textproduct: Boise

UPDATE

Updated aviation discussion.

KEY MESSAGES

- Dry and slightly cooler Sunday, then several degrees warmer again Monday.

- A slight chance of thunderstorms along NV border today south of Twin Falls.

SHORT TERM /Through Tuesday Night/

Issued 338 AM MDT SUN AUG 23 2026 A weak cold front has moved through the area overnight, bringing drier air into much of the area. Isolated showers and thunderstorms across the Magic Valley and Boise Mountains this morning but will taper off in a few hours as the front moves east. Isolated thunderstorms will redevelop this afternoon across southern Twin Falls County, with gusty outflow winds possible. The ridge will strengthen over the area Monday and Tuesday with slightly warmer temperatures. A pair of weak shortwaves embedded in the southwest flow aloft will bring increased clouds on Monday and Tuesday. Isolated showers and thunderstorms will generally be confined to the higher terrain Monday afternoon and again on Tuesday afternoon. Thunderstorms will be capable of producing gusty outflow winds up to 50 mph.

LONG TERM /Wednesday through Sunday/

Issued 338 AM MDT SUN AUG 23 2026 Dry through the long term. A trough off the Pac NW coast pushes the monsoon moisture east on Wednesday with drier air, breezy conditions and slightly cooler temperatures Thursday through Sunday. Temperatures will around 2-5 degrees above normal through the period.

AVIATION /18Z Sunday through Monday/

Issued 1130 AM MDT SUN AUG 23 2026

VFR. Isolated thunderstorms south and east of KTWF this afternoon. Thunderstorms capable of outflows of 30-40 kt. Surface winds: W-NW 10-20 kt. Winds aloft at 10kft MSL: SW 10-25 kt.

KBOI...VFR. Surface winds: NW 7-12 kt with gusts to around 18 kt this afternoon.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.