Over the past 24 hours, we have seen a big flip in model data when it comes to what to expect next week.

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The GFS long-range global model had us fairly warm this weekend, with the warmth sticking around through much of next week. That has really flipped over the past 24 hours. One of the best ways to talk about the change is with what happens at the 850mb (pressure) level.

Conditions in the Pittsburgh area - November 12, 2025 KDKA Weather Center

While the exact height above ground level varies, the 850 mb level's temperature is a great way to look at the movement of cold and warm air, which we call advection. Today's 850mb temperature is around -2°C. Saturday's the warmest it will be at aro

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