(Natrona County Emergency Management)

CASPER, Wyo. — A passing thunderstorm brought localized flooding and other weather-related phenomena to Natrona County on Thursday afternoon.

A half-inch to an inch of rain was advised through 3:30 p.m. with the passage of the storm. Minor flooding is advised in low-lying and poor-drainage areas, as well as in normally dry creeks.

Flooded streets were also observed in urban areas.

“Turn around, don’t drown when encountering flooded roads,” the National Weather Service in Riverton advised. “Most flood deaths occur in vehicles.”

Multiple cold air funnels have also been spotted in the county, according to Natrona County Emergency Management:

We have had multiple reporting parties call into dispatch regarding the funnels, and deputies monitoring in the area.

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.

Natrona County Emergency Management.
Courtesy Katie VanArsdall