Atmospheric ripples from Hurricane Helene spread far north of Florida as the devastating storm made landfall, new NASA images show ... gravity waves are vertical ripples that move through quiet ...

Cyclone Chido's hurricane-force winds devastated the small ... including warm sea surface temperatures of up to 84°F and low vertical wind shear. After passing just north of Madagascar on ...

Vertical winds are usually needed to make lightning happen. Irma has been downgraded to a category 4. But it's still "extremely dangerous." It has sustained winds near 155 mph. The hurricane has ...