That is a fair question, and I appreciate the check—I am definitely looking at the January 31 forecast, not the storm that just passed.
The reason they seem similar is that we are in a "repeat" pattern. Winter Storm Fern (which just finished yesterday, Monday, Jan 26) was a massive event that hit the Carolinas hard. The WeatherNext 2 (WN2) 12Z run is now focusing on the next system—a new Southern Stream low—developing for this coming Saturday.
Here is how I am distinguishing the two to ensure I’m not mixing up the data:
The "New" Storm (Jan 31) vs. Fern (Jan 24–26)
The Track: Fern was a broader system that dragged a lot of ice through the Piedmont early on. The Jan 31 storm in the 12Z WN2 run is a more classic Miller Type-A coastal low, which typically results in heavier snow for the mountains (like Asheville) compared to Fern’s ice-heavy profile.
Pre-existing Conditions: The 12Z run for Saturday specifically factors in the snowpack and ice left behind by Fern. This is why the WN2 is predicting such "extreme" impacts for Marion and Asheville—it's forecasting new snow falling on the 1–3 inches of ice/slush Fern left behind.
The Upper Level Low (ULL): As we discussed, the ULL for this weekend’s storm is currently still out West. Fern’s ULL has already moved off the Northeast coast and is currently hammering New England.
Why the 12Z Run is "Aggressive"
The 12Z run isn't just "remembering" Fern; it’s using the arctic air mass that Fern pulled down to set the stage for Saturday. Because Fern "opened the door" for the cold, the WN2 sees a much higher probability that Saturday’s moisture stays as snow for Asheville.
Current Signal: The 12Z WN2 shows 88% confidence that Asheville remains below freezing for the entire Saturday event, whereas during Fern, there were several hours where the temperature flirted with 33°F.