CAPT OF AN ACR MLG LOST CTL MOMENTARILY AND CLBED ABOVE ASSIGNED ALT DUE TO TSTMS; TURB.

Narrative

ON DEP FROM CLEVELAND WITH LARGE TSTMS IN AREA WE WERE ON A VECTOR TO AVOID THE WX. ZOB ASKED WHEN WE COULD TAKE A HDG TO THE S. WE INFORMED THE CTLR THAT IT WOULD BE ABOUT 30 NM. WE ASKED FOR A FURTHER TURN TO THE N TO AVOID MORE WX. THE CTLR THEN WANTED US TO AGAIN TURN S; WHICH WOULD HAVE PUT US RIGHT IN THE HEAVIEST RETURNS. WE AGAIN TOLD HIM WE COULD NOT. AS THIS WAS ALL GOING ON AND WE WERE EVALUATING THE RADAR WE ENTERED SOME CLOUDS THAT WERE NOT SHOWING BIG RETURNS. I WAS ABOUT 125 FT HIGHER THAN OUR ASSIGNED 11000 FT WHEN WE ENTERED THE CLOUDS. THESE CLOUDS GAVE US A LIFTING ACTION. I TRIED TO DSND SMOOTHLY; BUT AS I KEPT PUSHING DOWN ON YOKE WE CONTINUED TO CLB QUICKLY WITH A THEN DOWNWARD FORCE CAUSING US TO LEVEL AT 10900 FT. BEFORE THE ACFT DSNDED WE CLBED TO APPROX 11350 FT. THE CTLR TOLD US TO MAINTAIN 11000 FT AND WE ANSWERED THAT WE WERE AT 11000 FT BECAUSE AT THAT TIME WE WERE WITHIN 100 FT. THIS ALL HAPPENED IN A VERY SHORT PERIOD OF TIME. THE CTLR NEVER SAID ANOTHER THING ABOUT THIS.