Alert archive / Iowa / 2011

Weather alerts in Iowa, September 2011

68 weather alerts in September 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

Each county as a circle sized by its count in September 2011. Tap one for its archive.

Alerts
68
Warnings
29
Watches
5
Advisories
22
Busiest day
September 3, 201127 alerts

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.

IssuedProductOfficeCountiesLasted
Sep 1, 10:40 AM CDTHeat AdvisoryDVNCedar, Des Moines, Henry, Iowa, Jefferson, Johnson and 7 more32 hr
Sep 2, 2:33 AM CDTSevere Thunderstorm WarningFSDPlymouth, Sioux27 min
Sep 2, 2:56 AM CDTSevere Thunderstorm WarningFSDCherokee, O'Brien, Plymouth, Sioux34 min
Sep 2, 3:09 AM CDTTornado WarningFSDCherokee, Plymouth24 min
Sep 2, 3:27 AM CDTSevere Thunderstorm WarningFSDBuena Vista, Cherokee, Clay, O'Brien33 min
Sep 2, 3:27 AM CDTMesoscale DiscussionSPCBuena Vista, Cerro Gordo, Clay, Emmet, Floyd, Hancock and 10 more93 min
Sep 2, 3:40 AM CDTSevere Thunderstorm WarningFSDClay, O'Brien35 min
Sep 2, 3:48 AM CDTSevere Thunderstorm WatchSPCAllamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 15 more6 hr
Sep 2, 3:49 AM CDTSevere Thunderstorm WarningDMXKossuth, Palo Alto41 min
Sep 2, 4:27 AM CDTSevere Thunderstorm WarningDMXHumboldt, Kossuth, Palo Alto, Pocahontas48 min
Sep 2, 5:33 AM CDTSevere Thunderstorm WarningDMXWorth27 min
Sep 2, 5:46 AM CDTSevere Thunderstorm WarningARXMitchell44 min
Sep 2, 6:15 AM CDTSevere Thunderstorm WarningARXHoward, Winneshiek60 min
Sep 2, 7:02 AM CDTSevere Thunderstorm WarningARXAllamakee, Winneshiek58 min
Sep 2, 2:41 PM CDTMesoscale DiscussionSPCAdair, Adams, Allamakee, Audubon, Benton, Black Hawk and 66 more94 min
Sep 2, 9:01 PM CDTSevere Thunderstorm WarningOAXHarrison, Pottawattamie, Shelby44 min
Sep 2, 9:30 PM CDTSevere Thunderstorm WarningDMXHamilton, Webster45 min
Sep 2, 9:40 PM CDTSevere Thunderstorm WarningDMXAudubon, Carroll, Cass, Greene, Guthrie65 min
Sep 2, 9:43 PM CDTSevere Thunderstorm WarningOAXHarrison, Pottawattamie, Shelby41 min
Sep 2, 10:04 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Benton, Black Hawk, Boone and 22 more86 min
Sep 2, 10:23 PM CDTSevere Thunderstorm WatchSPCAdair, Benton, Black Hawk, Boone, Buchanan, Cass and 26 more6 hr
Sep 2, 10:48 PM CDTSevere Thunderstorm WarningDMXBoone, Dallas, Greene, Guthrie42 min
Sep 2, 11:02 PM CDTSevere Thunderstorm WarningDMXBlack Hawk, Bremer, Butler, Grundy, Marshall, Tama46 min
Sep 2, 11:25 PM CDTSevere Thunderstorm WarningDMXBoone, Dallas, Polk, Story34 min
Sep 2, 11:45 PM CDTSevere Thunderstorm WarningDMXBlack Hawk, Bremer45 min
Sep 2, 11:50 PM CDTSevere Thunderstorm WarningDVNBuchanan, Delaware55 min
Sep 2, 11:56 PM CDTMesoscale DiscussionSPCBenton, Black Hawk, Boone, Buchanan, Cedar, Clayton and 26 more94 min
Sep 2, 11:58 PM CDTSevere Thunderstorm WarningARXClayton, Fayette62 min
Sep 3, 12:48 AM CDTSevere Thunderstorm WatchSPCClayton, Fayette6 hr
Sep 3, 12:54 AM CDTSevere Thunderstorm WarningARXAllamakee, Clayton66 min
Sep 3, 1:05 AM CDTSpecial Weather StatementDVNDelaware, Dubuque55 min
Sep 3, 1:27 AM CDTSpecial Weather StatementDVNBuchanan, Delaware63 min
Sep 3, 1:46 AM CDTFlash Flood WarningARXFayette4 hr
Sep 3, 2:13 AM CDTSevere Thunderstorm WarningARXClayton, Fayette47 min
Sep 3, 2:29 AM CDTSpecial Weather StatementDVNBenton, Buchanan, Delaware, Dubuque, Linn61 min
Sep 3, 2:53 AM CDTFlash Flood WarningARXClayton3 hr
Sep 3, 9:56 AM CDTSpecial Weather StatementDVNCedar, Clinton64 min
Sep 3, 1:45 PM CDTSpecial Weather StatementDVNCedar, Clinton, Muscatine, Scott45 min
Sep 3, 1:54 PM CDTSevere Thunderstorm WarningDVNHenry, Jefferson66 min
Sep 3, 2:20 PM CDTSpecial Weather StatementDVNScott55 min
Sep 3, 2:42 PM CDTSpecial Weather StatementDVNDes Moines48 min
Sep 3, 2:52 PM CDTSevere Thunderstorm WarningDVNDes Moines, Louisa53 min
Sep 13, 3:53 AM CDTFreeze WatchDMXCerro Gordo, Emmet, Hancock, Kossuth, Palo Alto, Winnebago and 1 more24 hr
Sep 13, 3:54 AM CDTFreeze WatchFSDClay, Dickinson, Lyon, O'Brien, Osceola11 hr
Sep 13, 3:12 PM CDTFreeze WarningFSDClay, Dickinson, Lyon, O'Brien, Osceola, Sioux41 hr
Sep 13, 3:47 PM CDTRiver Flood AdvisoryOAXPottawattamie10 days
Sep 14, 3:34 AM CDTFrost AdvisoryARXAllamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more28 hr
Sep 14, 3:48 AM CDTFrost AdvisoryDVNBenton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 5 more28 hr
Sep 14, 3:52 AM CDTFrost AdvisoryDMXAudubon, Black Hawk, Boone, Bremer, Butler, Calhoun and 20 more28 hr
Sep 14, 3:52 AM CDTFreeze WarningDMXCerro Gordo, Emmet, Hancock, Kossuth, Palo Alto, Winnebago and 1 more28 hr
Sep 14, 4:02 AM CDTFrost AdvisoryFSDBuena Vista, Cherokee, Ida, Plymouth, Woodbury28 hr
Sep 14, 4:12 AM CDTFrost AdvisoryOAXHarrison, Monona, Pottawattamie, Shelby28 hr
Sep 14, 10:33 AM CDTRiver Flood AdvisoryOAXHarrison9 days
Sep 18, 10:51 PM CDTDense Fog AdvisoryOAXFremont, Harrison, Mills, Monona, Montgomery, Page and 2 more10 hr
Sep 18, 10:54 PM CDTDense Fog AdvisoryDMXAdair, Adams, Audubon, Calhoun, Carroll, Cass and 13 more10 hr
Sep 18, 11:04 PM CDTDense Fog AdvisoryFSDBuena Vista, Cherokee, Clay, Dickinson, Ida, O'Brien and 3 more10 hr
Sep 19, 3:28 PM CDTWind AdvisoryFSDLyon, Osceola, Sioux34 hr
Sep 22, 3:40 PM CDTFrost AdvisoryOAXHarrison, Monona, Shelby16 hr
Sep 25, 5:24 PM CDTSpecial Weather StatementDVNBenton, Iowa, Johnson, Jones, Keokuk, Linn and 1 more51 min
Sep 28, 1:54 AM CDTDense Fog AdvisoryARXAllamakee, Clayton, Fayette, Winneshiek9 hr
Sep 28, 2:59 AM CDTDense Fog AdvisoryDVNBenton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 7 more8 hr
Sep 28, 3:04 PM CDTWind AdvisoryARXAllamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more32 hr
Sep 28, 3:50 PM CDTWind AdvisoryDMXBlack Hawk, Boone, Bremer, Butler, Cerro Gordo, Emmet and 22 more27 hr
Sep 28, 3:57 PM CDTWind AdvisoryDVNBenton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more27 hr
Sep 29, 3:20 AM CDTWind AdvisoryFSDBuena Vista, Clay, Dickinson, O'Brien, Osceola16 hr
Sep 30, 3:27 AM CDTFrost AdvisoryARXAllamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more30 hr
Sep 30, 3:48 AM CDTFrost AdvisoryDVNBenton, Buchanan, Cedar, Clinton, Delaware, Dubuque and 3 more28 hr
Sep 30, 3:29 PM CDTFrost AdvisoryDMXAdair, Adams, Audubon, Black Hawk, Boone, Bremer and 28 more17 hr

By product

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

By county

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

55 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive20102012

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.