I was there on Friday (not climbing Tyndall) the rib looks fine there was some new snow remaining above 13K from this past week, looks like weekend warmed up so this may be gone now.
Reason has seldom worked because it has seldom been tried.
I did Tyndall on the 18th but went up the NW ridge and came down the N. Rib there is a little snow on it but its mainly the loose scree that you have to watch out for also ice in some places.