Thanks all, made it to SFO (lovely clear skies now) with plenty of time to spare. We boarded 5954 around 16:15 and pulled back from the gate shortly after 16:30. Taxied out to a holding position on the tarmac and finally departed at around 5:22 arriving SFO 19:16. The impact of the day's weather obvious in SFO which was relatively quiet for a Friday evening.