Alert archive / Iowa / Mesoscale Discussions in 2025
Mesoscale Discussion 587
The Storm Prediction Center issued this mesoscale discussion at Apr 28, 2025, 3:28 PM CDT for 4 states. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2025, 3:28 PM CDT (20:28 UTC)
- Expired
- Apr 28, 2025, 6:00 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch likely
- Chance of a watch
- 95%
All 84 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Carroll County, IA, Cass County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Decatur County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Ringgold County, IA, Shelby County, IA, Story County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Wayne County, IA, Atchison County, KS, Brown County, KS, Chase County, KS, Coffey County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Jackson County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Ray County, MO, Sullivan County, MO, Worth County, MO, Cass County, NE, Douglas County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Sarpy County, NE
The radar
The Omaha radar (KOAX), 153 km from the middle of the area, began a volume at 20:31 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
Topeka, KS (KTOP), launched 12:00Z, 8.5 hours before the alert went out and 177 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
- 1258 J/kg
- Mixed-layer CIN
- -312 J/kg
- Mixed-layer LCL
- 635 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 527 m²/s²
- 0-3 km storm-relative helicity
- 549 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
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 28, 10:41 AM CDT | Mesoscale Discussion | SPC | Cherokee, Clay, Dickinson, Lyon, O'Brien, Osceola and 3 more | 2 hr |
| Apr 28, 12:29 PM CDT | Tornado Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Emmet, Lyon and 5 more | 10 hr |
| Apr 28, 2:25 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 18 more | 2 hr |
| Apr 28, 3:27 PM CDT | Tornado Watch | SPC | Butler, Calhoun, Cerro Gordo, Chickasaw, Floyd, Franklin and 13 more | 8 hr |
| Apr 28, 4:58 PM CDT | Tornado Watch | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 16 more | 7 hr |
| Apr 28, 5:29 PM CDT | Mesoscale Discussion | SPC | Monona, Plymouth, Sioux, Woodbury | 91 min |
| Apr 28, 5:59 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 4 hr |
| Apr 28, 6:06 PM CDT | Mesoscale Discussion | SPC | Howard, Mitchell, Winnebago, Worth | 84 min |
| Apr 27, 8:47 PM CDT | Mesoscale Discussion | SPC | Cherry | 58 min |
| Apr 27, 11:33 PM CDT | Mesoscale Discussion | SPC | Boyd, Cherry, Keya Paha | 87 min |
| Apr 28, 12:58 AM CDT | Mesoscale Discussion | SPC | Boyd, Brown, Holt, Keya Paha, Knox, Rock | 92 min |
Nearby
Mesoscale Discussions in Iowa, 2025Mesoscale Discussions in Kansas, 2025Mesoscale Discussions in Missouri, 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.