|Projected path of Cyclone Mahasen as of May 14, 2013|
Mahasen is being pushed to the northeast by a trough of low pressure. There are heavy thunderstorms, largely out over water around the southeastern coast of India. MODIS images on NASA's Terra satellite showed that (as of May 14) it was a tightly wound, compact storm with strong convection around the storm center. it is moving about 8 mph to the northeast (as of May 14). Sea surface temperatures in the Bay of Bengal are near 84-86 F, warm enough to support the tropical cyclone, and vertical wind shear is minimal, allowing the storm to potentially strengthen.
NASA has released an image (lower right) on which someone has sketched atmosppheric gravity waves traveling out from the center of the storm. This suggests that the core of Mahasen extends up into the stratosphere. Gravity waves transfer the momentum from the stratosphere back down into the troposphere as the system seeks to regain density equilibrium.
|Gravity waves (marked with circle and arcs) from|
Cyclone Mahasen NASA image