Actually the GS50 is rather new to me. My experience is mostly in an Ericson
The 1 day up the coast is a real number and it is not a hard 24 hours, it could be 28. Leave Astoria around 6 am (you did pick the departure day for a good early slack of course - or at least before noon). Sometime the next day you will be pulling into Neah Bay with enough time to fuel
up and get a good nights sleep.
You are going in fair weather
of course. The prevailing winds are from the NW. Light in the morning and building in the afternoon. (esp in the straights) Use this to your advantage. Delay departure is there is a southern gale in the forecast
This is a typical result for (oh say what?) 15 cruises up to the San Juans in the E39. (Ages ago my Cal
2-29 took 32 hours typically.)
As for bad weather
... In the summer the typical bad weather is a southern Gale. I've done that only once. 18' seas and 45 kt winds in the Cal
Oh for my day job I build and manage supercomputers. We use them to model the Columbia
river and the coastal margins. You can see some of the model results that show the currents along the coast.... Good lick navigating the website. But if you do take your time you can find historical data for the time of year that you are planning the trip.
Virtual Columbia River | Center for Coastal Margin Observation & Prediction