Weather & Climate How fog can form even when the sky above is perfectly clear
IntroductionFog can appear at ground level even when the sky above is perfectly clear because fog is a local phenomenon ...
Weather & Climate
Weather & Climate 
Weather & Climate Why some nights stay warm long after sunset
IntroductionSome nights stay warm long after sunset, leaving cities and countrysides feeling muggy even when the sun has...
Weather & Climate How a sea breeze can change the weather in just a few hours
IntroductionA sea breeze is a familiar coastal phenomenon that can noticeably change the weather within a few hours. Dri...
Weather & Climate The invisible currents that hold heavy droplets inside a cloud
IntroductionInside a cloud, small droplets and ice crystals hang suspended even though gravity pulls them downward. The ...
Weather & Climate How towering clouds build upward faster than you might expect
IntroductionTowering clouds—those dramatic, tall cloud masses that seem to explode upward—can grow much faster than peop...
Weather & Climate What causes freezing rain instead of snow or sleet?
IntroductionFreezing rain is a winter precipitation type that falls as liquid but freezes on contact with cold surfaces....
Weather & Climate What makes some clouds look like giant ocean waves?
IntroductionSome clouds occasionally take on the dramatic appearance of giant ocean waves frozen in the sky. Those wave-...
Weather & Climate How black ice forms on roads that look perfectly dry
IntroductionBlack ice is a thin, often nearly invisible layer of ice on roads that can form even when surfaces look dry....
Weather & Climate Why does the wind often get stronger before a storm?
IntroductionMany people notice a change in the air before a storm: winds pick up, clouds race in, and the atmosphere fee...
Weather & Climate What gives thunderstorm clouds their classic anvil shape?
IntroductionThunderstorm clouds often form a dramatic, flat-topped "anvil" silhouette that is familiar from weather phot...