Boise, Idaho – A cold front sweeping into Idaho on Sunday is expected to bring scattered showers, isolated thunderstorms, and breezy winds across much of the state, raising travel and outdoor concerns for residents from the Snake River Plain to the mountain passes.
According to the National Weather Service in Boise, the best chance for rain will arrive late Sunday morning into the afternoon, with McCall, Stanley, Banner Summit, and Sun Valley seeing rain probabilities climb as high as 60 to 75 percent. Thunderstorms are most likely south of the Snake Basin, including Twin Falls, where storm chances reach 30 percent Sunday afternoon.
Drivers heading over Banner Summit and Tamarack Ski areas should prepare for slick roads and reduced visibility, especially during the midday hours. Boise, Nampa, and Meridian face lower rain chances—around 15 to 20 percent—but gusty west to northwest winds may follow into Sunday evening, impacting outdoor events and travel.
Residents are advised to keep devices charged in case of brief outages, secure outdoor items ahead of the winds, and allow extra travel time if heading into the mountains where heavier rain is possible.
Scattered showers linger into early Monday before drier conditions return. More advisories could be issued if thunderstorm coverage expands.
Five Day Forecast for Boise, Idaho
- Saturday: Isolated storms, 10–15% chance of rain, highs in the 70s.
- Sunday: Showers and storms likely midday to afternoon, breezy winds, highs in the 60s.
- Monday: Morning showers, then clearing, highs in the upper 60s.
- Tuesday: Mostly sunny, highs near 70.
- Wednesday: Dry and mild, highs in the low 70s.
