Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 213 AM EST Sun Nov 24 2024 Valid 12Z Sun Nov 24 2024 - 12Z Tue Nov 26 2024 ...Heavy Snowfall for parts of the Sierra Nevada... ...Above average temperatures spread from the central U.S. into the East while cold airmass descends into the Great Plains... A weak low pressure system will continue directing a plume of moisture at the West Coast over the next few days. This will likely result in coastal and low elevation rain, while moderate to heavy snow proliferates across the coastal ranges of Washington, Oregon and California. The heaviest snowfall is likely to occur over portions of the Sierra Nevada, with the southern Sierra poised to accumulate 2-3 feet with isolated higher amounts. Snow showers will also impact the Colorado Rockies over the next few days. Heavy rain and snow chances increase on Tuesday as another atmospheric river event arrives across parts of central California. Relatively zonal flow across the southern tier of the country will support another day of above average temperatures for the Central/Southern U.S. today. An upper trough will pickup steam over the northern tier and send a strong cold front diving south through the Great Plains over the next 48 hours. Highs in the teens will represent 20-30 degree departures from normal over the Northern High Plains through Monday. Temperatures will drop precipitously, from highs in 60s and 70s today to 40s and 50s on Monday over parts of the Southern Plains as the cold front propagates through. The associated warm front will spread mild air across the Eastern U.S. on Monday before the cold front arrives and drops temperatures for the rest of the week. Kebede Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php