El Nino

Questions and reports related to Sierra Nevada current and forecast conditions, as well as general precautions and safety information. Trail conditions, fire/smoke reports, mosquito reports, weather and snow conditions, stream crossing information, and more.
Cross Country
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Re: El Nino

Post by Cross Country » Tue Sep 15, 2015 4:34 pm

LA got it´s largest rainfall of the year (IN SEPTEMBER). I don´t ever remember that happening.

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Tom_H
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Re: El Nino

Post by Tom_H » Wed Sep 16, 2015 9:18 am

dave54 wrote:The New Years flood of 97 was a rain on snow event. We had a series of relatively cold storms in November and December, leaving an above average snow pack down to low elevations. Then a warm tropical storm hit around 12/31 sending not only the warm rain, but all the melted snow, downhill. Locally it was determined after the fact, when all the data became available, to be a 70 year event. IIRC, the snow pack never really recovered after that.
All of that is true. At the same time, it was a massive rainfall. There is no snowpack in the Lake Sonoma watershed. What was expected to be a 12 year fill occurred in 10 days, all from rain, no snow melt.

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