Duncan - I'm sorry to say it, but you may be waiting a while for a PERFECT crossing window. There is just front after front coming through and the spans in between just aren't giving enough time for the gulfstream to settle down. We have a bit of a respite this weekend, but then another front is ripping through here on Sunday.
But dont give credence to my advice...please. I've done the crossing only 3-4 times. I just am repeating the "sound advice" given to me about waiting for an extended period of East to Southeast wind
flow to settle the stream....the waiting for an advancing cold front and shooting across ahead of it when the wind shifts to South.
So far, in my calculation since Nov1, there has been 2 windows to make the crossing...and the second window was a short one.