Alert archive / Iowa / Mesoscale Discussions

Mesoscale Discussions in Iowa, 2026

214 mesoscale discussions in 2026. 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 2026. Tap one for its archive.

Mesoscale Discussions: 214
Busiest month: June43 mesoscale discussions
Busiest day: June 10, 202610 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.

Issued	Product	Office	Counties	Lasted
Feb 17, 5:22 PM CST	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 33 more	53 min
Feb 19, 12:18 PM CST	Mesoscale Discussion	SPC	Harrison, Monona, Pottawattamie, Shelby	6 hr
Feb 19, 6:07 PM CST	Mesoscale Discussion	SPC	Audubon, Black Hawk, Boone, Bremer, Butler, Calhoun and 18 more	6 hr
Feb 19, 11:00 PM CST	Mesoscale Discussion	SPC	Allamakee, Bremer, Chickasaw, Clayton, Fayette, Winneshiek	5 hr
Mar 6, 1:50 PM CST	Mesoscale Discussion	SPC	Adair, Adams, Cass, Fremont, Mills, Montgomery and 5 more	2 hr
Mar 6, 5:23 PM CST	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Cass, Clarke and 15 more	2 hr
Mar 6, 7:12 PM CST	Mesoscale Discussion	SPC	Audubon, Buena Vista, Calhoun, Carroll, Cass, Cherokee and 20 more	2 hr
Mar 6, 9:43 PM CST	Mesoscale Discussion	SPC	Appanoose, Benton, Black Hawk, Buchanan, Clarke, Davis and 24 more	2 hr
Mar 10, 1:53 PM CDT	Mesoscale Discussion	SPC	Des Moines, Henry, Jefferson, Lee, Louisa, Muscatine and 2 more	3 hr
Mar 10, 4:53 PM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Jackson, Johnson, Jones, Muscatine and 1 more	97 min
Mar 10, 5:41 PM CDT	Mesoscale Discussion	SPC	Appanoose, Lee	2 hr
Mar 10, 7:21 PM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Dubuque, Jackson, Johnson, Jones and 2 more	84 min
Mar 10, 7:51 PM CDT	Mesoscale Discussion	SPC	Des Moines, Lee	54 min
Mar 10, 8:22 PM CDT	Mesoscale Discussion	SPC	Lee	83 min
Mar 10, 10:01 PM CDT	Mesoscale Discussion	SPC	Lee	89 min
Mar 14, 11:55 PM CDT	Mesoscale Discussion	SPC	Dickinson, Emmet, Osceola, Winnebago	5 hr
Mar 15, 9:49 AM CDT	Mesoscale Discussion	SPC	Audubon, Boone, Buena Vista, Calhoun, Carroll, Cass and 31 more	6 hr
Mar 26, 7:58 PM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Van Buren, Wapello, Wayne	2 hr
Mar 30, 8:57 PM CDT	Mesoscale Discussion	SPC	Adair, Audubon, Benton, Black Hawk, Boone, Buchanan and 29 more	2 hr
Mar 30, 11:29 PM CDT	Mesoscale Discussion	SPC	Adair, Benton, Black Hawk, Boone, Buchanan, Cedar and 29 more	2 hr
Mar 31, 1:54 AM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Henry, Jackson, Johnson, Louisa and 3 more	96 min
Mar 31, 7:46 AM CDT	Mesoscale Discussion	SPC	Des Moines, Henry, Louisa	89 min
Apr 2, 12:28 PM CDT	Mesoscale Discussion	SPC	Appanoose, Cedar, Clarke, Clinton, Davis, Decatur and 25 more	3 hr
Apr 2, 3:41 PM CDT	Mesoscale Discussion	SPC	Appanoose, Benton, Cedar, Clinton, Davis, Des Moines and 18 more	94 min
Apr 2, 4:26 PM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Jackson, Johnson, Jones, Louisa and 3 more	94 min
Apr 3, 1:26 PM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Decatur, Des Moines, Henry, Jefferson and 8 more	2 hr
Apr 7, 12:36 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Cass, Decatur, Harrison, Mills and 5 more	6 hr
Apr 13, 11:03 AM CDT	Mesoscale Discussion	SPC	Clinton, Des Moines, Scott	87 min
Apr 13, 1:57 PM CDT	Mesoscale Discussion	SPC	Allamakee, Winneshiek	93 min
Apr 13, 2:42 PM CDT	Mesoscale Discussion	SPC	Lyon, Sioux	93 min
Apr 13, 2:59 PM CDT	Mesoscale Discussion	SPC	Dickinson, Emmet, Winnebago, Worth	91 min
Apr 13, 8:16 PM CDT	Mesoscale Discussion	SPC	Cerro Gordo, Chickasaw, Floyd, Hancock, Howard, Kossuth and 4 more	89 min
Apr 13, 9:15 PM CDT	Mesoscale Discussion	SPC	Allamakee, Howard, Mitchell, Winneshiek	60 min
Apr 14, 12:56 PM CDT	Mesoscale Discussion	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 29 more	2 hr
Apr 14, 3:42 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Bremer, Buchanan, Butler, Clayton and 8 more	93 min
Apr 14, 6:36 PM CDT	Mesoscale Discussion	SPC	Dubuque, Jackson, Jones	114 min
Apr 14, 7:28 PM CDT	Mesoscale Discussion	SPC	Adams, Appanoose, Clarke, Davis, Decatur, Fremont and 12 more	2 hr
Apr 14, 11:36 PM CDT	Mesoscale Discussion	SPC	Adams, Cedar, Clarke, Clinton, Fremont, Iowa and 14 more	84 min
Apr 15, 1:47 AM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Des Moines, Henry, Jefferson, Keokuk and 11 more	88 min
Apr 15, 10:22 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Benton, Black Hawk, Boone and 53 more	2 hr
Apr 15, 1:50 PM CDT	Mesoscale Discussion	SPC	Boone, Dallas, Grundy, Hamilton, Hardin, Jasper and 4 more	85 min
Apr 15, 2:14 PM CDT	Mesoscale Discussion	SPC	Appanoose, Clarke, Davis, Decatur, Lucas, Monroe and 4 more	2 hr
Apr 15, 4:49 PM CDT	Mesoscale Discussion	SPC	Dubuque	86 min
Apr 15, 6:15 PM CDT	Mesoscale Discussion	SPC	Appanoose, Benton, Cedar, Clinton, Davis, Delaware and 24 more	2 hr
Apr 17, 11:48 AM CDT	Mesoscale Discussion	SPC	Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 17 more	2 hr
Apr 17, 2:05 PM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Dubuque, Jackson, Johnson, Jones	55 min
Apr 17, 2:49 PM CDT	Mesoscale Discussion	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 24 more	116 min
Apr 17, 3:31 PM CDT	Mesoscale Discussion	SPC	Wayne	89 min
Apr 23, 11:13 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 36 more	2 hr
Apr 23, 2:37 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 34 more	83 min
Apr 23, 5:04 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Bremer, Butler and 40 more	116 min
Apr 23, 7:41 PM CDT	Mesoscale Discussion	SPC	Black Hawk, Bremer, Butler, Chickasaw, Clarke, Decatur and 16 more	2 hr
Apr 23, 8:59 PM CDT	Mesoscale Discussion	SPC	Appanoose, Benton, Cedar, Davis, Henry, Iowa and 15 more	91 min
Apr 27, 12:52 PM CDT	Mesoscale Discussion	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 13 more	2 hr
Apr 27, 4:59 PM CDT	Mesoscale Discussion	SPC	Allamakee, Benton, Bremer, Buchanan, Chickasaw, Clayton and 7 more	91 min
May 4, 3:42 PM CDT	Mesoscale Discussion	SPC	Clinton, Scott	2 hr
May 4, 6:34 PM CDT	Mesoscale Discussion	SPC	Davis, Des Moines, Henry, Jefferson, Lee, Van Buren	86 min
May 15, 3:55 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 53 more	2 hr
May 15, 7:29 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Allamakee, Audubon, Black Hawk, Boone and 62 more	2 hr
May 15, 9:07 PM CDT	Mesoscale Discussion	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 15 more	113 min
May 15, 10:53 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 45 more	2 hr
May 16, 3:20 PM CDT	Mesoscale Discussion	SPC	Adams, Clarke, Decatur, Fremont, Montgomery, Page and 3 more	85 min
May 16, 6:46 PM CDT	Mesoscale Discussion	SPC	Adams, Appanoose, Clarke, Decatur, Montgomery, Ringgold and 3 more	89 min
May 17, 1:11 PM CDT	Mesoscale Discussion	SPC	Cherokee, Harrison, Ida, Lyon, Monona, O'Brien and 4 more	2 hr
May 17, 3:31 PM CDT	Mesoscale Discussion	SPC	Lyon, O'Brien, Osceola, Sioux	89 min
May 17, 5:45 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cerro Gordo, Clay, Emmet, Floyd, Franklin and 10 more	60 min
May 17, 6:53 PM CDT	Mesoscale Discussion	SPC	Cherokee, Crawford, Fremont, Harrison, Ida, Mills and 6 more	67 min
May 17, 7:40 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 29 more	65 min
May 17, 7:49 PM CDT	Mesoscale Discussion	SPC	Cerro Gordo, Emmet, Floyd, Franklin, Hancock, Howard and 7 more	56 min
May 17, 8:18 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Emmet, Humboldt, Ida and 5 more	27 min
May 17, 9:30 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Butler, Calhoun and 37 more	90 min
May 17, 10:32 PM CDT	Mesoscale Discussion	SPC	Allamakee, Black Hawk, Boone, Bremer, Buchanan, Butler and 14 more	118 min
May 18, 1:24 AM CDT	Mesoscale Discussion	SPC	Appanoose, Cedar, Davis, Dubuque, Henry, Iowa and 12 more	96 min
May 18, 6:51 AM CDT	Mesoscale Discussion	SPC	Des Moines, Henry, Lee	84 min
May 18, 3:29 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Cass, Clarke, Decatur and 12 more	2 hr
May 18, 5:10 PM CDT	Mesoscale Discussion	SPC	Cherokee, Lyon, Monona, O'Brien, Osceola, Plymouth and 2 more	95 min
May 18, 8:54 PM CDT	Mesoscale Discussion	SPC	Appanoose, Clarke, Decatur, Jasper, Lucas, Mahaska and 7 more	3 hr
May 22, 5:24 PM CDT	Mesoscale Discussion	SPC	Fremont, Harrison, Mills, Monona, Pottawattamie	2 hr
May 24, 3:34 PM CDT	Mesoscale Discussion	SPC	Lyon, Sioux	86 min
May 24, 6:49 PM CDT	Mesoscale Discussion	SPC	Cherokee, Clay, Dickinson, Lyon, O'Brien, Osceola and 2 more	116 min
May 24, 8:48 PM CDT	Mesoscale Discussion	SPC	Cherokee, Dickinson, Lyon, O'Brien, Osceola, Plymouth and 2 more	87 min
May 25, 7:13 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Emmet, Humboldt and 12 more	92 min
May 31, 3:20 PM CDT	Mesoscale Discussion	SPC	Lyon, Plymouth, Sioux	2 hr
May 31, 9:15 PM CDT	Mesoscale Discussion	SPC	Plymouth, Sioux	2 hr
May 31, 10:46 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Crawford, Harrison, Ida and 10 more	119 min
Jun 1, 2:18 AM CDT	Mesoscale Discussion	SPC	Adams, Montgomery, Ringgold, Taylor	87 min
Jun 4, 1:29 PM CDT	Mesoscale Discussion	SPC	Adams, Audubon, Cass, Fremont, Mills, Montgomery and 1 more	3 hr
Jun 5, 3:55 PM CDT	Mesoscale Discussion	SPC	Cass, Fremont, Harrison, Mills, Montgomery, Page and 2 more	2 hr
Jun 5, 6:46 PM CDT	Mesoscale Discussion	SPC	Fremont, Mills, Montgomery, Page, Pottawattamie	89 min
Jun 5, 8:19 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Clarke, Davis, Decatur and 19 more	86 min
Jun 5, 9:18 PM CDT	Mesoscale Discussion	SPC	Allamakee	87 min
Jun 5, 10:10 PM CDT	Mesoscale Discussion	SPC	Cass, Fremont, Mills, Montgomery, Page, Pottawattamie and 1 more	95 min
Jun 5, 11:33 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Cass, Clarke, Davis and 23 more	87 min
Jun 8, 12:58 PM CDT	Mesoscale Discussion	SPC	Allamakee, Buchanan, Cedar, Clayton, Clinton, Delaware and 8 more	92 min
Jun 9, 7:59 PM CDT	Mesoscale Discussion	SPC	Harrison, Monona	91 min
Jun 10, 7:43 AM CDT	Mesoscale Discussion	SPC	Appanoose, Cedar, Davis, Decatur, Des Moines, Henry and 16 more	2 hr
Jun 10, 11:09 AM CDT	Mesoscale Discussion	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 27 more	2 hr
Jun 10, 1:00 PM CDT	Mesoscale Discussion	SPC	Allamakee, Clayton, Dubuque, Jackson	2 hr
Jun 10, 1:35 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Cass and 24 more	2 hr
Jun 10, 2:39 PM CDT	Mesoscale Discussion	SPC	Butler, Calhoun, Carroll, Cerro Gordo, Emmet, Floyd and 14 more	2 hr
Jun 10, 3:50 PM CDT	Mesoscale Discussion	SPC	Appanoose, Decatur, Lucas, Monroe, Wayne	85 min
Jun 10, 4:27 PM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Decatur, Van Buren, Wayne	63 min
Jun 10, 5:47 PM CDT	Mesoscale Discussion	SPC	Allamakee, Howard, Winneshiek	88 min
Jun 10, 5:57 PM CDT	Mesoscale Discussion	SPC	Adams, Fremont, Montgomery, Page, Ringgold, Taylor and 1 more	93 min
Jun 11, 1:51 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Cass, Fremont, Guthrie and 10 more	114 min
Jun 11, 4:59 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Cass, Clarke, Decatur and 13 more	2 hr
Jun 11, 6:33 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Cass, Clarke, Davis and 17 more	87 min
Jun 11, 9:53 AM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Des Moines, Henry, Jones, Lee and 4 more	97 min
Jun 11, 1:08 PM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Des Moines, Henry, Jefferson, Johnson and 10 more	3 hr
Jun 11, 3:07 PM CDT	Mesoscale Discussion	SPC	Cedar, Davis, Des Moines, Henry, Jefferson, Johnson and 8 more	113 min
Jun 13, 8:03 AM CDT	Mesoscale Discussion	SPC	Adams, Fremont, Mills, Montgomery, Page, Pottawattamie and 2 more	117 min
Jun 13, 11:51 AM CDT	Mesoscale Discussion	SPC	Appanoose, Decatur, Wayne	84 min
Jun 13, 3:17 PM CDT	Mesoscale Discussion	SPC	Cass, Fremont, Mills, Montgomery, Page, Pottawattamie	118 min
Jun 16, 11:28 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 3 more	2 hr
Jun 17, 2:36 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Benton, Black Hawk, Boone and 74 more	2 hr
Jun 17, 5:42 AM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Boone, Bremer, Buchanan, Butler and 32 more	2 hr
Jun 17, 8:16 AM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Des Moines, Henry, Iowa, Jackson and 12 more	59 min
Jun 17, 12:37 PM CDT	Mesoscale Discussion	SPC	Allamakee, Chickasaw, Floyd, Howard, Mitchell, Winneshiek and 1 more	83 min
Jun 17, 4:45 PM CDT	Mesoscale Discussion	SPC	Allamakee, Chickasaw, Clayton, Delaware, Dubuque, Fayette and 2 more	2 hr
Jun 28, 2:37 AM CDT	Mesoscale Discussion	SPC	Dickinson, Lyon, O'Brien, Osceola, Sioux	113 min
Jun 28, 7:34 AM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Bremer, Butler, Cerro Gordo, Chickasaw and 18 more	116 min
Jun 28, 10:14 AM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Bremer, Buchanan, Butler, Cedar and 14 more	2 hr
Jun 29, 4:00 PM CDT	Mesoscale Discussion	SPC	Lyon, Sioux	3 hr
Jun 29, 8:59 PM CDT	Mesoscale Discussion	SPC	Clay, Dickinson, Lyon, O'Brien, Osceola, Plymouth and 1 more	91 min
Jun 30, 1:42 AM CDT	Mesoscale Discussion	SPC	Cherokee, Clay, Dickinson, Emmet, Lyon, O'Brien and 4 more	93 min
Jun 30, 4:04 AM CDT	Mesoscale Discussion	SPC	Emmet, Howard, Kossuth, Mitchell, Winnebago, Worth	86 min
Jul 1, 3:29 AM CDT	Mesoscale Discussion	SPC	Clay, Dickinson, Emmet, Lyon, O'Brien, Osceola and 1 more	91 min
Jul 1, 6:59 AM CDT	Mesoscale Discussion	SPC	Allamakee, Howard, Mitchell, Winneshiek, Worth	3 hr
Jul 1, 2:34 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Benton, Black Hawk, Buchanan, Cedar and 34 more	116 min
Jul 1, 6:11 PM CDT	Mesoscale Discussion	SPC	Allamakee, Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee and 27 more	2 hr
Jul 1, 10:28 PM CDT	Mesoscale Discussion	SPC	Allamakee	92 min
Jul 2, 11:05 AM CDT	Mesoscale Discussion	SPC	Allamakee, Black Hawk, Bremer, Buchanan, Butler, Calhoun and 22 more	85 min
Jul 2, 1:10 PM CDT	Mesoscale Discussion	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 19 more	95 min
Jul 2, 3:53 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Buchanan, Clayton, Delaware, Dubuque and 9 more	97 min
Jul 2, 5:42 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Boone, Buchanan, Butler, Cedar and 24 more	2 hr
Jul 2, 5:52 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Emmet, Ida and 8 more	83 min
Jul 2, 8:47 PM CDT	Mesoscale Discussion	SPC	Clay, Dickinson, Emmet, Lyon, O'Brien, Osceola and 1 more	118 min
Jul 3, 1:46 AM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Carroll, Cherokee, Crawford, Greene and 8 more	89 min
Jul 3, 2:52 PM CDT	Mesoscale Discussion	SPC	Fremont, Harrison, Mills, Monona, Montgomery, Pottawattamie	113 min
Jul 3, 5:05 PM CDT	Mesoscale Discussion	SPC	Buchanan, Cedar, Clayton, Clinton, Delaware, Dubuque and 6 more	115 min
Jul 3, 8:33 PM CDT	Mesoscale Discussion	SPC	Des Moines, Henry, Louisa, Muscatine, Scott, Washington	117 min
Jul 3, 9:16 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Cass, Fremont, Mills and 6 more	119 min
Jul 4, 2:30 AM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Iowa, Jasper, Jefferson, Keokuk and 10 more	2 hr
Jul 8, 1:15 PM CDT	Mesoscale Discussion	SPC	Howard, Worth	2 hr
Jul 8, 3:12 PM CDT	Mesoscale Discussion	SPC	Audubon, Buena Vista, Calhoun, Carroll, Cherokee, Crawford and 13 more	2 hr
Jul 8, 6:21 PM CDT	Mesoscale Discussion	SPC	Adair, Allamakee, Audubon, Benton, Black Hawk, Boone and 40 more	114 min
Jul 8, 7:33 PM CDT	Mesoscale Discussion	SPC	Fremont, Harrison, Mills, Pottawattamie	117 min
Jul 8, 9:15 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Bremer, Buchanan, Butler, Franklin and 9 more	2 hr
Jul 8, 10:08 PM CDT	Mesoscale Discussion	SPC	Adams, Audubon, Cass, Fremont, Mills, Montgomery and 3 more	2 hr
Jul 10, 2:17 PM CDT	Mesoscale Discussion	SPC	Davis, Lee, Van Buren	118 min
Jul 20, 7:55 AM CDT	Mesoscale Discussion	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 28 more	2 hr
Jul 20, 11:36 AM CDT	Mesoscale Discussion	SPC	Des Moines, Henry, Iowa, Jefferson, Johnson, Keokuk and 6 more	114 min
Jul 20, 1:53 PM CDT	Mesoscale Discussion	SPC	Allamakee, Howard, Winneshiek	2 hr
Jul 20, 2:48 PM CDT	Mesoscale Discussion	SPC	Black Hawk, Boone, Butler, Cerro Gordo, Franklin, Grundy and 15 more	117 min
Jul 20, 4:34 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Bremer, Buchanan, Butler, Grundy and 13 more	116 min
Jul 20, 5:37 PM CDT	Mesoscale Discussion	SPC	Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 8 more	53 min
Jul 20, 6:35 PM CDT	Mesoscale Discussion	SPC	Jasper, Mahaska, Marion, Story	85 min
Jul 20, 7:20 PM CDT	Mesoscale Discussion	SPC	Allamakee, Clayton, Fayette, Howard, Winneshiek	115 min
Jul 20, 9:07 PM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Jasper, Lucas, Mahaska, Marion and 4 more	83 min
Jul 25, 7:45 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Emmet, Hancock and 9 more	2 hr
Jul 25, 9:07 PM CDT	Mesoscale Discussion	SPC	Lyon, O'Brien, Osceola, Plymouth, Sioux	83 min
Jul 25, 11:00 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Cerro Gordo, Clay, Dickinson, Emmet and 12 more	2 hr
Jul 26, 3:54 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 24 more	96 min
Jul 27, 12:49 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Cass, Clarke and 23 more	116 min
Jul 30, 9:44 PM CDT	Mesoscale Discussion	SPC	Fremont, Harrison, Mills, Monona, Montgomery, Pottawattamie	2 hr
Aug 5, 12:01 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Cass, Clarke, Fremont, Lucas and 9 more	119 min
Aug 7, 10:52 AM CDT	Mesoscale Discussion	SPC	Buena Vista, Cerro Gordo, Emmet, Hancock, Humboldt, Kossuth and 4 more	83 min
Aug 7, 1:16 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Butler and 45 more	119 min
Aug 7, 4:57 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Boone, Buchanan, Cedar, Clinton and 15 more	2 hr
Aug 7, 8:48 PM CDT	Mesoscale Discussion	SPC	Appanoose, Clarke, Davis, Des Moines, Henry, Jasper and 11 more	87 min
Aug 8, 11:18 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Cass, Clarke, Decatur, Fremont and 11 more	117 min
Aug 9, 4:38 AM CDT	Mesoscale Discussion	SPC	Cerro Gordo, Dickinson, Emmet, Floyd, Hancock, Howard and 5 more	3 hr
Aug 9, 8:14 PM CDT	Mesoscale Discussion	SPC	Clinton, Des Moines, Jackson, Lee, Louisa, Muscatine and 1 more	2 hr
Aug 9, 9:07 PM CDT	Mesoscale Discussion	SPC	Fremont, Page, Ringgold, Taylor	113 min
Aug 9, 10:53 PM CDT	Mesoscale Discussion	SPC	Clinton, Scott	2 hr
Aug 10, 12:47 PM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Jackson, Jones, Muscatine, Scott	2 hr
Aug 10, 9:07 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Buchanan, Cedar, Clinton, Delaware and 7 more	113 min
Aug 11, 1:15 AM CDT	Mesoscale Discussion	SPC	Cherokee, Clay, Dickinson, Lyon, O'Brien, Osceola and 2 more	2 hr
Aug 11, 4:13 AM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Boone, Bremer, Buchanan, Buena Vista and 33 more	2 hr
Aug 11, 9:00 AM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Dubuque, Jackson, Jones, Muscatine and 1 more	2 hr
Aug 11, 8:04 PM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Delaware, Dubuque, Jackson, Jones and 2 more	2 hr
Aug 12, 4:37 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Carroll, Cass and 34 more	53 min
Aug 12, 7:30 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Boone, Clarke, Dallas, Guthrie and 11 more	2 hr
Aug 13, 2:42 AM CDT	Mesoscale Discussion	SPC	Harrison, Shelby	2 hr
Aug 13, 4:49 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Carroll, Cass and 13 more	116 min
Aug 13, 7:27 AM CDT	Mesoscale Discussion	SPC	Benton, Cedar, Clarke, Davis, Henry, Iowa and 16 more	2 hr
Aug 13, 10:28 AM CDT	Mesoscale Discussion	SPC	Des Moines, Henry, Lee, Louisa	3 hr
Aug 13, 11:03 PM CDT	Mesoscale Discussion	SPC	Cedar, Des Moines, Henry, Johnson, Lee, Louisa and 3 more	117 min
Aug 14, 2:20 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 34 more	2 hr
Aug 14, 11:42 PM CDT	Mesoscale Discussion	SPC	Davis, Lee, Van Buren	2 hr
Aug 15, 4:02 PM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Henry, Jefferson, Lee, Monroe and 2 more	118 min
Aug 18, 1:52 PM CDT	Mesoscale Discussion	SPC	Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 10 more	113 min
Aug 18, 2:47 PM CDT	Mesoscale Discussion	SPC	Clay, Dickinson, Emmet, Hancock, Humboldt, Kossuth and 8 more	118 min
Aug 18, 5:29 PM CDT	Mesoscale Discussion	SPC	Allamakee, Clayton, Delaware, Dubuque	2 hr
Aug 19, 12:26 PM CDT	Mesoscale Discussion	SPC	Fremont, Mills, Montgomery, Page	2 hr
Aug 19, 2:30 PM CDT	Mesoscale Discussion	SPC	Page, Ringgold, Taylor	90 min
Aug 20, 7:13 PM CDT	Mesoscale Discussion	SPC	Lyon	62 min
Aug 21, 2:22 PM CDT	Mesoscale Discussion	SPC	Clinton, Jackson, Scott	113 min
Sep 1, 9:11 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Emmet, Hancock and 12 more	2 hr
Sep 1, 11:56 PM CDT	Mesoscale Discussion	SPC	Emmet, Winnebago, Worth	2 hr
Sep 3, 2:34 AM CDT	Mesoscale Discussion	SPC	Buena Vista, Cerro Gordo, Cherokee, Clay, Dickinson, Emmet and 12 more	116 min
Sep 4, 2:10 PM CDT	Mesoscale Discussion	SPC	Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 13 more	2 hr
Sep 5, 12:48 AM CDT	Mesoscale Discussion	SPC	Lyon	117 min
Sep 6, 2:45 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Carroll, Cass, Crawford and 11 more	2 hr
Sep 8, 2:49 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Benton, Black Hawk, Boone and 38 more	116 min
Sep 8, 7:33 PM CDT	Mesoscale Discussion	SPC	Cedar, Des Moines, Henry, Iowa, Jefferson, Johnson and 9 more	117 min
Sep 11, 8:36 PM CDT	Mesoscale Discussion	SPC	Lyon, Sioux	114 min
Sep 14, 3:23 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Carroll, Cass, Crawford and 11 more	2 hr
Sep 14, 6:18 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Cass, Clarke, Dallas and 14 more	57 min
Sep 14, 6:32 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Cerro Gordo, Crawford, Franklin, Hancock and 10 more	58 min
Sep 14, 7:20 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Cass, Clarke, Dallas and 10 more	55 min
Sep 14, 9:11 PM CDT	Mesoscale Discussion	SPC	Benton, Black Hawk, Grundy, Hardin, Iowa, Jasper and 12 more	64 min
Sep 15, 2:35 PM CDT	Mesoscale Discussion	SPC	Lee	115 min
Sep 19, 7:05 PM CDT	Mesoscale Discussion	SPC	Decatur, Ringgold	85 min

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.

Nearby

Alerts in force now Tornadoes on record The radar archive 2025

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.