Alert archive / Iowa / Mesoscale Discussions in 2017
Mesoscale Discussion 716
The Storm Prediction Center issued this mesoscale discussion at May 15, 2017, 9:15 AM CDT for 13 counties in Iowa; Jackson County, Nobles County, Rock County, Minnesota; 5 counties in South Dakota. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- May 15, 2017, 9:15 AM CDT (14:15 UTC)
- Expired
- May 15, 2017, 10:45 AM CDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 21 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Sioux County, IA, Jackson County, MN, Nobles County, MN, Rock County, MN, Hutchinson County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Turner County, SD
The radar
The Sioux Falls radar (KFSD), 47 km from the middle of the area, began a volume at 14:15 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 12:00Z, 2.3 hours before the alert went out and 224 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
- 527 J/kg
- Mixed-layer CIN
- -402 J/kg
- Mixed-layer LCL
- 1854 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 15, 3:48 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Butler, Calhoun, Carroll, Cerro Gordo, Chickasaw and 16 more | 87 min |
| May 15, 5:11 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Calhoun and 24 more | 9 hr |
| May 15, 4:07 PM CDT | Mesoscale Discussion | SPC | Butte, Custer, Fall River, Lawrence, Oglala Lakota, Pennington | 113 min |
| May 15, 5:40 PM CDT | Severe Thunderstorm Watch | SPC | Butte, Custer, Fall River, Harding, Lawrence, Meade and 3 more | 7 hr |
Nearby
Mesoscale Discussions in Iowa, 2017Mesoscale Discussions in South Dakota, 2017Mesoscale Discussions in Minnesota, 2017Every mesoscale discussion in 2017
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.