A wet weather system, accompanied by warm temperatures, has the potential to stall on Thursday over Northern California, but the rain may not fall all that much in Sacramento.
Today’s system has the potential to cause some flooding north of Sacramento.
The frontal system appears to be laden with water. The National Weather Service notes that “satellite-derived measurements of atmospheric moisture estimate the airmass at well above 200 percent of normal.”
The wet system, part of a series of weather systems, is expected to stall out as it moves south. The slow march of the system has the potential to drop heavy rain, but only along a narrow corridor.
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The corridor is projected to be centered along a line from Santa Rosa to Chico, according to the NWS. With the area already soaked from recent rains, forecasters warn of flooding.
It is unclear how much rain Sacramento will receive from the approaching system.
On Friday, the corridor is expected to turn in more of a north-south direction. This weather trough might split with most of it heading toward central and Southern California.
Northern California could get only light rain.
Then, a system is slated to arrive late Saturday with another wave Sunday. Both are likely to bring rain to the mountains, but the valley may be “rain-shadowed,” according to the weather service.
That means the greatest influence will be experienced over the foothills -- where creeks are already running high – and in the mountains where the snow level should be at the 5,000-feet elevations level.
The detailed, 7-day forecast from the NWS for the Sacramento region:
Thursday: Rain, mainly after 10am. High near 65. South southeast wind 6 to 11 mph becoming southwest in the morning. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tonight: Rain. The rain could be heavy at times. Low around 52. West southwest wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday: Rain. The rain could be heavy at times. High near 60. Southeast wind 5 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Friday night: A 50 percent chance of showers. Mostly cloudy, with a low around 45. South southeast wind 5 to 11 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday: Rain likely, mainly after 4pm. Mostly cloudy, with a high near 62. South wind 5 to 10 mph. Chance of precipitation is 60%.
Saturday night: Rain likely. Cloudy, with a low around 49. Chance of precipitation is 60%.
Sunday: Rain likely. Cloudy, with a high near 60. Chance of precipitation is 70%.
Sunday night: Rain. Cloudy, with a low around 50.
Monday: A chance of showers. Mostly cloudy, with a high near 61.
Monday night: A slight chance of showers. Mostly cloudy, with a low around 44.
Tuesday: Mostly sunny, with a high near 64.
Tuesday night: Partly cloudy, with a low around 44.
Wednesday: Mostly sunny, with a high near 69.