Alert archive / North Dakota / Mesoscale Discussions in 2011
Mesoscale Discussion 1640
The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2011, 11:01 AM CDT for 6 counties in North Dakota. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2011, 11:01 AM CDT (16:01 UTC)
- Expired
- Jul 17, 2011, 12:30 PM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
Counties Benson County, ND, Eddy County, ND, Foster County, ND, Grand Forks County, ND, Nelson County, ND, Ramsey County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 125 km from the middle of the area, began a volume at 16:04 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, 4.0 hours before the alert went out and 196 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 | Barnes, Benson, Burleigh, Cass, Cavalier, Dickey and 21 more | 95 min |
| Jul 16, 11:37 PM CDT | Mesoscale Discussion | SPC | Barnes, Cass, Eddy, Foster, Grand Forks, Griggs and 7 more | 23 min |
| Jul 17, 9:15 AM CDT | Mesoscale Discussion | SPC | Benson, Cass, Cavalier, Eddy, Foster, Grand Forks and 12 more | 2 hr |
| Jul 17, 9:58 AM CDT | Severe Thunderstorm Watch | SPC | Barnes, Benson, Cass, Cavalier, Eddy, Foster and 14 more | 7 hr |
| Jul 17, 10:24 AM CDT | Mesoscale Discussion | SPC | Barnes, Benson, Cass, Eddy, Foster, Grand Forks and 5 more | 66 min |
| Jul 17, 12:49 PM CDT | Tornado Watch | SPC | Barnes, Cass, Grand Forks, Griggs, Nelson, Steele and 1 more | 3 hr |
| Jul 17, 1:42 PM CDT | Mesoscale Discussion | SPC | Barnes, Cass, Grand Forks, Griggs, Steele, Stutsman and 1 more | 93 min |
| Jul 17, 3:37 PM CDT | Tornado Watch | SPC | Barnes, Cass, Dickey, Griggs, Kidder, LaMoure and 8 more | 6 hr |
| Jul 17, 6:34 PM CDT | Mesoscale Discussion | SPC | Dickey, LaMoure, Ransom, Richland, Sargent | 56 min |
Nearby
Mesoscale Discussions in North 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.