Observations (MRMS & RTMA) left vs. 18z NAM3 (right):
- Precip banding is clearly more evident in obs than simulated in NAM3 reflectivity:
- Temps in N NJ & NE PA are colder than modeled
- 2ndary low is a bit weaker & south of modeled - KSBY has ENE wind vs. modeled NNE wind pic.twitter.com/w3XZ38hkX6

— Tomer Burg (@burgwx) December 17, 2020