sioux, Woodbury116 min
Aug 10, 7:46 AM CDTMesoscale DiscussionSPCIda, Monona, Plymouth, Woodbury89 min
Aug 10, 8:40 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Calhoun and 39 more65 min
Aug 10, 9:45 AM CDTMesoscale DiscussionSPCAdair, Audubon, Boone, Calhoun, Carroll, Cass and 17 more90 min
Aug 10, 10:42 AM CDTMesoscale DiscussionSPCAllamakee, Buchanan, Cedar, Chickasaw, Clayton, Clinton and 18 more93 min
Aug 10, 11:00 AM CDTMesoscale DiscussionSPCBoone, Dallas, Jasper, Mahaska, Marion, Marshall and 5 more60 min
Aug 10, 12:14 PM CDTMesoscale DiscussionSPCBenton, Cedar, Clinton, Iowa, Jackson, Johnson and 10 more91 min
Aug 10, 1:36 PM CDTMesoscale DiscussionSPCClinton, Jackson, Scott114 min
Aug 14, 1:57 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 19 more2 hr
Aug 14, 5:35 PM CDTMesoscale DiscussionSPCCherokee, Dickinson, Lyon, Monona, O'Brien, Osceola and 3 more85 min
Aug 14, 10:21 PM CDTMesoscale DiscussionSPCHoward, Mitchell54 min
Aug 22, 6:57 PM CDTMesoscale DiscussionSPCBoone, Calhoun, Carroll, Dallas, Greene, Guthrie and 10 more93 min
Aug 24, 4:00 PM CDTMesoscale DiscussionSPCAllamakee90 min
Aug 28, 1:28 AM CDTMesoscale DiscussionSPCDickinson, Emmet, Lyon, Osceola, Winnebago92 min
Aug 28, 6:59 AM CDTMesoscale DiscussionSPCAllamakee, Cerro Gordo, Chickasaw, Floyd, Hancock, Howard and 5 more91 min
Aug 28, 2:56 PM CDTMesoscale DiscussionSPCAdair, Adams, Allamakee, Appanoose, Audubon, Benton and 53 more64 min
Aug 28, 5:29 PM CDTMesoscale DiscussionSPCAppanoose, Clinton, Davis, Des Moines, Henry, Jefferson and 8 more91 min
Sep 5, 7:53 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 19 more2 hr
Sep 5, 11:26 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 28 more94 min
Sep 6, 1:06 AM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 28 more84 min
Sep 6, 2:32 AM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 45 more88 min
Sep 6, 5:30 AM CDTMesoscale DiscussionSPCBenton, Black Hawk, Boone, Bremer, Buchanan, Butler and 31 more90 min
Sep 6, 9:32 PM CDTMesoscale DiscussionSPCClinton, Scott118 min
Sep 7, 7:14 PM CDTMesoscale DiscussionSPCAppanoose, Clarke, Davis, Decatur, Des Moines, Henry and 7 more2 hr
Oct 11, 3:52 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 16 more83 min
Oct 11, 6:50 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Crawford, Dickinson, Harrison and 8 more115 min
Oct 11, 9:02 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Crawford, Dickinson, Emmet and 11 more118 min
Oct 11, 11:28 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Calhoun, Carroll, Cass and 6 more92 min
Oct 22, 4:53 PM CDTMesoscale DiscussionSPCAdair, Adams, Allamakee, Benton, Black Hawk, Bremer and 36 more2 hr
Nov 10, 8:52 AM CSTMesoscale DiscussionSPCLee113 min
Nov 10, 9:19 AM CSTMesoscale DiscussionSPCEmmet, Winnebago5 hr
Nov 10, 9:42 AM CSTMesoscale DiscussionSPCLyon, O'Brien, Osceola, Plymouth, Sioux6 hr
Nov 10, 1:48 PM CSTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Henry, Jackson, Jones and 4 more87 min
Nov 10, 3:51 PM CSTMesoscale DiscussionSPCLyon, Osceola6 hr
Dec 12, 1:19 AM CSTMesoscale DiscussionSPCBenton, Black Hawk, Buchanan, Delaware, Dubuque, Grundy and 13 more6 hr
Dec 23, 9:38 AM CSTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Emmet, Lyon and 5 more5 hr
Dec 23, 12:33 PM CSTMesoscale DiscussionSPCCalhoun, Cerro Gordo, Hancock, Humboldt, Kossuth, Mitchell and 7 more4 hr
Dec 23, 5:15 PM CSTMesoscale DiscussionSPCKossuth, Winnebago6 hr
Dec 29, 10:02 AM CSTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 37 more5 hr
Dec 29, 2:17 PM CSTMesoscale DiscussionSPCBenton, Black Hawk, Boone, Bremer, Buchanan, Cedar and 26 more4 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. August 10, 20209mesoscale discussions
  2. June 5, 20205mesoscale discussions
  3. September 6, 20205mesoscale discussions
  4. November 10, 20205mesoscale discussions
  5. March 28, 20204mesoscale discussions
  6. May 14, 20204mesoscale discussions
  7. June 4, 20204mesoscale discussions
  8. June 21, 20204mesoscale discussions
  9. June 26, 20204mesoscale discussions
  10. July 9, 20204mesoscale discussions
  11. July 11, 20204mesoscale discussions
  12. August 28, 20204mesoscale discussions

Nearby

Alerts in force nowTornadoes on recordThe radar archive20192021

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.