Alert archive / South Dakota / Mesoscale Discussions in 2011
Mesoscale Discussion 1752
The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2011, 3:59 PM CDT for 7 counties in North Dakota; 33 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 26, 2011, 3:59 PM CDT (20:59 UTC)
- Expired
- Jul 26, 2011, 6:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 40 counties
Dickey County, ND, Emmons County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Sargent County, ND, Sioux County, ND, Aurora County, SD, Beadle County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Haakon County, SD, Hamlin County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jackson County, SD, Jerauld County, SD, Jones County, SD, Kingsbury County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Mellette County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Aberdeen radar (KABR), 136 km from the middle of the area, began a volume at 21:01 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 12:00Z, 9.0 hours before the alert went out and 135 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
- 154 J/kg
- Mixed-layer CIN
- -337 J/kg
- Mixed-layer LCL
- 1066 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 203 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 10:45 AM CDT | Mesoscale Discussion | SPC | Burke, Burleigh, Divide, Emmons, Kidder, Logan and 10 more | 60 min |
| Jul 26, 2:07 PM CDT | Mesoscale Discussion | SPC | Billings, Divide, Golden Valley, McKenzie, Williams | 53 min |
| Jul 26, 3:43 PM CDT | Severe Thunderstorm Watch | SPC | Divide, Williams | 5 hr |
| Jul 26, 5:21 PM CDT | Tornado Watch | SPC | Dickey, Emmons, LaMoure, Logan, McIntosh, Sioux | 5 hr |
| Jul 25, 9:33 PM CDT | Mesoscale Discussion | SPC | Beadle, Brookings, Buffalo, Hamlin, Hand, Hughes and 9 more | 57 min |
| Jul 26, 5:06 PM CDT | Mesoscale Discussion | SPC | Mellette, Todd | 84 min |
| Jul 26, 5:43 PM CDT | Severe Thunderstorm Watch | SPC | Aurora, Beadle, Brule, Charles Mix, Douglas, Gregory and 4 more | 7 hr |
Nearby
Mesoscale Discussions in South Dakota, 2011Mesoscale Discussions in North Dakota, 2011Every mesoscale discussion in 2011
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.