Western snowpack collapses
Colorado recorded its worst mountain snowpack since statewide records began in 1941, a blow that forecasters warn will strain water supplies across the West. (durangoherald.com). Reporters also flag a real possibility of record‑low runoff into Lake Powell this season, which would tighten reservoir access, river recreation plans and downstream trail conditions. (reviewjournal.com).
Colorado’s mountains usually work like a frozen savings account: snow piles up through winter, then melts slowly through spring and summer into rivers, reservoirs, farms, and city taps. In 2026, Colorado hit its worst mountain snowpack since statewide recordkeeping began in 1941, and the pack peaked about a month early with only about half the usual water in it. (durangoherald.com) The early peak matters because April is normally when the snowbank is still getting topped off. Instead, a March heat wave pushed melt ahead of schedule, and Colorado Public Radio reported temperatures running as much as 30 degrees above normal in parts of the state. (cpr.org) Snowpack is not measured by how deep it looks from the highway. Water managers track snow water equivalent, which is the amount of liquid water locked inside the snow, like weighing a sponge instead of eyeballing its size. (9news.com) That number is especially important in Colorado because the state’s high country feeds the Colorado River and several other major basins. When the sponge is light in the headwaters, the runoff that reaches Lake Powell, western farms, Front Range cities, and downstream states usually comes in light too. (durangoherald.com) Federal forecasters now have Lake Powell’s 2026 inflow looking alarmingly weak. The Bureau of Reclamation said in February that the most probable water-year inflow had fallen to 52% of average, and its April 6 Lower Colorado update cut that to 3.879 million acre-feet, or 40% of normal. (usbr.gov 1) (usbr.gov 2) The spring runoff picture is even starker. The Colorado Basin River Forecast Center’s April 2 forecast put April-through-July inflow to Lake Powell at 1.4 million acre-feet, just 22% of normal, which is the window when the reservoir usually gets its biggest snowmelt boost. (cbrfc.noaa.gov) (usbr.gov) Lake Powell is already low enough that small forecast changes matter. Reclamation said the reservoir ended February at elevation 3,531 feet with 5.90 million acre-feet in storage, about 25% of live capacity and 169 feet below full pool. (usbr.gov) That is why officials are talking about infrastructure, not just scenery. Reclamation said in February that the most probable 2026 path could bring Lake Powell down to 3,490 feet in December, which is below minimum power pool, the level where Glen Canyon Dam can no longer generate hydropower. (usbr.gov) The bad snow year is not spread evenly across the basin. A basinwide snow summary in mid-March showed some Upper Green sites near 84% of average snow water, while southeastern Utah sat near 22% and the San Juan headwaters near 47%, which helps explain why the southern half of the system looks especially stressed. (water-data.com) People around the reservoir will feel this long before any faucet runs dry. The Las Vegas Review-Journal reported that weak runoff can force marinas to adjust access, complicate river trips below Glen Canyon Dam, and leave side canyons and trails harder to reach as water levels sag through the recreation season. (reviewjournal.com) Colorado’s snow season is turning into a lesson the whole West already knows too well: a warm winter can erase water twice, first by building a smaller snowbank and then by melting it too fast. In a river system where April-through-July runoff has already been below the 1991-to-2020 average in five of the last six years, 2026 is shaping up as another year with almost no cushion. (cbrfc.noaa.gov)
