Alert archive / Minnesota / Mesoscale Discussions in 2011
Mesoscale Discussion 1959
The Storm Prediction Center issued this mesoscale discussion at Aug 12, 2011, 3:44 PM CDT for 32 counties in Minnesota; 22 counties in North Dakota; 13 counties in South Dakota. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2011, 3:44 PM CDT (20:44 UTC)
- Expired
- Aug 12, 2011, 5:15 PM CDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 67 counties
Becker County, MN, Beltrami County, MN, Big Stone County, MN, Cass County, MN, Chippewa County, MN, Clay County, MN, Clearwater County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Kandiyohi County, MN, Koochiching County, MN, Lac qui Parle County, MN, Lake of the Woods County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Pope County, MN, Red Lake County, MN, Roseau County, MN, Saint Louis County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Yellow Medicine County, MN, Barnes County, ND, Benson County, ND, Cass County, ND, Dickey County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Nelson County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Walsh County, ND, Wells County, ND, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Marshall County, SD, McPherson County, SD, Roberts County, SD, Spink County, SD
The radar
The Fargo/Grand Forks radar (KMVX), 86 km from the middle of the area, began a volume at 20:46 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
Aberdeen, SD (KABR), launched 12:00Z, 8.7 hours before the alert went out and 296 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
- 9 J/kg
- Mixed-layer CIN
- -231 J/kg
- Mixed-layer LCL
- 847 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 18 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 |
|---|---|---|---|---|
| Aug 11, 7:19 PM CDT | Severe Thunderstorm Watch | SPC | Pipestone, Rock | 5 hr |
| Aug 11, 9:42 PM CDT | Mesoscale Discussion | SPC | Lincoln, Pipestone, Rock | 63 min |
| Aug 12, 1:18 PM CDT | Mesoscale Discussion | SPC | Becker, Big Stone, Chippewa, Clay, Douglas, Grant and 11 more | 57 min |
| Aug 11, 7:16 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Bowman, Hettinger, Slope | 4 hr |
| Aug 11, 9:55 PM CDT | Mesoscale Discussion | SPC | Adams, Bowman, Hettinger, Slope | 65 min |
| Aug 12, 1:47 PM CDT | Severe Thunderstorm Watch | SPC | Barnes, Benson, Cass, Dickey, Eddy, Foster and 13 more | 6 hr |
Nearby
Mesoscale Discussions in Minnesota, 2011Mesoscale Discussions in North Dakota, 2011Mesoscale Discussions in South Dakota, 2011Every mesoscale discussion in 2011
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.