Alert archive / Iowa / Severe Thunderstorm Warnings / 2020

Severe Thunderstorm Warnings in Iowa, September 2020

20 severe thunderstorm warnings in September 2020. 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 September 2020. Tap one for its archive.

Severe Thunderstorm Warnings
20
Busiest day
September 6, 202018 severe thunderstorm warnings

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 6, 12:39 AM CDTSevere Thunderstorm WarningDMXBlack Hawk, Bremer36 min
Sep 6, 12:56 AM CDTSevere Thunderstorm WarningARXFayette49 min
Sep 6, 12:58 AM CDTSevere Thunderstorm WarningDVNBuchanan62 min
Sep 6, 1:32 AM CDTSevere Thunderstorm WarningDMXEmmet, Hancock, Kossuth, Winnebago43 min
Sep 6, 1:35 AM CDTSevere Thunderstorm WarningDVNBuchanan, Delaware55 min
Sep 6, 1:41 AM CDTSevere Thunderstorm WarningARXChickasaw, Howard49 min
Sep 6, 2:13 AM CDTSevere Thunderstorm WarningARXFayette, Winneshiek47 min
Sep 6, 2:14 AM CDTSevere Thunderstorm WarningDMXEmmet, Hancock, Kossuth, Winnebago46 min
Sep 6, 2:17 AM CDTSevere Thunderstorm WarningDVNDelaware, Dubuque, Jones, Linn58 min
Sep 6, 2:21 AM CDTSevere Thunderstorm WarningDMXBremer19 min
Sep 6, 2:56 AM CDTSevere Thunderstorm WarningARXClayton49 min
Sep 6, 2:57 AM CDTSevere Thunderstorm WarningDMXCerro Gordo, Hancock, Kossuth, Winnebago, Worth48 min
Sep 6, 3:14 AM CDTSevere Thunderstorm WarningDMXCerro Gordo, Hancock, Kossuth, Wright46 min
Sep 6, 3:14 AM CDTSevere Thunderstorm WarningDVNDelaware, Dubuque, Jones32 min
Sep 6, 3:40 AM CDTSevere Thunderstorm WarningDMXButler, Cerro Gordo, Franklin, Hancock, Hardin, Wright50 min
Sep 6, 3:42 AM CDTSevere Thunderstorm WarningARXFloyd48 min
Sep 6, 4:04 AM CDTSevere Thunderstorm WarningDVNClinton, Scott41 min
Sep 6, 4:28 AM CDTSevere Thunderstorm WarningDVNCedar, Delaware, Jones, Linn47 min
Sep 7, 8:17 PM CDTSevere Thunderstorm WarningDMXClarke, Decatur, Ringgold, Union21 min
Sep 8, 2:16 AM CDTSevere Thunderstorm WarningDVNDes Moines44 min

By county

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

Nearby

Alerts in force nowTornadoes on recordThe radar archive20192021

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.