Alert archive / South Dakota / Mesoscale Discussions in 2005
Mesoscale Discussion 2012
The Storm Prediction Center issued this mesoscale discussion at Aug 17, 2005, 9:22 PM CDT for 4 states. It was in force for 23 min.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2005, 9:22 PM CDT (02:22 UTC)
- Expired
- Aug 17, 2005, 9:45 PM CDT
- In force
- 23 min
- Issued by
- the Storm Prediction Center
All 53 counties
Becker County, MN, Beltrami County, MN, Clay County, MN, Clearwater County, MN, Grant County, MN, Hubbard County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Red Lake County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Cass County, ND, Dickey County, ND, LaMoure County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Boyd County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Douglas County, SD, Edmunds 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, Marshall County, SD, McCook County, SD, McPherson County, SD, Miner County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Yankton County, SD
The radar
The Aberdeen radar (KABR), 85 km from the middle of the area, began a volume at 02:23 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, 2.4 hours before the alert went out and 130 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 180223 SWOMCD SPC MCD 180222 MNZ000-SDZ000-NDZ000-NEZ000-180245- MESOSCALE DISCUSSION 2012 NWS STORM PREDICTION CENTER NORMAN OK 0922 PM CDT WED AUG 17 2005 AREAS AFFECTED...S CENTRAL AND SERN ND / CENTRAL AND ERN SD / NWRN MN CONCERNING...SEVERE THUNDERSTORM WATCH 727...728... VALID 180222Z - 180245Z THUNDERSTORMS CONTINUE ACROSS WW 727 AND 728...BUT SEVERE THREAT APPEARS TO BE SLOWLY DECREASING. NEW WW NOT ANTICIPATED ATTM. MODERATE INSTABILITY CONTINUES WITHIN WARM SECTOR...WHERE 1500 TO 2500 J/KG MEAN-LAYER CAPE CONTINUES. UPPER VORT MAX CONTINUES MOVING EWD ACROSS SD...SO EXPECT SURFACE TROUGH -- AND ASSOCIATED FORCING FOR NEW CONVECTIVE DEVELOPMENT -- TO SHIFT EWD WITH TIME. WITH WEAKER INSTABILITY FURTHER E ACROSS FAR ERN SD INTO WRN MN...CONVECTION SHOULD WEAKEN AS IT SHIFTS EWD OVER THE NEXT COUPLE OF HOURS. IN THE MEAN TIME...THREAT FOR LOCALLY DAMAGING WINDS/HAIL WILL PERSIST WITH STRONGEST STORMS -- MAINLY S OF THE SD/ND BORDER. ..GOSS.. 08/18/2005 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...DLH...MPX...FGF...FSD...OAX...ABR...BIS...LBF... 45800009 47069744 47619640 48019612 48229474 46269467 45539672 42869736 42819940 44829962
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 2:09 PM CDT | Mesoscale Discussion | SPC | Fillmore, Houston, Winona | 96 min |
| Aug 17, 7:56 PM CDT | Mesoscale Discussion | SPC | Boyd | 2 hr |
| 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 | Emmons, Logan, McIntosh | 2 hr |
Nearby
Mesoscale Discussions in South Dakota, 2005Mesoscale Discussions in Minnesota, 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.