The National Weather Service has issued a heavy snow warning for the southern Alaska Panhandle, anticipating up to 13 inches of snow by Saturday due to a slow-moving storm. The snowfall is expected to vary across the region, influenced by local temperatures and elevation. Travel conditions are predicted to become 'very difficult' with reduced visibility and hazardous roads, especially during periods of heavier snowfall. Winter Weather Advisories are in effect for communities like Ketchikan, Metlakatla, and areas on Prince of Wales Island, with varying snowfall predictions.