Now that the key trough for Weds moved onshore in CA & OR, the short-term NAM forecast is noticeably slower & more amplified than previous cycles. Not sure how much of this is due to assimilating radiosonde data, but it does indicate a potential trend back north may be underway. pic.twitter.com/fI5JIeRY0W

— Tomer Burg (@burgwx) December 14, 2020