Action News viewer Miranda captured video of a cold air funnel over Delaware.
Justin Carvelli snapped this image in Pennsville, New Jersey.
Others captured similar photos.
According to the National Weather Service, cold air funnels form beneath showers or weak thunderstorms when the air aloft is especially cold.
The funnels are most common in the fall and spring when the sun is able to heat up the lower levels of the atmosphere, causing convection to bubble up and form showers, but temperatures around 15,000 to 20,000 feet above the ground are quite cold.
Cold air funnels are usually harmless, but on rare occasions they can touch down and cause EF-0 level tornado damage.