Alert archive / South Dakota / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 773
The Storm Prediction Center issued this severe thunderstorm watch at Sep 5, 2005, 11:40 PM CDT for 4 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 5, 2005, 11:40 PM CDT (04:40 UTC)
- Expired
- Sep 6, 2005, 4:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Clay County, IA, Dickinson County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA, Jackson County, MN, Nobles County, MN, Rock County, MN, Boyd County, NE, Aurora County, SD, Bon Homme County, SD, Brule County, SD, Charles Mix County, SD, Clay County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 65 km from the middle of the area, began a volume at 04:41 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.
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 11:49 PM CDT | Severe Thunderstorm Warning | FSD | Murray, Pipestone, Rock | 41 min |
| Sep 6, 12:30 AM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 30 min |
| Sep 6, 1:08 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 52 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 4.7 hours before the alert went out and 176 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
- 239 J/kg
- Mixed-layer CIN
- -42 J/kg
- Mixed-layer LCL
- 1970 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 11:18 PM CDT | Mesoscale Discussion | SPC | Dickinson, Emmet, Lyon, O'Brien, Osceola, Sioux | 87 min |
| Sep 6, 2:52 AM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee, Clay and 21 more | 83 min |
| Sep 5, 7:13 PM CDT | Mesoscale Discussion | SPC | Becker, Beltrami, Big Stone, Clay, Clearwater, Grant and 16 more | 2 hr |
| Sep 5, 8:30 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Carlton, Cass, Crow Wing, Douglas, Hubbard and 9 more | 6 hr |
| Sep 5, 10:10 PM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Brown, Carver, Chisago, Hennepin and 13 more | 65 min |
| Sep 5, 10:20 PM CDT | Severe Thunderstorm Watch | SPC | Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 33 more | 5 hr |
| Sep 5, 7:30 PM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Dawson, Franklin, Frontier, Furnas and 12 more | 90 min |
| Sep 5, 11:00 PM CDT | Mesoscale Discussion | SPC | Adams, Clay, Franklin, Furnas, Harlan, Kearney and 4 more | 60 min |
| Sep 6, 3:18 PM CDT | Mesoscale Discussion | SPC | Arthur, Chase, Deuel, Dundy, Hayes, Hitchcock and 7 more | 87 min |
| Sep 6, 5:47 PM CDT | Mesoscale Discussion | SPC | Antelope, Arthur, Blaine, Boone, Brown, Garfield and 12 more | 118 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2005Severe Thunderstorm Watches in Iowa, 2005Severe Thunderstorm Watches in Minnesota, 2005Every severe thunderstorm watch 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.