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More late-week cooling to produce high-elevation snow

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So far September has been very mild in Boise, in fact the first 18 days were the 5th warmest on record for that time period. However, a major cool down is expected for the middle of the week as temperatures drop into the 60s.

Boise Temperature Trend

Another cold front moved through Tuesday afternoon keeping temperatures around 10° cooler than Monday. The main impact from the front has been to bring in some cloud cover and a breeze. Skies will be mostly clear Tuesday night allowing temperatures to dip into the low to mid 40s in the valleys, and 20s to 30s in higher elevations.

Tuesday Overnight Lows

A low pressure system dropping in from western Canada will send yet another cold front through the region on Wednesday. A gusty northwest breeze develops during the afternoon and into Wednesday night with sustained wind at 10-20 mph and gusts up to 30 mph.

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As the storm system meanders through eastern Oregon and southwest Idaho, scattered rain showers and very cool temperatures are anticipated - even some light snow for ridge tops above 7000 feet!

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