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.

LONG TERM...Wednesday through Sunday

By Wednesday, amplified upper ridging begins to impinge on the Pacific Northwest, resulting in a long fetch of cold northerly flow out Canada. This will bring some of the coldest temperatures of the season so far, with low-elevation highs topping out in the 40s, and overnight lows in the the teens and 20s in many areas through Friday. As the upper-ridge shifts overhead, the potential for an inversion and possible air stagnation issues also increases as well. Probabilities for a ridge breakdown increase into the weekend, along with increasing chances of precipitation.

AVIATION

Mainly VFR through this evening. Scattered rain/snow showers creating MVFR/IFR conditions through Sunday evening, mainly across eastern OR. Patchy fog/low cigs with MVFR/IFR possible early Tuesday morning near MYL, JER, TWF, and BNO. Mountains obscured. Snow levels 3500-4500 ft MSL. Showers increase Monday afternoon and evening. Surface winds: Gusts to 25 kt ending by early Tue morning, becoming variable less than 10 kt. Winds aloft at 10kft MSL: N 30-40 kt.

KBOI...VFR. Surface winds: variable up to 10 kt.

AIR STAGNATION

Stagnant conditions expected next Thursday through Sunday as a temperature inversion develops, with low mixing heights and light winds.

BOI WATCHES/WARNINGS/ADVISORIES

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


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