Interesting update on the El Nino situation from the Hilltop Ranch website the other day. This is an extract from it:
....In California, officials have cautioned the public against imagining that El Nino will suddenly end the state’s chronic water challenges. Many experts say it would take an astonishing 2.5 to three times the average annual precipitation to make up for the rain and snow lost in the central Sierra mountain range over the last four years of drought. This is according to Kevin Werner of the National Oceanic and Atmospheric Administration, who is their expert on climate in the western United States. That amount far exceeds what happened in 1983, the wettest year on record for that region, when the area got 1.9 times the average annual precipitation.
California has been dry for much of the last 15 years. Even if California gets a wet winter this year, it could be followed by another severe multiyear drought. Another problem is that the Pacific Ocean west of California is substantially warmer than it was in 1997. That could mean that though El Nino-enhanced precipitation fell as snow in early 1998, storms hitting the north could cause warm rain to fall this winter. Such a situation would not be good news “for long-term water storage in the snowpack”. This comment is according to Daniel Swain, a climate scientist at Stanford University.
Drought officials prefer snow in the mountains in the winter because it slowly melts during the spring and summer and can trickle at a gentle speed into the state’s largest reservoirs in Northern California. Too much rain all at once in the mountains in the winter can force officials to flush excess water to the ocean to keep dams from overflowing. Swain said it’s important to keep in mind that all El Nino events are different, and just because the current El Nino has the potential to be the strongest on record “doesn’t necessarily mean that the effects in California will be the same.”
Drought Update- September 4
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Interesting update on the El Nino situation from the Hilltop...
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