A dense fog advisory was issued Tuesday morning, a couple of days before the major weather event of the week occurs.
The fog advisory issued around 2:30 a.m. remains in effect until 10 a.m. in the Sacramento region. Use low beams on vehicles and leave plenty of distance on the roads, the National Weather Service reminds morning commuters.
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A fairly strong weather system is predicted to bring heavy snow and significant rain beginning Wednesday night. The brunt of the storm is expected to hit on Thursday.
Snow levels are forecast to lower throughout the day on Thursday and could drop to the 4,000-feet elevation level by mid-to-late afternoon in the Sierra Nevada. Up to a couple feet of snow could fall along mountain passes, making travel on Interstate 80 and Highway 50 difficult.
A wide range is predicted in terms of rainfall for the Sacramento Valley: from a half-inch to 1.5 inches. From one to four inches or rain could fall in the foothills.
The detailed, 7-day forecast for the Sacramento region from the NWS:
Tuesday: Areas of fog before 10am. Otherwise, mostly sunny, with a high near 62. Light south southeast wind.
Tonight: Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 48. Calm wind becoming southeast around 5 mph in the evening.
Wednesday: A 30 percent chance of rain, mainly after 4pm. Patchy fog before 10am. Otherwise, partly sunny, with a high near 62. South wind 5 to 7 mph.
Wednesday night: Rain likely, mainly after 10pm. Cloudy, with a low around 53. South wind 7 to 13 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday: Rain. High near 59. Southwest wind 16 to 21 mph decreasing to 10 to 15 mph in the morning. Winds could gust as high as 26 mph. Chance of precipitation is 100%.
Thursday night: A 50 percent chance of showers. Mostly cloudy, with a low around 43.
Friday: A 30 percent chance of showers. Partly sunny, with a high near 56.
Friday night: A slight chance of showers. Mostly cloudy, with a low around 41.
Saturday: A slight chance of rain. Partly sunny, with a high near 56.
Saturday night: A chance of rain. Mostly cloudy, with a low around 41.
Sunday: Rain likely. Mostly cloudy, with a high near 57. Breezy.
Sunday night: A slight chance of showers. Mostly cloudy, with a low around 39.
Monday: A slight chance of showers. Mostly sunny, with a high near 57.