Utah snowpack emergency

Utah’s water year was already in trouble when March arrived. Then March all but erased what little cushion the state had left. On April 1, Utah’s mountain snowpack held just 2.7 inches of water on average, the lowest start to April since statewide records began in 1930, and far below the previous low set in 2015. Even after early-April storms, the statewide figure only climbed to 3.4 inches. This year’s peak, 8.3 inches on March 9, is now expected to stand as the lowest modern peak Utah has recorded. (ksl.com) That would be alarming in any Western state. In Utah, it lands with unusual force because snow is not scenery; it is storage. State officials say about 95% of Utah’s water supply traces back to mountain snow, which normally builds through winter and then melts gradually into reservoirs, rivers, farms, and city pipes. This winter ran hot instead. Utah had its warmest winter in more than a century, and March brought another burst of record heat across much of the West, pushing snow to melt early and fall as rain at elevations that usually stay white longer. (deseret.com) (ksl.com) The clearest sign of what that means showed up hundreds of miles downstream at Lake Powell. In early March, the National Weather Service’s Colorado Basin River Forecast Center projected that Powell would receive about 2.3 million acre-feet of inflow this runoff season, about 36% of normal. A month later, after the hot and dry March, that forecast collapsed to 1.4 million acre-feet, or 22% of normal. That is nearly 1 million acre-feet less water than forecasters expected just weeks earlier, and it would rank as the reservoir’s third-lowest inflow on record. (ksl.com 1) (ksl.com 2) An acre-foot is the amount of water needed to cover an acre of land one foot deep. It is also roughly what two or three households might use in a year, depending on where they live and how much they irrigate. So a drop of nearly 1 million acre-feet is not a bookkeeping tweak. It is a missing reservoir’s worth of spring runoff, and it arrives at a lake that was already about 25% full in early March. Forecasters now put the chance of Powell matching or beating the disastrous 2002 runoff season at about 30%, up from 10% a month earlier. (ksl.com 1) (ksl.com 2) Utah’s response has started to shift from watchfulness to triage. Salt Lake City reactivated its water shortage contingency plan in March, and Gov. Spencer Cox said he expected restrictions to spread across much of the state as summer approaches. On April 7, the Weber Basin Water Conservancy District went further, asking users to cut water use by 20%, delay outdoor watering until May 15, and stop by Sept. 15. Its managers said the decision was based on snowpack, precipitation, groundwater, and soil moisture all pointing the same way. (deseret.com) (ksl.com) The state is also trying to move water toward the place that has become Utah’s most visible measure of hydrologic stress: the Great Salt Lake. Utah’s Great Salt Lake Water Delivery Program was set up with as much as $53 million for projects including voluntary water transactions, conservation, and habitat work, with $50 million of that coming through the commissioner’s office in coordination with the Department of Natural Resources and the Bureau of Reclamation. The point is simple even if the law and plumbing are not: pay or help people use less water upstream so more of it reaches the lake. Utah’s own Great Salt Lake office said in January that conditions had stabilized but the lake remained below healthy levels and still needed urgent action. (greatsaltlake.utah.gov 1) (greatsaltlake.utah.gov 2) That makes this snowpack emergency easy to picture on the ground. Ski season ends with thin cover and fast melt. Reservoir managers try to save what they can. Rafters, anglers, and marina operators watch runoff forecasts instead of waiting for the usual spring surge. And at Lake Powell, the year’s likely inflow now sits at 1.4 million acre-feet, a number small enough to fit on a graph and large enough to redraw a summer across the Colorado River basin. (ksl.com)