Thanks for the info. Sunday offered ideal conditions (firm snow up, softer on the descent) which made for an unexpectedly casual daytrip--back to the car early afternoon. Couldn't peel ourselves away from the S. Bro summit; basked in the sun for about an hour, admiring the outstanding views into the Olympics. A modest haze veiled most of the Cascades. Gorgeous day up there!
No 'natural' rockfall, but while on the summit we heard some careless climbers scrambling the final 150' send rock down the main route. Reportedly they very nearly dicked some unfortunate followers. (A modicum of care on that slope should prevent rockfall.) Wear your lid and beware the hazard presented by those above. We made a speedy (but careful) descent for this reason, well aided by that incredibly convenient glissade! All tolled, a thoroughly enjoyable trip on a spectacular mountain.