Alert archive / South Dakota / Mesoscale Discussions in 2022
Mesoscale Discussion 2021
The Storm Prediction Center issued this mesoscale discussion at Dec 13, 2022, 6:23 PM CST for 4 counties in Minnesota; 8 counties in North Dakota; 12 counties in South Dakota. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 13, 2022, 6:23 PM CST (00:23 UTC)
- Expired
- Dec 13, 2022, 9:30 PM CST
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Heavy snow
All 24 counties
Clay County, MN, Norman County, MN, Polk County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, LaMoure County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Traill County, ND, Brown County, SD, Clark County, SD, Codington County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Hamlin County, SD, Hand County, SD, Marshall County, SD, McPherson County, SD, Roberts County, SD, Spink County, SD
The radar
The Aberdeen radar (KABR), 101 km from the middle of the area, began a volume at 00:25 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, 0.4 hours before the alert went out and 151 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
- 607 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 277 m²/s²
- 0-3 km storm-relative helicity
- 289 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
686
ACUS11 KWNS 140024
SWOMCD
SPC MCD 140023 COR
MNZ000-SDZ000-NDZ000-140330-
Mesoscale Discussion 2021
NWS Storm Prediction Center Norman OK
0623 PM CST Tue Dec 13 2022
Areas affected...northeastern South Dakota...southwestern North
Dakota...and western Minnesota
Concerning...Heavy snow
Valid 140023Z - 140330Z
CORRECTED FOR MISSING GRAPHIC
SUMMARY...Heavy snow with rates up to 1"/hr possible along with
reduced visibility due to blowing snow.
DISCUSSION...A surface low currently located over Nebraska continues
to lift northeastward this evening. Across the Dakotas, favorable
moisture profiles show deep saturation within the dendritic growth
layer, which will allow for snowfall rates around 1"/hr. Recent
surface observations show winds across central and eastern South
Dakota gusting to around 30-40 mph. Areas of blowing snow will be
possible, with reduced visibility. A transition zone from snowfall
to mixed precipitation (rain and freezing rain) continues just east
of the Big Sioux River, where surface temperatures are just above
freezing. HREF ensemble forecasts indicate that the zone of heaviest
snowfall rates of 1"/hr will continue to shift northward through the
evening into portions of eastern North Dakota and western Minnesota
as the low continues to track north and east.
..Thornton/Grams.. 12/14/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...FGF...FSD...ABR...BIS...
LAT...LON 45369945 45719933 46739840 47109801 47829685 48019639
47659586 47029590 46699604 46319623 45459687 45019691
44589725 44479805 44509916 45369945SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 14, 4:06 AM CST | Mesoscale Discussion | SPC | Aitkin, Benton, Carlton, Cass, Crow Wing, Itasca and 6 more | 5 hr |
Nearby
Mesoscale Discussions in South Dakota, 2022Mesoscale Discussions in North Dakota, 2022Mesoscale Discussions in Minnesota, 2022Every mesoscale discussion in 2022
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.