Stubborn fog across the Sacramento Valley could be troublesome for people with asthma

A steady stretch of nonstop fog over the last couple of weeks isn't just dampening moods in the Sacramento area. It may be taking a toll on physical health as well, and for people with allergies, the weather pattern could be making symptoms even worse.

For weeks, a thick blanket of fog has settled across the Central Valley, creating gray, chilly conditions and trapping irritants close to the ground. The culprit is a stubborn high-pressure system stretching hundreds of miles, keeping the fog locked in place.

CBS Sacramento's First Alert Weather Team has been monitoring the pattern closely.

"It's effectively keeping this layer of sinking warmer air above the cold layer we're in right now," said meteorologist Brian Scofield. "If you've been outside, it's frigid, and then we have this cloud