Over 100 scientists and engineers from multiple DOE national laboratories and universities, including PNNL, contribute to the creation of a new Earth modeling system—the Energy Exascale Earth System Model.

Mesoscale convective systems (MCSs)—intermediate-scale thunderstorm clusters lasting up to about 24 hours—are important precipitation producers. They account for 30-70 percent of warm-season (April to August) rainfall between the Rocky Moun