The National Weather Service in Riverton has issued a Fire Weather Watch, which is in effect from Saturday afternoon through Monday evening. * IMPACTS: Low Humidities...Unseasonably Warm Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * WIND: West 20 to 25 mph with gusts up to 35 mph. * HUMIDITY: As low as 12 percent. RH recovery will be fair Saturday and Sunday nights. * TEMPERATURES: Highs in the upper 60s to middle 70s. Lows in the mid 30s.