Tom McCarthy, Townsquare Media

UPDATE 3:00 p.m. Friday - CASPER, Wyo. (AP) — Conditions are favorable for firefighters trying to corral one of Wyoming's first significant wildfires so far this year.

The 300-acre Sensebaugh wildfire is burning in a remote area 15 miles southeast of Casper, not far from Muddy Mountain. Lighting is believed to have started the fire sometime last weekend.

The fire has burned more than 200 acres of mixed pine, grass and sagebrush.

Medicine Bow National Forest spokesman Aaron Voos said Friday higher humidity and a chance of rain are forecast. Even so, firefighters have requested help from more ground crews and another single-engine air tanker.

Two water-dropping helicopters and a small air tanker are already working the fire.

Wet spring weather has helped to keep wildfires to a minimum so far this summer after last year's unusually busy fire season.

UPDATE 6:00 a.m. Friday - The fire near the Natrona-Converse County line southeast of Muddy Mountain has grown to more than 200 acres in size.  Thursday night, crews from Natrona County, other state agencies along with BLM and the U.S. Forest Service were on the scene.  Helicopters were called in to assist ground teams, and officials say no structures were in immediate danger.  The fire is located in rugged terrain.

UPDATE 7:20 p.m. Thursday: County and state agency firefighters have responded to a wildland fire near the Converse and Natrona County line.

Authorities with Natrona County Emergency Management and the Wyoming State Forestry Division say the 10-acre Sensebaugh Fire is centered southeast of Muddy Mountain and continues to grow.

Firefighters with the Natrona County Fire Protection District, the Wyoming State Forestry Division and the Bureau of Land Management have been called to fight the blaze.

ORIGINAL STORY: Firefighers with the Natrona County Fire Protection District have been called to a fire near Casper Mountain.

Lt. Stew Anderson with Natrona County Emergency Management says the fire is located southeast of Muddy Mountain roughly half a mile from the Converse County border. At this time, Anderson says there's no indication as to how large the fire is.

According to eyewitness reports, smoke was seen on the east side of Casper Mountain during the 3:00 p.m. hour.

County commissioners approved a partial fire ban for Natrona County in late June.

Anthony Pollreisz and Rich Denison contributed to this report.