Alert archive / South Dakota / Mesoscale Discussions in 2006
Mesoscale Discussion 1821
The Storm Prediction Center issued this mesoscale discussion at Aug 15, 2006, 8:37 PM CDT for 17 counties in Minnesota; Richland County, Sargent County, North Dakota; 26 counties in South Dakota. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Aug 15, 2006, 8:37 PM CDT (01:37 UTC)
- Expired
- Aug 15, 2006, 9:30 PM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 45 counties
Big Stone County, MN, Chippewa County, MN, Douglas County, MN, Grant County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Meeker County, MN, Otter Tail County, MN, Pope County, MN, Renville County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wilkin County, MN, Yellow Medicine County, MN, Richland County, ND, Sargent County, ND, Brown County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jones County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 84 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 nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.6 hours before the alert went out and 46 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
- 332 J/kg
- Mixed-layer CIN
- -121 J/kg
- Mixed-layer LCL
- 2403 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 335 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 160137 SWOMCD SPC MCD 160137 MNZ000-SDZ000-NDZ000-160230- MESOSCALE DISCUSSION 1821 NWS STORM PREDICTION CENTER NORMAN OK 0837 PM CDT TUE AUG 15 2006 AREAS AFFECTED...SD...SERN ND...WCNTRL MN CONCERNING...SEVERE THUNDERSTORM WATCH 722... VALID 160137Z - 160230Z ...CONVECTION CONTINUES TO STRUGGLE ACROSS THE WATCH AREA... DESPITE THE INCREASE IN LLJ AND ASSOCIATED WARM ADVECTION...THUNDERSTORMS ARE STRUGGLING ACROSS CNTRL SD THIS EVENING. IT/S NOT ENTIRELY CLEAR WHETHER ADDITIONAL SEVERE ACTIVITY WILL DEVELOP NEAR THE WARM FRONT THIS EVENING. WILL CONTINUE TO MONITOR THIS REGION BUT IF TRENDS CONTINUE WATCH MAY NEED TO BE CANCELED. ..DARROW.. 08/16/2006 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...DLH...MPX...FGF...FSD...ABR...BIS...UNR... 45920197 45939800 46289801 46299729 46639726 46649617 46729618 46729515 46389515 46369464 45799461 45779424 45689418 45569413 45419404 45309416 45299428 44989426 44979453 44729450 44719464 44449461 44449476 44709537 44539534 44549561 44639561 44619645 44539646 44539786 44629786 44629869 44199868 44209892 43929892 43939936 43859932 43769942 43689950 43629932 43509927 43509961 43769966 43689985 43700029 43740059 43720068 43760084 43840105 43980106 44000104 44180105 44180118 44980113 45000152 45460149 45460200
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 3:50 PM CDT | Severe Thunderstorm Watch | SPC | Becker, Clay, Clearwater, Kittson, Mahnomen, Marshall and 6 more | 7 hr |
| Aug 16, 6:21 PM CDT | Mesoscale Discussion | SPC | Clay, Kittson, Lake of the Woods, Marshall, Norman, Pennington and 3 more | 84 min |
| Aug 16, 2:27 PM CDT | Mesoscale Discussion | SPC | Barnes, Cass, Dickey, Eddy, Foster, Grand Forks and 12 more | 2 hr |
Nearby
Mesoscale Discussions in South Dakota, 2006Mesoscale Discussions in Minnesota, 2006Mesoscale Discussions in North Dakota, 2006Every mesoscale discussion in 2006
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.