Published on: February 11, 2009 at 1:06 PM

The NWS Birmingham has issued a severe thunderstorm warning for much of Blount, northern Jefferson and extreme northwestern St. Clair Counties till 1:30 PM CST

Storms have intensified from Clarence to west of Oneonta to Locust Fork to just east of Morris.

The stronger reflectivity indicates intensification and a greater ability to bring damaging winds to the surface.

Seek safety in a sturdy building or shelter now before these storms arrive.

Isolated tornadoes are also possible.