Alert archive / North Dakota / Mesoscale Discussions in 2007
Mesoscale Discussion 1677
The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2007, 5:30 PM MDT for 4 states. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2007, 5:30 PM MDT (23:30 UTC)
- Expired
- Aug 7, 2007, 7:00 PM MDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 42 counties
Carter County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, McCone County, MT, Powder River County, MT, Prairie County, MT, Richland County, MT, Wibaux County, MT, Adams County, ND, Billings 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, Bennett County, SD, Butte County, SD, Custer County, SD, Fall River County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Ziebach County, SD, Campbell County, WY, Crook County, WY, Weston County, WY
The radar
The Bismarck radar (KBIS), 164 km from the middle of the area, began a volume at 23:30 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 12:00Z, 11.5 hours before the alert went out and 169 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1509 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -25 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 |
|---|---|---|---|---|
| Aug 7, 1:24 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Fallon, Powder River, Prairie, Rosebud | 2 hr |
| Aug 7, 1:59 PM MDT | Severe Thunderstorm Watch | SPC | Carter, Custer, Fallon, Powder River | 7 hr |
| Aug 7, 2:51 PM MDT | Severe Thunderstorm Watch | SPC | Dawson, McCone, Prairie, Richland, Wibaux | 6 hr |
| Aug 6, 6:24 PM MDT | Mesoscale Discussion | SPC | Aurora, Bon Homme, Brule, Charles Mix, Clay, Davison and 10 more | 96 min |
Nearby
Mesoscale Discussions in North Dakota, 2007Mesoscale Discussions in South Dakota, 2007Mesoscale Discussions in Montana, 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.