Figure1_LaNina_precipitation_Dec-Jan_obs_WUS.png

Average December–January precipitation anomalies (percent of the 1991-2020 climatology) for all La Niña events from 1951-2020, defined as La Niña occurring in December–February. Places where precipitation was less than the 1991-2020 average are brown; places where precipitation was above average are blue-green The white box defines the Southwest U.S. region (32° - 40° N, 109°-125° W) that is the focus of further investigation. NOAA Climate.gov image, based on precipitation data from NOAA’s Precipitation Reconstruction over Land (PREC/L).