textproduct: Boise

LONG TERM...Thursday through Monday

An unsettled pattern will develop through the period. A upper level ridge situated off of the west coast will begin to break down throughout the day Thursday. While the first shortwave Thursday morning lacks moisture to provide anything more than increased clouds, it will help flatten the ridge allowing for Pacific moisture to start streaming into our area behind it. This moisture advection will allow for increasing precipitation chances Thursday evening. Precipitation chances will increase to 10-20% in lower elevations and 20-60% in higher elevations (highest in the West Central Mountains) by Thursday night. Another shortwave is set to move across our area Friday/early Saturday, bringing the highest precipitation chances of the period Saturday morning. With chances increasing to 40-60% across lower elevations and 60-90% in higher elevations (per usual, chances higher in the West Central and Boise Mountains).

With the jet stream overhead, there will be multiple periods of precipitation into early next week as shortwaves come and go. While it is too far out to resolve the exact timing and strength, this pattern will support precipitation chances continuing into Monday. Snow levels will vary throughout the week, climbing to 5.5-7.5kft MSL late Friday. Beyond Friday, snow levels will trend down to 4.5- 5.5kft MSL come Monday. Temperatures will stay 5-10 degrees above normal throughout the period.

AVIATION

Mainly VFR. MVFR/IFR conditions this evening and Saturday morning in the central ID mountains with low ceilings and snow showers. LIFR conditions possible in snow. Isolated showers expanding across the area Tuesday morning. Snow levels: 2-4kft MSL. Surface winds: variable up to 10 kt. Winds aloft at 10kft MSL: NW 15- 25 kt.

KBOI...VFR under increasing mid to high clouds. A 20% chance of rain/snow mix after Tue/12z. Surface winds: Light and variable.

BOI WATCHES/WARNINGS/ADVISORIES

ID...None. OR...None.