Alert archive / North Dakota / Mesoscale Discussions in 2011
Mesoscale Discussion 1638
The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2011, 9:15 AM CDT for 10 counties in Minnesota; 18 counties in North Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2011, 9:15 AM CDT (14:15 UTC)
- Expired
- Jul 17, 2011, 11:15 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 28 counties
Becker County, MN, 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, Benson County, ND, Cass County, ND, Cavalier County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, McHenry County, ND, Nelson County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Rolette County, ND, Steele County, ND, Towner County, ND, Traill County, ND, Walsh County, ND, Ward County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 110 km from the middle of the area, began a volume at 14:15 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, 2.3 hours before the alert went out and 220 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
- 4227 J/kg
- Mixed-layer CIN
- -184 J/kg
- Mixed-layer LCL
- 1037 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 156 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 37.4
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 16, 9:25 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Kittson, Lake of the Woods and 7 more | 95 min |
| Jul 16, 11:37 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Kittson and 9 more | 23 min |
| Jul 17, 9:58 AM CDT | Severe Thunderstorm Watch | SPC | Becker, Beltrami, Clay, Clearwater, Hubbard, Kittson and 8 more | 7 hr |
| Jul 17, 10:24 AM CDT | Mesoscale Discussion | SPC | Becker, Clay, Clearwater, Hubbard, Mahnomen, Norman and 5 more | 66 min |
| Jul 17, 12:49 PM CDT | Tornado Watch | SPC | Becker, Clay, Clearwater, Hubbard, Mahnomen, Norman and 3 more | 3 hr |
| Jul 17, 1:42 PM CDT | Mesoscale Discussion | SPC | Aitkin, Becker, Beltrami, Benton, Cass, Clay and 18 more | 93 min |
| Jul 17, 3:37 PM CDT | Tornado Watch | SPC | Becker, Clay, Grant, Otter Tail, Wadena, Wilkin | 6 hr |
| Jul 17, 4:34 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Benton, Carlton, Cass, Chippewa, Cook and 19 more | 7 hr |
| Jul 17, 6:34 PM CDT | Mesoscale Discussion | SPC | Big Stone, Traverse | 56 min |
| Jul 17, 11:01 AM CDT | Mesoscale Discussion | SPC | Benson, Eddy, Foster, Grand Forks, Nelson, Ramsey | 89 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; radar from the NEXRAD Level II archive.