Alert archive / North Dakota / Mesoscale Discussions in 2017
Mesoscale Discussion 1386
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2017, 7:46 PM CDT for 28 counties in North Dakota; 13 counties in South Dakota. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2017, 7:46 PM CDT (00:46 UTC)
- Expired
- Jul 21, 2017, 9:15 PM CDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 41 counties
Barnes County, ND, Bottineau County, ND, Burke County, ND, Burleigh County, ND, Cavalier County, ND, Dickey County, ND, Emmons County, ND, Grant 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, Mountrail County, ND, Oliver County, ND, Pierce County, ND, Ransom County, ND, Renville County, ND, Rolette County, ND, Sargent County, ND, Sheridan County, ND, Sioux County, ND, Stutsman County, ND, Towner County, ND, Ward County, ND, Brown County, SD, Campbell County, SD, Corson County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, McPherson County, SD, Potter County, SD, Sully County, SD, Walworth County, SD
The radar
The Bismarck radar (KBIS), 74 km from the middle of the area, began a volume at 00:48 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, 0.8 hours before the alert went out and 70 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
- 2130 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1710 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.7
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 10:34 PM CDT | Mesoscale Discussion | SPC | Barnes, Benson, Burleigh, Cass, Cavalier, Dickey and 24 more | 56 min |
| Jul 21, 7:34 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Codington, Deuel, Grant, Hamlin | 6 hr |
| Jul 21, 10:16 PM CDT | Mesoscale Discussion | SPC | Aurora, Brookings, Brule, Charles Mix, Davison, Douglas and 11 more | 89 min |
Nearby
Mesoscale Discussions in North Dakota, 2017Mesoscale Discussions in South Dakota, 2017Every mesoscale discussion in 2017
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.