** Damage Surveys from the October 4th Tornadoes **
A damage survey crew from the National Weather Service in Sioux Falls, SD is currently conducting damage surveys from Friday evening's tornadoes. They will be looking at damage and tornado paths through the entire day on Saturday in extreme southeast South Dakota and northwest Iowa. The National Weather Service from Omaha/Valley Nebraska will be studying tornado damage which occurred in Nebraska.
First up in extreme southeast South Dakota is a tornado, rated EF1, touched down 1 mile southeast of Jefferson in Union county, and tracked to the north to northeast for 3 miles in South Dakota. At that point, it crossed the Big Sioux River and moved into Plymouth county Iowa. The damage path was a quarter mile wide with estimated wind speeds of 100 mph. More information will be forthcoming as it went into Iowa.
Second, a tornado rated EF1, estimated winds of 100 to 110 mph, crossed the Missouri River at Dakota County Nebraska/Union county SD, then proceeded to one mile north of McCook Lake South Dakota. At 1.5 miles west of McCook Lake, roof and siding damage to houses and some garage walls collapsed.
Third, a tornado rated EF1, estimated winds of 100 to 110 mph, touched down near the cattle feedlot on I 29 just south of Jefferson, SD. The feedlot sustained damage. The tornado exhibited a brief path as it went north to northeast and lifted close to I 29. This tornado then touched down again 1 mile southeast of Jefferson detailed above. Summary, 3 confirmed separate tornadoes in Union County SD, all EF1.
The next tornado surveyed started just north of Climbing Hill in Woodbury County Iowa and tracked northeast to 3 miles west of Washta in Cherokee County. This tornado has been rated EF2, with a damage path up to 1 mile wide.
Two other tornadoes have been identified in southwestern Woodbury County. One came out of Monona County and dissipated just west of Sloan. Another formed west of Sloan and tracked northeast to near Bronson. Neither of these tornadoes have been rated as of this time.
Tornado number seven to be surveyed occurred in Buena Vista County Iowa and has been rated as EF1. This tornado touched down 1/2 mile east of Hanover and tracked 5 miles to the northeast to Alta where considerable damage to the bleachers and fences at the ball fields at the high school and trees around town and at the golf course occurred before lifting.
An eighth tornado has been confirmed by the Clay County Iowa Emergency Management. This one occurred approximately 2 miles south of Gillett Grove. This tornado has not yet been rated.
An area of straight line wind damage, with winds estimated at 60-70 mph, has also been found in the community of Quimby in southwestern Cherokee County Iowa.