https://www.rockymountainglider.com/locale.html

WEATHER

(1) While no one would be so foolish as to guarantee the weather for any hang
gliding contest, the period scheduled for this meet should yield seven straight
days of outstanding flying conditions. The desert area around Dinosaur is
not affected by the high mountain weather which makes many mountain sites
inconsistent. (2) While a high mountain site could have a solid week of
virtually unflyable conditions, it is unlikely that there will be even a single
day at Dinosaur on which a safe, valid task cannot be called. (3) During the
post-monsoon period of this meet, pilots can expect a weather pattern dominated
by high pressure, with light westerly winds aloft and blue thermals/small
cumulus. Climbs above 17,000'msl are normal.

The numbers in parentheses and emphasis added.

The pilot writes:

Terry Reynolds and Crew, Jim and Amy Zeiset, and all those vested
deeply in Dinosaur 2015 should be applauded and recognized for their
enthusiastic and significant effort in putting on such a comp from scratch.
Events such as this are a labor of love and demonstrate both a philanthropic and
historical support for the sport of hang gliding. They are by nature cash
negative.

However, when will event organizers properly recognize the importance of
meteorological assessments and strategies? Pursuits which rely upon harvesting
energy from atmospheric discontinuities which is both reliable and safe must
fully understand the scope and impact of these parameters.

Reading the paragraph about the weather from the Dinosaur 2015 website in
advance (see above), and being somewhat familiar with the area, meteorological
patterns, and time of year for this event, I bit my lip, sublimated the
skepticism, and hoped for the best.

The good (1) and the bad (2), bad (3). Unfortunately my concerns about the
conditions proved to be only too well founded. Congratulations to Zippie on
another top performance and extending something of a real roll! Congratulations
to the organizers for putting on a very special event at a special site. It's
unfortunate that the weather didn't run against historic patterns, but it
didn't, and that's like crying over spilt milk.

The message: Make sure events, sites, and meet practice synch with
meteorological realities. Time is precious, as are the best and well-meaning
efforts and lives themselves.