David - I wouldn't worry about putting a quality heater (with a properly protected circuit and a heavy duty extension cord) on your boat for the next week or so.. this is gonna be a cold one for a while yet.
We drove up to Squamish to take part in the SQ YC Christmas Carol cruise this past weekend, below is what we saw on Howe Sound from the highway. The pic really doesn't do it justice, a nearby station (Pam Rocks) was recording steady wind in the 40s, gusts to 54 knot at the time.
In the end the cruise was cancelled (blowing up to 38 knots at the marina too) and we simply partied in the clubhouse.
