textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Warm and dry through Monday. - Tuesday is hot with gusty winds likely.

- Remaining dry but not as hot starting Wednesday with gusty afternoon winds continuing.

SHORT TERM /Through Sunday Night/

Issued 230 PM MDT FRI JUN 12 2026 A weak front will kick through the region this evening bringing gusty winds to portions of e-central Oregon and the lower Snake Plain of Idaho. Gusts of 25-35 mph will impact Baker and northern Malheur counties in Oregon and the Weiser basin and along the Snake River in Idaho through about midnight. For the weekend, an upper ridge off the West Coast will keep our area under northwest flow. Dry and stable air aloft will cap any potential for precipitation development. Will see little change in temperatures from today to Saturday. More notable warming will show up on Sunday as the ridge axis reaches the coast.

LONG TERM /Monday through Friday/

Issued 230 PM MDT FRI JUN 12 2026 Guidance remains in agreement on synoptic pattern dominated by an upper-level ridge over Pacific and West Coast and broad low pressure over Canada. The boundary between these two systems is an area of drying, warming, and clear conditions with gusty afternoon winds. Monday and Tuesday climb several degrees each, with Tuesday being the warmest and driest day in the forecast. The Snake Plain and high desert of SW Idaho and SE Oregon will see afternoon high temperatures in the mid to low 90s on Tuesday. At the same time on Tuesday, a shortwave in the Canadian low skims our region and briefly strengthens the upper flow and surface wind speed. The current forecast has 30-40 mph gusts coincident with very hot temperatures and RHs in the 10s and single digits. This will lead to a potentially critical fire weather pattern, assuming the forecast holds firm. Later in the week, a close low amplifies and works into the ridge area dropping temperatures slightly from 15 degrees above normal on Tuesday to 5-10 degrees above normal Wednesday through Friday. Winds continue to gust 20-30 mph in the upper Snake Plain through this period, and as the low approaches the chance for thunderstorms along the NV border increases Thursday and Friday.

AVIATION /00Z Saturday through Sunday/

Issued 555 PM MDT FRI JUN 12 2026

VFR, few high clouds. Surface winds: NW 10-20 kt with gusts to 20-35 kt through early AM, then variable 5-15 kt rest of Sat AM. Becoming NW-NE 10-20 kt with gusts to 20-30 kt Sat afternoon. Winds aloft at 10kft MSL: NW-N 15-25 kt.

KBOI...VFR, few high clouds. Surface winds: W-N 5-15 kt. Gusts to 20- 25 kt will taper off around sunset and return Sat afternoon.

Sunday Outlook...VFR and passing high clouds. A few afternoon mountain cumulus. Surface winds: variable 5-15 kt Sunday AM, then NW- NE 5-15 kt with gusts around 20 kt in the afternoon.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.