Tom O'Keefe captures the scene from the 70-Smoot marker on the Mass. Ave. Bridge this morning.

The gloom approaches, as seen from the bridge crossing over the train tracks in Readville.

Around 6:30 or so, I was in Readville, where you could get a very nice view of the this big gray/black blob enveloping downtown - or at least, where downtown was supposed to be - even as the sky over Readville was still mostly blue (with some thunderhead-like clouds building up to the south). Almost looked more like smoke from a huge fire than clouds. Went shopping at the Hyde Park Shaw's (alert Steve Garfield: Looks like they're getting ready to change some of the aisles around!), by the time I got out, around 7, the gloom had enveloped Hyde Park and Roslindale. Wasn't particularly dense, but, man, did it make everything sticky.

Yeah, it's just the big microwave tower behind the Dunkin' Donuts and soon-to-be CVS at Washington Street and the West Roxbury Parkway in Roslindale. What's unusual about the photo is that I was basically right across the street from it when I took it, around 4:30 p.m., when the fog was dropping out of the sky like an unraveling roll of cotton gauze.

Jimbo posts a couple of photos of the fog along the East Boston waterfront, recounts his visit to Constitution Beach yesterday:

... Today I stopped by the beach (Shay's if you grew up here, Constitution if you didn't) and found the lifeguard chairs empty. There was no one there to guard. Some small children were in the play area, and three had ventured onto the sand to make a sandcastle. ...

What is this, San Francisco all of a sudden?

Brian Lewandowski watched yesterday's fog roll over downtown from Mt. Auburn Cemetery.

Posted under this Creative Commons license.

Tom captures the moment.

Castle Island in the fog this morning.

Fog wraps around the Pru.

The Nothing envelopes Government Center.

Dinghy in the fog this morning.