Alert archive / Iowa / Mesoscale Discussions in 2004
Mesoscale Discussion 865
The Storm Prediction Center issued this mesoscale discussion at May 24, 2004, 1:24 PM CDT for 23 counties in Iowa; 15 counties in Minnesota. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- May 24, 2004, 1:24 PM CDT (18:24 UTC)
- Expired
- May 24, 2004, 3:00 PM CDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
All 38 counties
Black Hawk County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Emmet County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Humboldt County, IA, Kossuth County, IA, Mitchell County, IA, Palo Alto County, IA, Pocahontas County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Blue Earth County, MN, Brown County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Rice County, MN, Steele County, MN, Waseca County, MN, Watonwan County, MN
The radar
The Des Moines radar (KDMX), 159 km from the middle of the area, began a volume at 18:24 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
Minneapolis, MN (KMPX), launched 12:00Z, 6.4 hours before the alert went out and 188 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
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 613 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- 98 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 |
|---|---|---|---|---|
| May 24, 9:30 AM CDT | Mesoscale Discussion | SPC | Adams, Cass, Fremont, Mills, Montgomery, Page and 2 more | 2 hr |
| May 24, 10:10 AM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 6 hr |
| May 24, 11:30 AM CDT | Tornado Watch | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 19 more | 11 hr |
| May 24, 2:08 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 67 min |
| May 24, 2:35 PM CDT | Tornado Watch | SPC | Appanoose, Boone, Butler, Cerro Gordo, Clarke, Dallas and 26 more | 7 hr |
| May 24, 2:39 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 18 more | 96 min |
| May 24, 5:26 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 61 more | 94 min |
| May 24, 5:45 PM CDT | Tornado Watch | SPC | Appanoose, Davis, Des Moines, Lee, Van Buren, Wayne | 5 hr |
Nearby
Mesoscale Discussions in Iowa, 2004Mesoscale Discussions in Minnesota, 2004Every mesoscale discussion in 2004
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.