As many regions experience unusually warm temperatures this weekend, forecasters are predicting a significant shift in weather patterns. Calm and warm days are expected to continue, with highs reaching into the middle 70s, making way for a major cold front set to arrive soon. Sunday will see a mix of warm weather and potential storms, followed by record lows and subzero wind chills as Arctic air sweeps across the area. Observers should prepare for a weather rollercoaster as near-record warmth gives way to a stark cooldown early next week.