Don Gurnett:

Departed Muscatine (MUT) on a very windy day, about 20 knots from northwest, numerous cu with cloud base about 7,500 ft agl.

After exiting a climb upwind near cloudbase I encountered wave lift and climbed well above the clouds in what appeared to be a well developed cloud street and climbed to around 3750 meters,

then penetrated upwind to above and ahead of the next cloud in the street where I again started climbed in wave to over 4000 meters.

As it was freezing cold and since I did not have oxygen I started a descent and landed at Muscatine.

Wind in the wave was about 50 knots at about 300 degrees.

Near cloud base wind was from the same direction at 38 knots,

and about 16 to 20 knots near the ground when I landed.