Residents across the Idaho Falls area and the broader Snake River Plain should prepare for a turbulent end to the week, with a Wind Advisory in effect Friday from noon to 9 p.m. and a significant increase in storm chances rolling through the weekend.
A Red Flag Warning also remains active for the southeast highlands through midnight Friday, signaling elevated fire weather conditions as gusty, dry winds persist across the region’s higher terrain.
Friday Brings the Strongest Winds
Thursday night will ease into the pattern gradually, with breezy conditions and gusts reaching around 25 mph overnight. Temperatures will drop to a low near 55°F. A 20 percent chance of scattered showers and thunderstorms is possible through Friday morning and early afternoon.
The afternoon is where the wind picks up in earnest. Sustained speeds of 23 to 28 mph are forecast Friday afternoon, with gusts peaking near 38 mph. The daytime high will reach approximately 79°F before conditions deteriorate further into the evening.
Friday night carries a 50 percent chance of showers and thunderstorms, with sustained winds of 13 to 18 mph and gusts up to 39 mph. Overnight lows will fall to around 50°F.
Residents planning outdoor activities this weekend — including those attending the Meadowlark Music Festival at the Ashton Opera House — should keep a close eye on conditions as the storm system develops.
Weekend Brings Heavy Rain Chances and Cooler Air
Saturday is shaping up to be the wettest day of the stretch. A 90 percent chance of showers and thunderstorms is expected Saturday morning, accompanied by sustained winds of 13 to 20 mph and gusts that could approach 30 mph. The high will reach only about 65°F — a drop of roughly 14 degrees compared to Friday.
Saturday night brings a 30 percent chance of additional showers, with overnight lows dipping to 41°F. Higher elevations across the region can expect snowfall as the colder air settles in.
Sunday offers some relief but not a full break, with lingering shower chances keeping the unsettled pattern in place through at least the early part of the new week.
The active stretch comes just as Idaho Falls Power crews have been out working on the River Walk corridor during Public Power Month — conditions worth watching for any outdoor infrastructure or community events.
What Comes Next
Residents and travelers should monitor National Weather Service updates through the weekend as the system evolves. The Wind Advisory and Red Flag Warning reflect rapidly changing conditions, and forecasts could shift as storm timing becomes clearer. Those in higher elevations should be prepared for snow accumulation and reduced visibility. For the valley floor, the primary concerns remain strong wind gusts Friday afternoon and the heavy rain probability Saturday morning. Outdoor plans through Sunday should be made with flexibility in mind.