A very active line of thunderstorms associated with a strong cold front is pushing east into the New Orleans area this morning. A tornado watch has been issued for a band of Louisiana parishes and Mississippi counties along the thunderstorms, including St. James, Washington, Livingston, Tangipahoa, West Baton Rouge, Ascension, Assumptin, Iberville, East Feliciana and St. Helena parishes.

Strong line of thunderstorms, some severe, is moving into the New Orleans area Monday. morning. National Weather Service  

There's a good chance the watch will be extended east to include much of the New Orleans area later this morning.
Tornado  warnings have been popping up within this line of thunderstorms, with warnings recently expired for north central Livingston and southeastern St. Helena parishes, including  Montpelier and Greensburg; and in northern Washington Parish, including Franklinton and Angie.
A severe thunderstorm warning is in place for Livingston, St. Helena and Tangipahoa parishes until

Read more http://www.nola.com/weather/index.ssf/2012/12/severe_weather_possible_in_new.html