Alert archive / Missouri / Mesoscale Discussions in 2007
Mesoscale Discussion 1739
The Storm Prediction Center issued this mesoscale discussion at Aug 12, 2007, 8:30 PM CDT for Adams County, Hancock County, Illinois; 6 counties in Iowa; 21 counties in Missouri. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2007, 8:30 PM CDT (01:30 UTC)
- Expired
- Aug 12, 2007, 10:00 PM CDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 29 counties
Appanoose County, IA, Davis County, IA, Lucas County, IA, Monroe County, IA, Van Buren County, IA, Wayne County, IA, Adams County, IL, Hancock County, IL, Adair County, MO, Clark County, MO, Daviess County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Monroe County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO
The radar
The Des Moines radar (KDMX), 191 km from the middle of the area, began a volume at 01:30 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
Davenport, (KDVN), launched 00:00Z, 1.5 hours before the alert went out and 235 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
- 2394 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 1111 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- -0.2
- Supercell composite
- -3.3
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, 9:23 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calhoun, Pike | 4 hr |
| Aug 13, 12:26 AM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Christian, Clark, Clay, Clinton and 23 more | 64 min |
| Aug 13, 2:59 AM CDT | Mesoscale Discussion | SPC | Adair, Appanoose, Audubon, Boone, Calhoun, Carroll and 23 more | 61 min |
Nearby
Mesoscale Discussions in Missouri, 2007Mesoscale Discussions in Iowa, 2007Mesoscale Discussions in Illinois, 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.