Alert archive / Minnesota / Severe Thunderstorm Watches in 2005
Severe Thunderstorm Watch 649
The Storm Prediction Center issued this severe thunderstorm watch at Jul 20, 2005, 1:25 AM CDT for 18 counties in Iowa; 20 counties in Minnesota; 14 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2005, 1:25 AM CDT (06:25 UTC)
- Expired
- Jul 20, 2005, 6:58 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 52 counties
Buena Vista County, IA, Calhoun County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Hancock County, IA, Humboldt County, IA, Kossuth County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Pocahontas County, IA, Sioux County, IA, Webster County, IA, Winnebago County, IA, Wright County, IA, Blue Earth County, MN, Brown County, MN, Cottonwood County, MN, Faribault County, MN, Freeborn County, MN, Jackson County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Rock County, MN, Steele County, MN, Waseca County, MN, Watonwan County, MN, Yellow Medicine County, MN, Brookings County, SD, Codington County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD, Hanson County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD
The radar
The Sioux Falls radar (KFSD), 60 km from the middle of the area, began a volume at 06:26 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
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 2:29 AM CDT | Severe Thunderstorm Warning | FSD | Turner | 46 min |
| Jul 20, 2:47 AM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle, Yellow Medicine | 43 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
Minneapolis, MN (KMPX), launched 00:00Z, 6.4 hours before the alert went out and 230 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
- 2127 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1273 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 7.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 11:18 PM CDT | Mesoscale Discussion | SPC | Lyon, Sioux | 87 min |
| Jul 20, 3:23 AM CDT | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Buena Vista and 35 more | 2 hr |
| Jul 20, 5:55 AM CDT | Mesoscale Discussion | SPC | Allamakee, Audubon, Benton, Black Hawk, Boone, Bremer and 37 more | 95 min |
| Jul 20, 11:26 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 26 more | 94 min |
| Jul 19, 10:43 PM CDT | Mesoscale Discussion | SPC | Marshall, Norman, Pennington, Polk, Red Lake | 92 min |
| Jul 20, 1:28 AM CDT | Mesoscale Discussion | SPC | Beltrami, Cook, Koochiching, Lake, Saint Louis | 32 min |
| Jul 19, 7:39 PM CDT | Mesoscale Discussion | SPC | Hughes, Jones, Lyman, Mellette, Sully, Todd and 1 more | 2 hr |
| Jul 20, 5:12 PM CDT | Mesoscale Discussion | SPC | Bennett, Custer, Haakon, Jackson, Meade, Oglala Lakota and 1 more | 93 min |
| Jul 20, 6:20 PM CDT | Severe Thunderstorm Watch | SPC | Bennett, Brule, Buffalo, Gregory, Jackson, Jones and 5 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Minnesota, 2005Severe Thunderstorm Watches in Iowa, 2005Severe Thunderstorm Watches in South Dakota, 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.