Photo: The American River in Northern California swollen with melting snow from the Sierra.

The barrage of storms that pounded the Sierra Nevada this winter and spring added up to a snowpack that’s massive. Amid a major heat wave all of that snow is now melting — and fast.  How fast? The snow level on Mt. Whitney rose 1,000 feet this week.

Read the San Francisco Chronicle Story

Read the Chronicle’s story on Mt. Whitney

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