WIND CAVE NATIONAL PARK (KOTA TV) - UPDATE: The approximate size of the fire was updated from 500 to 1,000 acres.
Great Plains Fire Information Reports that a thunderstorm Tuesday afternoon brought strong winds to the fire area, challenging firefighters working to limit the spread.
No rain was reported at nearby Elk Mountain, 0.02" was reported at Mt Rushmore and 0.14" at the Custer Airport but moisture evaporated quickly and did not help to contain the fire.
When the storm passed over the fire the temperature dropped 15 degrees within an hour, from 95 to 80 and the relative humidity increased temporarily from 16 to 29 percent, but within three hours dropped back to 21 percent.
Firefighters worked through the night to get a handle on a 300-acre fire burning in Wind Cave National Park.
The Rankin Wildfire, about a mile south-southwest of the Highland Creek Trailhead, was not contained as of 9:50 a.m. Federal, state and local resources (including air attack) are on the scene.
The fire, sparked by lightning, was reported Monday afternoon.
Two other fires are also burning in the region.
The Blackhawk Wildfire has burned 7.5 acres near Cook Lake in Crook County, Wyo. Federal resources are working the fire. It has not been contained yet. It reportedly was caused by equipment.
The Sanders Wildfire in the Bald Hills area along Highway 385 and Victoria Lake Road was reported Tuesday morning. It has burned three to four acres. This is reportedly a human-caused fire.