textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Above normal temperatures through the weekend.

- A weak cold front brings a slight chance of showers to Baker County and the west central Idaho mountains on Sunday.

- Significantly above normal temperatures develop next week, peaking Wednesday around 15 degrees above normal with potential record highs.

SHORT TERM /Through Sunday Night/

Issued 218 PM MST FRI NOV 6 2026 A generally quiet weather pattern will prevail across southeast Oregon and southwest Idaho through the weekend as a weak upper level ridge remains over the Great Basin. Patchy valley fog and low stratus remain possible Saturday morning in sheltered low- lying basins.

Mostly clear skies on Saturday will allow for strong surface heating, with afternoon highs climbing into the mid 60s throughout the Treasure Valley. Developing south to southeasterly winds will also aid in local warm air advection and boundary layer mixing, boosting temperatures to at least 15 degrees above normal for early November.

High and mid level clouds will increase Saturday night into Sunday as a weak shortwave trough and associated cold front track across the Pacific Northwest to our north. Moisture will remain largely limited to the northern tier, supporting around a 10 percent chance of light precipitation over Baker County and the West Central Mountains on Sunday. Despite increased cloud cover and the weak frontal passage, temperatures will remain unseasonably mild, topping out at least 10 to 12 degrees above normal across the region.

LONG TERM /Monday through Friday/

Issued 218 PM MST FRI NOV 6 2026 The area will continue to sit under broad west-southwest flow Monday through midweek. On Monday, a weak Pacific shortwave trough will pass over north-central ID, bringing small chances of precipitation over the northernmost mountains of our CWA late Monday into early Tuesday. Otherwise, a highly amplified Pacific ridge will build into the western CONUS Tuesday through Thursday, continuing dry conditions and temperatures 10 to 15 degrees above normal. Come Friday, there is general guidance agreement of an incoming upper low from the Gulf of Alaska digging into the Pacific northwest region, keeping our area under a strong southwest flow. There is considerable uncertainty over the arrival of precipitation over our area. For now, Friday will see slight chances of rain and mountain snow and the beginning of a slight cooldown.

AVIATION /06Z Saturday through Sunday/

Issued 1011 PM MST FRI NOV 6 2026

VFR and SCT-BKN mid and high clouds. A 10% chance of fog/low stratus developing near KBKE/KMYL Saturday AM. Surface winds: variable 8 kt or less. Then, E to SE 5-15 kt Saturday afternoon, with gusts to 20-25 kt in W Snake Plain and Baker County. Winds aloft at 10kft MSL: W to SW 10-20 kt. Areas of low-level wind shear Saturday night, mainly KBNO-KONO-KSNT and northward.

KBOI...VFR with BKN high clouds. Surface winds: SE 5-12 kt overnight through Saturday. Gusts around 20 kt developing Saturday afternoon.

Sunday Outlook...Mainly VFR, with SCT-BKN mid and high cloud coverage. Isolated showers and mtn obscuration across the north on Sunday, with snow levels around 7kft MSL. Surface winds: SE-SW 5-15 kt, shifting to W-NW 5-15 kt Sunday afternoon.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.