Strong ridge of high pressure has taken control over the West producing some very intense inversions especially over the Northern Rockies. For us that means that the mountains can expect lots of sunshine and blue-bird skies with cold temps at night and warm temps during the day. Dense fog & stratus clouds will likely linger across the Snake River Plain and some valleys keeping temps a bit cooler.
Monday - morning fog and overcast skies can be expected for Snake River Plain. Highs near 30. Lots of sunshine with warm temps into the mountains with highs near 40.
Tonight - more dense fog will form especially across the Snake River Plain and some mountain valleys. Lows steady in the 10's and 20's. Clear and cold in the mountains with lows in the single digits.
Tuesday, strong inversions meaning warm and sunny in the mountains with temps in the 40's. Areas of fog and stratus layer keeping the Snake River Plain pretty gray with highs into the 30's.