Alert archive / Minnesota / Mesoscale Discussions in 2004
Mesoscale Discussion 1755
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2004, 6:02 PM CDT for 4 states. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2004, 6:02 PM CDT (23:02 UTC)
- Expired
- Jul 21, 2004, 8:00 PM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
All 97 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Emmet County, IA, Ida County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Aitkin County, MN, Becker County, MN, Beltrami County, MN, Benton County, MN, Big Stone County, MN, Cass County, MN, Chippewa County, MN, Clearwater County, MN, Cottonwood County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Jackson County, MN, Kandiyohi County, MN, Koochiching County, MN, Lac qui Parle County, MN, Lake of the Woods County, MN, Lincoln County, MN, Lyon County, MN, Mahnomen County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Murray County, MN, Nobles County, MN, Otter Tail County, MN, Pennington County, MN, Pipestone County, MN, Pope County, MN, Red Lake County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Roseau County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Yellow Medicine County, MN, Antelope County, NE, Boyd County, NE, Cedar County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Holt County, NE, Knox County, NE, Madison County, NE, Pierce County, NE, Stanton County, NE, Thurston County, NE, Wayne County, NE, Aurora County, SD, Bon Homme County, SD, Brookings County, SD, Charles Mix County, SD, Clark County, SD, Clay County, SD, Codington County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Roberts County, SD, Sanborn County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Minneapolis radar (KMPX), 207 km from the middle of the area, began a volume at 23:01 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
Minneapolis, MN (KMPX), launched 12:00Z, 11.0 hours before the alert went out and 205 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
- 97 J/kg
- Mixed-layer CIN
- -248 J/kg
- Mixed-layer LCL
- 981 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 333 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.4
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 20, 11:08 PM CDT | Mesoscale Discussion | SPC | Howard, Mitchell, Winnebago, Worth | 97 min |
| Jul 21, 9:03 AM CDT | Mesoscale Discussion | SPC | Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 17 more | 117 min |
| Jul 21, 9:35 AM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Benton, Cedar, Clinton, Davis, Des Moines and 24 more | 5 hr |
| Jul 21, 1:01 PM CDT | Mesoscale Discussion | SPC | Appanoose, Benton, Cedar, Clinton, Davis, Des Moines and 22 more | 89 min |
| Jul 21, 3:43 PM CDT | Mesoscale Discussion | SPC | Cherokee, Clay, Dickinson, Lyon, O'Brien, Osceola and 2 more | 92 min |
| Jul 20, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Chippewa, Cottonwood, Jackson, Kandiyohi, Lac qui Parle and 10 more | 4 hr |
| Jul 21, 1:30 PM CDT | Mesoscale Discussion | SPC | Big Stone, Lac qui Parle, Traverse | 2 hr |
| Jul 21, 1:50 PM CDT | Severe Thunderstorm Watch | SPC | Big Stone, Chippewa, Douglas, Grant, Kandiyohi, Lac qui Parle and 9 more | 5 hr |
| Jul 20, 7:20 PM CDT | Mesoscale Discussion | SPC | Campbell, Corson, Dewey, Edmunds, McPherson, Perkins and 3 more | 85 min |
Nearby
Mesoscale Discussions in Minnesota, 2004Mesoscale Discussions in South Dakota, 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; radar from the NEXRAD Level II archive.