Alert archive / North Dakota / Mesoscale Discussions in 2007
Mesoscale Discussion 847
The Storm Prediction Center issued this mesoscale discussion at May 21, 2007, 12:22 PM MDT for 26 counties in North Dakota. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- May 21, 2007, 12:22 PM MDT (18:22 UTC)
- Expired
- May 21, 2007, 1:45 PM MDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 26 counties
Adams County, ND, Benson County, ND, Bottineau County, ND, Bowman County, ND, Burleigh County, ND, Dunn County, ND, Emmons County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, Logan County, ND, McHenry County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Pierce County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Sioux County, ND, Stark County, ND, Towner County, ND, Ward County, ND, Wells County, ND
The radar
The Bismarck radar (KBIS), 79 km from the middle of the area, began a volume at 18:22 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, 6.4 hours before the alert went out and 82 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
- 124 J/kg
- Mixed-layer CIN
- -413 J/kg
- Mixed-layer LCL
- 1282 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 231 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| May 21, 2:59 AM MDT | Mesoscale Discussion | SPC | Barnes, Benson, Bottineau, Burke, Cass, Cavalier and 20 more | 91 min |
| May 21, 1:11 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Benson, Billings, Bottineau, Bowman, Burleigh and 28 more | 9 hr |
| May 21, 5:17 PM MDT | Mesoscale Discussion | SPC | Adams, Benson, Bottineau, Burleigh, Dunn, Emmons and 18 more | 88 min |
Nearby
Mesoscale Discussions in North Dakota, 2007Every mesoscale discussion in 2007
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.