Heavy precipitation is expected across the U.S. ahead of Christmas, with rain and snow disrupting travel plans. The Northeast, Great Lakes, and West Coast will face significant weather challenges. Travel delays and hazardous conditions are anticipated on major highways and at airports as millions prepare for holiday trips. While some regions hope for a white Christmas, milder temperatures elsewhere will likely lead to rain instead of snow. The forecast indicates the busiest travel season on record as Americans navigate challenging weather patterns.