Seasonable Fall weather cools dramatically into the weekend

A damp and chilly weekend expected with some of the coolest temperatures since Spring.
Posted at 7:30 AM, Sep 26, 2023

The work week started with an unseasonably warm afternoon as temperatures reached 90° in Meridian, 88° in Boise, and 87° in Mountain Home on Monday. On Tuesday, it warmed to around 80° in the valley with lots of sunshine while it remained partly cloudy in central Idaho with isolated shower.

A strong storm system off the northern Pacific coast will impact the area's weather throughout the rest of the week. A cold front moves through on Wednesday afternoon continuing to drop temperatures. It will be a partly cloudy day in the Treasure Valley with a slight chance of showers in central Idaho.

Closer to the weekend, the low pressure system moves into the region. An unseasonably cool air mass is anticipated for the weekend with highs struggling to reach 60° in the valley and 50 °in higher elevations. Scattered showers impact lower elevations, mixing with snow above 6000'. Some snow accumulation is likely in central Idaho in these higher elevations.