The National Weather Service in Billings has issued a Fire Weather Watch...which is in effect from Saturday afternoon through Saturday evening.
* IMPACTS: Low humidities, hot temperatures, and high-based thunderstorms with gusty and erratic outflow winds may create erratic fire behavior and new fire starts.
* AFFECTED AREA: In North Central WY Fire Zones...274...284. In South Central MT Fire Zones...123...124...125...126...127 128...129. In Southeast MT Fire Zones...130...131...132. In Southeast MT and Northwest SD Fire Zone...133.
* COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In North Central WY...Big Horn...Johnson...Sheridan...Washakie. In Northwest SD...Harding. In South Central MT...Big Horn...Carbon...Park...Stillwater Sweet Grass...Yellowstone. In Southeast MT...Carter...Custer...Fallon...Powder River Rosebud...Treasure. In Southwest MT...Gallatin.
* WIND: Southwest 10 to 20 mph with gusts to 25 mph.
* THUNDERSTORMS: Scattered afternoon and evening thunderstorms will produce gusty and erratic winds, and spotty rainfall.
* HUMIDITY: Minimums of 12 to 19 percent.
* TEMPERATURES: Highs of 99 to 107 below 5000 feet, hottest in the east.