Daily Climate: For California's highway managers, research showing a decline in the Central Valley's unique tule fog is no surprise.
The thick ground fog, an iconic weather feature that settles in the San Joaquin and Sacramento valleys during colder months, historically has been a bane to motorists.
Researchers have found a 46 percent decline in foggy days over the past three decades, helping motorists but potentially harming the state's valuable fruit and nut trees that depend on the cool and moisture the...