01 · Snow
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Big number: snow water equivalent (SWE), the water you'd get by melting the snowpackDeep: measured snow depthPrecip: total since Oct 1, rain and snow
11,580′ Black Mesa
6,950′ Dolores gauge
02 · Headwaters
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Touch or hover the chart to read it.
Below Rico (high country)Everything else above DoloresNWS forecast
6,924′ full pool
03 · McPhee Reservoir
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Storage
—af
Space to fill
—af
Projected
—af
Gained since yesterday
—af
This storm
Touch or hover the chart to read it.
Daily average storage, Colorado DWR station MCPRESCO. The shaded floor is the 152,000 af inactive pool; the top line is full pool.
04 · Will it spill?
Drag the spring runoff and watch the lower river.
100%
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Spill volume
—KAF
Boating days at ~1,200 cfs
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Likely fill thresholdYour scenarioPast years, approx.
Your assumptions
These drive the projection and the spill model. Edits save in this browser only.
Great Cut Dike
05 · Out to the fields
Most of the Dolores leaves through the side door, into the San Juan basin.
The Dolores Project serves about 61,660 irrigated acres: full service around Dove Creek and Towaoc, supplemental water for the Montezuma Valley. A full supply is 22 inches per acre. 2026 was one of the worst seasons on record.
4,943′ Bedrock gauge
06 · The lower Dolores
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Boating bands · log scale
800–1K minimal1–1.2K good1.2–3K prime3K+ swift, few eddies