Dry January means less water than normal in California snow

Dry January means less water than normal in California snow
A vehicle is stuck in the snow along Brunswick Road and Sutton Way in a snow storm, Dec. 27, 2021, in Grass Valley, Calif. After a stormy December and a dry January, California water resources authorities conduct the season's second survey of snow in the Sierra Nevada. The state water board will also give an update on how Californians are doing on Gov. Gavin Newsom's call for a 15% reduction in water use. Credit: Elias Funez/The Union via AP, File

The water contained in California's mountain snow is now lower than the historical average after a January without significant rain or snow—a dramatic reversal from December that demonstrates the state's challenges in managing its water supply.

Snow totals updated Tuesday by the state Department of Water Resources show the amount of in the Sierra Nevada mountain's snowpack is at 92% of what's normal for this date. In December, heavy rain and snow left the state with 160% of its average snow .

"Our climate is experiencing these volatile shifts form wet to dry year after year, and even month after month," said Sean de Guzman, manager of the department's snow surveys and water supply forecasting section.

The extremely wet December followed by a dry January was strikingly similar to previous months, which included a very wet October followed by a dry November.

De Guzman spoke from a location near Lake Tahoe where the state periodically measures snow pack. Snow totals there were slightly higher than average, indicating the varying conditions across the state. It's one of hundreds of locations where the state manually and electronically measures snow totals and water content.

The whipsaw effects of the weather and precipitation were illustrated by the situation on the Nevada side of Lake Tahoe in Reno, which had zero precipitation the entire month of January for the first time in recorded history. That came months after the city experienced its wettest October since the National Weather Service began keeping records in 1893.

Dry January means less water than normal in California snow
Sean de Guzman, chief of snow surveys for the California Department of Water Resources, right, places the snowpack measuring tube of a scale held by DWR's Anthony Burdock, center, as DWR's Andy Reising, left, looks on during the second snow survey of the season held at Phillips Station near Echo Summit, Calif., Tuesday, Feb. 1, 2022. The survey found the snowpack at 48.5 inches with 19 inches of snow water content. That's 109% of the historical average at this time of the year. But statewide, the water in the snowpack is 92%. Credit: Kenneth James / California Department of Water Resources via AP

California needs a wet winter to ease the drought because much of the state's precipitation typically falls between December and March. Most of California is now in what's considered severe drought according to the U.S. Drought Monitor, with only a small part of the state classified as being in the more serious extreme drought. That's a significant improvement over the situation a year ago.

Winter snow is a crucial part of California's water supply and December through March are typically the wettest months of the year. Snow that melts in the mountains and runs down into California's makes up about a third of the state's water supply.

As of now, the water content in the is at 57% of the April 1 average, a key measurement data that indicates how much water the state will have from runoff in the spring and summer.

"That one dry month of January basically wiped out whatever we had as we head towards the end of winter," de Guzman said.

  • Dry January means less water than normal in California snow
    In this photo provided by the California Department of Water Resources, snow melts into a creek flowing into the South Fork American River, near the where the California Department of Water Resources held the second snow survey of the season at Phillips Station near Echo Summit, Calif., Tuesday, Feb. 1, 2022. The survey found the snowpack at 48.5 inches with 19 inches of snow water content. That's 109% of the historical average at this time of the year. But statewide, the water in the snowpack is 92%. Credit: Kenneth James/California Department of Water Resources via AP
  • Dry January means less water than normal in California snow
    Anthony Burdock, left, and Sean de Guzman, chief of snow surveys for the California Department of Water Resources, check the depth of the snow pack during the first snow survey of the season at Phillips Station near Echo Summit, Calif., Dec. 30, 2021. After a stormy December and a dry January, California water resources authorities conduct the season's second survey of snow in the Sierra Nevada. The state water board will also give an update on how Californians are doing on Gov. Gavin Newsom's call for a 15% reduction in water use. Credit: AP Photo/Randall Benton, File

Meanwhile, officials at the State Water Resources Control Board announced Tuesday that Californians met Gov. Gavin Newsom's call for a voluntary 15% reduction in water use for the first time in December, thanks to the heavy precipitation. Overall people used 16.2% less water compared to the December before. Still, cumulative savings since Newsom made his request in July sit at just 7.4%, officials said.

E. Joaquin Esquivel, chair of the water board, called the December conservation numbers "incredibly impressive" and said they demonstrate that people are being more mindful of their water use during wet times. The state board recently adopted mandatory water restrictions including a ban on watering lawns within 48 hours of a rainstorm, but that rule wasn't yet in effect in December.

But he stressed that continued conservation is necessary as dry conditions have returned.

"We're looking to hopefully get a few more storms this water year, but the storm door may be closed," he said.

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