Alert archive / Iowa / Mesoscale Discussions in 2023
Mesoscale Discussion 2188
The Storm Prediction Center issued this mesoscale discussion at Sep 23, 2023, 6:23 PM CDT for 36 counties in Iowa; Faribault County, Freeborn County, Minnesota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 23, 2023, 6:23 PM CDT (23:23 UTC)
- Expired
- Sep 23, 2023, 8:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 691
All 38 counties
Audubon County, IA, Boone County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cerro Gordo County, IA, Clay County, IA, Crawford County, IA, Dallas County, IA, Dickinson County, IA, Emmet County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Jasper County, IA, Kossuth County, IA, Marshall County, IA, Mitchell County, IA, Palo Alto County, IA, Pocahontas County, IA, Polk County, IA, Poweshiek County, IA, Sac County, IA, Story County, IA, Tama County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Faribault County, MN, Freeborn County, MN
The radar
The Des Moines radar (KDMX), 80 km from the middle of the area, began a volume at 23:28 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 11.4 hours before the alert went out and 270 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
- 75 J/kg
- Mixed-layer CIN
- -165 J/kg
- Mixed-layer LCL
- 612 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 19 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 |
|---|---|---|---|---|
| Sep 23, 9:37 AM CDT | Mesoscale Discussion | SPC | Cherokee, Crawford, Harrison, Ida, Monona, Plymouth and 4 more | 113 min |
| Sep 23, 1:09 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Boone, Buena Vista, Butler, Calhoun and 28 more | 96 min |
| Sep 23, 1:34 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Black Hawk, Boone, Bremer, Butler and 34 more | 8 hr |
| Sep 23, 2:10 PM CDT | Mesoscale Discussion | SPC | Lyon, Osceola, Sioux | 3 hr |
| Sep 23, 3:39 PM CDT | Mesoscale Discussion | SPC | Black Hawk, Boone, Bremer, Butler, Cerro Gordo, Chickasaw and 20 more | 96 min |
| Sep 23, 4:58 PM CDT | Mesoscale Discussion | SPC | Adams, Audubon, Cass, Fremont, Harrison, Mills and 5 more | 2 hr |
Nearby
Mesoscale Discussions in Iowa, 2023Mesoscale Discussions in Minnesota, 2023Every mesoscale discussion in 2023
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.