Weather alerts in Iowa, May 2009

Weather alerts by county

Each county as a circle sized by its count in May 2009. Tap one for its archive.

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.

Issued	Product	Office	Counties	Lasted
May 2, 6:11 AM CDT	River Flood Warning	DVN	Louisa	28 hr
May 6, 8:27 AM CDT	Severe Thunderstorm Warning	OAX	Shelby	33 min
May 6, 9:34 AM CDT	Severe Thunderstorm Warning	FSD	Dickinson	26 min
May 6, 1:55 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Crawford, Dickinson, Ida and 8 more	65 min
May 6, 2:33 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	27 min
May 6, 2:34 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Woodbury	41 min
May 6, 3:05 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	40 min
May 6, 3:07 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	23 min
May 6, 3:08 PM CDT	Severe Thunderstorm Warning	DMX	Sac	52 min
May 6, 3:29 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	61 min
May 6, 3:30 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	15 min
May 6, 3:52 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie	38 min
May 6, 4:28 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Montgomery, Pottawattamie	47 min
May 6, 5:01 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Montgomery, Page	44 min
May 6, 5:14 PM CDT	Tornado Warning	OAX	Montgomery, Page	35 min
May 6, 5:15 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Dickinson, Osceola	45 min
May 6, 5:23 PM CDT	Tornado Warning	FSD	Clay, Dickinson, O'Brien, Osceola	52 min
May 6, 5:54 PM CDT	Tornado Warning	FSD	Clay, O'Brien	35 min
May 6, 6:23 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Clay	19 min
May 7, 1:12 PM CDT	Mesoscale Discussion	SPC	Decatur, Fremont, Mills, Montgomery, Page, Ringgold and 1 more	93 min
May 7, 1:44 PM CDT	Tornado Watch	SPC	Adams, Appanoose, Clarke, Decatur, Fremont, Mills and 7 more	6 hr
May 7, 3:55 PM CDT	Mesoscale Discussion	SPC	Appanoose, Decatur, Fremont, Montgomery, Page, Ringgold and 2 more	65 min
May 7, 4:10 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Wayne	50 min
May 7, 5:29 PM CDT	Special Weather Statement	DVN	Lee, Van Buren	91 min
May 7, 5:42 PM CDT	Mesoscale Discussion	SPC	Adams, Appanoose, Clarke, Davis, Decatur, Fremont and 8 more	2 hr
May 7, 5:56 PM CDT	Mesoscale Discussion	SPC	Lee	64 min
May 8, 1:05 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 54 more	85 min
May 8, 1:21 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 44 more	6 hr
May 8, 4:58 PM CDT	Special Weather Statement	DVN	Benton, Iowa, Johnson	77 min
May 8, 5:15 PM CDT	Severe Thunderstorm Warning	DMX	Marshall, Tama	45 min
May 8, 5:23 PM CDT	Special Weather Statement	DVN	Benton, Iowa, Johnson, Linn	52 min
May 8, 5:27 PM CDT	Severe Thunderstorm Warning	DMX	Marshall, Poweshiek, Tama	32 min
May 8, 5:47 PM CDT	Mesoscale Discussion	SPC	Appanoose, Benton, Black Hawk, Buchanan, Cedar, Clayton and 29 more	58 min
May 8, 5:57 PM CDT	Severe Thunderstorm Warning	DVN	Iowa, Johnson, Linn	63 min
May 8, 6:10 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Cedar, Clayton, Clinton, Delaware, Des Moines and 15 more	4 hr
May 8, 6:18 PM CDT	Severe Thunderstorm Warning	DVN	Keokuk, Washington	57 min
May 8, 6:26 PM CDT	Severe Thunderstorm Warning	DMX	Monroe	22 min
May 8, 6:46 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	29 min
May 8, 7:07 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Louisa, Washington	41 min
May 8, 7:40 PM CDT	Severe Thunderstorm Warning	DVN	Louisa, Muscatine	49 min
May 8, 7:57 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Louisa	63 min
May 8, 8:07 PM CDT	Tornado Warning	DVN	Louisa	38 min
May 8, 8:35 PM CDT	Mesoscale Discussion	SPC	Des Moines	85 min
May 12, 3:34 AM CDT	Wind Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, O'Brien, Osceola	17 hr
May 12, 1:22 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Cass, Decatur, Fremont and 10 more	53 min
May 12, 3:49 PM CDT	Wind Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	30 hr
May 12, 8:42 PM CDT	Mesoscale Discussion	SPC	Lyon	93 min
May 13, 1:52 PM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Lee, Monroe, Van Buren, Wayne	23 min
May 13, 2:39 PM CDT	Tornado Watch	SPC	Appanoose, Clarke, Davis, Decatur, Des Moines, Henry and 15 more	7 hr
May 13, 4:07 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marion, Polk, Warren	38 min
May 13, 5:08 PM CDT	Special Weather Statement	DVN	Iowa	52 min
May 13, 5:47 PM CDT	Mesoscale Discussion	SPC	Appanoose, Cedar, Clinton, Davis, Des Moines, Henry and 16 more	88 min
May 13, 6:19 PM CDT	Special Weather Statement	DVN	Cedar, Iowa, Johnson, Jones, Keokuk, Linn and 3 more	86 min
May 13, 6:53 PM CDT	Special Weather Statement	DVN	Cedar, Clinton, Jackson, Louisa, Muscatine, Scott	52 min
May 13, 7:05 PM CDT	Mesoscale Discussion	SPC	Cedar, Clinton, Des Moines, Henry, Jefferson, Keokuk and 6 more	85 min
May 13, 7:51 PM CDT	Special Weather Statement	DVN	Des Moines, Scott	54 min
May 13, 8:07 PM CDT	River Flood Warning	DVN	Iowa, Johnson	3 days
May 13, 8:35 PM CDT	Mesoscale Discussion	SPC	Lee	85 min
May 13, 9:06 PM CDT	Flash Flood Warning	DVN	Clinton, Jackson	5 hr
May 14, 3:19 PM CDT	Flash Flood Watch	DVN	Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 12 more	31 hr
May 14, 4:00 PM CDT	Flash Flood Watch	DMX	Adams, Appanoose, Clarke, Davis, Decatur, Jasper and 11 more	26 hr
May 15, 2:03 AM CDT	Mesoscale Discussion	SPC	Fremont, Page, Ringgold, Taylor	87 min
May 15, 7:14 AM CDT	Mesoscale Discussion	SPC	Adams, Fremont, Mills, Montgomery, Page, Ringgold and 1 more	91 min
May 15, 7:42 AM CDT	Severe Thunderstorm Watch	SPC	Fremont, Mills, Montgomery, Page	5 hr
May 15, 9:40 AM CDT	Flash Flood Warning	DVN	Des Moines, Lee	6 hr
May 15, 9:52 AM CDT	Flash Flood Warning	DVN	Des Moines, Henry, Jefferson, Lee, Van Buren	6 hr
May 15, 9:58 AM CDT	River Flood Warning	DMX	Lucas, Wayne	40 hr
May 15, 9:58 AM CDT	River Flood Warning	DMX	Appanoose, Wayne	28 hr
May 15, 10:06 AM CDT	Flash Flood Warning	DMX	Adams, Clarke, Decatur, Ringgold, Taylor, Union	6 hr
May 15, 10:10 AM CDT	River Flood Warning	DVN	Clinton, Scott	11 hr
May 15, 10:10 AM CDT	River Flood Warning	DVN	Cedar, Louisa, Muscatine	11 hr
May 15, 10:10 AM CDT	River Flood Warning	DVN	Johnson, Louisa, Washington	11 hr
May 15, 10:10 AM CDT	River Flood Warning	DVN	Louisa	28 hr
May 15, 10:10 AM CDT	River Flood Warning	DVN	Louisa	52 hr
May 15, 10:10 AM CDT	River Flood Warning	DVN	Johnson, Washington	48 hr
May 15, 10:10 AM CDT	River Flood Warning	DVN	Keokuk	43 hr
May 15, 10:10 AM CDT	River Flood Warning	DVN	Des Moines, Henry, Lee	4 days
May 15, 10:10 AM CDT	River Flood Warning	DVN	Lee	43 hr
May 15, 10:58 AM CDT	River Flood Warning	DMX	Taylor	8 hr
May 15, 11:18 AM CDT	Special Weather Statement	DVN	Lee	57 min
May 15, 11:48 AM CDT	Mesoscale Discussion	SPC	Fremont, Page	57 min
May 15, 1:17 PM CDT	Mesoscale Discussion	SPC	Lyon, Osceola	58 min
May 15, 1:33 PM CDT	River Flood Warning	DMX	Wapello	19 hr
May 15, 2:20 PM CDT	River Flood Warning	DMX	Decatur	5 hr
May 15, 3:32 PM CDT	Areal Flood Warning	DVN	Des Moines, Henry, Jefferson, Lee, Van Buren	16 hr
May 15, 3:44 PM CDT	Areal Flood Warning	DMX	Adams, Clarke, Decatur, Ringgold, Taylor, Union	12 hr
May 15, 3:57 PM CDT	River Flood Warning	DVN	Des Moines, Lee	66 hr
May 15, 4:12 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie, Shelby	26 min
May 15, 8:55 PM CDT	River Flood Warning	DMX	Mahaska, Marion	23 hr
May 16, 3:41 AM CDT	Frost Advisory	DMX	Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 29 more	27 hr
May 16, 3:49 AM CDT	Frost Advisory	OAX	Harrison, Monona, Montgomery, Pottawattamie, Shelby	24 hr
May 16, 3:51 AM CDT	Frost Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 4 more	26 hr
May 16, 3:53 AM CDT	Frost Advisory	DVN	Benton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 10 more	28 hr
May 16, 4:04 AM CDT	Frost Advisory	ARX	Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more	27 hr
May 16, 10:20 AM CDT	River Flood Warning	DVN	Des Moines	11 hr
May 16, 10:20 AM CDT	River Flood Warning	DVN	Lee	11 hr
May 18, 8:41 AM CDT	River Flood Warning	DVN	Keokuk	7 hr
May 19, 3:31 AM CDT	Wind Advisory	FSD	Plymouth, Woodbury	17 hr
May 19, 3:43 AM CDT	Wind Advisory	OAX	Monona	16 hr
May 19, 3:18 PM CDT	Wind Advisory	FSD	Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more	28 hr
May 19, 3:38 PM CDT	Wind Advisory	ARX	Chickasaw, Floyd, Howard, Mitchell	27 hr
May 19, 3:42 PM CDT	Wind Advisory	DMX	Audubon, Butler, Calhoun, Carroll, Cerro Gordo, Crawford and 16 more	27 hr
May 20, 3:44 AM CDT	Wind Advisory	OAX	Harrison, Mills, Monona, Pottawattamie, Shelby	16 hr
May 26, 5:23 PM CDT	Areal Flood Advisory	DMX	Story	6 hr
May 27, 9:07 AM CDT	River Flood Warning	DMX	Polk, Story	7 hr
May 27, 9:07 AM CDT	River Flood Warning	DMX	Jasper, Marion, Polk	7 hr
May 27, 9:07 AM CDT	River Flood Warning	DMX	Mahaska, Marion	4 days
May 27, 10:16 AM CDT	River Flood Warning	DMX	Black Hawk	34 hr
May 27, 10:16 AM CDT	River Flood Warning	DMX	Black Hawk, Bremer, Butler	6 days
May 27, 10:16 AM CDT	River Flood Warning	DMX	Black Hawk, Butler	59 hr
May 27, 8:41 PM CDT	River Flood Warning	DVN	Iowa, Johnson	7 days
May 31, 6:53 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills	52 min

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	27
Tornado Warning	4
Severe Thunderstorm Watch	3
Tornado Watch	2
Mesoscale Discussion	18
Special Weather Statement	8
Flooding
Areal Flood Warning	2
Flash Flood Warning	4
River Flood Warning	28
Flash Flood Watch	2
Areal Flood Advisory	1
Cold
Frost Advisory	5
Wind and dust
Wind Advisory	8

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 now Tornadoes on record The radar archive 2008 2010

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.