A deep temperature inversion remains in place across much of the region, keeping clouds, fog, flurries, and very cold air trapped in the Treasure Valley, Weiser River Valley, Long Valley, Baker Valley, the deserts of eastern Oregon, and the Snake River Plain west of Twin Falls. Meanwhile most mountain locations in the south-central mountains are seeing sunshine with the cold weather. This pattern will likely hold through Wednesday.
Southeasterly winds will develop on Wednesday and Thursday, which will start to mix out the inversion, and a cold front moving through the region on Friday should finally mix out the cold air in the valley as we see a high temp finally touching 40.
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