Atmospheric rivers are a plume of moisture that extend across the Pacific to near Hawaii. When they hit land they can cause ...

When water vapor cools sufficiently, it condenses into water droplets. Think of a cold can of soda on a hot day: water droplets appear on the outside because the thin layer of air surrounding the ...

They use the sun’s heat to evaporate water, leaving salt, bacteria and dirt behind. Then, the water vapor cools and returns to a liquid state, at which point it’s collected in a clean container. The ...

Heat also changes liquid water to water vapor (evaporation). As it cools, water vapor becomes liquid again (condensation). As it cools even more, liquid water becomes ice (freezing). Water molecules ...

If you look up on a clear day you will likely see man-made clouds somewhere in the sky, trailing behind jet aircraft high up in the atmosphere. Contrails, short for ...

This process is called evaporation. When the water evaporates, it leaves everything else in it behind. When the water vapor cools, it becomes liquid water again. This process is condensation. There’s ...

Earlier this week we broke down the complexities of mixed-phase precipitation forecasting.Within that we briefly touched on a key component to that complexity w ...

An atmospheric river is essentially a narrow band of Pacific moisture, water vapor, that is funneled into a long narrow flow.

This rises into the air. Cloud formation: The water vapor rises into the sky, where it’s colder. There, the vapor cools and turns back into small water droplets. These droplets gather and form clouds.

The weather phenomena are common for California winters, but they could cause dangerous debris flows or mudslides in recently ...

Southeast Texas has been experiencing persistent dense fog over the past several days, primarily during the late evening ...