Alert archive / North Dakota / Mesoscale Discussions in 2017
Mesoscale Discussion 1381
The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2017, 2:20 PM CDT for 13 counties in Minnesota; 19 counties in North Dakota; 12 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2017, 2:20 PM CDT (19:20 UTC)
- Expired
- Jul 21, 2017, 4:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 95%
All 44 counties
Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Hubbard County, MN, Mahnomen County, MN, Marshall County, MN, Norman County, MN, Otter Tail County, MN, Pennington County, MN, Polk County, MN, Red Lake County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Nelson County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Brown County, SD, Campbell County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Sully County, SD, Walworth County, SD
The radar
The Fargo/Grand Forks radar (KMVX), 118 km from the middle of the area, began a volume at 19:20 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 7.3 hours before the alert went out and 188 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
- 211 J/kg
- Mixed-layer CIN
- -475 J/kg
- Mixed-layer LCL
- 1536 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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, 9:42 AM CDT | Mesoscale Discussion | SPC | Kittson, Marshall | 93 min |
| Jul 21, 12:47 PM CDT | Mesoscale Discussion | SPC | Clearwater, Kittson, Mahnomen, Marshall, Norman, Pennington and 2 more | 88 min |
| Jul 21, 3:07 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 14 more | 10 hr |
| Jul 21, 3:53 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Clay, Clearwater, Mahnomen, Norman and 4 more | 97 min |
| Jul 21, 6:25 PM CDT | Mesoscale Discussion | SPC | Aitkin, Becker, Benton, Big Stone, Carlton, Cass and 16 more | 95 min |
| Jul 20, 7:31 PM CDT | Mesoscale Discussion | SPC | Emmons, Grant, Morton, Sioux | 89 min |
| Jul 20, 10:26 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Campbell, Edmunds, Faulk, Hand, Hyde and 5 more | 3 hr |
| Jul 20, 11:25 PM CDT | Mesoscale Discussion | SPC | Brown, Campbell, Edmunds, Faulk, McPherson, Potter and 3 more | 65 min |
Nearby
Mesoscale Discussions in North Dakota, 2017Mesoscale Discussions in Minnesota, 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.