Why don't these guys actually look at a projection of the vortex from above instead of a stupid chart? You can gain so much more from seeing the behavior of the vortex.
This was across the entire area. Despite the models showing better CAA later, they clearly were too excited with the CAA in the lower levels this morning until now.
It's 3-4pm that was considered to cancel. At that time it looked like it would be into the single digits with a nasty wind chill. Boston has a big vulnerable population of walkers for many reasons. Trust me, a lot of shit gets factored in.