Alert archive / Iowa / Mesoscale Discussions in 2003
Mesoscale Discussion 2184
The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2003, 6:19 PM CDT for 24 counties in Iowa; Atchison County, Missouri. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Aug 18, 2003, 6:19 PM CDT (23:19 UTC)
- Expired
- Aug 18, 2003, 7:45 PM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 25 counties
Adair County, IA, Adams County, IA, Audubon County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cherokee County, IA, Crawford County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Ida County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pocahontas County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Taylor County, IA, Woodbury County, IA, Atchison County, MO
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 11.3 hours before the alert went out and 95 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
- 871 J/kg
- Mixed-layer CIN
- -256 J/kg
- Mixed-layer LCL
- 2262 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -52 m²/s²
- 0-3 km storm-relative helicity
- -43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 18, 2:05 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Crawford, Harrison, Ida, Monona and 3 more | 5 hr |
| Aug 18, 5:32 PM CDT | Mesoscale Discussion | SPC | Dickinson, Lyon, Osceola | 118 min |
Nearby
Mesoscale Discussions in Iowa, 2003Mesoscale Discussions in Missouri, 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.