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Fox News Weather Center

With ominous language, Storm Prediction Center calls for particularly bad storms in Oklahoma

Before the first thunderstorm even formed over Oklahoma, forecasters were using ominous language to describe violent weather they're expecting.

The Storm Prediction Center on Friday labeled a tornado watch as a "particularly dangerous situation," language set aside for the worst storm systems. Forecasters are predicting numerous tornadoes, including several strong ones. Hail could be the size of grapefruits — 4 inches in diameter.

Bad weather is also expected in parts of southeastern Kansas and southwestern Missouri, but meteorologists reserved the strongest terms for Oklahoma. No storms had formed by 4 p.m, but forecasters said that once they do, they're likely to become severe quickly.

The tornado watch area includes Moore, Okla., where 24 people died in a May 20 storm. The Oklahoma City and Tulsa are included, too.