the north and extending toward the great lakes and mid-atlantic, packing plenty of rain and potentially damaging winds. >> heavy rain has been falling in jacksonppi. where a flash flood watch will be in effect at least through this afternoon. the system has torn through a lot of texas. storm chasers grabbed video of this land spout. and the streets of san antonio could be turned into rivers, crippling traffic. accuweather meteorologist, paul williams joins us now with what's to come. paul, good morning. >> good morning, diane, kenneth. well, we're looking for thunderstorms, severe thunderstorms to advance, with this front pushing through, causing havoc throughout louisiana, mississippi, alabama, tennessee, arkansas, even up towards kentucky. we're watching out for damaging hail, winds in excess of 65 miles per hour, 75 or worse and then widespread flash flooding. but, first of all, tornado threat in effect throughout louisiana, mississippi and in the afternoon for mississippi, going into alabama along i-10, particularly along i-20. then the big problem is widespread flooding that will reach down to houston along the coast of texas, louisiana,