Using a combination of observations and models, NOAA-funded scientists have found a small but significant “advanced warning” signal for heightened summer tornado activity in the U.S.: warmer-than-average water temperatures in the Gulf of Mexico
A checkerboard of drought conditions has developed across the United States east of the Rockies between spring and summer 2016. Since March, the total drought-affected area of the country has nearly doubled.
A record-smashing hurricane season in the central North Pacific. Water rationing in Puerto Rico. The biggest one-year jump in atmospheric carbon dioxide concentrations. These and more of 2015's extreme events had one thing in common: El Niño.