Six days ago, extended analogs had a strong signal for high-impact weather Dec 22-24 (this Fri/Sat/Sun)…while the signal is still apparent in 6-8 day guidance, it suggests the high-impact pattern may be more amplified with a stronger storm and track further northwest. pic.twitter.com/1t2biEyivS
— CIPS Analog Guidance (@CIPSAnalogs) December 18, 2017