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 North Central WY...Fire Weather Zone 276. * COUNTIES AFFECTED: In North Central WY...Park. * WIND: Saturday and Sunday: West 15 to 20 mph with gusts up to 35 mph. Monday: West 20 to 30 mph with gusts up to 50 mph. * HUMIDITY: As low as 11 percent. RH recovery will be poor Saturday and Sunday nights. * TEMPERATURES: Highs in the upper 60s. Lows in the lower 40s.