textproduct: Boise

KEY MESSAGES

- Above normal temperatures continue through next week. Record highs are possible, with temperatures 10-15 degrees above normal. - A pair of weak systems will bring light rain showers to the area, one late Sunday north of a line from Baker City to McCall, and another areawide late Monday into Tuesday.

SHORT TERM /Through Monday Night/

Mild southwest flow continues as a strong upper level trough moves into western British Columbia tonight. The system will bring increased clouds and a slight chance of showers to an area north of a line from Baker City OR to McCall ID on Sunday. This system will provide enough mixing from southeast flow for mild temperatures to continue, with values in the low to mid 60s across the valleys. Monday will be dry as a shortwave ridge moves overhead, as another system moves across the NE Pacific into SE Alaska. A warm front will move across the Pacific NW and weaken on Monday, with a chance of showers areawide late Monday into Tuesday morning before drying out again. Precipitation amounts will be less than 0.10 inch.

LONG TERM /Tuesday through Saturday/

A ridge of high pressure will build over the region through the end of the work week. This will bring generally warm and dry conditions with above normal temperatures through Friday. Most locations will see high temperatures about 10-15 degrees above normal, near record daily highs. For example, Boise has a forecast high temperature of 67F, with the daily record near 71F. By Friday, a deep trough will split and produce a cut off low pressure system near California, with a strong atmospheric river poised to affect the OR/WA coast. Some of the cooler air and moisture from this atmospheric river will creep into eastern Oregon and southern Idaho by next Saturday. This will bring slightly cooler temperatures with valley rain showers and high elevation snow. Uncertainty remains in the track of the cut off low and the strength of the atmospheric river which creates ample variability in snow levels and forecast precipitation amounts. Current forecast shows temperatures creeping back 5 degrees above normal with a 20-40% chance of measurable precipitation in southeast OR and southwest Idaho, with higher potential over terrain.

AVIATION /18Z Saturday through Sunday/

Issued 1045 AM MST SAT NOV 7 2026

VFR. Incoming mid-level cloud cover later today ahead of a frontal passage tomorrow. Surface winds: E to SE 5-15 kt with afternoon 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 tonight, mainly KBNO-KONO-KMYL.

KBOI...VFR. Surface winds: SE 5-12 kt with gusts to 20 kt through the evening, then SSE 4-6 kt.

Sunday Outlook...Mainly VFR, increasing mid-level cloud coverage with a weak cold front passing over northern sites by the afternoon. Isolated showers and mtn obscuration near KBKE- KMYL, with snow levels around 7kft MSL. Surface winds: SE-SW 5-15 kt, shifting to W-NW 5-10 kt by the afternoon.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.