On Friday morning, warm air passing over the frozen Hudson River caused a heavy fog to form. It’s called advection fog, said David Windt, who posted the awesome photo below on Twitter. He noted that it was 60 degrees with no wind. We got several other excellent shots too.
(Click on the arrow on the right side of the last photo to show another photo.)
This fog was amazing as it formed at sea level as it rose up.
and just as interesting it was moving from south to north. The river flows from north to south as the ice was doing.
Actually, the Hudson goes in both directions with the ebb and flow of the tides from the NY Harbor.
Yes, tachnically the hudson is an estuary rather than a river — tides flow in both directions.
Another word for this phenomenon is “sea smoke”. An old timer here on Martha’s Vineyard said they used to call it “reek’, a word that originally meant smoke.