Alert archive / Iowa / Mesoscale Discussions in 2003
Mesoscale Discussion 1718
The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2003, 5:13 PM CDT for 25 counties in Iowa; 16 counties in Missouri; 11 counties in Nebraska. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2003, 5:13 PM CDT (22:13 UTC)
- Expired
- Jul 8, 2003, 6:45 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 52 counties
Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Cass County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Fremont County, IA, Harrison County, IA, Lucas County, IA, Madison County, IA, Marion County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Adair County, MO, Andrew County, MO, Atchison County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Linn County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Sullivan County, MO, Worth County, MO, Cass County, NE, Dodge County, NE, Douglas County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Sarpy County, NE, Saunders County, NE, Washington County, NE
The radar
The Omaha radar (KOAX), 124 km from the middle of the area, began a volume at 22:15 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 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 12:00Z, 10.2 hours before the alert went out and 377 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
- 823 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 796 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.6
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 7, 7:16 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Benton, Cass, Cedar, Clinton and 20 more | 3 hr |
| Jul 7, 10:15 PM CDT | Mesoscale Discussion | SPC | Crawford, Harrison, Ida, Monona, Plymouth, Pottawattamie and 1 more | 3 hr |
| Jul 7, 10:20 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Crawford, Fremont, Harrison, Ida, Mills and 4 more | 7 hr |
| Jul 7, 11:25 PM CDT | Mesoscale Discussion | SPC | Clay, Dickinson, Emmet, Kossuth, Lyon, O'Brien and 3 more | 2 hr |
| Jul 7, 11:40 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux | 5 hr |
| Jul 8, 1:34 AM CDT | Mesoscale Discussion | SPC | Cherokee, Crawford, Fremont, Harrison, Ida, Mills and 5 more | 116 min |
| Jul 8, 2:52 AM CDT | Mesoscale Discussion | SPC | Benton, Black Hawk, Boone, Bremer, Buchanan, Buena Vista and 49 more | 113 min |
| Jul 8, 8:50 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Cass and 32 more | 115 min |
| Jul 8, 9:50 AM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Benton, Black Hawk, Buchanan, Cedar, Clinton and 33 more | 5 hr |
| Jul 8, 12:59 PM CDT | Mesoscale Discussion | SPC | Benton, Black Hawk, Buchanan, Cedar, Clinton, Delaware and 17 more | 91 min |
| Jul 8, 1:45 PM CDT | Tornado Watch | SPC | Cedar, Clinton, Des Moines, Henry, Jackson, Johnson and 7 more | 5 hr |
| Jul 8, 3:40 PM CDT | Mesoscale Discussion | SPC | Des Moines, Henry, Lee | 95 min |
| Jul 8, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 22 more | 5 hr |
| Jul 8, 6:46 PM CDT | Mesoscale Discussion | SPC | Appanoose, Davis, Decatur, Lee, Ringgold, Taylor and 2 more | 3 hr |
| Jul 8, 1:21 PM CDT | Mesoscale Discussion | SPC | Audrain, Clark, Lewis, Lincoln, Marion, Pike and 1 more | 24 min |
| Jul 7, 7:48 PM CDT | Mesoscale Discussion | SPC | Arthur, Box Butte, Chase, Cheyenne, Deuel, Dundy and 14 more | 117 min |
| Jul 8, 2:36 PM CDT | Mesoscale Discussion | SPC | Box Butte, Dawes, Sioux | 84 min |
Nearby
Mesoscale Discussions in Iowa, 2003Mesoscale Discussions in Missouri, 2003Mesoscale Discussions in Nebraska, 2003Every mesoscale discussion in 2003
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.