textproduct: Boise

KEY MESSAGES

- Freezing temperatures this morning. Not quite as cold, but still areas of frost Sunday and Monday mornings.

- Remaining unsettled into early next week. Temperatures will gradually warm toward normal by mid week, then above normal late week with drier conditions.

SHORT TERM /Through Monday Night/

A broad upper level trough will remain over the Pacific Northwest through Monday. This will keep our area cool with high temperatures around 5 degrees below normal. After widespread freezing temperatures this morning, low temperatures Sunday and Monday mornings will dip into the low to mid 30s in the Snake River Plain, resulting in areas of frost. Most of the energy associated with the trough will stay to our south and east, keeping significant precipitation amounts out of our area. The highest chance (20-50%) of precipitation today and Sunday will be over the higher terrain each afternoon. Chances will increase slightly on Monday as the trough axis passes overhead, bringing a 10-30% chance of showers to the lower elevations. A 10% chance of thunderstorms will accompany the stronger showers. Snow levels will range 4000-5500 feet through the period. Winds will be lighter today, but will be breezy Sunday and Monday with afternoon gusts 20-30 mph as the system moves through.

LONG TERM /Tuesday through Saturday/

An upper level trough will slowly exit the region Tuesday and Wednesday, keeping our area in northwest flow aloft. Thursday through Saturday, a broad upper level ridge is favored to build across the Pacific Northwest. However, a low potential for a trough to move into the region late in the week decreases forecast confidence. Overall, temperatures are expected to warm to around normal by Wednesday, then 5-10 degrees above normal Thursday through Saturday. A 20-50% chance of showers in the mountains and 10-20% chance in the valleys on Tuesday will trend lower on Wednesday. By late week, only a 10-20% chance of showers will remain over the mountains. Winds will be mostly light through the period with a few afternoon breezes.

AVIATION /06Z Saturday through Sunday/

Issued 1159 PM MDT FRI APR 24 2026

VFR with mostly clear skies overnight through early afternoon. SCT-BKN high clouds moving in during the afternoon/evening. Isolated mountain snow showers returning in the afternoon near KMYL and KBKE, with localized MVFR/IFR conditions and mountain obscuration possible in showers. Scattered showers near the NV border. Surface winds: variable less than 10 kt overnight through morning, then W-NW 5-10 kt in the afternoon. Winds aloft at 10kft MSL: NW 10-25 kt shifting to SW 10-20 kt in the morning after Sat/12Z.

KBOI...VFR with clear skies overnight through the morning. Surface winds: variable less than 6 kt.

Sunday Outlook...Generally VFR with localized MVFR-IFR conditions in scattered showers over high terrain in the afternoon. Low confidence of thunderstorms (10-20% chance) near the NV border. Mountains obscured at times in precipitation. Surface winds W-NW 5-15 kt with gusts to 25 kt.

BOI WATCHES/WARNINGS/ADVISORIES

ID...Freeze Warning until 9 AM MDT this morning for IDZ012-014-016. OR...Freeze Warning until 9 AM MDT /8 AM PDT/ this morning for ORZ064.