Tropical Storm Sandy Gaining Strength in Caribbean

Sam Champion tracks the storm as it is ready to make landfall in Jamaica.
3:00 | 10/23/12

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Transcript for Tropical Storm Sandy Gaining Strength in Caribbean
developing story we've been watching closely overnight. Tropical storm sandy gaining strength in the caribbean, ready to lash jamaica with 15 inches of rain. Setting her sights on the bahamas and possibly the east coast of the united states. Sam has been tracking it all morning. Good morning, josh. The initial concerns of 16 inches of rain, not just for jamaica, but also for cuba and possibly haiti, as well. Let's talk a little bit. And the best way to show this is on the 3d view. Watch the real development here just south of jamaica. With the big, powering clouds. Now, let's talk about what steers it. This storm system is on track. There's nothing to move it away from going across jamaica, right over cuba. At that point, it's a hurricane. When it gets by, friday into saturday, about 200 miles off the east coast of south florida, what happens here? There's some concern that between that area of high pressure and this moving front, it could get close to the east coast of the u.S. We could have a storm right in here. And that's worth watching. And a lot of folks have to have their eyes on sandy. We'll have them there so you won't be surprised by the storm.

This transcript has been automatically generated and may not be 100% accurate.

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