Alert archive / Minnesota / Mesoscale Discussions in 2009
Mesoscale Discussion 1640
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2009, 12:20 PM CDT for 11 counties in Iowa; 47 counties in Minnesota; Union County, South Dakota. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2009, 12:20 PM CDT (17:20 UTC)
- Expired
- Jul 21, 2009, 1:15 PM CDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 59 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Sioux County, IA, Anoka County, MN, Becker County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carver County, MN, Cass County, MN, Chippewa County, MN, Clearwater County, MN, Cottonwood County, MN, Crow Wing County, MN, Dakota County, MN, Douglas County, MN, Hennepin County, MN, Hubbard County, MN, Isanti County, MN, Jackson County, MN, Kanabec County, MN, Kandiyohi County, MN, Le Sueur County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Otter Tail County, MN, Pipestone County, MN, Pope County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Swift County, MN, Todd County, MN, Wadena County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN, Yellow Medicine County, MN, Union County, SD
The radar
The Minneapolis radar (KMPX), 118 km from the middle of the area, began a volume at 17:23 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, 5.3 hours before the alert went out and 115 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
- 187 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 527 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 78 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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Mesoscale Discussions in Minnesota, 2009Mesoscale Discussions in Iowa, 2009Mesoscale Discussions in South Dakota, 2009Every mesoscale discussion in 2009
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.