Dangerous Flash Flooding likely across Central/Southern California intoearly next week.Heavy Snow will cause extreme impacts over much of the Sierra Nevada onSunday and Monday.Anomalous warmth continues across Northern/Central Plains andUpper/Middle Mississippi Valley.A highly amplified upper-level pattern will support multiple sensibleweather hazards across the CONUS over the next few days. Moderate to heavysnowfall will continue across parts of the Northern/Central Rockiesthrough Sunday bef...