By james art 
Bring rain facilities if you plan to do something outside this weekend as the atmospheric river is moving through the region. The atmospheric river is a narrow strip of moisture that moves from the Pacific Ocean. Usually they carry higher temperatures and a lot of wind with them. The level of snow will be high with this event, especially over the weekend. It will start about 6000-6500 feet on Friday morning in northern California, before rising to about 8000 ‘over the weekend. This means that there will be more rain than snow at the level of the lake on Saturday and Sunday. The valley will only see the rain, and the comb has the best chance of seeing snow. I-80 in Donner will be smooth from Snow on Friday before turning to rain for most of the weekend.
The total rains will range from at least a few inches to the level of the lake to at least half an inch in the valley. This will be a long -lasting storm, with many circles of heavy rain, carried early next week. By Thursday morning, the main concern will be to light on the roads, rivers and flows and burn scars. The Susan River is predicted to be close to the monitor stage until Monday, which is below the insignificant flood stage. Truckee is expected to remain below the monitor stage. The feather river is projected to near Monitor or even a minor flood stage and until Monday.
Now is the time to clear all the sewer or gutters included. If the snow level is slightly higher than expected, reaching 9,000 ‘, then the total rains would be much higher in Sierra and the hydrological prognosis will also be affected. Changing the snow level from one to two thousand feet will make a major change in the forecast.
The path of the atmospheric river is crucial in the forecast for this weekend. A slight fluctuation in the north with 200 miles would mean more wind than rain in the valley, but the path on the I-80 would mean soaking rain and less wind. The models tend to south in the I-80 with each running.
Burning scars, including over Davis’s burning scar, will be something to watch flows from debris this weekend. The degree of rainfall will not be as intense as thunderstorms, but the rain will be heavy and stable.
The wind is another thing to watch this weekend, especially on Sunday. It will be windy this weekend, but Sunday will have the major effects. Wind gusts will exceed 35 miles / h in the Truckee meadows on Friday and over 50 miles / h in areas prone to wind on Sunday. The impulses on our Ridgetops will exceed 100mph this weekend.
A fluctuation of the atmospheric river with 200 miles to the north would mean more wind and less rain.
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