Alert archive / Iowa / Mesoscale Discussions / 2018

Mesoscale Discussions in Iowa, September 2018

23 mesoscale discussions in September 2018. 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 September 2018. Tap one for its archive.

Mesoscale Discussions
23
Busiest day
September 18, 20184 mesoscale discussions

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
Aug 31, 8:47 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Carroll, Cass and 24 more118 min
Sep 1, 6:34 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Benton, Black Hawk and 67 more56 min
Sep 1, 10:27 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Benton, Boone and 47 more63 min
Sep 2, 2:24 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Benton, Black Hawk, Boone and 45 more2 hr
Sep 3, 1:20 PM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Henry, Iowa, Jackson and 9 more2 hr
Sep 3, 5:47 PM CDTMesoscale DiscussionSPCAdair, Adams, Benton, Black Hawk, Boone, Bremer and 39 more58 min
Sep 4, 2:06 PM CDTMesoscale DiscussionSPCAudubon, Boone, Buena Vista, Calhoun, Carroll, Cerro Gordo and 22 more2 hr
Sep 4, 6:28 PM CDTMesoscale DiscussionSPCAllamakee, Boone, Bremer, Butler, Cerro Gordo, Chickasaw and 16 more2 hr
Sep 4, 9:07 PM CDTMesoscale DiscussionSPCAllamakee, Fayette, Winneshiek83 min
Sep 17, 3:05 PM CDTMesoscale DiscussionSPCCerro Gordo, Chickasaw, Floyd, Hancock, Howard, Mitchell and 3 more115 min
Sep 18, 2:48 AM CDTMesoscale DiscussionSPCLyon2 hr
Sep 18, 5:48 AM CDTMesoscale DiscussionSPCDickinson, Emmet, Lyon, Osceola2 hr
Sep 18, 3:06 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Clarke, Decatur and 13 more84 min
Sep 18, 5:11 PM CDTMesoscale DiscussionSPCFremont, Mills, Montgomery, Page, Ringgold, Taylor64 min
Sep 19, 2:40 AM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 16 more3 hr
Sep 20, 2:15 PM CDTMesoscale DiscussionSPCBuena Vista, Cerro Gordo, Cherokee, Clay, Dickinson, Emmet and 12 more3 hr
Sep 20, 2:31 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 23 more119 min
Sep 20, 5:29 PM CDTMesoscale DiscussionSPCAllamakee2 hr
Sep 20, 5:48 PM CDTMesoscale DiscussionSPCAudubon, Boone, Bremer, Buena Vista, Butler, Calhoun and 37 more57 min
Sep 20, 8:20 PM CDTMesoscale DiscussionSPCAllamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more115 min
Sep 25, 9:27 AM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Carroll, Cass and 24 more2 hr
Sep 25, 1:07 PM CDTMesoscale DiscussionSPCAppanoose, Benton, Buchanan, Cedar, Clayton, Clinton and 23 more113 min
Sep 25, 3:39 PM CDTMesoscale DiscussionSPCCedar, Clinton, Des Moines, Dubuque, Jackson, Jones and 4 more96 min

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 nowTornadoes on recordThe radar archive20172019

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.