An initiative of the Center for Environmental Journalism at the University of Colorado Boulder

Why atmospheric rivers can be both harmful and helpful

These "rivers in the sky" can cause catastrophic flooding but are also critical for the West's snowpack

What is an atmospheric river? A hydrologist explains the good and bad of these flood-prone storms...

On average, atmospheric rivers have about twice the regular flow of the Amazon River.

Helpful sites for tracking snow and the (subpar) snowpack

There’s no shortage of websites with maps and graphics visualizing snow forecasts and the state of the snowpack.

Staying safe with the Winter Storm Severity Index

This pragmatic tool from federal forecasters illustrates where snow, ice, and wind can be deadly and disruptive.

Scientists use simple cameras to answer complex questions about forests and the snowpack

“Snowtography” captures how the snowpack can vary dramatically across short distances

The fun is back at Blue Mesa and other reservoirs, as heavy winter snows...

Southwestern Colorado’s Blue Mesa Reservoir, drained by years of drought and a major release of water designed to aid a plummeting Lake Powell, is experiencing a rebirth this summer.

It’s all white: Colorado statewide snowpack tops 140%, though reservoirs still low

Drought in the West persists, but the increase in snowpack will likely allow for a significant recovery in reservoirs and soil moisture.

Epic snow from all those atmospheric rivers in the West is starting to melt,...

A meteorologist explains how 2023’s storms compare to past extremes and what to expect in the future.

Is the Western drought finally ending? That depends on where you look

Even a deep snowpack in the West likely won't be enough to end the drought.

Why rain on snow in the California mountains worries scientists

Professor Keith Musselman explains the complex risks rain on snow creates and how they might change in a warming climate.