Alert archive / North Dakota / Mesoscale Discussions in 2011
Mesoscale Discussion 1791
The Storm Prediction Center issued this mesoscale discussion at Jul 29, 2011, 9:14 PM MDT for Dawson County, Richland County, Wibaux County, Montana; 18 counties in North Dakota. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Jul 29, 2011, 9:14 PM MDT (03:14 UTC)
- Expired
- Jul 29, 2011, 10:15 PM MDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
All 21 counties
Dawson County, MT, Richland County, MT, Wibaux County, MT, Billings County, ND, Bottineau County, ND, Burke County, ND, Burleigh County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Renville County, ND, Stark County, ND, Ward County, ND, Williams County, ND
The radar
The Bismarck radar (KBIS), 161 km from the middle of the area, began a volume at 03:15 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 nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 3.2 hours before the alert went out and 165 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
- 478 J/kg
- Mixed-layer CIN
- -202 J/kg
- Mixed-layer LCL
- 2027 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
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 29, 8:06 PM MDT | Mesoscale Discussion | SPC | Adams, Bowman, Emmons, Grant, Hettinger, McIntosh and 2 more | 54 min |
| Jul 29, 10:52 PM MDT | Mesoscale Discussion | SPC | Barnes, Benson, Billings, Bottineau, Burleigh, Dickey and 23 more | 83 min |
| Jul 30, 4:47 AM MDT | Mesoscale Discussion | SPC | Dickey, LaMoure, McIntosh, Ransom, Richland, Sargent | 88 min |
| Jul 30, 2:22 PM MDT | Mesoscale Discussion | SPC | Barnes, Cass, Dickey, Griggs, LaMoure, Ransom and 4 more | 53 min |
| Jul 30, 4:31 PM MDT | Severe Thunderstorm Watch | SPC | Richland, Sargent | 7 hr |
Nearby
Mesoscale Discussions in North Dakota, 2011Mesoscale Discussions in Montana, 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.