From solid to liquid and back again

You can easily walk across the sand on a beach. But step into a ball pit, and chances are you'll fall right through.

Five questions about tornadoes

May and June are typically peak months for tornadoes in North America. We asked Penn State meteorology professors Paul Markowski and Yvette Richardson to explain why tornadoes form, how to stay safe if you're near one and ...

Tropical Cyclone Ella wrapped in NASA imagery

Tropical Cyclone Ella has large bands of thunderstorms wrapping around the center and from the east of center in imagery from the NASA-NOAA Suomi NPP satellite.

NASA sees Tropical Cyclone Ella form near Fiji

The nineteenth tropical cyclone of the Southern Pacific Ocean season formed and is now threatening Fiji. NASA-NOAA's Suomi NPP satellite captured an image of the storm shortly after it developed.

NASA sees Tropical Cyclone Donna and Ella 'bookend' Fiji

This island of Fiji appears to be "bookended" by tropical cyclones in imagery from the NASA-NOAA Suomi NPP satellite. Tropical Cyclone Donna is west of Fiji and newly developed Tropical Cyclone Ella has developed east of ...

NASA sees Tropical Cyclone Donna blanket Vanuatu

The 80 plus islands that make up the nation of Vanuatu were blanketed by the clouds of Tropical Cyclone Donna when NASA's Terra satellite passed overhead. NASA's Aqua satellite provided an infrared look at Donna that showed ...

NASA sees vertical wind shear affecting Tropical Storm Muifa

Vertical wind shear can weaken a tropical cyclone and that's what's happening to the now weaker Tropical Depression Muifa in the Northwestern Pacific Ocean. NASA gathered rainfall information about the storm as wind shear ...

NASA sees the end of ex-Tropical Cyclone 02W

NASA-NOAA's Suomi NPP satellite spotted the remnants of Tropical Cyclone 02W southeast of Taiwan in the Northwestern Pacific Ocean as the system was dissipating.

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