It is the NOAA weather site and these are the model runs (they do them every six hours). You can chose to have them show pressure, wind speed, direction and precipitation. There are two main models I look at; the GFS and the NAM (fine resolution… you will figure it all out with a little time). Both models often agree (on macro-scale features), but even when they don’t it tells you something about the uncertainty in the forecast.

You will also notice there are a bunch of other models and weather charts that I don’t have a need to understand, but you might. I don’t know if sailors use these, but nearly all other inland weather forecasters do. Check it out.

Good luck finding your window… I guess these will not be of use when you don’t have the internet. But for now you do.

-G