The most important snowpack survey of the season in the Sierra Nevada was recorded Tuesday at 161 percent of the historic average, the fourth best reading in 40 years and good news for the entire state.

California’s water supply for the next year is almost in ideal shape, and the rainy season isn’t over, with yet another atmospheric river storm forecast to arrive Friday.

“With full reservoirs and a dense snowpack, this year is practically a California water-supply dream,” Department of Water Resources Director Karla Nemeth said in a statement. “However, we know our long-term water supply reliability cannot rely on annual snowpack alone. It will take an all-of-the-above approach to build resiliency for the future.”

State water officials consider the annual April 1 snowpack reading in the Sierra Nevada to be the most important of the year for planning summer water supplies across California. The April survey typically takes place when the snowpack is at its deepest and the water content, a key indicator for water supply, is at its highest for the season, according to the DWR.