Alert archive / North Dakota / Mesoscale Discussions in 2011
Mesoscale Discussion 1545
The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2011, 5:38 PM CDT for 15 counties in Minnesota; 18 counties in North Dakota; Marshall County, Roberts County, South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2011, 5:38 PM CDT (22:38 UTC)
- Expired
- Jul 8, 2011, 7:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 35 counties
Becker County, MN, Big Stone County, MN, Clay County, MN, Grant County, MN, Kittson County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Stevens County, MN, Traverse County, MN, Wilkin County, MN, Barnes County, ND, Benson County, ND, Cass County, ND, Cavalier County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Pembina County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Towner County, ND, Traill County, ND, Walsh County, ND, Marshall County, SD, Roberts County, SD
The radar
The Fargo/Grand Forks radar (KMVX), 55 km from the middle of the area, began a volume at 22:39 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 10.6 hours before the alert went out and 227 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
- 57 J/kg
- Mixed-layer CIN
- -207 J/kg
- Mixed-layer LCL
- 1101 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 209 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 |
|---|---|---|---|---|
| Jul 8, 6:02 PM CDT | Tornado Watch | SPC | Big Stone, Clay, Traverse, Wilkin | 7 hr |
| Jul 8, 2:13 PM CDT | Mesoscale Discussion | SPC | Adams, Billings, Bottineau, Bowman, Burke, Burleigh and 20 more | 62 min |
| Jul 8, 2:32 PM CDT | Tornado Watch | SPC | Adams, Billings, Bottineau, Bowman, Burke, Burleigh and 30 more | 9 hr |
| Jul 8, 4:29 PM CDT | Mesoscale Discussion | SPC | Bennett, Brown, Brule, Buffalo, Butte, Campbell and 31 more | 2 hr |
| Jul 8, 4:48 PM CDT | Severe Thunderstorm Watch | SPC | Bennett, Butte, Campbell, Corson, Custer, Dewey and 14 more | 7 hr |
Nearby
Mesoscale Discussions in North Dakota, 2011Mesoscale Discussions in Minnesota, 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.