Arthur Iowa tornado and Newell Iowa tornado rated EF2 by NWS Survey Team

 

...TORNADO SOUTH OF CHEROKEE IOWA RATED EF1...


A supercell thunderstorm developed along the Plymouth and Cherokee County line on the evening of April 9 and produced a tornado south of Cherokee around 9:15 pm CDT.  There was damage done to two farmsteads, a hog confinement, several grain bins, and downed over a mile of power lines east of Highway 59.

A National Weather Service onsite survey team has rated the tornado as EF1 with winds near 110 mph.  The width of the tornado was around 300 yards.  The tornado developed 9 miles south of Cherokee and about a half mile east of Highway 59 where a power pole was snapped.  The tornado hit a farmstead one mile east of Highway 59 doing damage to several outbuildings, knocking out the windows from a home, and snapping several trees.  As the tornado continued to the east, a hog confinement building was destroyed and a couple of outbuildings were damaged on a farmstead to the south.  It was at this point the tornado reached its maximum strength and width as over one mile of power poles were snapped. As the tornado moved through another farmstead, several empty grain bins were dislodged from their moorings.  The tornado dissipated approximately 4 miles east of Highway 59 and 6 miles south of Aurelia, Iowa.

Other storm surveys were performed across northwestern Iowa by National Weather Service survey teams from Des Moines, Iowa and Omaha, Nebraska.

Additional information on these tornadoes…including specific track information…will be posted to our web site at weather.gov/siouxfalls later this week.

 

...TORNADO NEAR ARTHUR IOWA RATED EF2...

A supercell developed over northeast Nebraska on the evening of April 9 and produced several tornadoes over northwestern Iowa. One tornado developed southwest of Arthur, Iowa, in southern Ida County between 8:15 and 8:20 pm. The most significant damage was done to a farm that was located 2 miles west of Arthur where several buildings were damaged and there was damage to trees and power lines.

A National Weather Service onsite survey team has rated the tornado as EF2. An EF2 tornado has winds between 111 and 135 mph.  The tornado developed southwest of Arthur.  It strengthened as it crossed Highway 175 two miles west of Arthur where it did EF2 damage to a farmstead. The tornado was at its widest in this area – having a width of one-quarter mile. The tornado continued to move northeast and weaken as it moved north of Arthur. The tornado had a path length of approximately 4 miles.

A weaker tornado developed southwest of Galva, Iowa around 8:40 pm CDT. This tornado was rated EF1 when it did damage to an ethanol plant 2 miles south of Galva near Highway 20.

Additional information on these tornadoes…including specific track information…will be posted to our web site at weather.gov/siouxfalls later this week.

 

...TORNADO NEAR NEWELL IOWA RATED EF2...

* EVENT LOCATION:      Tornado began 2 miles northwest of Nemaha and ended 
approximately at the Buena Vista, Sac, Pocahontas, Calhoun county line.

* PEAK WIND: 125 MPH

* AVERAGE PATH WIDTH: 1/2 mile wide

* PATH LENGTH: 12 miles long.
* DISCUSSION/DAMAGE:   Multiple homes and outbuildings damaged or destroyed.


Philip Schumacher – Science and Operations Office
National Weather Service Sioux Falls, South Dakota



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