Sounds like one of those polar vortex things: https://www.severe-weather.eu/long-range-2/early-data-weak-polar-vortex-usa-winter-2024-2025-fa/ https://www.sever

Sounds like one of those polar vortex things: https://www.severe-weather.eu/long-range-2/early-data-weak-polar-vortex-usa-winter-2024-2025-fa/ https://www.severe-weather.eu/long-range-2/early-data-weak-p... (Air current around the poles contains the coldest air at the poles, this is destabilised by warmer overall temperatures leading to that cold air escaping and bringing cold snaps to random areas further from the poles.)