Alert archive / Iowa / Severe Thunderstorm Warnings

Severe Thunderstorm Warnings in Iowa, 2015

395 severe thunderstorm warnings in 2015. 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 severe thunderstorm warnings reaches back to 1986.

Severe Thunderstorm Warnings by county

Each county as a circle sized by its count in 2015. Tap one for its archive.

Severe Thunderstorm Warnings: 395
Busiest month: June118 severe thunderstorm warnings
Busiest day: June 22, 201534 severe thunderstorm warnings

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
Apr 1, 6:30 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	33 min
Apr 1, 11:05 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	25 min
Apr 1, 11:19 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills	26 min
Apr 7, 12:22 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	38 min
Apr 7, 10:02 PM CDT	Severe Thunderstorm Warning	DMX	Davis, Wapello	43 min
Apr 7, 10:37 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Keokuk, Washington	38 min
Apr 7, 10:48 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Jefferson, Louisa	42 min
Apr 7, 11:27 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson	48 min
Apr 7, 11:35 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	40 min
Apr 7, 11:55 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Lee	50 min
Apr 8, 12:18 AM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	42 min
Apr 8, 12:39 AM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Jefferson, Louisa, Washington	51 min
Apr 8, 9:12 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams	33 min
Apr 8, 12:23 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk	37 min
Apr 8, 10:21 PM CDT	Severe Thunderstorm Warning	DMX	Story	24 min
Apr 8, 10:28 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Marshall, Tama	47 min
Apr 9, 1:12 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Lucas, Wayne	33 min
Apr 9, 1:45 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Wayne	30 min
Apr 9, 2:05 PM CDT	Severe Thunderstorm Warning	DMX	Monroe	40 min
Apr 9, 3:19 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk	26 min
Apr 9, 4:14 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Johnson, Louisa, Muscatine, Washington	46 min
Apr 9, 4:32 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Lee	43 min
Apr 9, 5:00 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Muscatine, Scott	45 min
Apr 9, 5:29 PM CDT	Severe Thunderstorm Warning	ARX	Clayton	30 min
Apr 9, 5:45 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	30 min
Apr 12, 6:02 PM CDT	Severe Thunderstorm Warning	FSD	Sioux	28 min
Apr 12, 6:25 PM CDT	Severe Thunderstorm Warning	FSD	Sioux	50 min
Apr 18, 1:29 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur	31 min
May 3, 5:26 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	49 min
May 3, 5:34 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Dickinson	29 min
May 3, 5:42 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Kossuth	48 min
May 3, 6:19 PM CDT	Severe Thunderstorm Warning	DMX	Emmet, Kossuth, Palo Alto	41 min
May 3, 6:43 PM CDT	Severe Thunderstorm Warning	DMX	Winnebago, Worth	47 min
May 3, 7:02 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Kossuth, Pocahontas	43 min
May 3, 7:14 PM CDT	Severe Thunderstorm Warning	DMX	Worth	46 min
May 3, 7:18 PM CDT	Severe Thunderstorm Warning	ARX	Mitchell	42 min
May 3, 7:33 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Humboldt, Webster, Wright	42 min
May 3, 7:47 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Humboldt, Pocahontas, Webster	43 min
May 3, 7:59 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Worth, Wright	46 min
May 3, 8:28 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster	47 min
May 3, 8:31 PM CDT	Severe Thunderstorm Warning	OAX	Monona	29 min
May 3, 9:05 PM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Webster, Wright	25 min
May 3, 9:25 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Sioux	35 min
May 3, 9:53 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton	22 min
May 3, 9:54 PM CDT	Severe Thunderstorm Warning	DMX	Webster	14 min
May 3, 10:25 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware, Dubuque, Jones, Linn	35 min
May 3, 10:38 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas, Webster	37 min
May 3, 11:47 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Butler, Grundy	22 min
May 4, 12:25 AM CDT	Severe Thunderstorm Warning	OAX	Fremont	35 min
May 4, 8:08 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Decatur, Lucas, Wayne	39 min
May 7, 3:05 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk	40 min
May 7, 3:29 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Lee	46 min
May 7, 4:41 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Pottawattamie	34 min
May 7, 4:56 PM CDT	Severe Thunderstorm Warning	DMX	Cass	33 min
May 7, 6:33 PM CDT	Severe Thunderstorm Warning	DMX	Worth	15 min
May 7, 7:04 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	26 min
May 7, 7:36 PM CDT	Severe Thunderstorm Warning	DMX	Worth	14 min
May 7, 7:56 PM CDT	Severe Thunderstorm Warning	ARX	Mitchell	23 min
May 10, 12:24 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	24 min
May 10, 1:34 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie	41 min
May 10, 1:53 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	37 min
May 10, 2:31 PM CDT	Severe Thunderstorm Warning	OAX	Monona	29 min
May 10, 3:15 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	30 min
May 10, 3:27 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, Sioux	33 min
May 10, 3:51 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	24 min
May 10, 8:02 PM CDT	Severe Thunderstorm Warning	DMX	Carroll	28 min
May 10, 8:18 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Sac	27 min
May 10, 8:41 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas	49 min
May 10, 9:32 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison	18 min
May 17, 3:11 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Greene	49 min
May 25, 5:22 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	23 min
May 25, 5:41 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, Osceola	31 min
May 25, 5:44 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	46 min
May 25, 6:00 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	27 min
May 25, 6:18 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills	42 min
May 25, 6:46 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Pottawattamie	44 min
May 25, 6:52 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	38 min
May 25, 7:05 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	28 min
May 25, 7:10 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Sac	35 min
May 25, 8:00 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Webster	30 min
Jun 6, 2:39 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	36 min
Jun 6, 3:10 PM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	50 min
Jun 6, 10:32 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth	27 min
Jun 6, 10:51 PM CDT	Severe Thunderstorm Warning	OAX	Monona	24 min
Jun 6, 11:51 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona, Shelby	24 min
Jun 6, 11:54 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford, Sac	51 min
Jun 7, 12:26 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Sac, Webster	49 min
Jun 7, 12:48 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	42 min
Jun 7, 12:59 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Hamilton, Webster	46 min
Jun 7, 3:25 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor, Union	50 min
Jun 7, 3:50 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Ringgold	42 min
Jun 7, 3:57 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Wayne	48 min
Jun 7, 4:01 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold	28 min
Jun 7, 5:10 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson	40 min
Jun 7, 5:41 PM CDT	Severe Thunderstorm Warning	DVN	Van Buren	64 min
Jun 7, 5:56 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Lee	64 min
Jun 10, 4:16 PM CDT	Severe Thunderstorm Warning	OAX	Page	24 min
Jun 10, 4:23 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	67 min
Jun 10, 5:24 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold, Union	55 min
Jun 10, 5:46 PM CDT	Severe Thunderstorm Warning	DMX	Union	44 min
Jun 10, 6:23 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Wayne	67 min
Jun 10, 6:48 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Lucas	57 min
Jun 10, 7:37 PM CDT	Severe Thunderstorm Warning	DMX	Warren	53 min
Jun 10, 7:41 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	49 min
Jun 10, 9:01 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	29 min
Jun 10, 9:16 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Lee	44 min
Jun 10, 9:55 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Lee	29 min
Jun 11, 4:16 PM CDT	Severe Thunderstorm Warning	OAX	Page	29 min
Jun 11, 5:27 PM CDT	Severe Thunderstorm Warning	DVN	Scott	33 min
Jun 11, 6:19 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	41 min
Jun 11, 6:46 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Union	33 min
Jun 11, 8:01 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Monroe, Wayne	44 min
Jun 11, 8:30 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Monroe, Wapello	45 min
Jun 11, 8:35 PM CDT	Severe Thunderstorm Warning	DVN	Van Buren	55 min
Jun 15, 4:01 PM CDT	Severe Thunderstorm Warning	DVN	Muscatine, Scott	44 min
Jun 20, 3:19 AM CDT	Severe Thunderstorm Warning	FSD	Lyon	41 min
Jun 20, 3:56 AM CDT	Severe Thunderstorm Warning	FSD	Clay, Dickinson, Lyon, O'Brien, Osceola	49 min
Jun 20, 11:26 AM CDT	Severe Thunderstorm Warning	DVN	Cedar, Johnson, Jones, Linn	17 min
Jun 20, 1:36 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Clinton	24 min
Jun 20, 2:20 PM CDT	Severe Thunderstorm Warning	DVN	Scott	12 min
Jun 20, 2:38 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	24 min
Jun 20, 4:48 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Poweshiek	42 min
Jun 20, 5:13 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	32 min
Jun 20, 5:18 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion	57 min
Jun 20, 5:18 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa	27 min
Jun 20, 5:41 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa, Johnson	49 min
Jun 20, 5:45 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Mahaska, Marion, Monroe, Wapello	45 min
Jun 20, 6:18 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Monroe, Wapello	42 min
Jun 20, 6:40 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	50 min
Jun 20, 6:57 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose	48 min
Jun 20, 6:59 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Jefferson, Lee, Van Buren, Washington	61 min
Jun 20, 7:07 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Wayne	23 min
Jun 20, 7:25 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Lee, Louisa	65 min
Jun 21, 6:40 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Ringgold	50 min
Jun 21, 9:49 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Madison, Union, Warren	39 min
Jun 22, 4:14 AM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Linn	46 min
Jun 22, 4:41 AM CDT	Severe Thunderstorm Warning	FSD	Lyon	34 min
Jun 22, 5:06 AM CDT	Severe Thunderstorm Warning	FSD	Lyon, O'Brien, Osceola, Sioux	39 min
Jun 22, 5:20 AM CDT	Severe Thunderstorm Warning	FSD	Cherokee, O'Brien, Plymouth, Sioux, Woodbury	40 min
Jun 22, 5:23 AM CDT	Severe Thunderstorm Warning	FSD	Dickinson, O'Brien, Osceola	37 min
Jun 22, 5:30 AM CDT	Severe Thunderstorm Warning	FSD	Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux	45 min
Jun 22, 5:32 AM CDT	Severe Thunderstorm Warning	DMX	Kossuth, Winnebago	28 min
Jun 22, 5:35 AM CDT	Severe Thunderstorm Warning	DMX	Emmet, Palo Alto	25 min
Jun 22, 5:52 AM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Clay, Ida, O'Brien, Plymouth and 1 more	53 min
Jun 22, 5:58 AM CDT	Severe Thunderstorm Warning	DMX	Emmet, Humboldt, Kossuth, Palo Alto, Pocahontas	47 min
Jun 22, 5:59 AM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Winnebago, Worth	46 min
Jun 22, 6:33 AM CDT	Severe Thunderstorm Warning	ARX	Mitchell	42 min
Jun 22, 6:43 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Hancock, Humboldt, Kossuth, Palo Alto, Pocahontas and 4 more	47 min
Jun 22, 6:46 AM CDT	Severe Thunderstorm Warning	ARX	Howard, Winneshiek	59 min
Jun 22, 6:54 AM CDT	Severe Thunderstorm Warning	ARX	Clayton	66 min
Jun 22, 7:16 AM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin, Grundy, Hamilton, Hardin, Webster and 1 more	44 min
Jun 22, 7:54 AM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Bremer, Butler, Franklin, Grundy, Hamilton and 1 more	51 min
Jun 22, 7:58 AM CDT	Severe Thunderstorm Warning	ARX	Allamakee, Clayton, Fayette	62 min
Jun 22, 8:09 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan	51 min
Jun 22, 8:22 AM CDT	Severe Thunderstorm Warning	DMX	Tama	36 min
Jun 22, 8:34 AM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque	41 min
Jun 22, 8:40 AM CDT	Severe Thunderstorm Warning	ARX	Clayton	50 min
Jun 22, 8:44 AM CDT	Severe Thunderstorm Warning	DVN	Benton, Linn	46 min
Jun 22, 9:00 AM CDT	Severe Thunderstorm Warning	DVN	Clinton, Dubuque, Jackson, Jones	60 min
Jun 22, 9:24 AM CDT	Severe Thunderstorm Warning	DMX	Humboldt, Webster, Wright	44 min
Jun 22, 10:06 AM CDT	Severe Thunderstorm Warning	DMX	Tama	20 min
Jun 22, 12:31 PM CDT	Severe Thunderstorm Warning	DVN	Linn	29 min
Jun 22, 12:41 PM CDT	Severe Thunderstorm Warning	DVN	Jones, Linn	64 min
Jun 22, 1:13 PM CDT	Severe Thunderstorm Warning	DVN	Cedar	47 min
Jun 22, 2:44 PM CDT	Severe Thunderstorm Warning	DVN	Linn	33 min
Jun 22, 3:11 PM CDT	Severe Thunderstorm Warning	DVN	Cedar	19 min
Jun 22, 3:15 PM CDT	Severe Thunderstorm Warning	DVN	Clinton	13 min
Jun 22, 6:30 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	45 min
Jun 22, 7:13 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	32 min
Jun 24, 3:00 AM CDT	Severe Thunderstorm Warning	DMX	Crawford	30 min
Jun 24, 3:29 AM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford, Sac	31 min
Jun 24, 4:03 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll	13 min
Jun 24, 12:36 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford, Sac	54 min
Jun 24, 12:37 PM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	38 min
Jun 24, 6:20 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Guthrie	55 min
Jun 24, 6:27 PM CDT	Severe Thunderstorm Warning	OAX	Shelby	63 min
Jun 24, 6:31 PM CDT	Severe Thunderstorm Warning	DMX	Guthrie	44 min
Jun 24, 6:50 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Guthrie	35 min
Jun 24, 7:15 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	45 min
Jun 24, 7:47 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	28 min
Jun 24, 7:56 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Warren	49 min
Jun 24, 8:29 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Madison, Union	17 min
Jun 24, 8:32 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Madison, Warren	43 min
Jun 24, 9:10 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Marion, Monroe, Warren	50 min
Jun 24, 9:17 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Decatur, Wayne	58 min
Jun 24, 9:45 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Mahaska, Marion, Monroe, Wapello	60 min
Jun 24, 9:52 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Greene, Guthrie	38 min
Jun 24, 10:15 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Wayne	45 min
Jun 24, 10:15 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Linn	60 min
Jun 24, 10:28 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Wapello	47 min
Jun 25, 12:14 AM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Warren	46 min
Jun 25, 12:38 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Guthrie	52 min
Jun 25, 1:25 AM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk, Warren	35 min
Jun 28, 4:47 PM CDT	Severe Thunderstorm Warning	DVN	Van Buren	43 min
Jun 29, 5:20 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	55 min
Jun 29, 6:06 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee	54 min
Jun 29, 6:40 PM CDT	Severe Thunderstorm Warning	ARX	Clayton	50 min
Jun 29, 9:48 PM CDT	Severe Thunderstorm Warning	DVN	Scott	27 min
Jul 6, 1:11 AM CDT	Severe Thunderstorm Warning	FSD	Lyon, Plymouth, Sioux	49 min
Jul 6, 3:59 PM CDT	Severe Thunderstorm Warning	DVN	Muscatine, Scott	46 min
Jul 6, 5:12 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson	48 min
Jul 6, 5:45 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Washington	45 min
Jul 13, 4:36 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	39 min
Jul 13, 4:42 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Wayne	29 min
Jul 13, 5:08 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	27 min
Jul 15, 9:22 PM CDT	Severe Thunderstorm Warning	OAX	Mills	38 min
Jul 15, 11:45 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	30 min
Jul 16, 2:40 AM CDT	Severe Thunderstorm Warning	OAX	Mills, Pottawattamie	35 min
Jul 16, 3:06 AM CDT	Severe Thunderstorm Warning	OAX	Mills, Montgomery, Pottawattamie	54 min
Jul 16, 3:22 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Montgomery, Page	53 min
Jul 16, 5:13 PM CDT	Severe Thunderstorm Warning	DVN	Henry	32 min
Jul 16, 5:32 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines	43 min
Jul 16, 5:34 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	41 min
Jul 16, 6:17 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	43 min
Jul 17, 10:53 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Woodbury	52 min
Jul 17, 11:23 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Ida, O'Brien, Plymouth, Sioux, Woodbury	52 min
Jul 18, 12:29 AM CDT	Severe Thunderstorm Warning	FSD	Clay, O'Brien	31 min
Jul 18, 1:31 AM CDT	Severe Thunderstorm Warning	DMX	Kossuth, Winnebago	44 min
Jul 18, 2:10 AM CDT	Severe Thunderstorm Warning	DMX	Winnebago, Worth	34 min
Jul 18, 2:57 AM CDT	Severe Thunderstorm Warning	ARX	Howard, Mitchell	27 min
Jul 24, 4:26 AM CDT	Severe Thunderstorm Warning	DMX	Winnebago	39 min
Jul 24, 5:00 AM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Winnebago, Worth	45 min
Jul 24, 9:04 AM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hardin	41 min
Jul 24, 1:04 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	56 min
Jul 24, 1:22 PM CDT	Severe Thunderstorm Warning	DMX	Davis, Wapello	38 min
Jul 24, 1:45 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose	22 min
Jul 24, 7:18 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills	27 min
Jul 24, 7:46 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills	29 min
Jul 24, 7:49 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Montgomery, Pottawattamie	26 min
Jul 24, 8:06 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Cass	39 min
Jul 25, 2:05 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Montgomery, Page	25 min
Jul 25, 2:30 AM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor, Union	60 min
Jul 25, 2:31 AM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Page	29 min
Jul 26, 4:49 AM CDT	Severe Thunderstorm Warning	DMX	Polk	26 min
Jul 27, 10:35 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Greene, Guthrie	25 min
Jul 27, 10:58 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Dallas, Greene, Guthrie	47 min
Jul 27, 12:13 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Polk, Story	32 min
Jul 27, 2:12 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Lucas, Monroe, Wayne	48 min
Jul 27, 2:33 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Monroe, Wapello	42 min
Jul 27, 3:08 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Monroe, Wapello	52 min
Jul 27, 3:15 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose	45 min
Jul 28, 4:40 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek, Tama	35 min
Jul 28, 4:45 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Iowa	30 min
Jul 28, 5:24 PM CDT	Severe Thunderstorm Warning	DMX	Marion, Warren	66 min
Jul 28, 5:50 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion	40 min
Jul 28, 6:07 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Monroe, Wapello	38 min
Jul 28, 6:34 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska	27 min
Jul 28, 6:38 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	52 min
Jul 28, 6:39 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Keokuk, Washington	66 min
Jul 28, 6:49 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery	26 min
Jul 28, 7:18 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	18 min
Jul 28, 8:10 PM CDT	Severe Thunderstorm Warning	DMX	Marion, Warren	50 min
Jul 28, 8:37 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Marion, Monroe, Warren	53 min
Jul 28, 9:04 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Lucas, Monroe, Wayne	41 min
Jul 28, 9:26 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Lucas, Wayne	39 min
Jul 28, 9:35 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Lucas, Monroe, Wayne	70 min
Jul 28, 10:03 PM CDT	Severe Thunderstorm Warning	DMX	Davis, Monroe, Wapello	42 min
Jul 28, 10:14 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold, Taylor	35 min
Jul 28, 11:36 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Wayne	39 min
Jul 31, 6:03 PM CDT	Severe Thunderstorm Warning	OAX	Harrison	42 min
Aug 2, 4:04 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	26 min
Aug 2, 4:26 AM CDT	Severe Thunderstorm Warning	OAX	Shelby	34 min
Aug 2, 4:30 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie, Shelby	45 min
Aug 2, 4:37 AM CDT	Severe Thunderstorm Warning	DMX	Audubon	41 min
Aug 2, 5:07 PM CDT	Severe Thunderstorm Warning	DMX	Adair	38 min
Aug 2, 5:22 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Polk, Warren	38 min
Aug 2, 5:45 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Madison, Union	45 min
Aug 2, 6:00 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Madison, Warren	45 min
Aug 2, 6:07 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Cass	38 min
Aug 2, 6:11 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery	49 min
Aug 2, 6:18 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion	42 min
Aug 2, 6:26 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Clarke, Madison, Ringgold, Union	49 min
Aug 2, 6:29 PM CDT	Severe Thunderstorm Warning	OAX	Mills	61 min
Aug 2, 6:41 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Madison, Warren	49 min
Aug 2, 6:58 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska	23 min
Aug 2, 7:01 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	44 min
Aug 2, 7:09 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Ringgold, Union	51 min
Aug 2, 7:19 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Decatur, Lucas, Wayne	41 min
Aug 2, 7:20 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk	40 min
Aug 2, 7:42 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Taylor	48 min
Aug 2, 7:56 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor, Union	49 min
Aug 2, 8:29 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	46 min
Aug 2, 8:49 PM CDT	Severe Thunderstorm Warning	DVN	Muscatine, Scott	26 min
Aug 2, 10:59 PM CDT	Severe Thunderstorm Warning	OAX	Page	46 min
Aug 2, 11:14 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	46 min
Aug 2, 11:40 PM CDT	Severe Thunderstorm Warning	OAX	Page	35 min
Aug 8, 9:21 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Page	39 min
Aug 8, 9:45 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery	33 min
Aug 8, 11:33 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Polk, Warren	42 min
Aug 9, 1:21 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Page	24 min
Aug 9, 6:27 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	48 min
Aug 9, 7:18 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	42 min
Aug 9, 7:58 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Sioux	47 min
Aug 9, 8:00 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Wright	33 min
Aug 9, 8:42 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	33 min
Aug 9, 9:01 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	44 min
Aug 9, 9:08 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Woodbury	67 min
Aug 9, 9:15 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth	20 min
Aug 9, 9:17 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Ida, Plymouth, Woodbury	43 min
Aug 9, 9:55 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	50 min
Aug 9, 10:02 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster, Wright	43 min
Aug 9, 10:16 PM CDT	Severe Thunderstorm Warning	OAX	Monona	29 min
Aug 9, 10:21 PM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	40 min
Aug 9, 10:40 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	50 min
Aug 9, 10:42 PM CDT	Severe Thunderstorm Warning	OAX	Monona	33 min
Aug 9, 11:00 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford	30 min
Aug 9, 11:35 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll, Guthrie	40 min
Aug 10, 12:00 AM CDT	Severe Thunderstorm Warning	DMX	Marshall, Poweshiek, Tama	45 min
Aug 10, 12:14 AM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	46 min
Aug 10, 12:59 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Madison, Union, Warren	46 min
Aug 10, 2:22 AM CDT	Severe Thunderstorm Warning	OAX	Page	23 min
Aug 18, 4:26 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Louisa, Muscatine, Scott	64 min
Aug 22, 4:15 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	30 min
Aug 22, 4:21 PM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	39 min
Aug 22, 4:59 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	20 min
Aug 22, 6:01 PM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	29 min
Aug 22, 6:50 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Pottawattamie	40 min
Aug 22, 7:14 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page	25 min
Aug 22, 9:13 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold, Taylor	47 min
Sep 6, 6:05 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Humboldt, Pocahontas	40 min
Sep 6, 6:13 PM CDT	Severe Thunderstorm Warning	DMX	Hancock	47 min
Sep 6, 6:25 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun	35 min
Sep 6, 6:30 PM CDT	Severe Thunderstorm Warning	OAX	Shelby	45 min
Sep 6, 6:52 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene	53 min
Sep 6, 7:19 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo	26 min
Sep 6, 7:54 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Hamilton, Webster	30 min
Sep 6, 9:12 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Polk	28 min
Sep 6, 9:18 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Guthrie	27 min
Sep 6, 10:05 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	40 min
Sep 7, 1:51 AM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Mahaska, Monroe, Wapello	54 min
Sep 8, 3:06 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Page	24 min
Sep 8, 3:23 AM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth, Woodbury	36 min
Sep 9, 4:41 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, Osceola	34 min
Sep 9, 5:03 PM CDT	Severe Thunderstorm Warning	FSD	Osceola	42 min
Sep 9, 5:48 PM CDT	Severe Thunderstorm Warning	FSD	Lyon, O'Brien, Osceola, Sioux	42 min
Sep 10, 12:36 AM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Winnebago, Worth	20 min
Sep 10, 7:30 AM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock	15 min
Sep 10, 8:30 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	30 min
Sep 17, 11:47 AM CDT	Severe Thunderstorm Warning	DVN	Johnson, Keokuk, Louisa, Washington	28 min
Sep 17, 7:24 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis	36 min
Sep 17, 7:50 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	25 min
Sep 17, 8:06 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	24 min
Sep 17, 8:50 PM CDT	Severe Thunderstorm Warning	DVN	Louisa, Muscatine, Washington	25 min
Sep 17, 9:14 PM CDT	Severe Thunderstorm Warning	DVN	Louisa, Muscatine	31 min
Sep 17, 9:59 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Wayne	46 min
Sep 18, 12:51 AM CDT	Severe Thunderstorm Warning	DVN	Van Buren	24 min
Sep 18, 9:36 AM CDT	Severe Thunderstorm Warning	OAX	Fremont	24 min
Sep 18, 9:53 AM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Page	37 min
Sep 18, 10:51 AM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Marion, Warren	39 min
Sep 18, 11:23 AM CDT	Severe Thunderstorm Warning	OAX	Mills, Pottawattamie	26 min
Sep 18, 3:37 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	23 min
Sep 18, 3:39 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Keokuk, Washington	41 min
Sep 22, 12:12 PM CDT	Severe Thunderstorm Warning	OAX	Monona	48 min
Sep 22, 12:54 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	36 min
Sep 22, 1:07 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	38 min
Sep 22, 1:39 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	27 min
Sep 22, 3:20 PM CDT	Severe Thunderstorm Warning	OAX	Shelby	25 min
Sep 22, 3:24 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Cass	36 min
Sep 23, 4:46 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie	29 min
Nov 11, 12:16 PM CST	Severe Thunderstorm Warning	FSD	Plymouth, Woodbury	17 min
Nov 11, 12:41 PM CST	Severe Thunderstorm Warning	FSD	Buena Vista, Clay	13 min
Nov 11, 1:07 PM CST	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Sac	23 min
Nov 11, 1:43 PM CST	Severe Thunderstorm Warning	OAX	Montgomery, Pottawattamie	20 min
Nov 11, 1:48 PM CST	Severe Thunderstorm Warning	DMX	Cass	30 min
Nov 11, 1:51 PM CST	Severe Thunderstorm Warning	DMX	Calhoun, Pocahontas	39 min
Nov 11, 2:01 PM CST	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass	44 min
Nov 11, 2:08 PM CST	Severe Thunderstorm Warning	OAX	Shelby	20 min
Nov 11, 2:10 PM CST	Severe Thunderstorm Warning	DMX	Ringgold, Taylor, Union	35 min
Nov 11, 2:12 PM CST	Severe Thunderstorm Warning	DMX	Adair, Audubon, Cass, Guthrie	48 min
Nov 11, 2:23 PM CST	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Ringgold, Union	37 min
Nov 11, 2:28 PM CST	Severe Thunderstorm Warning	DMX	Carroll, Crawford	47 min
Nov 11, 2:30 PM CST	Severe Thunderstorm Warning	DMX	Adair, Adams, Clarke, Madison, Union, Warren	45 min
Nov 11, 2:39 PM CST	Severe Thunderstorm Warning	DMX	Decatur, Wayne	36 min
Nov 11, 2:46 PM CST	Severe Thunderstorm Warning	DMX	Boone, Dallas, Greene, Guthrie, Madison	44 min
Nov 11, 2:54 PM CST	Severe Thunderstorm Warning	DMX	Calhoun, Sac, Webster	51 min
Nov 11, 2:55 PM CST	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Warren, Wayne	50 min
Nov 11, 3:07 PM CST	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk, Story, Warren	53 min
Nov 11, 3:27 PM CST	Severe Thunderstorm Warning	DMX	Jasper, Marion	48 min
Nov 11, 3:31 PM CST	Severe Thunderstorm Warning	DMX	Appanoose	34 min
Nov 11, 3:47 PM CST	Severe Thunderstorm Warning	DMX	Mahaska, Monroe, Wapello	43 min
Nov 11, 3:52 PM CST	Severe Thunderstorm Warning	DMX	Hamilton, Hardin, Jasper, Marshall, Polk, Story and 1 more	53 min
Nov 11, 3:52 PM CST	Severe Thunderstorm Warning	DMX	Davis, Wapello	38 min
Nov 11, 3:55 PM CST	Severe Thunderstorm Warning	DVN	Jefferson, Keokuk, Van Buren, Washington	65 min
Nov 11, 4:03 PM CST	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Marshall, Poweshiek, Tama	57 min
Nov 11, 4:16 PM CST	Severe Thunderstorm Warning	DVN	Benton, Iowa	59 min
Nov 11, 4:39 PM CST	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Tama	51 min
Nov 11, 4:44 PM CST	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Johnson, Linn, Louisa, Washington	61 min
Nov 11, 4:52 PM CST	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Jefferson, Lee, Van Buren	53 min
Nov 11, 5:20 PM CST	Severe Thunderstorm Warning	DVN	Cedar, Clinton, Jones, Louisa, Muscatine, Scott	55 min
Nov 11, 5:28 PM CST	Severe Thunderstorm Warning	DVN	Des Moines, Lee, Louisa	62 min
Nov 11, 5:55 PM CST	Severe Thunderstorm Warning	DVN	Delaware, Dubuque, Jackson, Jones	49 min
Nov 11, 6:30 PM CST	Severe Thunderstorm Warning	ARX	Clayton	45 min
Dec 23, 2:53 PM CST	Severe Thunderstorm Warning	DVN	Lee	52 min
Dec 23, 3:25 PM CST	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Washington	35 min
Dec 23, 3:35 PM CST	Severe Thunderstorm Warning	DVN	Des Moines, Lee	40 min

By county

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

57 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 2014 2016

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.