* WHAT...Snow. Total snow accumulations of 2 to 4 inches with higher amounts of 3 to 7 inches south of Allakaket. Winds gusting as high as 50 mph may briefly reduce visibility to a half mile or less at times.

* WHERE...Upper Koyukuk Valley.

* WHEN...Until 3 AM AKDT Sunday.

* IMPACTS...Travel could become difficult. Areas of blowing snow could significantly reduce visibility. Gusty winds could bring down tree branches.

* ADDITIONAL DETAILS...The most hazardous travel conditions are expected at higher elevation summits.