system
Given the following post, respond as if you're commenting on Reddit:
human
Why can New England weather fluctuate from feeling like spring (high of 60F) one day to being back in the dead of winter (high of 40F) the very next?

It's a pretty normal occurrence in New England for drastically different weather patterns to occur in a short amount of time. I remember one April day a few years ago when it was mid 50s during the day and then by the afternoon there were flurries! Why does this happen and is it unique to New England?
gpt
New England is part of the mid-latitude region of the Northern Hemisphere, which makes it a transitional and dynamically interesting region. There is a transfer of both energy and momentum from the equator to the poles. Part of this energy and momentum transfer is due to the formation of extratropical cyclones which bring cold air from the poles equatorward and warm air from the tropics poleward.

So now your question. The phenomena you are referring to are warm and cold fronts, which are boundaries between different air masses (such as cold/warm, but also dry/moist). When a front passes through a particular location, it can lead to some very drastic changes in the weather.