textproduct: Boise
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- Mostly dry with temperatures warming through Friday.
- Well above normal temperatures over Memorial Day Weekend. Gusty winds and a few mountain showers on Memorial Day.
- Turning cooler with gusty winds and increasing chance of precipitation starting Tuesday.
SHORT TERM /Through Friday Night/
The cool upper level trough of the past several days will be briefly reinforced from the north today in MT and eastern ID, close enough to delay warming, and for a slight chance (10-20%) of showers in eastern Valley County and southern Twin Falls County late today and tonight. On Thursday the trough will exit east and steady warming and drying will take place. Hi-res models show light to moderate (10-20 mph) northwest winds this afternoon, then slightly stronger (15-25 mph with gusts 30 mph) Thursday afternoon, strongest in the Snake Basin southeast of Boise.
LONG TERM /Saturday through Wednesday/
The warming trend will continue through the weekend and peak Monday (Memorial Day) when high temps reach 85 to 93 in the valleys (hottest near Grand View, ID) and 70s to mid 80s in the mountains. By then flow aloft will become southwesterly and increase as a deep cold upper low approaches from the Gulf of Alaska. A strong cold front is now forecast for Tuesday, with the upper low forecast to pass directly over us on Wednesday. There are similarities with Tuesday's cold front to the one that occurred last week with the strong winds and blowing dust, so this event may become our main concern in the coming days.
AVIATION /06Z Wednesday through Thursday/
Issued 1159 PM MDT TUE MAY 19 2026 VFR. Scattered to broken middle and high clouds. Isolated rain showers in the central Idaho mountains and in southern Twin Falls County after 20Z. Surface winds variable less than 10 kt, becoming WNW 10-20 kt after 20Z. Gusts to 25 kt in the Snake Basin east of KBOI after 20Z. Winds aloft at 10kft NW 15-20 kt.
KBOI...VFR. Scattered to broken clouds AOA 15kft. Surface winds SE 5-10 kt, becoming WNW 10-20 kt after 20Z.
BOI WATCHES/WARNINGS/ADVISORIES
ID...None.
OR...None.
IMPORTANT This is an independent project and has no affiliation with the National Weather Service or any other agency. Do not rely on this website for emergency or critical information: please visit weather.gov for the most accurate and up-to-date information available.
textproduct.us is built and maintained by Joshua Thayer.