Alert archive / North Dakota / Mesoscale Discussions in 2007
Mesoscale Discussion 829
The Storm Prediction Center issued this mesoscale discussion at May 18, 2007, 3:26 PM CDT for 25 counties in North Dakota. It was in force for 64 min.
The area
The outline as issued.
The facts
- Issued
- May 18, 2007, 3:26 PM CDT (20:26 UTC)
- Expired
- May 18, 2007, 4:30 PM CDT
- In force
- 64 min
- Issued by
- the Storm Prediction Center
All 25 counties
Benson County, ND, Billings County, ND, Bottineau County, ND, Burke County, ND, Cavalier County, ND, Divide County, ND, Dunn County, ND, Eddy County, ND, Foster County, ND, Griggs County, ND, McHenry County, ND, McLean County, ND, Mercer County, ND, Mountrail County, ND, Nelson County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Stark County, ND, Towner County, ND, Ward County, ND, Wells County, ND
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, 8.4 hours before the alert went out and 134 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
- 362 J/kg
- Mixed-layer CIN
- -435 J/kg
- Mixed-layer LCL
- 1771 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 89 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 18, 3:43 PM CDT | Severe Thunderstorm Watch | SPC | Barnes, Benson, Bottineau, Burke, Burleigh, Cass and 32 more | 7 hr |
| May 18, 5:47 PM CDT | Mesoscale Discussion | SPC | Adams, Grant, Hettinger, Morton, Sioux | 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.