Valley inversions are the microclimate of western valleys this week as highs are only expected to reach the 20s and 30s. This is partly due to our upper-level pattern in place known as a Rex Block.

A slow-moving storm in Arizona will bring more scattered snow showers to the south, while valley inversions keep it hazy in the north. Much warmer this weekend with valley rain & mountain snow ...

Valley inversions will remain in place through Thursday, leading to low stratus and patchy fog for the Flathead and Mission valleys. Elsewhere, sunshine with highs in the 20s and low 30s.

Valley inversions will be the microclimate of western valleys this week as highs are only expected to reach the 20s and 30s. This is partly due to our upper-level pattern in place known as a Rex ...

High pressure with valley inversions will stick around for much of this week. We’ll see this pattern change just in time for the weekend. Overnight lows around -7° for The Snake River Plain.

A ridge of high pressure will maintain stable conditions, supporting valley inversions, strong cold pools, haze, and deteriorating air-quality. Valley stratus and patchy freezing fog are expected ...

MONTANA - Residents across Montana can expect a shift in weather patterns this week. The forecast indicates a warming trend, with temperatures rising above average by midweek. Daytime highs are ...

Boise, ID (CBS2) — A high-pressure system will be moving into the valley this week, according to the National Weather Service. With the high-pressure system comes another inversion and air stagnation ...

US-50 at Cave Rock, Lake Tahoe on Sunday morning. Snow will taper off early Monday, followed by dry conditions, valley inversion, light winds and colder morning temperatures through mid week ...

Skies were clear to partly cloudy. High pressure will dominate our weather through Thursday, bringing stronger inversions in the western valleys. That means fog and air stagnation will be increasing ...