Alert archive / South Dakota / Mesoscale Discussions in 2007
Mesoscale Discussion 912
The Storm Prediction Center issued this mesoscale discussion at May 28, 2007, 7:40 PM CDT for 12 counties in North Dakota; 21 counties in South Dakota; Crook County, Weston County, Wyoming. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 28, 2007, 7:40 PM CDT (00:40 UTC)
- Expired
- May 28, 2007, 9:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 35 counties
Burleigh County, ND, Dickey County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Sioux County, ND, Stutsman County, ND, Brown County, SD, Butte County, SD, Campbell County, SD, Corson County, SD, Custer County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Haakon County, SD, Jackson County, SD, Lawrence County, SD, McPherson County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD, Crook County, WY, Weston County, WY
The radar
The Bismarck radar (KBIS), 170 km from the middle of the area, began a volume at 00:42 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, 0.7 hours before the alert went out and 170 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
- 151 J/kg
- Mixed-layer CIN
- -422 J/kg
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 105 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 28, 8:02 PM CDT | Mesoscale Discussion | SPC | Barnes, Cass, Grand Forks, Griggs, Nelson, Pembina and 3 more | 88 min |
| May 28, 10:47 PM CDT | Mesoscale Discussion | SPC | Dickey, LaMoure, Logan, McIntosh, Stutsman | 88 min |
| May 29, 1:14 AM CDT | Mesoscale Discussion | SPC | Emmons, Kidder, Logan, McIntosh, Stutsman | 2 hr |
Nearby
Mesoscale Discussions in South Dakota, 2007Mesoscale Discussions in North Dakota, 2007Mesoscale Discussions in Wyoming, 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.