Forecasters warned today that more than two million people lie in the path of a series of storms that could produce an outbreak of violent, large-scale tornadoes across parts of Texas and Oklahoma, along with baseball-size hail, flash flooding and hurricane-force winds.

The warning, issued by the National Weather Service's Storm Prediction Centre in Norman, Oklahoma, forecast a "major severe weather outbreak" over parts of northwest Texas and western and central Oklahoma.

Numerous tornadoes, described by forecasters as "long-track, fast-moving and intense," were possible in the region throughout today and into tomorrow.

As part of the warning, the Storm Prediction