On Thursday, 14 June 2018 13:05:14 UTC-6, Steve Koerner wrote:
Very very sad to read of this accident.

This report has the accident occurring at 12:00.

https://aviation-safety.net/wikibase/wiki.php?id=212026


From Weather Underground, wind on June 9 at 11:56 at Driggs was 21 mph gusting to 25 mph, sky clear. Wind in the nearby mountains at 10,800 ft might have been greater and might have been more gusty:

https://www.wunderground.com/history...ic=&reqdb.wmo=

Steve, I looked around online for any weather stations on the mountain peaks, mainly Snotel, but could not find any or they are offline for the non-winter months. The station on top of the tram Jackson Hole was not reporting and I am not sure if it has historical data.

Here in Northern UT we had strong pre-frontal S/SW winds before the passing of a cold front from the NW Saturday night.

Sad, sad situation

Ron Gleason