Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 1235 AM EST Wed Dec 25 2019 Valid 12Z Wed Dec 25 2019 - 12Z Fri Dec 27 2019 ...There is a Slight Risk of excessive rainfall over parts of Southern California today and Thursday... ...Heavy snow for mountains of Southern California... ...Well above normal temperatures for the central states... A cold front will approach southern California later today with an expanding area of rain and higher elevation snow. Embedded convection may enhance rainfall rates right along the coast from Santa Barbara through Los Angeles into San Diego. Snowfall over a foot is possible in the mountains in Los Angeles and Ventura counties. The precipitation will spread across the Colorado River on Thursday into the lower deserts of Arizona but with lower amounts toward the Phoenix and Tucson areas. Some modest snowfall is likely for northern Arizona along the Mogollon Rim. The rest of the lower 48 will see relatively dry and mild conditions with temperatures near normal along the New England coast but up to 25 degrees above normal in the mid-Mississippi Valley into the Great Lakes/Midwest. Some record highs are possible today and tomorrow. A frontal boundary will waver over the Central Plains through the Corn Belt and Great Lakes today and will lift northward on Thursday, spreading generally light precipitation (rain along the boundary, mix to the north, snow to the northwest) toward the east-northeast. Below normal temperatures are forecast for much of the West and especially the Southwest due to the incoming front. Expect temperatures only in the mid 50s to low 60s for southern California and the lower deserts of Arizona. Fracasso Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php