Dennis Mersereau

Dennis Mersereau

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A major thunderstorm is about to blow over this vineyard.

Meteorologists convey the chance of cloud cover or rain in percentages, but what those numbers mean in the real world isn’t always clear—so you’ll often hear terms like ‘scattered’ and ‘isolated’ to describe thunderstorms.

Dennis Mersereau
Atmospheric rivers slammed Southern California in February 2024 and caused widespread floods and mudslides.

Explore the role of these weather systems in transporting moisture from the tropics and spreading it worldwide.

Dennis Mersereau
MarianVejcik/iStock via Getty Images

A hot and humid day can have a dramatic effect on both your comfort and your health. As millions of people around the world can attest to right now.

Dennis Mersereau
NOAA Legacy Photo ERL/WPL, Flickr // CC BY 2.0

Although they cover only a tiny area, the destruction can be severe.

Dennis Mersereau
iStock

Our everyday activities really are able to indirectly influence the weather in ways that go far beyond our addiction to greenhouse gases.

Dennis Mersereau
NASA

It's easy to forget that there are vast rivers of wind whooshing just a few miles above our heads at speeds that could put most hurricanes and tornadoes to shame, but jet streams affect us every day without our realizing it.

Dennis Mersereau