Alert archive / Iowa / Mesoscale Discussions in 2013

Mesoscale Discussion 733

May 20, 201320 counties in Iowa; 5 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 20, 2013, 5:38 PM CDT for 20 counties in Iowa; 5 counties in Missouri. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
May 20, 2013, 5:38 PM CDT (22:38 UTC)
Expired
May 20, 2013, 6:45 PM CDT
In force
67 min
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 25 counties

Boone County, IA, Butler County, IA, Clarke County, IA, Dallas County, IA, Decatur County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hardin County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Marshall County, IA, Polk County, IA, Ringgold County, IA, Story County, IA, Tama County, IA, Union County, IA, Warren County, IA, Andrew County, MO, DeKalb County, MO, Gentry County, MO, Harrison County, MO, Worth County, MO

The radar

The Des Moines radar (KDMX), 59 km from the middle of the area, began a volume at 22:38 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 19, 7:13 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Benton, Boone and 49 more62 min
May 19, 7:46 PM CDTMesoscale DiscussionSPCCedar, Clayton, Clinton, Delaware, Dubuque, Jackson and 4 more59 min
May 19, 8:10 PM CDTTornado WatchSPCAllamakee, Benton, Buchanan, Cedar, Chickasaw, Clayton and 23 more6 hr
May 19, 8:21 PM CDTMesoscale DiscussionSPCButler, Cerro Gordo, Emmet, Franklin, Grundy, Hamilton and 9 more54 min
May 19, 9:11 PM CDTMesoscale DiscussionSPCAppanoose, Davis, Decatur, Jasper, Lucas, Mahaska and 7 more64 min
May 19, 10:58 PM CDTMesoscale DiscussionSPCAllamakee, Cedar, Clayton, Clinton, Delaware, Des Moines and 11 more62 min
May 20, 6:35 PM CDTSevere Thunderstorm WatchSPCAppanoose, Benton, Black Hawk, Boone, Bremer, Butler and 33 more5 hr
May 19, 7:55 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Clay, Clinton, DeKalb and 4 more65 min
May 19, 10:16 PM CDTMesoscale DiscussionSPCAdair, Audrain, Barry, Barton, Bates, Benton and 52 more59 min
May 19, 11:49 PM CDTMesoscale DiscussionSPCBarry, Barton, Camden, Cedar, Christian, Dade and 17 more56 min
May 20, 8:46 AM CDTMesoscale DiscussionSPCBates, Benton, Cass, Henry, Jackson, Johnson and 4 more59 min
May 20, 12:26 PM CDTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Camden, Cedar and 20 more2 hr
May 20, 12:46 PM CDTTornado WatchSPCBarry, Barton, Bates, Benton, Boone, Callaway and 41 more8 hr
May 20, 3:27 PM CDTMesoscale DiscussionSPCAudrain, Lincoln, Marion, Monroe, Montgomery, Pike and 2 more63 min
May 20, 5:07 PM CDTMesoscale DiscussionSPCAudrain, Crawford, Franklin, Gasconade, Lincoln, Marion and 8 more23 min
May 20, 5:24 PM CDTTornado WatchSPCAudrain, Boone, Callaway, Clark, Cole, Crawford and 20 more7 hr
May 20, 6:53 PM CDTMesoscale DiscussionSPCCarter, Dent, Douglas, Howell, Iron, Madison and 8 more67 min

Nearby

Mesoscale Discussions in Iowa, 2013Mesoscale Discussions in Missouri, 2013Every mesoscale discussion in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.