Alert archive / Iowa / Mesoscale Discussions in 2026
Mesoscale Discussion 445
The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2026, 10:22 AM CDT for 59 counties in Iowa; 9 counties in Nebraska. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 15, 2026, 10:22 AM CDT (15:22 UTC)
- Expired
- Apr 15, 2026, 12:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 40%
All 68 counties
Adair County, IA, Adams County, IA, Audubon County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cedar County, IA, Chickasaw County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Delaware County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Iowa County, IA, Jasper County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mills County, IA, Monona County, IA, Monroe County, IA, Montgomery County, IA, Pocahontas County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Union County, IA, Warren County, IA, Washington County, IA, Webster County, IA, Woodbury County, IA, Wright County, IA, Burt County, NE, Cass County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Sarpy County, NE, Saunders County, NE, Thurston County, NE, Washington County, NE
The radar
The Des Moines radar (KDMX), 32 km from the middle of the area, began a volume at 15:25 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 3.4 hours before the alert went out and 334 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 937 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 7:28 PM CDT | Mesoscale Discussion | SPC | Adams, Appanoose, Clarke, Davis, Decatur, Fremont and 12 more | 2 hr |
| Apr 14, 9:56 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Clarke, Davis, Decatur and 16 more | 4 hr |
| Apr 14, 11:36 PM CDT | Mesoscale Discussion | SPC | Adams, Cedar, Clarke, Clinton, Fremont, Iowa and 14 more | 84 min |
| Apr 14, 11:38 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Cedar, Clinton, Iowa, Jackson, Jefferson and 8 more | 4 hr |
| Apr 15, 1:47 AM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Des Moines, Henry, Jefferson, Keokuk and 11 more | 88 min |
| Apr 15, 12:28 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Black Hawk, Boone, Bremer, Butler, Calhoun and 24 more | 7 hr |
| Apr 15, 1:50 PM CDT | Mesoscale Discussion | SPC | Boone, Dallas, Grundy, Hamilton, Hardin, Jasper and 4 more | 85 min |
| Apr 15, 2:14 PM CDT | Mesoscale Discussion | SPC | Appanoose, Clarke, Davis, Decatur, Lucas, Monroe and 4 more | 2 hr |
| Apr 15, 3:40 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Benton, Buchanan, Cedar and 37 more | 6 hr |
| Apr 15, 4:49 PM CDT | Mesoscale Discussion | SPC | Dubuque | 86 min |
| Apr 15, 6:15 PM CDT | Mesoscale Discussion | SPC | Appanoose, Benton, Cedar, Clinton, Davis, Delaware and 24 more | 2 hr |
Nearby
Mesoscale Discussions in Iowa, 2026Mesoscale Discussions in Nebraska, 2026Every mesoscale discussion in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.