Alert archive / Nebraska / Mesoscale Discussions in 2008
Mesoscale Discussion 756
The Storm Prediction Center issued this mesoscale discussion at May 1, 2008, 3:28 PM CDT for 11 counties in Iowa; 13 counties in Nebraska; 7 counties in South Dakota. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- May 1, 2008, 3:28 PM CDT (20:28 UTC)
- Expired
- May 1, 2008, 5:00 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 31 counties
Buena Vista County, IA, Cherokee County, IA, Crawford County, IA, Harrison County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Burt County, NE, Cedar County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Bon Homme County, SD, Clay County, SD, Hutchinson County, SD, Lincoln County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 111 km from the middle of the area, began a volume at 20:25 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
Omaha, NE (KOAX), launched 12:00Z, 8.5 hours before the alert went out and 148 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
- 468 J/kg
- Mixed-layer CIN
- -587 J/kg
- Mixed-layer LCL
- 694 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 390 m²/s²
- 0-3 km storm-relative helicity
- 460 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, 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 |
| May 1, 6:33 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 10 more | 57 min |
Nearby
Mesoscale Discussions in Nebraska, 2008Mesoscale Discussions in Iowa, 2008Mesoscale Discussions in South Dakota, 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.