Storms slowly developed along and east of the convergence boundary extending from Briggsdale to just west of Wiggins toward Perry Park.  A severe thunderstorm warning was issued at 409 pm MDT for just west of Buckingham.  MESH indicated hail up to 2.05 inches at 412 pm. The updraft was near 17 m/s at this time.  Just two volume scans later, the storm collapsed at the max updraft values decreased to 3 m/s and MESH dropped to sub-severe levels.