Alert archive / South Dakota / Mesoscale Discussions in 2016
Mesoscale Discussion 683
The Storm Prediction Center issued this mesoscale discussion at May 22, 2016, 7:33 PM CDT for 5 counties in Minnesota; 14 counties in Nebraska; 33 counties in South Dakota. It was in force for 87 min.
The area
The outline as issued.
The facts
- Issued
- May 22, 2016, 7:33 PM CDT (00:33 UTC)
- Expired
- May 22, 2016, 9:00 PM CDT
- In force
- 87 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 52 counties
Big Stone County, MN, Lac qui Parle County, MN, Lincoln County, MN, Pipestone County, MN, Rock County, MN, Antelope County, NE, Boone County, NE, Boyd County, NE, Cedar County, NE, Garfield County, NE, Greeley County, NE, Holt County, NE, Knox County, NE, Loup County, NE, Pierce County, NE, Rock County, NE, Sherman County, NE, Valley County, NE, Wheeler County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clark County, SD, Clay County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, Marshall County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 107 km from the middle of the area, began a volume at 00:34 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
Aberdeen, SD (KABR), launched 00:00Z, 0.6 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
- 1223 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1730 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 30 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted.
071
ACUS11 KWNS 230033
SWOMCD
SPC MCD 230033
MNZ000-IAZ000-SDZ000-NEZ000-230200-
MESOSCALE DISCUSSION 0683
NWS STORM PREDICTION CENTER NORMAN OK
0733 PM CDT SUN MAY 22 2016
AREAS AFFECTED...CENTRAL NEB TO EASTERN SD AND SOUTHWEST MN
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 230033Z - 230200Z
PROBABILITY OF WATCH ISSUANCE...80 PERCENT
SUMMARY...A NEW SEVERE-WEATHER WATCH WILL LIKELY BE ISSUED THIS
EVENING FROM CENTRAL NEB INTO EASTERN SD AND PERHAPS SOUTHWEST
MN...TO THE EAST OF WW 191 AND THE SD PORTION OF WW 192. A TORNADO
THREAT SHOULD GRADUALLY DIMINISH THIS EVENING...WHILE A TRANSITION
TO PRIMARILY DAMAGING WINDS IS EXPECTED LATER THIS EVENING ACROSS
THE DISCUSSION AREA.
DISCUSSION...30-60-METER PER 12-HOUR 500-MB HEIGHT FALLS ARE
EXPECTED ACROSS THE MID MO VALLEY AND THE UPPER MIDWEST...AS A
SHORTWAVE TROUGH TRACKS FROM WY THROUGH THE WESTERN DAKOTAS TO
EASTERN ND/SOUTHERN MANITOBA BY 12Z MON. LOW-LEVEL MASS RESPONSE
WILL RESULT IN A STRENGTHENING S/SWLY LOW-LEVEL JET OF 50-65 KT
EXTENDING FROM CENTRAL NEB INTO EASTERN DAKOTAS AND FAR WESTERN MN.
THIS LLJ WILL MAINTAIN A POLEWARD MOISTURE/INSTABILITY FEED WITH AN
INCREASE IN TSTM COVERAGE ACROSS CENTRAL NEB/SD TO EASTERN ND THIS
EVENING. ALTHOUGH A TORNADO THREAT WILL REMAIN POSSIBLE YET THIS
EVENING AS THE LLJ STRENGTHENS...MODELS SUGGEST AN EVENTUAL UPSCALE
GROWTH FOR A LINEAR MCS WILL OCCUR AS STORMS MOVE INTO THE
DISCUSSION AREA...WITH DAMAGING WINDS BEING THE PRIMARY THREAT LATER
THIS EVENING.
..PETERS/EDWARDS.. 05/23/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...MPX...FSD...OAX...ABR...GID...LBF...UNR...
LAT...LON 42579968 43829937 45749809 45799701 45579650 44829588
44119584 42819698 41689800 41139862 41159900 41599944
42579968SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 1:58 PM CDT | Mesoscale Discussion | SPC | Anoka, Blue Earth, Brown, Carver, Cottonwood, Dakota and 31 more | 92 min |
| May 22, 8:22 PM CDT | Severe Thunderstorm Watch | SPC | Antelope, Boyd, Garfield, Holt, Knox, Loup and 2 more | 7 hr |
| May 22, 9:26 PM CDT | Mesoscale Discussion | SPC | Arthur, Blaine, Brown, Cherry, Custer, Dawson and 11 more | 94 min |
| May 22, 9:59 PM CDT | Severe Thunderstorm Watch | SPC | Arthur, Blaine, Brown, Chase, Cherry, Custer and 11 more | 5 hr |
| May 22, 10:19 PM CDT | Mesoscale Discussion | SPC | Dundy, Furnas, Hitchcock, Red Willow | 86 min |
| May 23, 1:13 AM CDT | Mesoscale Discussion | SPC | Adams, Antelope, Boone, Boyd, Buffalo, Cedar and 20 more | 92 min |
| May 23, 2:30 PM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Butler, Clay, Colfax, Fillmore and 18 more | 2 hr |
| May 22, 9:06 PM CDT | Mesoscale Discussion | SPC | Brown, Buffalo, Campbell, Corson, Dewey, Edmunds and 7 more | 114 min |
Nearby
Mesoscale Discussions in South Dakota, 2016Mesoscale Discussions in Nebraska, 2016Mesoscale Discussions in Minnesota, 2016Every mesoscale discussion in 2016
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.