BRO-2320 UTC – 3DVAR max updraft versus MR/MS Hail Size track Posted in Live Blogs on May 8, 2012 by Travis Smith. 3DVAR maximum updraft intensity (2-hour) versus MR/MS Max Expected Size of Hail (2-hour) for the tornado-warned storm in the Brownsville CWA. Max MESH frequently follows the peak updraft intensity in storms that produce large hail.