SPECIAL WEATHER STATEMENT – MULTIPLE STORMS THIS WEEK
Three storms through friday night will impact interior northern california. the first storm is moving into the region today and will bring strong winds with the frontal passage today. this first storm will bring a period of heavy rain to the valley and foothills with significant snowfall over the higher elevations. the winds will likely cause some downed trees and tree limbs that will also lead to some power outages.
The second storm will move into the interior on thursday and thursday night to bring another round of wet and windy weather for the interior and more snow for the higher elevations. this storm will be warmer than the first one with higher snow levels. the storm is not expected to have as much rainfall as the first one but is expected to bring significant snow to the higher elevations and wet heavy snow near the passes of i-80 and us-50. a third storm will move into the interior late friday and friday night. while this storm may not bring as much precipitation as the first couple of storms it will be a much colder system and will lower snow levels into the foothills. behind the front cold unstable air will remain over the interior to produce showers and thunderstorms through the weekend. in addition to the hazardous travel due to the snow the low snow levels may result in some power outages in the foothills.
Potential total rainfall amounts through this weekend will range from 2 to 4 inches in the central valley with the higher totals over the north and eastern sides of the valley....to 6 to 12 inches of rainfall for the foothills and mountains with the higher amounts expected over favored southwest facing slopes. locally higher amounts will be possible in both the mountains and foothills. because we have had a very dry winter so far small riers and creeks are running very low and are expected to handle the rainfall amounts expected this week. however...a few of the smaller creeks that typically have problems when there is a lot of rain may experience some minor overflow and the small rivers and creeks are expect to see a rise in the water levels...especially in the foothills. during periods of heavy rainfall ponding of water on roadways is expected along with possible flooding of the typical low lying spots.
Very heavy amounts of snowfall is expected over the higher elevations this week with delays and road closers likely at times over the higher mountain passes of the sierra nevada. in addition while the intensity in snowfall will likely decrease at times this week there is not expected to be much of a break for the western slopes of the sierra nevada. 6 to 8 feet of snow may fall above 8000 feet through this weekend.