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Old 24-09-2010, 06:00   #1
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GFS or NAM ?

I'm looking at the GFS and NAM forecasts on passageweather.com, and it seems there is a meaningful difference in the forecast for my area over the next 72 hours. (We're planning to head from Manasquan Inlet to Atlantic City or Cape May.)
I have heard colloquially that NAM is smaller scale and is supposed to be more accurate on/near land, but after googling around I haven't found anywhere that gives an authoritative answer on why you should use it over GFS in those situations. Does anyone have a reference or good explanation?

Thx,
-S
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Old 24-09-2010, 06:33   #2
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No, I dont have an explanation. It happens all the time and I always use the worst weather forcast. add +5 knots.

That seems to work for me.


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