CHEYENNE, Wyo. (AP) — The National Weather Service says cooler weather and lighter winds will help lower the risk of fires starting and growing in Wyoming on Friday.

However, dangerous conditions could return Sunday or Monday.

Several large wildfires are still burning in the state, including a 16,401-acre blaze in the Wind River Indian Reservation in central Wyoming. The Alpine Lake fire is being allowed to burn in rugged, inaccessible terrain but firefighters plan to attack it once it burns out of the roadless area into open sage and grass rangelands.

Near Rock Springs, crews are making progress containing a fire burning on about 1,000 acres in steep, rugged Bureau of Land Management Land. The cause isn't known.

Fires are also are burning in the Bighorn and Bridger-Teton national forests.