Alert archive / Iowa / Mesoscale Discussions in 2007
Mesoscale Discussion 1678
The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2007, 8:13 PM CDT for 33 counties in Illinois; 34 counties in Iowa; 12 counties in Missouri. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2007, 8:13 PM CDT (01:13 UTC)
- Expired
- Aug 7, 2007, 9:45 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 79 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Cedar County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Guthrie County, IA, Henry County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Bureau County, IL, Cass County, IL, DeWitt County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Iroquois County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Mercer County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Rock Island County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Will County, IL, Woodford County, IL, Adair County, MO, Clark County, MO, Daviess County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Lewis County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO
The radar
The Quad Cities radar (KDVN), 122 km from the middle of the area, began a volume at 01:15 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
Davenport, (KDVN), launched 00:00Z, 1.2 hours before the alert went out and 127 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
- 2540 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1080 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.7
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 8, 12:14 PM CDT | Mesoscale Discussion | SPC | Edgar, Iroquois, Vermilion | 91 min |
| Aug 8, 3:28 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Champaign, Christian, Clark and 23 more | 62 min |
| Aug 8, 3:50 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calhoun, Cass, Champaign, Christian and 28 more | 4 hr |
| Aug 8, 6:59 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Champaign, Christian and 29 more | 61 min |
| Aug 7, 11:46 PM CDT | Mesoscale Discussion | SPC | Fremont, Page, Taylor | 2 hr |
| Aug 8, 3:18 PM CDT | Mesoscale Discussion | SPC | Fremont, Page | 87 min |
| Aug 8, 4:43 PM CDT | Tornado Watch | SPC | Adams, Appanoose, Clarke, Davis, Decatur, Fremont and 10 more | 7 hr |
Nearby
Mesoscale Discussions in Iowa, 2007Mesoscale Discussions in Illinois, 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.