Alert archive / Minnesota / Mesoscale Discussions in 2004
Mesoscale Discussion 1806
The Storm Prediction Center issued this mesoscale discussion at Jul 31, 2004, 12:10 PM CDT for 4 states. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2004, 12:10 PM CDT (17:10 UTC)
- Expired
- Jul 31, 2004, 2:45 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
All 42 counties
Dickinson County, IA, Emmet County, IA, Osceola County, IA, Big Stone County, MN, Blue Earth County, MN, Brown County, MN, Chippewa County, MN, Cottonwood County, MN, Douglas County, MN, Grant County, MN, Jackson County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Otter Tail County, MN, Pipestone County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Watonwan County, MN, Wilkin County, MN, Yellow Medicine County, MN, Richland County, ND, Sargent County, ND, Codington County, SD, Day County, SD, Deuel County, SD, Grant County, SD, Marshall County, SD, Roberts County, SD
The radar
The Sioux Falls radar (KFSD), 176 km from the middle of the area, began a volume at 17:14 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, 5.2 hours before the alert went out and 189 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1038 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 194 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 |
|---|---|---|---|---|
| Jul 31, 3:00 PM CDT | Tornado Watch | SPC | Dickinson, Emmet, Kossuth, Lyon, Mitchell, Osceola and 2 more | 7 hr |
| Jul 31, 4:43 PM CDT | Mesoscale Discussion | SPC | Cherokee, Monona, O'Brien, Plymouth, Sioux, Woodbury | 62 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.