Bjørn T. Hammer ()
writes:

Frode Halse, nick named Nimbus, has once again tested his oxygen
limits as he was sucked up by a nimbus over Vågå Wednesday July, 26th, 2006.
Apparently he was skimming in the outskirt of a nimbus when he lost control and
ended up in the strongest lift. Frode then rocketed up with max climb of 19,1
m/s (3,760 fpm) with a sixty second averager, peeking at 23,5 m/s (4,540
feet/min) reaching a maximum altitude of 6098 masl (20,000 feet). All recorded
by his Competino instrument.


Starting to black out he was kicked out of the nimbus and could start gliding
away totally covered by ice, which melted as he glided down into a more
hospitable part of the atmosphere. He then glided out his altitude and landed
soaking wet, and presumably very relived, some 40 km away from the nimbus.


This is Frode's third encounter with a nimbus. The first was in Austria in 1990
and again in Norway in 1996. The latter incident is thoroughly described here
(text in Norwegian – readable also for Swedes and Danes):
http://www.fridistanse.no/articles/nimbus.htm


Link to his track log:
http://www.flightlog.org/fl.html?l=1&a=34&user_id=314&trip_id=117929

Altitudes: 238 m to 6098 m (781 to 20,006 ft.). Max climb rate: 19.1 m/s (3,760 fpm). Max (ground) speed: 119 km/h (74 mph).