Alert archive / Iowa / Mesoscale Discussions in 2018
Mesoscale Discussion 730
The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2018, 11:56 PM CDT for 19 counties in Iowa; Nobles County, Pipestone County, Rock County, Minnesota; 10 counties in South Dakota. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 13, 2018, 11:56 PM CDT (04:56 UTC)
- Expired
- Jun 14, 2018, 2:30 AM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 32 counties
Audubon County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Greene County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Woodbury County, IA, Nobles County, MN, Pipestone County, MN, Rock County, MN, Clay County, SD, Hanson County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD
The radar
The Sioux Falls radar (KFSD), 74 km from the middle of the area, began a volume at 04:58 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
Omaha, NE (KOAX), launched 00:00Z, 4.9 hours before the alert went out and 185 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
- 2156 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 196 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 |
|---|---|---|---|---|
| Jun 14, 1:17 PM CDT | Mesoscale Discussion | SPC | Des Moines, Lee | 118 min |
| Jun 14, 2:58 PM CDT | Mesoscale Discussion | SPC | Bennett, Butte, Corson, Custer, Haakon, Harding and 6 more | 62 min |
| Jun 14, 3:40 PM CDT | Severe Thunderstorm Watch | SPC | Butte, Campbell, Corson, Dewey, Haakon, Harding and 10 more | 8 hr |
| Jun 14, 6:15 PM CDT | Mesoscale Discussion | SPC | Butte, Campbell, Corson, Dewey, Haakon, Harding and 9 more | 90 min |
Nearby
Mesoscale Discussions in Iowa, 2018Mesoscale Discussions in South Dakota, 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.