Alert archive / Iowa / Mesoscale Discussions in 2018
Mesoscale Discussion 1050
The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2018, 12:41 PM CDT for 22 counties in Iowa; Fillmore County, Minnesota. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Jul 13, 2018, 12:41 PM CDT (17:41 UTC)
- Expired
- Jul 13, 2018, 2:15 PM CDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 23 counties
Black Hawk County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Humboldt County, IA, Mitchell County, IA, Pocahontas County, IA, Webster County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Fillmore County, MN
The radar
The Des Moines radar (KDMX), 121 km from the middle of the area, began a volume at 17:43 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, 5.7 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
- 1061 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- 22 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 |
|---|---|---|---|---|
| Jul 12, 9:39 PM CDT | Mesoscale Discussion | SPC | Dickinson, Lyon, Osceola | 96 min |
| Jul 13, 3:54 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Buchanan, Chickasaw, Clayton, Delaware, Dubuque and 3 more | 6 hr |
| Jul 13, 6:23 PM CDT | Mesoscale Discussion | SPC | Clinton, Delaware, Dubuque, Jackson, Jones | 2 hr |
| Jul 12, 7:35 PM CDT | Mesoscale Discussion | SPC | Blue Earth, Brown, Carver, Cottonwood, Dakota, Dodge and 18 more | 85 min |
Nearby
Mesoscale Discussions in Iowa, 2018Mesoscale Discussions in Minnesota, 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.