Posted for <bjburr@mwheli.com>:

 And the thunderstorms at PVU the night of the accident were the worst
 that have been experienced in the past several years.  The Chelton data
 doesn't indicate that thunderstorm activity contributed physically to
 the accident but they may have contributed to the pilot wanting to get
 down much quicker than would have been normal.
 210 Kts at 1.5 miles from the threshold at 800 agl and descending 1900
 fpm at night seems awfully fast for me.
 Bryan
 N132BB
 Based at PVU