12/12/2022, 4:48 am EST
The larger aerial coverage of stronger cold for the 2022 arctic outbreak event is also expected to last longer than the 2013 episode only if the projected more expansive snow cover by the GFS ENS verifies.
News
12/11/2022, 9:13 am EST
The character of the -AO regime is about to change. The high-latitude high-pressure ridge shifts from Greenland to Alaska and gradually an Alaska “ridge bridge” toward Siberia develops. The result is increasing risk of a cross-polar arctic air surge from Siberia into North America in 7-10 days. The pattern described is often referred to as the “Siberian Express” and the Alaska “ridge bridge” phrase became popular after the North America “polar vortex” winter of 2013-14.
12/09/2022, 2:42 pm EST
The U.S. November 2022 thermal climate produced two distinct patterns: Cold West and warm East. The West U.S. finished the month in the top 10 coldest (for November) in the 128-year historical record. Idaho finished 4th coldest all-time. In the East, New England, North Carolina and Florida each finished in the top 10 all-time warmest for November. Nationally, the U.S. ranked 44 of 128 years where 1 is coldest and 128 is warmest.
12/06/2022, 8:17 pm EST
The November 2022 northern hemisphere snow cover was tied for 3rd most in the 1966-2022 record. In North America, November 2022 ranked 3rd most snowy on record while Eurasia was 12th most snowy of the past 57 years.