Dramatic Cooling

Here are plots of the temperatures in the lowest 1000 meters from the upper air sounding at Fairbanks from 3am AST Sunday and 3am AST Monday. While the surface temperature was only about 3C cooler Monday morning that Sunday morning, temperatures aloft fell much more: over 10C at 100 meters above the ground; the temperatures aloft are now as cold or colder than last week.

The NOAA-19 Polar orbiter infrared image from 5am AST Monday shows lots of cloud scraps across the interior but not much organized yet.