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Rough winds ahead
Two atmospheric rivers expected to hit area this week
weather
Rain, snow, flooding and landslides are all possibilities across the state from two atmospheric rivers expected to hit California this week (Image courtesy of the National Weather Service).

Did you enjoy the spring-like weather over the past couple of days? Hope so, because it’s going to look a lot like winter again as not one but two atmospheric rivers are expected to broadside California in the coming week.

Monday reached a high of 73 degrees — two degrees off the all-time high for the month of January in Turlock — and Tuesday topped out at 71 degrees.

That’s about to change.

“An atmospheric river is a long, condensed moist air mass,” said Chelsea Peters, a meteorologist with the National Weather Service in Sacramento. “And they can differ in magnitude depending on how much moisture. It’s essentially a river in the sky.”

Rain, snow, flooding and landslides are all possibilities across the state. For Turlock, a high-wind advisory goes into effect on Tuesday and lasts until Wednesday morning, with winds expected to reach as high as 45 mph.

“Winds are a pretty big concern for this first system,” said Peters. “Winds of 40 to 55 mph are forecast across Central Valley, with the brunt of that affecting the Sacramento Valley. Modesto/Turlock are on the lower end of that, with 30 to 40 mph, maybe as high as 45 mph, but definitely on the lower end of the wind spectrum.”

The NWS expected that the rains would have arrive by late Tuesday night.

“The bulk of heavy moisture and rain and snow are expected Wednesday to Thursday,” said Peters.

The first system is expected to bring 1 to 3 inches of snow, but primarily above 6,000 feet elevation. The second system, which is expected to arrive Friday and be a bigger problem for Southern California, will be a bit fiercer.

"Because the second one is coming off a cold system, snow levels will be heaviest above about 4,500 feet,” said Peters. “But we could see maybe 1-4 inches down to 3,500, and perhaps some flurries in the foothills.”

The silver lining in these rainclouds is, of course, the effect on California’s years-long drought.

Overall, when the storms have run their course, the Sierra Nevada could accumulate anywhere from 3 to 7 feet of snow.

Last year, more than 99 percent of the state was facing at least some level of drought, according to the U.S. Drought Monitor. After last year’s historic precipitation levels, less than 4 percent of the state is considered “abnormally dry,” which is the USDM’s lowest level of drought observance. The rest of the state is completely drought-free.

The Department of Water Resources said that statewide snowpack is 8.4 inches, or 52 percent over average, with storms so far this year being warmer and producing rain instead of snow at higher elevations. The state's snowpack last year was at 214 percent of the norm.

Monday’s high of 73 was an all-time high for Jan. 30 in Turlock —and Tuesday’s high of 71 was a new record for Jan. 30 in Turlock. In fact, nine of the 10 hottest temperatures in Turlock for Jan. 30 have been recorded since 2009.