Yakima Basin Water Supply's April forecast - NBC Right Now/KNDO/KNDU Tri-Cities, Yakima, WA |

Yakima Basin Water Supply's April forecast

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YAKIMA, WA – The Bureau of Reclamation’s April 2017 Total Water Supply Available (TWSA) forecast for the Yakima Basin indicates that the water supply will fully satisfy senior and junior water rights this irrigation season.

“The overall Yakima Basin water supply has strong fundamentals right now; decent reservoir storage, a solid snowpack, and a well recharged ground water component,” said Chuck Garner, Yakima Project River Operations supervisor.

Reclamation will provide water supply forecasts monthly through July. Specific water delivery levels will not be determined until later in the year after reservoir storage begins to decline.

This forecast is based on flows, precipitation, snowpack, and reservoir storage as of April 1st, along with estimates of future precipitation and river flows. Other future weather conditions that determine the timing of the runoff and the demand for water also are critical in determining streamflows, prorations, and the extent to which the reservoirs fill.

“Precipitation in the last two months has made up for most of the shortfall earlier in the winter,” Garner said. “Snowmelt timing, summer weather, and irrigation demands are still important unknown factors that can influence streamflow levels and the carryover storage at the end of the season.”

If that spring precipitation and runoff are unfavorable, Reclamation still expects an adequate supply. Because longer term weather conditions can be unpredictable, Garner recommends water conservation always be considered by users in the Yakima Basin.

For more information, visit Reclamation’s website at http://www.usbr.gov/pn/hydromet/yakima.

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