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Fall weather will blow in overnight: Expect showers, mountain snow, wind and much cooler temps

The daily forecast from Idaho's largest, most experienced team of meteorologists.

BOISE, Idaho — Get ready for some big changes!  The warm weather is moving out, and Tuesday will really feel like autumn has arrived.  A large low pressure trough off the West Coast will move inland overnight.  "The winds of change" will be very active during the early morning hours, as a cold front moves through the region.

Expect wind out of the NW 20-30 mph, with gusts to 50 mph possible.  The strongest gusts will be felt south and east of Boise, down through the Magic Valley.  A Wind Advisory is posted for Malheur County and the Lower Treasure Valley from 11 p.m. tonight until 6 a.m. Tuesday, and for the Upper Treasure Valley and Magic Valley from 3 a.m. through 10 a.m.  

There will also be a round of showers moving through during the morning with the front.  It's only light precipitation for valley locations, maybe adding up to a couple hundredths of an inch (0.01"-0.05").  Mountain valleys may pick up closer to 0.20" of precip, and some wet snow could mix down to around 5,000-5,500'.  

Expect clearing skies during the afternoon, but a blustery NW breeze and much cooler temps.  Valley highs will be in the low 60s Tuesday -- that a 20 degree drop in temps compared to Monday's highs.

As the storm pulls away Tuesday night and Wednesday, expect clearing skies, but Wednesday morning will bring widespread frost in the clear, calm, and colder air.  In the Treasure Valley, temperatures will dip to the mid and upper 30's, with freezing temps in the mountains.  

Dry conditions will continue through the end of the week, with temperatures gradually warming closer to seasonal averages.  

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Credit: KTVB
KTVB's meteorologists are Rick Lantz, Larry Gebert, Bri Eggers and Jim Duthie.
  • Idaho's Chief Meteorologist Rick Lantz began his broadcasting career in 1975 working in both radio and television in Weiser, Caldwell, Nampa, and Boise. He has been bringing you the weather each weeknight for over 30 years on KTVB.
  • Meteorologist Larry Gebert began his broadcasting career in 1977 working for a radio station while he was completing his degree. He began working in television the following year in Montana before moving to Boise in 1983. Larry has been with KTVB since 1992 working as a meteorologist.
  • Meteorologist Bri Eggers joined the KTVB weather team in the fall of 2018. She became a meteorologist while working here in the Treasure Valley, and has earned her National Weather Association seal of approval. After spending four years in Boston, forecasting blizzards, nor’easters and humid summer days, Bri is excited to dive back into mountain meteorology. 
  • Meteorologist Jim Duthie has been a part of KTVB's weather team since August of 2008, but it's not his first experience with Idaho weather. Jim began forecasting on television in the Treasure Valley in 1998. Prior to coming to Idaho, he had extensive weather forecasting experience both in the private sector and in broadcasting.

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