I don’t know if this is the best way to approach it, but there is a fog sensitivity control on the first tab (I think) under Preferences/Settings. My usual default setting is 45 (on a scale of 0 to 100), and more often than not, I’ve had reports that this is too high (making the forecasts too foggy) and needs to be turned down. However, your case (at least this time of year) could be the opposite. It might be interesting to experiment with that. I’d recommend running multiple forecasts using the same data but different fog settings. Let me know if that helps!
Tom