(CNN) -- A fire at Yellowstone National Park in Wyoming continues to spread in the same area where a 2001 fire burned at the park.
The fire grew to about 191 acres as of late Friday. No closures are in effect, a park official said in a statement.
Saturday's weather is expected to be warmer, drier and windier.
The fire started from a lightning strike around midnight Wednesday, about two miles southwest of the park's east entrance. It is burning mostly within the perimeter of the 2001 "Arthur" fire, in fallen and standing dead trees.
CNN's Greg Morrison contributed to this report.