Alert archive / South Dakota / Mesoscale Discussions in 2005
Mesoscale Discussion 2011
The Storm Prediction Center issued this mesoscale discussion at Aug 17, 2005, 7:56 PM CDT for Boyd County, Nebraska; 25 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2005, 7:56 PM CDT (00:56 UTC)
- Expired
- Aug 17, 2005, 10:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 26 counties
Boyd County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Douglas County, SD, Faulk County, SD, Gregory County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hutchinson County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, McCook County, SD, Miner County, SD, Sanborn County, SD, Spink County, SD, Yankton County, SD
The radar
The Aberdeen radar (KABR), 138 km from the middle of the area, began a volume at 00:59 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, 0.9 hours before the alert went out and 83 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
- 1406 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1231 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 195 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 180057 SWOMCD SPC MCD 180056 SDZ000-NEZ000-180300- MESOSCALE DISCUSSION 2011 NWS STORM PREDICTION CENTER NORMAN OK 0756 PM CDT WED AUG 17 2005 AREAS AFFECTED...PARTS OF CENTRAL AND ERN SD CONCERNING...SEVERE THUNDERSTORM WATCH 728... VALID 180056Z - 180300Z STORMS CONTINUE -- MAINLY ACROSS NWRN PORTIONS OF WW. STRONG/OCCASIONALLY SEVERE STORMS PERSIST AHEAD OF N-S SURFACE TROUGH...WITHIN AXIS OF MODERATE INSTABILITY. THOUGH CONVECTIVE COVERAGE HAS INCREASED OVER THE PAST HOUR...STORMS APPEAR TO HAVE WEAKENED SLIGHTLY BASED ON LATEST RADAR IMAGERY. NONETHELESS...WITH SUFFICIENT SHEAR FOR ORGANIZED CONVECTION ACROSS THIS REGION -- PARTICULARLY ACROSS SRN HALF OF WW...THREAT FOR LOCALLY DAMAGING WINS/HAIL SHOULD CONTINUE FOR THE NEXT COUPLE OF HOURS WITH STRONGER STORMS. ..GOSS.. 08/18/2005 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...FSD...ABR...LBF...UNR... 44759984 45229979 45269676 42879729 42899981 44229955
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 9:22 PM CDT | Mesoscale Discussion | SPC | Boyd | 23 min |
| Aug 18, 2:05 PM CDT | Mesoscale Discussion | SPC | Box Butte, Dawes, Scotts Bluff, Sioux | 115 min |
| Aug 18, 4:49 PM CDT | Mesoscale Discussion | SPC | Pawnee, Richardson | 116 min |
| Aug 18, 5:35 PM CDT | Severe Thunderstorm Watch | SPC | Richardson | 6 hr |
| Aug 18, 3:27 PM CDT | Mesoscale Discussion | SPC | Buffalo, Campbell, Dewey, Edmunds, Faulk, Hand and 8 more | 2 hr |
Nearby
Mesoscale Discussions in South Dakota, 2005Mesoscale Discussions in Nebraska, 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.