Average May–July surface air temperature anomalies (° C) for (left) concurrent La Nina events, defined as La Niña occurring in the same May–July period, and (right) previous winter La Niña events, defined as La Niña occurring in the previous December–February. Anomalies are defined as the difference from the long-term trend, and all La Nina events from 1951-2022 are analyzed. When La Niña was underway from May–July, the western third of the U.S. was cooler than average (blue), while most of the rest of the country was warmer than average (red). The strongest warming (darkest red) was spread across the Upper Midwest. When La Niña occurred during the preceding winter (December–February), the warming signal was strongest over the Southern Plains. NOAA Climate.gov image, based on temperature data from GHCN CAMS.