Storm Warnings

Altocumulus clouds usually appear as parallel bands or rounded masses. 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. The presence of altocumulus clouds on a warm and humid summer morning is commonly followed by thunderstorms later in the day.

Today's photo was take by WPC Watershed Data Analyst Eli Long.

E-mail Today's WPC Daily to a Friend!

Sign Up for WPC Daily