textproduct: Boise

KEY MESSAGES

- Warm and dry Saturday, turning hotter Sunday as lower elevations could see first 90 degree day of the year.

- Heat peaks on Tuesday with temperatures 15-25 degrees above normal. Lower elevations will reach the low-mid 90s.

- Not as hot with a slight chance of precipitation in the mountains starting Wednesday.

SHORT TERM /Through Sunday Night/

Seeing some bands of mostly high clouds ahead of an upper trough moving into the Pac NW this afternoon. Dry conditions will accompany the trough and a surface front as it crosses the region tonight. The front will push through SE Oregon this evening, bringing wind gusts to 35 mph in the typically windier spots of northern Malheur and Baker counties. The front and winds will work through the lower-middle Snake Plain overnight, keeping it breezy as winds gust to 30 mph. Saturday will be the coolest day for most sites as the shortwave trough moves east and an upper ridge amplifies over central OR/WA. The warm air mass under the building ridge will shift into our region on Sunday, bringing an abrupt warmup. As winds become easterly, high temperatures on Sunday will push to 15-20 degrees above normal. This will put lower elevation sites near 90 and mountain valleys into the upper 70s.

LONG TERM /Monday through Friday/

Near record temperatures are anticipated this coming week, as high pressure builds in over the western United States. The warmest day of the week (and so far this year) looks to come Tuesday, with temperatures pushing 25 degrees above normal. It is worth mentioning that water temperatures will still be running cold, so consider taking extra precautions if participating in water recreation.

The pattern becomes less certain in it's progression after Wednesday. The bulk of the uncertainty lies in the progression of an upper-level trough, and whether or not it closes off into a low off the coast of California, or stays in the flow aloft and crosses our area. In either case, a southerly push of moisture will lead to slight chances of precipitation and perhaps even some thunder over higher terrain come Wednesday/Thursday. Temperatures will begin to trend cooler beyond Tuesday, becoming more seasonable by Friday.

AVIATION /18Z Friday through Saturday/

Issued 1110 AM MDT FRI MAY 8 2026

VFR. Surface winds: W-NW 10-20 kt with gusts to 20-30 kt this afternoon, Strongest near KTWF/KJER. Then variable 5-10 kt overnight, except W-SW 10-15 kt with gusts to 20-25 kt near KTWF/KJER. Winds aloft at 10kft MSL: W-NW 10-20kt.

KBOI...VFR. Surface winds: NW 8-12 kt with gusts to 20 kt this afternoon. Then NW 5-10 kt overnight.

Weekend Outlook...VFR. Surface winds W-NW 5-10kt with gusts up to 25 kt near KMUO/KTWF/KJER Saturday afternoon/evening, becoming SW-SE 5- 15kt Sunday. A cold front late Sunday will return NW gusts of 20-30 kt.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.