High-pressure system lowers valley air quality

It might look like an inversion trapping smoke and dust in the Grand Valley air, giving a haze to views of Grand Mesa and Colorado National Monument.

In actuality, it’s just a high-pressure system that’s holding everything in place, a stability that will likely hold for about 24 more hours, according to the Grand Junction office of the National Weather Service.

Winds and unsettled air will sweep into the valley on Wednesday afternoon and sweep out the gunk that has collected in the valley, said technician Dan Cuevas.

The haze is made up largely of “locally produced smoke that is unable to escape” because it’s trapped by the high-pressure ridge, Cuevas said.

The weather service is forecasting a 40 percent chance of rain in the Grand Valley on Wednesday and Wednesday night, tapering off to a slight chance on Thursday and a mostly cloudy day on Friday.


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