Alert archive / North Dakota / Mesoscale Discussions in 2011
Mesoscale Discussion 2006
The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2011, 3:43 PM CDT for 24 counties in Minnesota; 33 counties in North Dakota; 26 counties in South Dakota. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Aug 18, 2011, 3:43 PM CDT (20:43 UTC)
- Expired
- Aug 18, 2011, 5:15 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 83 counties
Becker County, MN, Big Stone County, MN, Chippewa County, MN, Clay County, MN, Clearwater County, MN, Douglas County, MN, Grant County, MN, Kittson County, MN, Lac qui Parle County, MN, Lincoln 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, Stevens County, MN, Swift County, MN, Traverse County, MN, Wilkin County, MN, Yellow Medicine County, MN, Barnes County, ND, Benson County, ND, Burleigh County, ND, Cass County, ND, Cavalier County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Nelson County, ND, Oliver County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sheridan County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Traill County, ND, Walsh County, ND, Wells County, ND, Beadle County, SD, Brookings County, SD, Brown County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Kingsbury County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 93 km from the middle of the area, began a volume at 20:44 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
Aberdeen, SD (KABR), launched 12:00Z, 8.7 hours before the alert went out and 153 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
- 1339 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 1070 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
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 18, 4:45 PM CDT | Severe Thunderstorm Watch | SPC | Dickey, Emmons, LaMoure, Logan, McIntosh, Sioux | 4 hr |
| Aug 17, 9:18 PM CDT | Mesoscale Discussion | SPC | Mellette, Todd, Tripp | 57 min |
| Aug 18, 12:31 PM CDT | Mesoscale Discussion | SPC | Bon Homme, Clay, Hutchinson, Union, Yankton | 89 min |
| Aug 18, 1:27 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Union, Yankton | 8 hr |
| Aug 18, 6:18 PM CDT | Mesoscale Discussion | SPC | Union | 27 min |
Nearby
Mesoscale Discussions in North Dakota, 2011Mesoscale Discussions in South Dakota, 2011Mesoscale Discussions in Minnesota, 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.