Alert archive / North Dakota / Mesoscale Discussions in 2011
Mesoscale Discussion 1622
The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2011, 1:54 AM MDT for 6 counties in Montana; 18 counties in North Dakota; Harding County, South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 15, 2011, 1:54 AM MDT (07:54 UTC)
- Expired
- Jul 15, 2011, 4:00 AM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Carter County, MT, Dawson County, MT, Fallon County, MT, Powder River County, MT, Richland County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burke County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, Hettinger County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Mountrail County, ND, Renville County, ND, Slope County, ND, Stark County, ND, Ward County, ND, Williams County, ND, Harding County, SD
The radar
The Bismarck radar (KBIS), 169 km from the middle of the area, began a volume at 07:55 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, 7.9 hours before the alert went out and 173 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
- 2132 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 698 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.2
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 14, 6:33 PM MDT | Mesoscale Discussion | SPC | Big Horn, Custer, Daniels, Dawson, Garfield, McCone and 11 more | 57 min |
| Jul 14, 10:01 PM MDT | Severe Thunderstorm Watch | SPC | Carter, Custer, Fallon, Powder River | 6 hr |
| Jul 15, 2:39 PM MDT | Mesoscale Discussion | SPC | Big Horn, Broadwater, Carbon, Custer, Gallatin, Golden Valley and 13 more | 2 hr |
| Jul 15, 3:26 PM MDT | Severe Thunderstorm Watch | SPC | Big Horn, Carbon, Custer, Golden Valley, Musselshell, Powder River and 4 more | 6 hr |
| Jul 14, 8:46 PM MDT | Mesoscale Discussion | SPC | Adams, Emmons, Grant, Kidder, Logan, McIntosh and 1 more | 59 min |
| Jul 14, 10:55 PM MDT | Mesoscale Discussion | SPC | Barnes, Cass, Dickey, Emmons, Kidder, LaMoure and 6 more | 65 min |
| Jul 15, 1:56 AM MDT | Severe Thunderstorm Watch | SPC | Barnes, Cass, Grand Forks, Griggs, Nelson, Ramsey and 6 more | 7 hr |
| Jul 15, 5:30 AM MDT | Mesoscale Discussion | SPC | Barnes, Cass, Ransom, Richland | 2 hr |
| Jul 15, 5:10 PM MDT | Mesoscale Discussion | SPC | Barnes, Cass, Dickey, LaMoure, Ransom, Richland and 2 more | 65 min |
Nearby
Mesoscale Discussions in North Dakota, 2011Mesoscale Discussions in Montana, 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.