Both models suggest an increase in winter storms, and the Hadley model predicts wetter springs as well. Both suggest drier summers. That adds up to more water in the atmosphere which, in turn, leads to more thunderstorms. So, it's possible that the increased rain would be in sudden bursts rather than soaking drizzles. One of the most certain outlooks for the future, according to the report, is sea level rise.
Water expands as it is heated, and glaciers melt.
Sea levels in the Mid-Atlantic could rise 24 inches or more along the coast by the end of the century, inundating many coastal wetlands. Higher water will increase storm surges, causing more damage to coastal infrastructure such as buildings, roads and wastewater treatment facilities. The loss of coastal wetlands could impact a long list of species that depend upon them for food or shelter during different life stages, such as weakfish, black sea bass, striped bass, herring, spot, blue crab and horseshoe crabs. Because the models don't agree on future precipitation patterns, streamflow changes into the Bay are less certain, according to the report. If streamflow increases significantly, especially in the spring, as projected by the Hadley model, it could greatly impact the Chesapeake's water quality.