textproduct: Boise

KEY MESSAGES

- Cool and dry this weekend, frost and freeze possible this morning and Sunday morning.

- Seasonable temperatures with an unsettled pattern bringing a chance of rain and high mountain snow early next week.

SHORT TERM /Through Monday Night/

Dry conditions will prevail through Sunday thanks to brief ridging over the area. Clearing skies and calmer winds will allow for good radiational cooling this morning, with lower elevation lows in the low to mid 30s. This will be the case again come Sunday morning, although increasing high clouds may act to hinder frost development. High temperatures today will be near normal, before warming to around 5 degrees above normal come Sunday afternoon with increasing southwesterly flow ahead of the next system.

Come Monday, the brief ridging the made for a dry weekend will breakdown ahead of the next trough digging into the Mountain West. High temperatures on Monday will be similar to that of Sunday, if not a couple degrees warmer. Precipitation chances will increase through Monday with breezy (gusts to 20-30 mph, strongest south and west of the Snake River Plain) west/southwest winds. The most active period appears to come late Monday into early Tuesday, especially over the Central ID Mountains. This system won't have as much of a moisture tap as the prior one, with forecasted rain amounts under a half an inch over the Central ID Mountains. A cold front late Monday will lower snow levels to 5-6kft MSL, which will allow for some snow accumulations across higher terrain. Elevations above 6kft MSL in the Central ID Mountains have a 40-70% chance of seeing at least an inch of snow. The current forecast carries 1-3 inches above 6kft MSL (including Banner Summit), with up to 5 inches on the highest peaks.

LONG TERM /Tuesday through Saturday/

The cold front mentioned in the short-term period will cool temperatures back down again, with highs back down near to around 5 degrees below normal... Where they will likely remain through the week. The unsettled pattern will continue throughout the coming week, with a 10-30% chance of precipitation each day, mainly over higher terrain. The next notable storm system looks to approach our area late next week into the early weekend. However the moisture availability to for it to tap into is still questionable. At the very least, it should offer up another cool down.

AVIATION /06Z Saturday through Sunday/

Issued 1139 PM MDT FRI OCT 23 2026

Generally VFR with clearing skies from west to east. Patchy fog in sheltered mountain valleys through late morning. Surface winds: NW- SW 5-15 kt, becoming light and variable under 7 kt Saturday early morning through afternoon. Winds aloft at 10kft MSL: N 15-25 kt, becoming variable 5-10 kt Saturday morning.

KBOI...VFR with mostly clear skies overnight through morning. Surface winds: NW 6-11 kt, becoming variable or SE under 7 kt early Saturday morning through afternoon.

Sunday Outlook...Mainly VFR with clear and dry conditions through Sunday, except patchy morning fog/low stratus Sunday morning, mainly in sheltered mountain valleys. Surface winds: variable 5-12 kt.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.