Originally Posted by Ski in NC
A one inch change in barometric pressure in inches of mercury means about a foot of water. Specific gravity of Hg I think is around 13.
So if barometer drops from 30.1 down to 29.1, could see a foot difference just due to that.
But when B drops that much, there is certainly going to be some wind involved, and that will likely have a larger effect.
Yes, that's what they say, in fact I thing it's closer to 2 feet with an inch and the higher the pressure the lower the tide.
But it doesn't work that way in my neighborhood. We had pretty normal tides most of Dec. and got hit with the extreme low tides this past week. The only striking change when the tides dropped was the temperature dropped. Winds have been high and low and barometric pressure has been between 30.10 and 30.31 for the most part throughout the time frame.
We always get extreme low tides in the winter months, but I can't figure out how to predict it other than cold air, which doesn't make sense.
The tide charts did indicate low tides, but not nearly as low as it is.
Still trying to figure it out....