A seasonal snowfall map shows that snow has already fallen across much of the West and the northern tier of the nation, as of Nov. 18, 2022.

As tens of thousands of Americans hit the roads and airways this Thanksgiving week to reunite with family, challenging weather conditions threaten to complicate their journeys across multiple regions. Travelers can expect delays as winter weather is likely to affect different parts of the country.

According to AccuWeather meteorologists, Eastern Tennessee, western North Carolina and parts of the Gulf Coast face heavy thunderstorms through Tuesday evening. The Great Lakes region will experience howling winds capable of causing power outages from Tuesday night through Thursday, with Buffalo, New York, particularly vulnerable. Temperatures could drop 15-20 degrees across the Central, Eastern and Southern states from Wednesday into Thursday. Southwestern Washington and northwestern Oregon are likely to see heavy rain, expected to cause delays in Seattle and Portland. Heavy lake-effect snow will spread across Michigan, northern Indiana, Ohio, Pennsylvania, and much of New York.

Stay ahead of severe weather with our interactive tracker, which monitors winter weather across the United States. The maps below illustrate how these weather systems will evolve throughout the week.

Snowfall maps show 24-hour, 48-hour, 72-hour and seasonal accumulation

Live weather alerts tracker: Real-time warnings and advisories across the U.S.

Updates every 5 minutes.

Snowfall forecast: Where 4 inches or more will fall in the next three days

4-day excessive rainfall forecast: Which areas face the highest chance of excessive rainfall

Track real-time storm damage reports

Click on any location to see tornado touchdowns, hail size, downed trees, flooded roads and other impacts from severe weather reports from the National Weather Service.

As severe weather or blizzards threaten, this map shows aggregated power outage information from more than 1,000 companies nationwide. Updates every 15 minutes.

This article originally appeared on USA TODAY: Where will it snow this week? See live forecast maps for Thanksgiving

Reporting by Yoonserk Pyun, Suhail Bhat and Ignacio Calderon, USA TODAY / USA TODAY

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