Alert archive / Iowa / Mesoscale Discussions in 2020
Mesoscale Discussion 736
The Storm Prediction Center issued this mesoscale discussion at May 26, 2020, 3:53 PM CDT for 30 counties in Iowa; 6 counties in Minnesota. It was in force for 67 min.
The area
The outline as issued.
The facts
- Issued
- May 26, 2020, 3:53 PM CDT (20:53 UTC)
- Expired
- May 26, 2020, 5:00 PM CDT
- In force
- 67 min
- Issued by
- the Storm Prediction Center
- Concerning
- Tornado watch 229
All 36 counties
Adair County, IA, Boone County, IA, Butler County, IA, Calhoun County, IA, Cerro Gordo County, IA, Dallas 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, Howard County, IA, Humboldt County, IA, Jasper County, IA, Kossuth County, IA, Madison County, IA, Marion County, IA, Marshall County, IA, Mitchell County, IA, Polk County, IA, Story County, IA, Union County, IA, Warren County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Dodge County, MN, Fillmore County, MN, Freeborn County, MN, Mower County, MN, Olmsted County, MN, Steele County, MN
The radar
The Des Moines radar (KDMX), 89 km from the middle of the area, began a volume at 20:56 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, 8.9 hours before the alert went out and 258 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
- 690 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| May 26, 12:29 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Boone, Clarke, Dallas and 24 more | 2 hr |
| May 26, 1:20 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 52 more | 7 hr |
| May 26, 6:02 PM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 10 more | 88 min |
Nearby
Mesoscale Discussions in Iowa, 2020Mesoscale Discussions in Minnesota, 2020Every mesoscale discussion in 2020
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.