* WHAT...Snow. Additional snow accumulations between 4 and 8 inches. Winds gusting as high as 30 mph along Turnagain Arm. * WHERE...East Turnagain Arm, Portage, and Turnagain Pass. * WHEN...Until noon AKST Wednesday. * IMPACTS...Visibilities reduced to one half mile or less due to blowing snow. Roads will likely become slick and hazardous. Travel could be difficult. Areas of blowing snow could significantly reduce visibility. The hazardous conditions could impact the Tuesday morning and evening commutes.