Boulder's Chinook pattern makes winter commuting viable more days than most riders expect — know when to ride, how to spot ice refreeze, and what to wear.

Boulder's foothills can flip conditions 30°F in two hours — a practical two-stage guide to what to check before your morning commute and before the ride home.

How Chinook winds form along Colorado's Front Range and why Boulder experiences temperature swings of 60°F or more within 24 hours during foehn events.