The week started with extreme snow in the Sierra Nevada, where a powerful high altitude storm system brought more than 60 inches of snow to California’s highest peaks. Winds over 100 mph battered the Sierra Ridge as fee of snow piled high, sparking avalanche concerns and forcing the closure of Interstate 80. Visibility at time plummeted to near zero.
A new Climate Central report analyzes snowfall trends over the past fifty years, finding that snowfall has been decreasing in the spring and fall seasons across much of the U.S. but with clear regional differences.
The impact of climate change on snow can be a tricky story to tell. While warming winters would suggest that more precipitation will fall as rain instead of snow, a warming climate is also associated with increased precipitation which, in cold regions, can lead to an increase in snowfall. A new report from Climate Central aims to make sense of this challenging subject—analyzing snowfall data collected between 1970 and 2019 from 145 stations across the country.
Barely a week past summer, some Sierra Nevada peaks have received a dusting of snow — and a bigger accumulation is possible this weekend. The unsettled weather and brisker-than-normal temperatures that have lingered in the Bay Area this week brought hail and snow to the higher elevations of the Lake Tahoe area. The National Weather Service’s Reno office said that another wave of precipitation Friday night and Saturday could see an accumulation of 1 to 2 inches of snow at the higher passes, such as Tioga and Sonora. The greatest chance of snow showers at Yosemite’s Tuolumne Meadows is after 11 p.m. Saturday, the weather service said.
Forecasters are continuing to predict an El Niño this winter in the tropical Pacific Ocean. An El Niño Watch was issued earlier this summer in June. One of El Niño’s common “downstream” impacts is above-average winter precipitation across the southern United States, the result of a stronger than usual Pacific jet stream.
The Water News Network is San Diego County’s source for water news and information.
