BOISE, Idaho — On Thursday, skies started to look a little more hazy for parts of the morning and afternoon. And that view is expected to be even more shrouded tomorrow as a high pressure ridge, that's locking in the colder air closer to the surface and creating an inversion, strengthens. Even some of the mountain valleys have been looking a bit hazy. So, expect more of the hazy conditions across western areas to kick off the weekend.
The high pressure ridge is expected to start to weaken around Sat/Sun. Until then, we have very limited mixing in the atmosphere so the inversion will likely maintain it's grip. That's why there's now an Air Stagnation Advisory in place until 5 AM on Sunday. During this time, pollutants are trapped closer to the surface, but significant impacts to air quality are not expected.
A system coming in over the weekend will likely start to scour out these inversion conditions, with the full clearing closer to Monday.
Temps on Thursday afternoon got near 50 in the Treasure Valley and highs not too far off in the mountains as temps reach the upper 40s, low 50s.
High temperatures will trend upward slightly on Friday, though it will still be another bitterly cold start.
For the weekend, temperatures rise into the mid-50s in the Boise area, with plenty of sunshine but also some light valley rain and mountain snow possibly moving through overnight Saturday into Sunday. A much stronger, more potent low-pressure system will then make its way into the area on Monday, and is expected to bring a decent amount of moisture with it, which means chilly showers look likely on Veterans Day. Temperatures will be warm enough during the day to keep most of the precipitation as rain on valley floors on Monday and Tuesday, though with morning temps near the freezing mark Tuesday morning we can't rule out some snow showers in the Boise area and the Magic Valley.
For elevations above 6,500', next week's storm system could stack up 10" of snow - or more! Mountain valleys will see several inches as well from Monday through Tuesday, so expect winter driving conditions in the high country for Veterans Day and through mid-week. Some models are hinting at 1/2" of rain for some Treasure Valley spots next week but uncertainty is still high in the exact strength and timing of the system, so stay with KTVB for the latest.
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KTVB Weather Team
- Chief Meteorologist Rachel Garceau joined KTVB’s First Alert Weather team in early 2023 and was promoted to Chief Meteorologist in September of 2024. While Rachel started her news career behind the scenes as a producer, she eventually moved in front of the camera as a news anchor and fill-in weather anchor. After spending some time on the green screen, Rachel realized she had a passion for the “why” behind the weather, and especially for the challenges presented by forecasting Idaho’s four distinct seasons. You can catch Rachel's forecasts Sunday through Thursday evenings at 5, 6 and 10pm.
- Meteorologist Sophia Bliss has been a part of the KTVB team since December of 2019. She started producing for the Wake Up Idaho team and continues to work as a producer. Additionally, Sophia is a meteorologist. She writes special weather stories and forecasts as a member of the First Alert Weather team. She loves the science of weather and enjoys the opportunity to explain how “magic” of the science works.
- Weather Anchor Hector Mendoza joined KTVB in June of 2023 as a Multi Skilled Journalist and became a member of the First Alert Weather team shortly thereafter, in July of 2023. Hector started off as the weather anchor for KTVB's Saturday Morning News but rang in 2024 by also taking over weather duties for the News at Noon. Whether planning for the week ahead or just wondering what's in store for the weekend, Hector is excited to help keep Idahoans informed about the conditions that matter most to them. You can catch him on Saturday mornings from 8-10am and on the News at Noon Tuesday through Friday.
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