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Windward islands, the lesser antilles and eventually heading into puerto rico as a hurricane wednesday evening. let's talk about the ingredients we need. warm ocean water, temperatures in the mid to upper 80s. that's a check there. the wind shear, the upper level winds will increase over the next couple days so that won't bear well for this storm, which is excellent news. i think this is going to be what's going to inhibit significant develop here. that has changed. look at all the dry air around this system here. that also inhibits it. so, it has a lot to get through here before it intensifie...

Tsunami a wave 65 feet. 170 dead. 1,000 injured. it happened on saturday night as tourists and others were celebrating the holidays. here you see christians on the island attending a service. praying for the victims. residents who had homes are now opening theirs to those who don't. anita? >> anita: william, we keep hearing there was no warning for these folks. why is that? could there have been a warning? could they have gotten some notice so they could prepare? >> yes and no. so, there are two types of tsunami warning systems. one seismic monitors that detect earthquakes around the globe. th...

All the time, wind isn't what kills you. water is in hurricanes, storm surge. please, tom, explain to us the different aspect hereof dealing with the shelf, low-lying areas in terms of foot above sea level, but also the shelf, the continental shelf, why does that matter? >> okay, great question. big difference between the atlantic coast line on the outer banks and the gulf, all right. we do have a continental shelf off the carolina coast and we also have, you know, barrier islands. we have the inter coastal areas, something to protect the coast line. but the continental shelf on the gulf is mu...

Continental shelf in the gulf is much broader, much more of an area that the water is shallow. this is ivan, by the way, 2004, when they moved to the region the wave height grows with time. the tsunami last week following the earthquake in indonesia, the reason it was so high is the water went through a narrow area shaped as a submarine so the tsunami grew with time. there's the ivan you were talking about. this is dennis. ivan actually made three landfalls but dennis came through all west of panama city. to get more and talk about that surge, because i want to get back to history for you. we ...

Feet high. and behind that they have the houses on the beaches. and in north carolina, the building codes are very strict. same with south carolina. so you have to have the house on the stilts, on the pilings and on top of that. what you have to picture in this area of the 7 to 11 feet. you have the normal high tide and you add 11 feet to that. well, that's going to be over the top of the dunes. now maybe some of those houses are at the 7 to 11 foot height. but this doesn't even take into account the wave action on top of that. it's not like the ocean is going to be calm. we could see waves ra...