Alert archive / Iowa / Mesoscale Discussions in 2020
Mesoscale Discussion 735
The Storm Prediction Center issued this mesoscale discussion at May 26, 2020, 12:29 PM CDT for 30 counties in Iowa; 13 counties in Missouri. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 26, 2020, 12:29 PM CDT (17:29 UTC)
- Expired
- May 26, 2020, 2:30 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 60%
All 43 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Boone County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Jasper County, IA, Keokuk County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Story County, IA, Tama County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Adair County, MO, Caldwell County, MO, Daviess County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Linn County, MO, Livingston County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Sullivan County, MO, Worth County, MO
The radar
The Des Moines radar (KDMX), 79 km from the middle of the area, began a volume at 17:31 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
Omaha, NE (KOAX), launched 12:00Z, 5.5 hours before the alert went out and 230 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
- 534 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 130 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 |
|---|---|---|---|---|
| May 26, 1:20 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 52 more | 7 hr |
| May 26, 3:53 PM CDT | Mesoscale Discussion | SPC | Adair, Boone, Butler, Calhoun, Cerro Gordo, Dallas and 24 more | 67 min |
| May 26, 6:02 PM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 10 more | 88 min |
| May 25, 8:21 PM CDT | Mesoscale Discussion | SPC | Barry, McDonald, Newton | 114 min |
| May 25, 8:36 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Barton, Cedar, Dade, Jasper, Lawrence and 3 more | 3 hr |
| May 25, 10:36 PM CDT | Mesoscale Discussion | SPC | Barry, Barton, Cedar, Dade, Jasper, Lawrence and 3 more | 54 min |
Nearby
Mesoscale Discussions in Iowa, 2020Mesoscale Discussions in Missouri, 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.