Alert archive / Wisconsin / Mesoscale Discussions in 2004
Mesoscale Discussion 669
The Storm Prediction Center issued this mesoscale discussion at May 12, 2004, 2:22 PM CDT for 4 states. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- May 12, 2004, 2:22 PM CDT (19:22 UTC)
- Expired
- May 12, 2004, 3:45 PM CDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 73 counties
Allamakee County, IA, Bremer County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Hancock County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Worth County, IA, Baraga County, MI, Gogebic County, MI, Iron County, MI, Ontonagon County, MI, Chisago County, MN, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Steele County, MN, Wabasha County, MN, Washington County, MN, Winona County, MN, Adams County, WI, Ashland County, WI, Barron County, WI, Bayfield County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Crawford County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Forest County, WI, Grant County, WI, Iowa County, WI, Iron County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Monroe County, WI, Oneida County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Portage County, WI, Price County, WI, Richland County, WI, Rusk County, WI, Saint Croix County, WI, Sauk County, WI, Sawyer County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Vilas County, WI, Washburn County, WI, Wood County, WI
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 7.4 hours before the alert went out and 161 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
- 503 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 858 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 295 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.0
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 12, 11:29 AM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 12 more | 2 hr |
| May 12, 12:20 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Cerro Gordo, Chickasaw, Clayton, Fayette, Floyd and 5 more | 6 hr |
| May 12, 3:37 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 10 more | 83 min |
| May 12, 5:22 PM CDT | Mesoscale Discussion | SPC | Allamakee, Clayton, Fayette | 53 min |
| May 11, 7:00 PM CDT | Tornado Watch | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Mahnomen and 4 more | 6 hr |
| May 11, 7:22 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Cass, Clearwater, Hubbard, Mahnomen | 113 min |
| May 11, 8:45 PM CDT | Severe Thunderstorm Watch | SPC | Becker, Beltrami, Big Stone, Cass, Clay, Clearwater and 15 more | 5 hr |
| May 11, 10:08 PM CDT | Mesoscale Discussion | SPC | Big Stone, Grant, Lac qui Parle, Lincoln, Lyon, Otter Tail and 6 more | 2 hr |
Nearby
Mesoscale Discussions in Wisconsin, 2004Mesoscale Discussions in Minnesota, 2004Mesoscale Discussions in Iowa, 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.