Record Western U.S. Snow Drought
Clarity for a changing planet — SustainabilityAwakening.com
A Threat to Western Agriculture
Shrinking snowpacks are cutting off vital irrigation water for farms across California, Idaho, Oregon, and Washington.
A 23% Decline in Snowpack
Driven by global warming, the Western U.S. witnessed a massive 23% drop in snowpack between 1955 and 2022.
Rain Instead of Snow
Warmer winter temperatures mean precipitation that once built mountain snowpacks is increasingly falling as rain.
Measuring the Melt
Scientists rely on mountain SNOTEL sites to measure Snow Water Equivalent (SWE)—the actual liquid water stored in the snow.
Finding the Normal
To define a snow drought, researchers compare current snow levels to a 30-year historical median for each river basin.
Beware the Daily Spikes
A single huge storm might push daily snow levels above 100% of normal, but that does not mean the drought is over.
The Peak Matters Most
The critical metric is the peak of snowpack. The total volume accumulated over the entire winter dictates summer water supplies.
The Cost to Crops
Without a strong snowpack peak, summer water deliveries for fruits, nuts, and vegetables are severely restricted.
A Systemic Shift
This isn't just a temporary dry spell. Snow droughts represent a permanent shift in the hydrology of the Western U.S.
Adapting to Less Snow
Securing our food systems requires rethinking water storage, efficiency, and conservation for a warming, snow-scarce future.