U.S. space agency NASA has predicted more violent storms and tornadoes for the United States as the global warming continues to make the earth's climate warm.

The latest forecast was predicted by a new climate model developed at NASA's Goddard Institute for Space Studies by researchers Tony Del Genio, Mao-Sung Yao and Jeff Jonas.

"The strongest thunderstorms, the strongest severe storms and tornadoes are likely to happen more often and be stronger," Associated Press quotes Del Genio as saying.

It is not only the first successful NASA model to simulate the observed difference in strength between land and ocean storms but also the first to estimate how the strength will change in a warming climate.

The new study published on August 17 in the American Geophysical Union's Geophysical Research Letters says U.S. will be the most likely spot for tornadoes and severe storms in spring and summer.

Predicting more lightning and bigger hail, the study also forecasts danger for the Western United States with an increase of about 6 percent in the lightning attributed mainly to a surge in carbon dioxide- the chief global warming gas.

Researchers have also predicted that some regions would have less humid air in a warmer climate and be more prone to wildfires as a result. "These findings may seem to imply that fewer storms in the future will be good news for disastrous western U.S. wildfires," said Del Genio.

"But drier conditions near the ground combined with higher lightning flash rates per storm may end up intensifying wildfire damage instead," he added.