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State Water Board hears hydrology update: north–south precipitation split, diminished snowpack and risk of mid‑summer low flows in Scott and Shasta rivers
Summary
At its May 6 meeting the State Water Resources Control Board received a detailed hydrologic update: a pronounced north–south precipitation dipole, snowpack statewide at ~67% of normal, major reservoirs at or above average, but local declines in snowpack for the Scott River raise a mid‑July low‑flow risk for fish and possible curtailments.
A State Water Resources Control Board presentation on May 6 described a statewide hydrology pattern with more precipitation in the north than the south, a statewide snow water equivalent at about 67% of normal, and major reservoir storage generally at or above average — but with localized risks for summer low flows in northern tributaries.
Board staff reported that as of May 3 the statewide precipitation index was slightly above average in the Northern Sierra (about 111% of average) but below average in the San Joaquin (about 71%) and mixed in the Tulare region (about 87%).…
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