Alert archive / North Dakota / Mesoscale Discussions in 2021
Mesoscale Discussion 877
The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2021, 11:33 PM CDT for 4 counties in Minnesota; 5 counties in North Dakota. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- Jun 7, 2021, 11:33 PM CDT (04:33 UTC)
- Expired
- Jun 8, 2021, 1:00 AM CDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 244
Counties Becker County, MN, Clay County, MN, Otter Tail County, MN, Wilkin County, MN, Dickey County, ND, LaMoure County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND
The radar
The Aberdeen radar (KABR), 122 km from the middle of the area, began a volume at 04:35 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
Aberdeen, SD (KABR), launched 00:00Z, 4.6 hours before the alert went out and 177 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
- 2695 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 2391 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 5.8
The text
As transmitted.
307 ACUS11 KWNS 080434 SWOMCD SPC MCD 080433 MNZ000-NDZ000-080600- Mesoscale Discussion 0877 NWS Storm Prediction Center Norman OK 1133 PM CDT Mon Jun 07 2021 Areas affected...Southeastern ND...Northwestern MN Concerning...Severe Thunderstorm Watch 244... Valid 080433Z - 080600Z The severe weather threat for Severe Thunderstorm Watch 244 continues. SUMMARY...Severe threat continues across southeastern ND and northwestern MN. DISCUSSION...Sustained low-level warm advection will continue to encourage slow eastward propagation to the expanding thunderstorm complex over the upper Red River Valley region. Over the last few hours, episodic new updrafts have formed along the western flank, briefly exhibiting signs of hail production; however, eastward movement ultimately results in weaker updrafts and lesser hail potential. At this time it appears the primary risk will remain north of the ND/SD latitude, extending into portions of northwestern MN. In consultation with WSO FGF, ww244 has been extended in space/time into portions of northwestern MN to account for this slow-moving complex. ..Darrow.. 06/08/2021 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MPX...FGF...BIS... LAT...LON 46330005 47119581 46409490 46029585 46039852 46330005
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 4:09 AM CDT | Mesoscale Discussion | SPC | Cook, Lake | 2 hr |
| Jun 7, 8:35 PM CDT | Mesoscale Discussion | SPC | Barnes, Cass, Dickey, LaMoure, Logan, McIntosh and 1 more | 85 min |
| Jun 8, 3:36 AM CDT | Mesoscale Discussion | SPC | Barnes, LaMoure, Ransom, Richland, Sargent, Stutsman | 84 min |
| Jun 8, 1:06 PM CDT | Mesoscale Discussion | SPC | Burleigh, Emmons, McLean, Morton, Oliver, Sheridan and 1 more | 84 min |
| Jun 8, 3:39 PM CDT | Mesoscale Discussion | SPC | Divide, Golden Valley, McKenzie, Williams | 3 hr |
| Jun 8, 6:15 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Billings, Bowman, Divide, Dunn, Golden Valley and 5 more | 7 hr |
Nearby
Mesoscale Discussions in North Dakota, 2021Mesoscale Discussions in Minnesota, 2021Every mesoscale discussion in 2021
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.