The heaviest snow of this multi-day storm is expected on Friday. Our KCRA 3 weather team is calling Friday and Saturday Alert Days, specifically in the Sierra, because of hazardous conditions that include several feet of snow, strong winds and travel impacts. You should not drive to the Sierra if you do not have to. Thursday through Sunday are Impact Days in the Sacramento Valley because of rain. Flooding is not expected, but there may be some ponding on certain roadways. Subscribe to KCRA on YouTube now for more: http://bit.ly/1kjRAAn Get more Sacramento news: http://www.kcra.com Like us: http://facebook.com/KCRA3 Follow us: http://twitter.com/kcranews Instagram: https://www.instagram.com/kcranews/