Key Takeaways
- Rigid temperatures are expected to impact the central and eastern United States in the coming weeks
- Three polar vortex systems are expected this month, with the first one arriving this week
- The Upper Midwest and Northern Plains will experience extremely cold temperatures, with wind chills between negative 10 to negative 25 degrees
- The polar vortex is a normal weather pattern that can bring freezing weather to the U.S., Europe, and Asia when it breaks off or drifts south
- Cold weather increases the risk of frostbite, and the National Weather Service uses the wind chill index to calculate the risk of frostbite
Introduction to the Polar Vortex
The United States is bracing for a cold snap in the coming weeks, with rigid temperatures expected to impact much of the central and eastern parts of the country. According to AccuWeather, the first of three polar vortex systems is expected to arrive this month, bringing with it rounds of flurries and squalls in certain locations. The surges of Arctic air will also assist in igniting storms with more widespread snow. AccuWeather Lead Long-Range Meteorologist Paul Pastelok noted that the outbreak this week will be the first of probably three such rounds, with another cold blast likely next week and a third the week after that.
The Impact of the Polar Vortex
The Upper Midwest and Northern Plains have already been hit by Canada’s freezing temperatures, with wind chills between negative 10 to negative 25 degrees expected on Thursday, December 4. The cold temperatures are expected to continue into Friday, December 5, for those in the eastern U.S. As the leading edge of the Arctic air moves southward, areas of flurries, snow, and larger snow squalls might accompany the front as it sweeps across the Great Lakes region and into the northern half of the Appalachians. This will lead to significant surges in energy demands, as people try to stay warm during the cold snap.
Understanding the Polar Vortex
The polar vortex is a massive circular upper-air weather system in the Arctic that covers the North Pole. It’s a normal pattern that tends to contain the coldest weather close to the North Pole and is stronger in the winter. A portion of the polar vortex may occasionally break off or drift south, bringing freezing weather to the U.S., Europe, and Asia. Normally, the jet stream locks the vortex in and keeps it there, but when it breaks off or drifts south, it can bring extremely cold temperatures to these regions. The polar vortex is not a new phenomenon, but it has been more active in recent years, bringing extreme cold snaps to various parts of the world.
The Risk of Frostbite
As temperatures begin to dip, cold weather significantly increases the risk of frostbite, especially as temperatures drop toward or below freezing. The National Weather Service uses computer modeling to calculate the wind chill index, which takes into account the heat transfer theory based on heat loss from the body to its surroundings. The wind chill index is a guide to help us understand how dangerous low temperatures and strong winds can cause frostbite. By using the wind chill chart, individuals can determine the wind chill temperature and take necessary precautions to avoid frostbite. It’s essential to dress warmly, wear layers, and limit exposure to cold weather to prevent frostbite.
Preparation and Safety
As the cold snap approaches, it’s essential to take necessary precautions to stay safe and warm. Individuals should check their homes for any drafts or leaks, insulate their pipes, and have a plan in place in case of a power outage. It’s also crucial to check on vulnerable neighbors, such as the elderly and young children, who may be more susceptible to the cold. By being prepared and taking necessary precautions, individuals can stay safe and warm during the cold snap. Additionally, it’s essential to stay informed about the latest weather forecast and any updates from local authorities to ensure safety and preparedness.
Conclusion
In conclusion, the polar vortex is expected to bring rigid temperatures to the central and eastern United States in the coming weeks. The first of three polar vortex systems is expected to arrive this week, bringing with it rounds of flurries and squalls in certain locations. It’s essential to understand the polar vortex, its impact, and the risk of frostbite to take necessary precautions and stay safe during the cold snap. By being prepared and informed, individuals can stay warm and safe during this period of extreme cold weather.
