Another excellent chance for showers and thunderstorms will develop in the afternoon. Some of the rain could be heavy, which has prompted a Flood Watch for the urban corridor.
Memorial Day will start out with mostly sunny skies. However, by the afternoon we can still expect to see increasing clouds and a few scattered storms. Daytime highs will climb to the low 80s for the Denver metro area and eastern plains, with 60s and 70s in the mountains and mid-80s on the western slope.
While there's no official answer, it's the professional opinion of CBS News Colorado First Alert Meteorologist, Callie Zanandrie, that this is a phenomenon called "light pillars."