Key Takeaways:
- A white Christmas is defined as having at least 1 inch of snow on the ground on December 25.
- A pattern change in the jet stream is expected to bring warmer temperatures to much of the US, reducing the chances of a white Christmas for many areas.
- The Mountain West, northern Plains, Upper Midwest, northern New England, and Great Lakes snow belts are the most likely to have a white Christmas.
- The odds of a white Christmas are less than 50% for most of the Lower 48, with some areas having a much higher or lower chance.
- Ski resorts in the West and northern New England, as well as cities like Marquette, Michigan, and Duluth, Minnesota, have a high chance of a white Christmas.
Introduction to the Weather Pattern
The northern tier of the United States has been experiencing cold and snowy weather since Thanksgiving, but a change in the weather pattern is expected to reduce the chances of a white Christmas for many areas. A white Christmas is defined as having at least 1 inch of snow on the ground on December 25, according to the National Oceanic and Atmospheric Administration. The recent cold and snowy weather has been caused by a wavy north-to-south oriented jet stream that has been driving frequent bouts of Arctic air into the central and eastern states from Canada.
The Jet Stream Pattern Shift
The jet stream is expected to smooth out and take a more level west-to-east path across the country, which will act as a wall to block long-lasting bouts of cold air from coming too far south out of Canada. This change in the jet stream pattern will lead to warmer-than-average temperatures for much of the US, with the exception of the far northern tier, which could see temperatures hover around or just below the norm for this time of year. As a result, some of the snow on the ground in the Midwest and Northeast will melt away due to the milder temperatures, and rainfall will also play a role in reducing the snow cover.
Impact on Snow Cover
The warmer temperatures and rainfall will have a significant impact on the snow cover in many areas. Forecast models show that much of the snow on Christmas morning will be in the places that usually have the best shot at a white Christmas, such as the Mountain West, northern Plains, Upper Midwest, northern New England, and the Great Lakes snow belts. However, it’s too soon to tell if any storm systems next week might bring new snowfall and save the day for those hoping for a white Christmas. The odds of this happening look slim, but it’s not impossible.
Historical Context
History tells us that the odds of a white Christmas are less than a coin flip for most of the Lower 48. If you want a nearly-guaranteed white Christmas, then head to a ski resort in the West or northern New England, or cities like Marquette, Michigan, and Duluth, Minnesota, which have odds of 90% or higher based on data from 1991-2020. Minneapolis-St. Paul has one of the highest chances for a major city at 74%, while other large cities like Chicago and New York have much lower chances, at 34% and 13%, respectively. Even in Denver and Salt Lake City, the chance of a white Christmas is less than 50%.
Regional Variations
The South has the lowest likelihood of a white Christmas, but there have been some rare instances. For example, in 2004, a snowstorm on Christmas Eve in South Texas reached all the way to the Texas Gulf Coast, setting up a strange Christmas scene of palm trees blanketed by snow. This highlights the unpredictability of the weather and the possibility of unusual events occurring. Overall, the chances of a white Christmas vary significantly depending on the region, and it’s essential to check the local weather forecast to get a more accurate prediction.
Conclusion
In conclusion, the chances of a white Christmas are looking slim for many areas due to the change in the jet stream pattern and the resulting warmer temperatures. However, some areas, such as the Mountain West and northern New England, have a higher chance of a white Christmas. It’s essential to check the local weather forecast and historical data to get a more accurate prediction. Whether or not you get a white Christmas, the holiday season is a time to enjoy the company of loved ones and appreciate the beauty of nature, regardless of the weather.