Completely agree with you, this storm was not some sudden unexpected burst, it was preceded by 90 minutes of building winds, dropping temps, and ominous dark clouds to the north. The officials gambled with trying to get in the championship 3200 (having allowed the unseeded heat to run right before it!), and they lost. A number of respected people had Rosa at 7:38 with one to go, even with slowing as he approached the barrier of officials who were apparently at the finish line. SOmeone has suggested that the police actually stopped the race, which is feasible.
Lots of dreams died in that race, not just the Rosa's, kids with a good chance to go sub-9, PR, etc... a GREAT field. On top of it, if they do not reschedule, no PV champs, Vena does not get his 4th MOC crown in the shot (had not begun his flight), many others. Just a debacle... not to mention the wisdom of not postponing the meet (temp close to 100, high humidity) to Monday, as many had lobbied for.