Alert archive / North Dakota / Mesoscale Discussions in 2007
Mesoscale Discussion 1684
The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2007, 2:09 PM CDT for 6 counties in Minnesota; 33 counties in North Dakota; 29 counties in South Dakota. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2007, 2:09 PM CDT (19:09 UTC)
- Expired
- Aug 8, 2007, 3:15 PM CDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
All 68 counties
Big Stone County, MN, Clay County, MN, Norman County, MN, Polk County, MN, Traverse County, MN, Wilkin County, MN, Barnes County, ND, Benson County, ND, Burleigh County, ND, Cass County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Nelson County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sheridan County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Walsh County, ND, Wells County, ND, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Marshall County, SD, McPherson County, SD, Miner County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD
The radar
The Aberdeen radar (KABR), 79 km from the middle of the area, began a volume at 19:10 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
Aberdeen, SD (KABR), launched 12:00Z, 7.2 hours before the alert went out and 126 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
- 244 J/kg
- Mixed-layer CIN
- -248 J/kg
- Mixed-layer LCL
- 973 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- -1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 |
|---|---|---|---|---|
| Aug 8, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Norman, Polk, Wilkin | 6 hr |
| Aug 8, 7:40 AM CDT | Mesoscale Discussion | SPC | Adams, Burleigh, Emmons, Grant, Hettinger, Morton and 3 more | 95 min |
| Aug 8, 6:17 PM CDT | Mesoscale Discussion | SPC | Barnes, Burleigh, Cass, Dickey, Eddy, Emmons and 22 more | 58 min |
| Aug 8, 3:56 PM CDT | Severe Thunderstorm Watch | SPC | Aurora, Beadle, Brown, Brule, Buffalo, Charles Mix and 17 more | 5 hr |
Nearby
Mesoscale Discussions in North Dakota, 2007Mesoscale Discussions in South Dakota, 2007Mesoscale Discussions in Minnesota, 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.