Alert archive / Iowa / Mesoscale Discussions in 2018
Mesoscale Discussion 685
The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2018, 3:52 PM CDT for 29 counties in Iowa; 11 counties in Minnesota; Grant County, Wisconsin. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2018, 3:52 PM CDT (20:52 UTC)
- Expired
- Jun 9, 2018, 5:15 PM CDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 41 counties
Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Jones County, IA, Kossuth County, IA, Linn County, IA, Marshall County, IA, Mitchell County, IA, Tama County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Blue Earth County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Steele County, MN, Waseca County, MN, Winona County, MN, Grant County, WI
The radar
The La Crosse radar (KARX), 152 km from the middle of the area, began a volume at 20:52 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
Minneapolis, MN (KMPX), launched 12:00Z, 8.9 hours before the alert went out and 186 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
- 395 J/kg
- Mixed-layer CIN
- -155 J/kg
- Mixed-layer LCL
- 661 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
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 |
|---|---|---|---|---|
| Jun 8, 11:51 PM CDT | Mesoscale Discussion | SPC | Plymouth | 84 min |
| Jun 9, 2:51 AM CDT | Mesoscale Discussion | SPC | Audubon, Carroll, Cass, Crawford, Fremont, Greene and 10 more | 114 min |
| Jun 9, 1:46 PM CDT | Mesoscale Discussion | SPC | Bremer, Butler, Cerro Gordo, Chickasaw, Floyd, Franklin and 6 more | 119 min |
| Jun 9, 2:26 PM CDT | Tornado Watch | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 18 more | 5 hr |
| Jun 9, 6:30 PM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 22 more | 2 hr |
Nearby
Mesoscale Discussions in Iowa, 2018Mesoscale Discussions in Minnesota, 2018Mesoscale Discussions in Wisconsin, 2018Every mesoscale discussion in 2018
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.