Fog is essentially a cloud that forms at ground level. It develops when the air near the surface cools to the dewpoint, the temperature at which the air becomes saturated with moisture. When this ...

California’s Central Valley has spent the past several weeks buried under a thick, unmoving layer of tule fog — the dense, ground‑hugging haze that can turn I‑5 and Highway 99 into walls of white with ...

Recent scary pile-ups on highways in California have been blamed on tule fog, a specific type of fog that's native to the state's Central Valley. The recent huge, fog-related pileups in California ...

SIOUX CITY (KTIV) - While temperatures weren’t as warm as what we saw Monday, it was yet another very mild day across Siouxland with highs getting into the 40s. Skies will become mostly cloudy tonight ...