Steve, I believe that your are correct. When I started racing in 1988 TC hosted a race @Olympia. We gor kicked out of Olympia after the 89 race by the FCC/politics. We then hosted a race in the Tri-cities. Both events had to be aproved by the Conference board.
As for the weather, I remember the first year @ Mission, a race weekend with 106+ in the shade. One race weekend @Oly was 104, I have been to SIR with 100+, PIR 105+, Weather is part of racing rain or shine. G