【听新闻练听力】Tornadoes touch down in Oklahoma

>> good even. we've had tornado on the ground tonight in oklahoma and the problem with this ferocious weather system grinding its way through the american midwest tonight is this. beyond what the good people of oklahoma are suffering throug forecasters are already warning of an extremely violent weekend. the kind of thing you don't often hear warned about in a forecast a day in advance. late today, the bad weather made itself felt in norman, oklahoma, home of the oklahoma sooners. outside of oklahoma city. initial reports after the first tornado touched down said there were no injuries. but again, this is sadly just the start forecasters are able to say with confidence tonight. it's thetart of a bad weekend ahead. dr. greg forbes is the severe weather specialist at the weather channel with us from their atlanta headquarters tonight. dr. forbes, i understand this is the second time since '03 that such an alert has gone out in this region this far in advance. two-part question. what's the situation tonight, and how can you say with such a high degree of confidence what's going to happen this weekend?

>> the situation tonight is we still have that same storm that has hit the norman area now producing another tornado. let me show you on radar. norman is in the lower left-hand kornder. it's going to the northeast. we had a report of a tornado near dale and clark heights. we are looking at the possibility of isolated tornadoes tonight. the red shaded area until ability 10:00 p.m. as we go into tomorrow, the ingredients get more favorable. the time until about 10:00 p.m., the lighter shaded red, anywhere from parts of south dakota and minnesota down across the central parts of nebraska and kansas and oklahoma, and even after dark over night, texas into central iowa. a tornado outbreak is likely. how we know this is that it's a pretty well defined surface low is forming. the gulf of mexico is pretty much wide open, the high pressure that had been giving drier air to the region has moved out and the disturb nls in the jet stream is blasting its way to the northern region. that's going to give tomorrow the severe weather threats. even up into wisconsin for april and down into texas. but for sunday, at least the tornado threat not as high, but it's a pretty high tornado threat tomorrow and there could be strong, maybe long-lived tornadoes as well.

>> joplin, missouri on the high risk map. the last thing they need. we'll keep an eye on the weather channel this weekend. thank you as always.