textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Windy conditions through this evening, particularly across south central Idaho where gusts up to 50 mph are expected. - Mostly dry this weekend with a warming trend through Sunday.

- Windy conditions could return for Monday and Tuesday behind a dry cold front.

SHORT TERM /Through Saturday Night/

Issued 245 AM MST THU MAR 5 2026

Post frontal environment remains active early this morning with scattered light showers across southwest Idaho along with gusty winds in the Western Magic Valley. Overall, showers have produced little additional precipitation or snowfall this morning with snow levels down to near 3000 feet MSL. The primary concern today continues to be gusty winds. Strong northwesterly flow aloft will mix down to the surface, especially from Mountain Home east through the Western Magic Valley and southern highlands. A Wind Advisory remains in effect for these areas through this evening, as gusts up to 50 mph remain possible. Elsewhere, breezy conditions will persist through the afternoon before winds begin to decouple after sunset.

Temperatures today will be notably cooler, running 5 to 10 degrees below yesterday's highs. While most valley locations will remain dry under a clearing sky, lingering moisture and upslope flow will keep a 20 to 30 percent chance of light snow showers over the central Idaho mountains through this afternoon. Accumulations will be minimal, generally less than an inch.

By Friday, an upper level ridge begins to build over the West Coast, shifting our flow to the north-northwest. This will usher in a drier air mass, leading to a quiet and cool day. High temperatures will hover near or just slightly below normal for early March. The ridge shifts further east on Saturday, allowing for a warming trend to begin. However, a weak shortwave moving around the top of the ridge will bring an increase in high clouds throughout the day. Otherwise, the region can expect a dry start to the weekend with temperatures returning to 5 degrees above normal.

LONG TERM /Sunday through Thursday/

Issued 245 AM MST THU MAR 5 2026

Sunday will be the warmest day of the long-term period, as high pressure over the north Pacific extends eastward over our area. Temperatures on Sunday will be 5-10 degrees above normal under partly cloudy skies. Clouds will begin to increase come late Sunday as the ridge begins to flatten out, ushering us into an unsettled pattern.

Come Monday into Tuesday, guidance remains consistent on a cold front working it's way across our area. With limited moisture, precipitation chances will increase to 30-75% across the central Idaho mountains; here, the terrain will help enhance lift and therefore precipitation. Snow levels Monday morning will be at 6.5- 8kft MSL, before dropping to valley floors behind the front. But again, moisture is limited so the only expected accumulations will fall in the central Idaho mountains. While precipitation is limited, gusty winds will be the other mentionable impact with this front. While Monday afternoon will be gusty, the strongest winds will come Tuesday afternoon. Mountain Home eastward will have a 70+ percent chance of seeing gusts greater than 30 mph Tuesday afternoon, with the Camas Prairie having a 70% chance of seeing wind gusts of 40+ mph. Have adjusted winds/wind gusts towards the NBM 75th/90th percentile. Temperatures come Tuesday will be leaning below normal following the front.

Beyond Tuesday, our area will sit under unsettled northwest flow aloft. This will give way to precipitation chances of 30-65% across our mountain zones through Thursday. A warming trend will also set in Wednesday into Thursday.

AVIATION /18Z Thursday through Friday/

Issued 1044 AM MST THU MAR 5 2026

Generally VFR with MVFR ceilings over KJER-KTWF. Ceilings should improve by 19Z. Showers will linger over SW ID this evening, bringing a 30% chance of brief MVFR/IFR conditions and mountain obscuration. Snow levels will be around 3-4kft MSL today, lowering to near valley floors overnight. Localized LIFR/IFR conditions are expected in patchy valley fog and mist near mountain terminals overnight. Surface winds: W-NW 10-20 kt with gusts to 30 kt except W-NW 25-30 kt with gusts to 45 kt in the Lower Snake Plain. Winds aloft at 10kft MSL: NW 20-40 kt.

KBOI...Showers in the vicinity of the terminal today, with a 30% chance of MVFR/IFR conditions in a brief rain-snow mix over the terminal this evening. Surface winds: W-NW 10-20 kt with gusts to 35 kt by the afternoon.

Weekend Outlook...Localized LIFR/IFR conditions in patchy valley fog each morning. Showers over terrain Saturday resulting in possible MVFR/IFR conditions. Otherwise, VFR with mostly dry and clear conditions. Snow levels: 3.5-5.5kft MSL Sat/AM rising to 6.5-7.5kft MSL by Sat/PM. Surface winds: W-NW 5-15 kt with gusts to 20 kt in the Magic Valley Sat/PM, variable up to 15 kt Sun/PM.

BOI WATCHES/WARNINGS/ADVISORIES

ID...Wind Advisory until 8 PM MST this evening for IDZ014>016-028- 030. OR...None.