Idaho starts the morning with wet pavement, bending trees, and steady wind sweeping through the Treasure Valley. Umbrellas strain. Loose items slide. Conditions stay active for much of the day.
According to the National Weather Service in Boise, a Wind Advisory remains in effect until 5 p.m. across parts of southwest Idaho. West winds of 25 to 35 mph are common, with gusts reaching 55 mph at times. These gusts can make driving difficult, especially for trucks, vans, and vehicles towing trailers.
Rain continues early, keeping roads slick during the commute. Drivers should expect sudden crosswinds on open stretches of I-84, where lane control may become tricky through the afternoon. Tree limbs could come down, and isolated power outages remain possible.
Temperatures stay mild for December, climbing into the low 50s before easing back tonight. As winds gradually weaken, clouds linger. By Thursday, colder air edges in. Rain may briefly mix with snow, especially during heavier showers or at higher elevations. Accumulation looks limited for Boise, but the timing matters.
That warm-to-cold transition raises a familiar winter concern. Flash freezing can occur if wet roads cool quickly after sunset. Bridges and shaded streets tend to freeze first.
Looking ahead to Friday, December 19, unsettled weather continues. Rain chances return, and another rain-to-snow mix remains possible late. Meteorologists say this pattern hints at a more active winter setup heading into Christmas travel weekend. While major snow is not locked in locally, travelers heading toward mountain passes should stay alert.
What to do now:
Secure outdoor decorations. Use both hands on the wheel during gusts. Slow down on wet roads. Plan extra time if traveling later this week.
Five-Day Outlook for Boise, ID
- Today: Rain, very windy, high near 52
- Thursday: Rain with brief rain/snow mix, high near 48
- Friday: Rain likely, high near 53
- Saturday: Slight rain or snow chance early, high near 46
- Sunday: Rain likely, milder, high near 49
