As a second atmospheric river takes aim at Northern California, the Sacramento office of the National Weather Service issued a Winter Storm Warning for Monday through Wednesday The warning was announced Sunday afternoon and will be in effect for mountainous areas above 5,500 feet. The post by the National Weather Service Sacramento office X account noted that the Winter Snow Warning would go into effect for Lassen Park and Western Plumas County at 10 a.m. Monday, with the warning expanding to include the Northern Sierra as of 1 p.m. The warning will remain in effect until 10 a.m. Wednesday…..