A day of sunshine will eventually turn south ahead of a wet Super Bowl week. In California, dangerous rain and snow may threaten lives, according to forecasters.
Rain was covering much of the valley on Thursday, and is likely to keep falling into the evening hours. Flight delays of more than 3 hours were slowing traffic at the airport.
Widespread rain should cover much of the valley on Thursday, especially in afternoon hours. Snow was expected to start before sunrise in the mountains.