Weather warning, watch, and advisories cover the Northeast and East U.S. this morning for the last blast of arctic air of the winter season. Added are High Wind Warnings for the Mid-Atlantic region which drive wind chill to -10F to -20F shortly after dawn tomorrow once the arctic air arrives. Fresh snow helps to enhance the incoming cold. The cold burst marks the coldest air mass of the season for NEPOOL with the second coldest for PJM-East.

One of the strongest climate signals during DEC/JAN/FEB representing extreme temperature across North America is the Asia/Bering Sea/North America (ABNA) index. The ABNA index 16-day forecast indicates a strong positive phase spike next week and representative of a widening anomalous warm pattern in North America.

Significant warming is observed in the equatorial Pacific Ocean subsurface during late January. The observation and trend support a rapid ending to La Nina in February with increased risk of El Nino developing during the northern hemisphere spring season.

A larger concern for the Northeast Corridor Coast this weekend is high wind propelling high sea conditions as the offshore system produces hurricane force wind with 50-60 MPH gusts reaching the coast and 40+ mph away from the coast.