Winter weather advisories issued for 14 states as heavy snow approaches

The National Weather Service has issued winter weather advisories for 14 states, predicting up to 18 inches of snow in some areas. This comes as millions of Americans travel for the holiday season. States affected include Alaska, California, Nevada, and New York, among others. Heavy snow and strong winds are expected, particularly in Alaska's Upper Kobuk Valleys and Lower Koyukuk Valley. Winter storm warnings are also in effect for parts of California, Maine, and Vermont. Travelers are advised to prepare for difficult conditions on the roads.