Alert archive / Iowa / Mesoscale Discussions in 2007
Mesoscale Discussion 1741
The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2007, 2:59 AM CDT for 29 counties in Iowa; 6 counties in Missouri. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Aug 13, 2007, 2:59 AM CDT (07:59 UTC)
- Expired
- Aug 13, 2007, 4:00 AM CDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
All 35 counties
Adair County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Calhoun County, IA, Carroll County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Greene County, IA, Guthrie County, IA, Hamilton County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Pocahontas County, IA, Polk County, IA, Ringgold County, IA, Sac County, IA, Story County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Webster County, IA, Adair County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO
The radar
The Des Moines radar (KDMX), 39 km from the middle of the area, began a volume at 07:59 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, 8.0 hours before the alert went out and 236 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
- 30 J/kg
- Mixed-layer CIN
- -510 J/kg
- Mixed-layer LCL
- 1634 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 190 m²/s²
- 0-3 km storm-relative helicity
- 298 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 |
|---|---|---|---|---|
| Aug 12, 8:30 PM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Lucas, Monroe, Van Buren, Wayne | 90 min |
| Aug 12, 9:23 PM CDT | Severe Thunderstorm Watch | SPC | Audrain, Boone, Callaway, Carroll, Chariton, Cooper and 13 more | 4 hr |
| Aug 13, 12:26 AM CDT | Mesoscale Discussion | SPC | Lincoln, Saint Charles, Saint Louis, Warren, City of Saint Louis | 64 min |
Nearby
Mesoscale Discussions in Iowa, 2007Mesoscale Discussions in Missouri, 2007Every mesoscale discussion in 2007
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.