One of those huge reservoirs, Lake Oroville, has risen more than 20 feet since the series of storms began last week, but the Department of Water Resources website showed it was at just 27% of capacity Tuesday. Soils were so dry and temperatures were so warm that the water instead was soaked up or evaporated, and reservoir water storage fell to shocking levels. Then, in a stunning development, about 80% of the predicted runoff never appeared. "While this is a great start to the water year and much needed, it is a reminder that our wettest months (historically) are still ahead and are crucial that we get rain and snow in those months and throughout the year to really help end the drought," Anderson wrote in an email. State climatologist Mike Anderson said the October precipitation (rain and snow) " makes up about 20% of a water year's expected total" - that is about 20% of the total precipitation that the region gets on average across an entire water year that runs across 12 months from Oct. The index pulls data from eight locations spread across the northern part of the mountain range. The California Department of Water Resources uses the Northern Sierra 8-Station Precipitation Index to help measure the size of the snowpack and determine the status of water supply. READ MORE: Atmospheric river dumps snow across Tahoe, nearly setting new record #cawx #snow /azV2znpYTZ- NWS Sacramento October 26, 2021 Snowfall amounts up to 3 feet were reported. Here are some snow totals for the recent storm over the northern Sierra.
"It really doesn't tell us much about how the rest of winter will go." "Definitely impressive snowfall for late October," said Hannah Chandler-Cooley, a forecaster with the National Weather Service's Sacramento office. Winter arrived early in California's mountains when a potent storm barreled across the region Sunday into Monday, delivering significant snow fall - nearly three feet to higher elevations above 7,000 feet above sea level - across portions of the northern and central Sierra.
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