The National Weather Service has issued a significant weather advisory for southeastern Johnson and northern Natrona counties until 6:15 p.m. today.

The NWS also has issued a flash flood watch for portions of central and northern Wyoming through Thursday morning.

As of 5:38 p.m., Doppler radar was tracking a strong thunderstorm near Edgerton. The storm was moving southeast from five to 10 mph.

Half-inch hail and winds exceeding 40 mph will be possible with this storm. Heavy rainfall will occur and could fill ditches and culverts quickly.

Affected areas include Edgerton, Midwest, Salt Creek Country Club and Midwest School.

As a result of the storm, the NWS has issued an advisory for arroyo and small-stream flooding for northern Natrona County until 6:45 p.m.

Affected areas include Interstate 25 between mile markers 215 and 228, and between mile markers 232 and 234.

Excessive runoff from heavy rainfall will cause flooding of small creeks and streams as well as farm and country roads. Do not attempt to travel across flooded roads.