Alert archive / Iowa / Mesoscale Discussions in 2006
Mesoscale Discussion 1978
The Storm Prediction Center issued this mesoscale discussion at Sep 16, 2006, 8:15 PM CDT for 35 counties in Iowa. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 16, 2006, 8:15 PM CDT (01:15 UTC)
- Expired
- Sep 16, 2006, 10:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 35 counties
Adair County, IA, Adams County, IA, Audubon County, IA, Boone County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cherokee County, IA, Clarke County, IA, Clay County, IA, Crawford County, IA, Dallas County, IA, Decatur County, IA, Dickinson County, IA, Greene County, IA, Guthrie County, IA, Ida County, IA, Madison County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Polk County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Taylor County, IA, Union County, IA, Warren County, IA, Webster County, IA, Woodbury County, IA
The radar
The Des Moines radar (KDMX), 115 km from the middle of the area, began a volume at 01:16 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 00:00Z, 1.3 hours before the alert went out and 155 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
- 1906 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 2012 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 262 m²/s²
- 0-3 km storm-relative helicity
- 307 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 16.8
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 |
|---|---|---|---|---|
| Sep 16, 8:34 PM CDT | Tornado Watch | SPC | Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 29 more | 7 hr |
| Sep 16, 11:44 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Allamakee, Appanoose, Benton, Black Hawk and 45 more | 2 hr |
Nearby
Mesoscale Discussions in Iowa, 2006Every mesoscale discussion in 2006
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.