shutting down roads and grounding all flights. cnn meteorologist chad myers is in the cnn weather center with our top story. how's it looking, chad? >> well it's going to continue for now, today and longer into the weekend. 46 tornadoes yesterday. debris launching into the sky. >> mike we have a roof that just flew through the air here. i don't know where it came from. >> tornadoing wreaking havoc yet again across the plains. >> large tornado north of verdon oklahoma. >> i got trees down power flashes, i got to back out of here. >> red cross and emergency personnel begin combing through the neighborhoods damaged or destroyed in oklahoma kansas and nebraska. >> i saw two clouds meet as one. and then we could hear the sound of a train. our ears started popping because of the air pressure. >> for the first time in history the national weather service declaring a flash flood emergency in oklahoma city.