NASA satellite imagery has helped forecasters see that Hurricane Felicia is running into cooler waters and increasing wind shear, two things have taken her strength "down a peg or two." Felicia will continue to weaken further over the weekend as she heads to Hawaii where landfall isn't expected until late Monday or early Tuesday.

Conducting a rapid response research mission after Hurricane Ike, scientists at The University of Texas at Austin surveyed the inlet between Galveston Bay and the Gulf of Mexico, discovering the hurricane significantly reshaped the seafloor and likely carried an enormous amount of sand and sediment out into the Gulf.

All eyes are on where hurricanes make landfall, but the massive storms actually cause the most deaths inland, where severe flooding often surprises residents.

In the eye of a furious hurricane, the weather is often quite calm and sunny. But new NASA research is providing clues about how the seemingly subtle movement of air within and around this region provides energy to keep this central "powerhouse" functioning.