textproduct: Boise

This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.

KEY MESSAGES

- Afternoon showers and isolated thunderstorms today and tomorrow in mountains and near the Nevada border.

- Gradual warming through Saturday.

- 20% chance of afternoon thunderstorms early next week.

SHORT TERM /Through Friday Night/

A cool upper level trough continues to bring unsettled conditions to the area. Showers will develop this afternoon across high terrain and near the Nevada border. A few showers could develop into weak thunderstorms, but may still produce small hail and locally gusty winds. Thursday is largely the same story, with showers and storms relegated almost entirely to central and southern Idaho. Temperatures will continue their steady climb, reaching the low 70s in the lower valleys by Thursday afternoon.

LONG TERM /Saturday through Wednesday/

The warming trend peaks Saturday at 10 degrees above normal, with lower elevations seeing afternoon highs right around 80 degrees. Temperatures hold steady at this mark through the long term forecast. This weekend, a trough amplifies into a cut off low and holds itself off the West Coast this weekend. There is still a 10% chance for precipitation in Southeast and East Oregon over the weekend, but model runs have held firm on a drier solution at this time due to the low being too far west. As the low moves inland, Sunday presents a slightly better chance of precipitation before the more significant chance Monday and Tuesday. 6 hour precipitation chances increase to 20-30% Monday and Tuesday, with a showery precipitation mode. In the afternoon, the chance of thunder increases to near 20%. Thunderstorms will produce heavy rainfall and strong wind gusts.

AVIATION /06Z Wednesday through Thursday/

Issued 1109 PM MDT TUE APR 28 2026 VFR with mid-high clouds. Scattered high terrain showers develop Wednesday afternoon and last into mid evening. 10-15% chance of thunderstorms with these cells. Snow levels 6000-7000 ft MSL. Surface winds: light and variable under 10 kt, becoming W-NW 5-15 by Wednesday afternoon. Winds aloft at 10kft MSL: W-NW 5-15 kt.

KBOI...VFR. Surface winds: light SE winds overnight, becoming NW 7- 12 kt Wednesday afternoon.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None.

OR...None.

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