Alert archive / Iowa / Mesoscale Discussions in 2008
Mesoscale Discussion 759
The Storm Prediction Center issued this mesoscale discussion at May 1, 2008, 6:33 PM CDT for 16 counties in Iowa; Jackson County, Nobles County, Rock County, Minnesota; 13 counties in South Dakota. It was in force for 57 min.
The area
The outline as issued.
The facts
- Issued
- May 1, 2008, 6:33 PM CDT (23:33 UTC)
- Expired
- May 1, 2008, 7:30 PM CDT
- In force
- 57 min
- Issued by
- the Storm Prediction Center
All 32 counties
Buena Vista County, IA, Calhoun County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Humboldt County, IA, Ida 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, Clay County, SD, Davison County, SD, Douglas County, SD, Hanson County, SD, Hutchinson County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Sanborn County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 24 km from the middle of the area, began a volume at 23:34 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
Aberdeen, SD (KABR), launched 12:00Z, 11.6 hours before the alert went out and 215 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
- 894 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 3:28 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Crawford, Harrison, Ida, Lyon and 5 more | 92 min |
| May 1, 4:34 PM CDT | Tornado Watch | SPC | Buena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 9 more | 5 hr |
| May 1, 5:36 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 24 more | 7 hr |
Nearby
Mesoscale Discussions in Iowa, 2008Mesoscale Discussions in South Dakota, 2008Mesoscale Discussions in Minnesota, 2008Every mesoscale discussion in 2008
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.