textproduct: Boise

KEY MESSAGES

- Scattered showers and isolated thunderstorms this afternoon and evening across east-central Oregon and high terrain in central Idaho.

- Hot, dry, and windy through the evening with critical fire weather conditions in the Owyhee Mountains and Magic Valley.

- Gusty winds along a cold front this evening. Breezy winds through the end of the week into the weekend, with the strongest winds on Saturday. - Temperatures fluctuate late this week into the weekend between 10 degrees above normal and slightly below normal.

SHORT TERM /Through Friday Night/

Light showers and overcast skies are covering most of southeast Oregon and high terrain in southern Idaho. Hot temperatures near 90F have been observed in the Upper and Lower Treasure Valleys, with some temperature moderation expected this afternoon with increasing clouds and colder air behind the front. Wind gusts will increase this evening and shift to the west, especially in the Lower Snake Plain. Red Flag Warnings are still on track for hot, dry, and windy conditions in the Owyhee Mountains and the Magic Valley, with single digit relative humidity values occurring near the Nevada border as of 1:30 pm MDT. Isolated thunderstorms (<20% chance) and showers will continue over northeastern Oregon and the West Central Mountains, with virga showers over southwest Idaho. Little to no rain is anticipated in the showers. Any stronger showers or storms that develop will bring outflow wind gusts up to 40 mph with blowing dust, but current forecast confidence is low and keeps that threat further to the northwest. Temperatures will cool off tomorrow by about 5-10 degrees, with highs in the upper 70s to low 80s expected in the lower elevations. As a ridge of high pressure quickly rebuilds over the region, temperatures will rebound back to about 10-15 degrees above normal on Friday, with very dry conditions. A strong upper level low over the Pacific will move onshore late Friday, bringing breezy conditions to southeast Oregon and the Snake River Valley on Friday afternoon into the evening ahead of a slight pattern shift for the weekend.

LONG TERM /Saturday through Wednesday/

A trough will move over the Pacific NW on Saturday and Sunday bringing breezy conditions to the area and cooler temperatures. Southwest Idaho and southeast Oregon will remain in the dry slot with this system. Temperatures cool around 15 degrees from Friday to around 5 degrees below normal Saturday and Sunday. Another system moves into the Pacific NW on Monday through Wednesday. Current forecast does not reflect this system but subsequent forecasts should show increasing chances of precipitation and cooler temperatures Monday through Wednesday.

AVIATION /18Z Wednesday through Thursday/

Issued 1203 PM MDT WED JUN 3 2026 VFR. Isolated showers and virga today. A slight chance of thunderstorms north of KBKE-KMYL. SW-SE surface winds SW-SE 5-15 kt with gusts to 25 kt this afternoon, then NW 10-20 kt with gusts to 30 kt this evening, strongest near KONO. Winds aloft at 10kft: SW 15-25kt, becoming NW 10-20kt Thu morning.

KBOI...VFR. SE winds 10-20kt this afternoon, shifting to NW 10-20kt this evening with a cold front.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.