Alert archive / South Dakota / Mesoscale Discussions in 2005
Mesoscale Discussion 1213
The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2005, 8:37 PM CDT for 6 counties in North Dakota; 19 counties in South Dakota. It was in force for 83 min.
The area
The outline as issued.
The facts
- Issued
- Jun 6, 2005, 8:37 PM CDT (01:37 UTC)
- Expired
- Jun 6, 2005, 10:00 PM CDT
- In force
- 83 min
- Issued by
- the Storm Prediction Center
All 25 counties
Burleigh County, ND, Emmons County, ND, McLean County, ND, Morton County, ND, Oliver County, ND, Sioux County, ND, Aurora County, SD, Brule County, SD, Buffalo 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, Jerauld County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 163 km from the middle of the area, began a volume at 01:40 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, 1.6 hours before the alert went out and 165 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
- 2051 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 2155 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 070137 SWOMCD SPC MCD 070137 SDZ000-NDZ000-070300- MESOSCALE DISCUSSION 1213 NWS STORM PREDICTION CENTER NORMAN OK 0837 PM CDT MON JUN 06 2005 AREAS AFFECTED...CENTRAL ND...CENTRAL SD CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 070137Z - 070300Z ...WW WILL BE REQUIRED SHORTLY FOR PORTIONS OF THE CENTRAL DAKOTAS... LLJ IS IN THE PROCESS OF STRENGTHENING FROM NRN NEB INTO THE CENTRAL DAKOTAS AS BOUNDARY LAYER DECOUPLES WITH LOSS OF HEATING. SCATTERED SUPERCELLS HAVE PROGRESSED ACROSS WRN SD/SWRN MT INTO SWRN ND WHERE AN AXIS OF ENHANCED INSTABILITY/SHEAR CURRENTLY EXIST. AS UPPER RIDGE AXIS SHIFTS DOWNSTREAM THUNDERSTORMS SHOULD CONTINUE TO SPREAD ACROSS THE NRN PLAINS. CURRENT THINKING IS TSTMS WILL GRADUALLY ELEVATE AS DECOUPLING OCCURS...ESPECIALLY GIVEN THE INHIBITION OBSERVED AT BIS. HOWEVER...CONTINUED BOUNDARY LAYER MOISTENING WITHIN BROAD WARM ADVECTION REGIME COMPLICATES THE SEVERE EVOLUTION...POSSIBLY MAINTAINING TORNADO THREAT ACROSS THIS REGION FOR SEVERAL MORE HOURS. WITH TIME...ONE OR MORE MCS/S MAY EVOLVE ACROSS THIS REGION. ..DARROW.. 06/07/2005 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FSD...ABR...BIS...UNR... 43550111 47830171 47420006 43599831
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 6, 9:00 PM CDT | Severe Thunderstorm Watch | SPC | Emmons, Logan, McIntosh, Morton, Sioux | 6 hr |
| Jun 6, 10:12 PM CDT | Mesoscale Discussion | SPC | Barnes, Benson, Burleigh, Eddy, Emmons, Foster and 15 more | 93 min |
| Jun 7, 1:46 AM CDT | Mesoscale Discussion | SPC | Barnes, Benson, Cass, Cavalier, Dickey, Eddy and 18 more | 89 min |
| Jun 7, 4:40 PM CDT | Mesoscale Discussion | SPC | Adams, Bowman, Burleigh, Emmons, Grant, Hettinger and 8 more | 65 min |
| Jun 7, 5:05 PM CDT | Tornado Watch | SPC | Adams, Benson, Billings, Bowman, Burleigh, Dunn and 20 more | 7 hr |
| Jun 7, 2:53 PM CDT | Mesoscale Discussion | SPC | Bennett, Butte, Custer, Dewey, Fall River, Haakon and 12 more | 37 min |
| Jun 7, 3:45 PM CDT | Tornado Watch | SPC | Bennett, Custer, Fall River, Haakon, Hughes, Jackson and 7 more | 8 hr |
Nearby
Mesoscale Discussions in South Dakota, 2005Mesoscale Discussions in North Dakota, 2005Every mesoscale discussion in 2005
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.