Colorado’s water year begins in the mountains, where snowpack serves as the state’s primary natural reservoir. Snow builds through the winter and remains stored on the landscape until spring, when it melts gradually and feeds rivers, reservoirs, groundwater, and communities across Colorado. That slow release is what sustains water supplies through the warmer months.
This year, that system is starting from a much lower point than normal. Statewide snowpack is currently around 22 percent of the 1991–2020 median heading into the typical peak period in early April. Winter conditions limited how much snow accumulated, and recent warm temperatures have reduced what was already a smaller snowpack. Together, those factors mean there is significantly less water stored in the mountains than Colorado would typically rely on at this time of year.
Snowpack is more than a winter metric. It is the starting point for how water moves through entire watersheds. As snow melts, that water flows through streams and rivers, recharges groundwater, and eventually reaches reservoirs and communities across the state. That same system supports drinking water, agriculture, local economies, ecosystems, and recreation, from headwater streams to downstream reaches.
When that starting point is lower, the effects carry through the system over time. Less water stored as snow can mean reduced runoff, lower river flows, and shorter periods of sustained water availability later in the season. Those changes influence how water is managed, how ecosystems function, and how people experience rivers across Colorado, whether that is on the water, along the banks, or in the communities that depend on it.
Current statewide data reflects this pattern clearly. Snow water equivalent has declined in recent weeks and remains well below average across all major basins in Colorado, with levels tracking below even the lowest historical years. Across all major basins in Colorado, snowpack is well below average, with even the highest basin well under half of normal and some basins below 10 percent of median. At the same time, drought conditions are expanding across the state, and some communities are already beginning to implement water use restrictions in response to limited supply. Snowpack, soil moisture, and drought are closely connected, and together they shape how the water year unfolds.
Spring plays an important role in what happens next. Snowpack typically reaches its peak in early April, and what remains on the landscape at that point helps determine how much water will move through rivers and reservoirs in the months ahead.
This year, the peak is not only lower than normal, it is also arriving earlier and declining more quickly. That shift in timing means runoff may move through the system faster, with a longer period of lower flows later in the season if conditions continue.
Additional precipitation and temperature patterns will still influence how the year develops, but both the amount of snowpack and the timing of its melt help define the range of outcomes.
It is easy to think about water in separate pieces, snow in the mountains, rivers on the landscape, or supply within communities. In reality, it is all one connected system. The same snowpack that feeds a headwater stream supports communities, agriculture, ecosystems, and recreation across Colorado. When there is less water stored at the beginning of the year, that change carries through everything that depends on it.
Colorado’s water story continues to develop through the spring and into summer. Colorado Trout Unlimited will continue to follow these conditions and share updates that connect snowpack, watersheds, rivers, communities, and recreation across the state. Understanding how water moves through Colorado is one of the most important steps in caring for the places and resources we all depend on.
