Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

December 2022 was certainly historic in several ways. For Duluth alone, several daily snowfall records were broken, and with an inch of snow that fell on December 31, the monthly snowfall record was broken as well. Elsewhere, below normal temperatures and above average precipitation and snowfall was the overall trend, which is consistent with patterns we normally see during a La Niña pattern. With all the added moisture, Lake Superior is sitting at about a foot above average and drought conditions have improved a bit more across the region.

For the rest of January, the CPC is forecasting above normal temperatures and precipitation. Equal chances to perhaps below normal temperatures are favored in the 3-month outlook with above normal precipitation.