The jet stream has been diverted well to the north around the northern periphery of the anomalous ridge — all the way up into Alaska, which has been
experiencing record warmth and storminess over the past several months.
Much of the Central and Eastern United States
experienced record warmth for mid-October due to heat and humidity associated with an expansive high pressure weather system that stretched from Bermuda over the eastern US as well as from winds in the upper atmosphere that drew heat up from the South.
Not exact matches
The contiguous U.S. had its second hottest year on
record, according to NOAA, but with the remarkable
warmth experienced by Alaska factored in, 2016 would be the hottest for the country as a whole.
The World Meteorological Organization (WMO) reported that Europe
experienced its second warmest year, behind only the
record warmth of 2014.
Not all individual proxy
records indicate that the recent
warmth is unprecedented, although a larger fraction of geographically diverse sites
experienced exceptional
warmth during the late 20th century than during any other extended period from A.D. 900 onward.»