Did anyone else notice the beautifully weird clouds over the city yesterday? We spotted them above the Williamsburg Bridge, just as the sun was starting to set. When we got home, we did a little research-- it seems that this type of cloud can be classified as "altocumulus":

Altocumulus may appear as parallel bands (top photograph) or rounded masses (bottom photograph). Typically a portion of an altocumulus cloud is shaded, a characteristic which makes them distinguishable from the high-level cirrocumulus. Altocumulus clouds usually form by convection in an unstable layer aloft, which may result from the gradual lifting of air in advance of a cold front.

Weather-buffs, feel free to correct our identification!