Alert archive / Iowa / Mesoscale Discussions in 2007
Mesoscale Discussion 1530
The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2007, 6:50 PM CDT for 24 counties in Illinois; 35 counties in Iowa; Grant County, Green County, Lafayette County, Wisconsin. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- Jul 18, 2007, 6:50 PM CDT (23:50 UTC)
- Expired
- Jul 18, 2007, 8:15 PM CDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
All 62 counties
Benton County, IA, Black Hawk County, IA, Buchanan County, IA, Cedar County, IA, Clarke County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Scott County, IA, Tama County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, DeKalb County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Marshall County, IL, McLean County, IL, Mercer County, IL, Ogle County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Stephenson County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Winnebago County, IL, Woodford County, IL, Grant County, WI, Green County, WI, Lafayette County, WI
The radar
The Quad Cities radar (KDVN), 117 km from the middle of the area, began a volume at 23:50 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
Lincoln, IL (KILX), launched 12:00Z, 11.8 hours before the alert went out and 340 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
- 1015 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 1147 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 205 m²/s²
- 0-3 km storm-relative helicity
- 205 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
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 |
|---|---|---|---|---|
| Jul 17, 9:31 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, DeKalb, Jo Daviess, Lee, Ogle and 3 more | 6 hr |
| Jul 17, 11:24 PM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, DeKalb, Henderson, Henry, Jo Daviess and 15 more | 96 min |
| Jul 18, 3:35 AM CDT | Mesoscale Discussion | SPC | Boone, Carroll, DeKalb, Jo Daviess, Kane, Lee and 5 more | 85 min |
| Jul 18, 4:21 AM CDT | Mesoscale Discussion | SPC | Clark, Clay, Coles, Crawford, Cumberland, Douglas and 10 more | 54 min |
| Jul 18, 4:59 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Champaign, Cook, DeKalb and 32 more | 91 min |
| Jul 18, 5:35 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, DeKalb, DeWitt, Fulton and 25 more | 6 hr |
| Jul 18, 6:38 PM CDT | Mesoscale Discussion | SPC | Champaign, Cook, Douglas, DuPage, Edgar, Ford and 11 more | 97 min |
| Jul 18, 12:47 PM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Buena Vista and 37 more | 2 hr |
| Jul 18, 2:09 PM CDT | Severe Thunderstorm Watch | SPC | Black Hawk, Boone, Bremer, Buena Vista, Butler, Calhoun and 33 more | 4 hr |
| Jul 18, 12:17 PM CDT | Mesoscale Discussion | SPC | Barron, Burnett, Chippewa, Clark, Dunn, Eau Claire and 24 more | 118 min |
| Jul 18, 1:37 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Calumet, Dodge, Door, Fond du Lac, Green Lake and 18 more | 7 hr |
| Jul 18, 3:42 PM CDT | Mesoscale Discussion | SPC | Buffalo, Chippewa, Clark, Dunn, Eau Claire, Jackson and 6 more | 63 min |
| Jul 18, 3:59 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Buffalo, Chippewa, Clark, Dunn, Eau Claire and 10 more | 5 hr |
| Jul 18, 5:46 PM CDT | Mesoscale Discussion | SPC | Brown, Calumet, Dodge, Fond du Lac, Green Lake, Manitowoc and 11 more | 119 min |
| Jul 18, 6:44 PM CDT | Mesoscale Discussion | SPC | Adams, Jackson, Juneau, La Crosse, Monroe, Trempealeau and 1 more | 2 hr |
Nearby
Mesoscale Discussions in Iowa, 2007Mesoscale Discussions in Illinois, 2007Mesoscale Discussions in Wisconsin, 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.