Tropical Storm Francine's path toward the Louisiana coast will bring it over warm Gulf of Mexico waters, typically a key factor for turning a modest storm into a powerful hurricane. But another factor ...

JACKSONVILLE, Fla. — Wind shear is brought up often during tropical forecasting because it can make or break a storm. It's one of the most critical factors when talking about the formation or ...

Tropical Cyclone Winston has moved into an area with strong vertical wind shear in the Southern Pacific Ocean. The wind shear is battering the storm and has weakened it significantly. NASA’s Aqua ...

Pattern showing how vertical wind shear (VWS) varies in the Atlantic. When shear is abnormally low in the tropics, it is abnormally high along the US coast. The lower dashed box shows the tropical ...