The acars message said the pitot system failed causing AP and AT to disengage probably because of their recurring icing problem. Any speculation about weather other than icing taking the plane down needs to be proven. So far there is no evidence of that being the problem since none of the other flights with normal deviations had a problem.
Those who insist it was turbulence and flying into a thunderstorm that caused the accident have absolutely no proof and are speculating. We know BEA knows exactly why they crashed by now. When they write the report we will know too. Be patient.