It's colder this Sunday morning across Fairbanks-land, and it's a deep cold. Here's a temperature trace from the early morning sounding. Unlike my usual fashion, this one is for the lowest five kilometers of the atmosphere. This is quite a cold troposphere: the warmest temperature in the entire atmosphere over Fairbanks is just -27.5C. Note too that the inversion right at the at the time of the sounding was not all sharp: the surface was only about 4C cooler than 400 meters up. Since then the inversion has sharped some as valley temperatures are now well down in the 40s below.
Some low temperatures reported so far (through 9am AST) include:
Fort Wainwright: 51 belo
Eielson AFB: 50 below
Goldstream Creek: 49 below (through 6am)
Fairbanks Airport: 48 below
UAF West Ridge: 42 below
Keystone Ridge: 28 below
Clearly Summit: 22 below
In the eastern Interior it's, as usual, even colder:
Chicken Co-op: 60 below
Eagle Co-op: 57 below
Fort Yukon: 56 below
Eagle Airport: 55 below
Dawson, YT: 54 below
Circle Hot Springs: 52 below
Northway: 51 below
