July 17, 2015 SEVERE WEATHER

On Friday, July 17th, 2015, a warm and humid air mass produced severe weather across northeast South Dakota and west central Minnesota. One of the initial storms formed over McPherson County and produced baseball size hail in Leola. Further east, in Marshall, Roberts and Day counties, the storms formed with strong rotation and developed into numerous wall clouds and funnel clouds producing a brief EF-0 tornado touchdown in Langford.  In Bristol, damage was done to a gas station canopy and grain bin along highway 12. Large hail broke car windows in Webster, with numerous injuries reported from broken glass. Several campers were overturned at a campground near Waubay, and two fires were reported due to downed power lines. Other strong storms were noted in Clark, Codington, Hamlin, Grant, Deuel, and Big Stone counties. There are radar animations of radar reflectivity and storm relative motion from this event at the end of this summary.

For the official storm summary report, visit:

https://nwschat.weather.gov/p.php?pid=201507191544-KABR-NOUS43-PNSABR

For all of the severe weather reports, visit:

https://nwschat.weather.gov/lsr/#ABR/201507171050/201507180459/0101

Storm Photos

Photos From McPherson County

Baseball Size Hail In Leola Image courtesy: Lindsey Gill	Storm Photo Near Wetonka           Image courtesy: Ron Keller

Photos From Marshall County

Large Hail In Britton Image courtesy: Aaron Henricks	Tornado NE of Langford  Image courtesy: Lance Johnson

Photos From Day County

Rolled Campers Bitter Lake Lodge	Rolled Campers Bitter Lake Lodge

Barn Damage Southeast Of Waubay	Grain Bin Damage Southeast Of Waubay

Gas Station Canopy Damage in Bristol           Image courtesy: Khristian Banley	Crop Damage Near Webster        Image courtesy: @duckdman

Photos From Roberts County

Tennis Ball Size Hail In Sisseton: Image courtesy: @Thirstrapmatt	Supercell Near Sisseton:                                Image courtesy: Patrick Gulan

Wall Cloud Looking West of Summit

Radar Images

Radar reflectivity from 4 PM CDT July 17th to 6:30 PM CDT July 17th.

Radar storm relative motion from 4 PM CDT July 17th to 6:30 PM CDT July 17th.

Radar reflectivity from 6:30 PM CDT July 17th to 8:45 PM CDT July 17th.

Radar storm relative motion from 6:30 PM CDT July 17th to 8:45 PM CDT July 17th.

Radar reflectivity from 8:45 PM CDT July 17th to 11 PM CDT July 17th.

Radar storm relative motion from 8:45 PM CDT July 17th to 11 PM CDT July 17th.