BOULDER, COLORADO — A developing mountain wave event is pushing strong winds eastward out of the foothills Saturday evening, with gusts already reaching 40 to 75 mph just west of Boulder at elevations between roughly 6,500 and 7,500 feet.
Latest surface observations indicate that the reflection of the weak mountain wave is beginning to migrate downslope, bringing stronger gust potential closer to the Boulder and Rocky Flats areas.
75 MPH Gusts Observed in Colorado Foothills
Weather stations west of Boulder, including areas near Jamestown, Gold Hill, Crescent Village and Twin Spruce, have reported some of the strongest gusts so far this evening.
Red numbers on the latest map show peak gust speeds, with several stations recording:
- 68–70 mph gusts near Gold Hill
- Upper 60s near Crescent Village
- Widespread 40–55 mph gusts across higher elevations
These gusts are primarily concentrated along the immediate foothills corridor, where terrain-driven acceleration is most efficient.
Eastward Push Toward Boulder and Rocky Flats
Forecasters note that the eastward migration of this mountain wave could continue slowly over the next couple of hours…