Alert archive / Iowa / Mesoscale Discussions in 2025
Mesoscale Discussion 1920
The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2025, 1:44 AM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2025, 1:44 AM CDT (06:44 UTC)
- Expired
- Aug 10, 2025, 3:45 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...severe thunderstorm watch likely
- Chance of a watch
- 95%
All 41 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Boone County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Decatur County, IA, Fremont County, IA, Guthrie County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Ringgold County, IA, Story County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Brown County, KS, Doniphan County, KS, Andrew County, MO, Atchison County, MO, DeKalb County, MO, Gentry County, MO, Harrison County, MO, Holt County, MO, Mercer County, MO, Nodaway County, MO, Worth County, MO, Richardson County, NE
The radar
The Des Moines radar (KDMX), 77 km from the middle of the area, began a volume at 06:45 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
Davenport, (KDVN), launched 00:00Z, 6.7 hours before the alert went out and 300 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
- 2514 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1171 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 236 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 |
|---|---|---|---|---|
| Aug 9, 8:46 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie | 8 hr |
| Aug 10, 2:51 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Butler and 29 more | 4 hr |
| Aug 10, 4:59 AM CDT | Mesoscale Discussion | SPC | Adair, Black Hawk, Boone, Butler, Cass, Dallas and 12 more | 91 min |
| Aug 9, 7:35 PM CDT | Mesoscale Discussion | SPC | Clay, Cloud, Decatur, Dickinson, Ellis, Ellsworth and 25 more | 115 min |
| Aug 9, 9:53 PM CDT | Mesoscale Discussion | SPC | Decatur, Graham, Jewell, Mitchell, Norton, Osborne and 6 more | 2 hr |
| Aug 10, 12:39 AM CDT | Mesoscale Discussion | SPC | Clay, Cloud, Jewell, Marshall, Mitchell, Nemaha and 5 more | 96 min |
| Aug 10, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne | 10 hr |
| Aug 10, 5:09 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chautauqua, Cherokee and 14 more | 2 hr |
| Aug 10, 6:42 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Clark, Decatur, Finney, Ford, Gove and 22 more | 93 min |
Nearby
Mesoscale Discussions in Iowa, 2025Mesoscale Discussions in Missouri, 2025Mesoscale Discussions in Kansas, 2025Every mesoscale discussion in 2025
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.