Alert archive / North Dakota / Mesoscale Discussions in 2011
Mesoscale Discussion 1667
The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2011, 5:02 AM CDT for 10 counties in Minnesota; 32 counties in North Dakota. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2011, 5:02 AM CDT (10:02 UTC)
- Expired
- Jul 20, 2011, 6:30 AM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
All 42 counties
Clay County, MN, Clearwater County, MN, Kittson County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Roseau County, MN, Barnes County, ND, Benson County, ND, Bottineau County, ND, Burke County, ND, Burleigh County, ND, Cass County, ND, Cavalier County, ND, Dunn County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Kidder County, ND, McHenry County, ND, McLean County, ND, Mercer County, ND, Mountrail County, ND, Nelson County, ND, Oliver County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Traill County, ND, Walsh County, ND, Ward County, ND, Wells County, ND
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 10.0 hours before the alert went out and 158 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
- 5088 J/kg
- Mixed-layer CIN
- -73 J/kg
- Mixed-layer LCL
- 1472 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 5.9
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, 5:25 AM CDT | Severe Thunderstorm Watch | SPC | Beltrami, Clearwater, Kittson, Lake of the Woods, Mahnomen, Marshall and 5 more | 6 hr |
| Jul 20, 10:43 AM CDT | Mesoscale Discussion | SPC | Beltrami, Clearwater, Kittson, Marshall, Pennington, Polk and 2 more | 62 min |
| Jul 20, 6:55 PM CDT | Mesoscale Discussion | SPC | Aitkin, Carlton, Cass, Cook, Itasca, Koochiching and 2 more | 95 min |
Nearby
Mesoscale Discussions in North 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.