Alert archive / Iowa / Mesoscale Discussions in 2013
Mesoscale Discussion 1645
The Storm Prediction Center issued this mesoscale discussion at Aug 6, 2013, 9:37 PM CDT for 4 states. It was in force for 113 min.
The area
The outline as issued.
The facts
- Issued
- Aug 6, 2013, 9:37 PM CDT (02:37 UTC)
- Expired
- Aug 6, 2013, 11:30 PM CDT
- In force
- 113 min
- Issued by
- the Storm Prediction Center
All 116 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cedar County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Delaware County, IA, Des Moines County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Fremont County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Harrison County, IA, Henry County, IA, Humboldt County, IA, Ida County, IA, Iowa 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, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mills County, IA, Monona County, IA, Monroe County, IA, Montgomery County, IA, Muscatine County, IA, Page County, IA, Pocahontas County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Ringgold County, IA, Sac County, IA, Scott County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Webster County, IA, Wright County, IA, Hancock County, IL, Henderson County, IL, McDonough County, IL, Mercer County, IL, Rock Island County, IL, Warren County, IL, Adair County, MO, Andrew County, MO, Atchison County, MO, Clark County, MO, Daviess County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Knox County, MO, Lewis County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO, Burt County, NE, Butler County, NE, Cass County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Platte County, NE, Richardson County, NE, Sarpy County, NE, Saunders County, NE, Stanton County, NE, Washington County, NE
The radar
The Des Moines radar (KDMX), 55 km from the middle of the area, began a volume at 02:37 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, 2.6 hours before the alert went out and 284 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
- 2597 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 776 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 5.7
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 7, 2:41 AM CDT | Mesoscale Discussion | SPC | Hancock, Henderson, Henry, Mercer, Rock Island, Warren and 1 more | 2 hr |
| Aug 7, 5:32 AM CDT | Mesoscale Discussion | SPC | Hancock, Henderson, Henry, Mercer, Rock Island, Warren and 1 more | 103 min |
| Aug 7, 6:36 AM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pulaski | 114 min |
| Aug 7, 7:52 AM CDT | Mesoscale Discussion | SPC | Cook, DuPage, Grundy, Kane, Kankakee, Kendall and 2 more | 113 min |
| Aug 7, 1:46 PM CDT | Mesoscale Discussion | SPC | Cook, DeWitt, DuPage, Ford, Fulton, Grundy and 14 more | 119 min |
| Aug 7, 1:51 AM CDT | Mesoscale Discussion | SPC | Andrew, Bates, Benton, Buchanan, Caldwell, Cass and 13 more | 54 min |
| Aug 7, 2:12 AM CDT | Severe Thunderstorm Watch | SPC | Barton, Bates, Benton, Camden, Cass, Cedar and 26 more | 6 hr |
| Aug 6, 10:21 PM CDT | Mesoscale Discussion | SPC | Chase, Dundy, Frontier, Hayes, Hitchcock, Lincoln and 2 more | 84 min |
| Aug 7, 5:13 PM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 7 more | 92 min |
| Aug 7, 6:02 PM CDT | Severe Thunderstorm Watch | SPC | Box Butte, Cherry, Dawes, Sheridan, Sioux | 6 hr |
Nearby
Mesoscale Discussions in Iowa, 2013Mesoscale Discussions in Missouri, 2013Mesoscale Discussions in Nebraska, 2013Every mesoscale discussion in 2013
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.