textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Mild and dry Wednesday through early Friday. Near record high temperatures.

- Chance of precipitation returns Friday night, with additional rain and mountain snow, along with cooler temperatures, through the weekend into next week.

- Breezy winds this week, increasing and becoming windy Friday through Sunday.

SHORT TERM /Through Thursday Night/

Issued 311 AM MST TUE NOV 10 2026 Skies are partially clearing early this morning as a weak system moves east across the Idaho Panhandle. This will allow patchy fog to develop this morning. Otherwise, a weak warm front will lift north across the area today, producing clouds but no precipitation across the north. To the south, it will be mostly sunny today with highs several degrees warmer than Monday. Winds will be lighter today. An upper level ridge will amplify to our east across the interior western US Wednesday and Thursday while an upper level trough deepens in the eastern Pacific. This will bring mild temperatures, dry conditions, and breezy south to southeast winds. Highs will be 15-20 degrees above normal and near record highs each day, with lower valleys reaching the mid 60s to around 70F. Skies will be mostly clear with a few high clouds passing overhead.

LONG TERM /Friday through Tuesday/

Issued 311 AM MST TUE NOV 10 2026 A deep trough will approach the coast on Friday, increasing southwest flow across the area. It will become windy across the open terrain of southeast Oregon and far southwest Idaho with gusts 35-50 mph, and 20-40 mph elsewhere. Highs on Friday will remain near record highs, warmest across southwest Idaho. The trough will weaken as it moves inland, but will push a cold front across the area late Friday into Saturday with rain and high mountain snow. Precipitation chances will rise to 50-80% Friday night through Saturday morning, highest across the mountains. Rainfall amounts will be light in the valleys with light to moderate totals in the mountains. Snow levels will fall from 7-8kft MSL Friday evening to 6-7kft by Saturday morning, keeping snowfall confined to higher mountains. Winds will remain gusty on Saturday, but not as strong as Friday. Highs Saturday will cool 5-10 degrees.

A brief dry but continued gusty period is likely late Saturday into early Sunday as the first system moves east and another deep low approaches the coast. This next system will gradually move inland Sunday and Monday, bringing a 40-60% chance of precipitation to the area throughout the two day period. Chances will likely increase/decrease across narrower periods as confidence in timing and details rises in subsequent forecasts. Winds will slacken but continue to be breezy as the trough moves in and the surface pressure gradient weakens. Temperatures will remain similar on Sunday, then cool several more degrees on Monday as colder air arrives with the trough. Snow levels should also decrease to 4-6kft by Monday. Precipitation chances trend lower on Tuesday, but troughing overhead will keep conditions unsettled with temperatures cooling a few more degrees.

AVIATION /12Z Tuesday through Wednesday/

Issued 451 AM MST TUE NOV 10 2026 Mainly VFR. Mid to high clouds will decrease today. Patchy valley mist/fog this morning will result in localized MVFR-LIFR conditions, including near KBNO/KONO/KEUL. Surface winds: SE-SW 5-10 kt. Winds aloft at 10kft MSL: W 10-20 kt.

KBOI...VFR. Surface winds: SE 4-8 kt.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.