Potential Category 4 atmospheric river to hit Northern California
Southern California experienced a drastic drop in temperatures on Monday, with wet weather expected through the week, while a powerful winter storm hit Northern California started late Monday and brought several inches of rain and heavy winds.
An atmospheric river, or a weather system that moves high concentrations of water vapor outside of the tropics, could on Tuesday bring up to 1 to 3 inches of rain to the coastal areas, with higher elevations receiving upward of 3 to 5 inches, the National Weather Service told CBS San Francisco. The atmospheric river could be as strong as a Category 4, with a scale that tops out a 5.
Accompanied by a medley of weather alerts, a surging jet stream pushed the powerful winter storm system toward California's Bay Area on Monday, CBS San Francisco reported. The National Weather Service issued a series of updated warnings targeting communities in the area, including a flood watch for cities like San Francisco, Watsonville, Pacifica, Santa Cruz, Scotts Valley and Boulder Creek. Those warnings took effect late on Monday night and are currently set to remain active through Tuesday afternoon.
By Tuesday morning, experts forecasted that significant runoff from surrounding mountain ranges could bring flooding to rivers, creeks, streams and low-lying areas, the weather service said in an advisory, adding that flooding could occur in urban areas as well as areas with poor drainage systems. Storm drains and ditches could become clogged with debris, the weather service warned.
https://www.msn.com/en-us/weather/topstories/potential-category-4-atmospheric-river-to-hit-northern-california/ar-AA15GZQ4
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Rained good and hard all night, good wind too. Now the snow is just starting to stick. Not quite and inch yet...
bleh, wet heavy snow is the worst~ good thing my son is visiting for the Holiday, he gets to shovel! 
https://www.aviationweather.gov/satellite/intl?region=i
Click on link to watch loop, button at top of viewer.
Home page:https://www.aviationweather.gov/satellite
For example, I think that loop has 15 hour points, but I'd like to see the prior 15 as well, or 30 or 50. Like an historical archive where you can select the time frame yourself? I'm sure it must exist somewhere. 
It takes me 6 hours to figure out how to adjust a setting on my tablet. I am lucky I can even get to the same site more than once. Some tech guru must know how to do it. I am a tech dummy. 
Great stuff Biden is doing with the weather. 
We now have real cold temperatures for winter. Translation: Blueberries will boom!
