I asked him what he looked for that confirmed a tornado touchdown? Why was it so difficult to see this storm on Radar? Why a tornado warning was not issued? Why viewers should treat severe thunderstorms like these [ +70 mph winds] just like tornado warnings? Watch the video a hear his answers.

You can read the full preliminary write-up here. 

...NWS DAMAGE SURVEY FOR 06/07/15 TORNADO EVENT...

.OVERVIEW...

A BOWING LINE OF STORMS CAUSED WIND DAMAGE ACROSS STARKE AND
PULASKI COUNTIES ON JUNE 7TH. EVIDENCE OF A TORNADO WAS FOUND
ON THE NORTHERN EDGE OF THIS LINE IN WESTERN STARKE COUNTY.
.WESTERN STARKE TORNADO...

RATING:                 EF-1
ESTIMATED PEAK WIND:    95 MPH
PATH LENGTH /STATUTE/:  0.18 MILES
PATH WIDTH /MAXIMUM/:   100 YARDS
FATALITIES:             0
INJURIES:               0
START DATE:             06/07/15 
START TIME:             0531 PM CDT
START LOCATION:         2 MI SOUTH OF ENGLISH LAKE
START LAT/LON:          41.2441/-86.8216
END DATE:               06/07/15
END TIME:               0536 PM CDT
END LOCATION:           2 MI SOUTH OF ENGLISH LAKE
END_LAT/LON:            41.2455/-86.8198