December 17, 2002

El Niño Strikes Again

For the past couple of days, California has been pounded by a torrential storm. After a year with virtually no rain, the water tables and vineyard wells have been low. We need the rain; Ray Teldeschi told me last week that his vineyard in Dry Creek was "drier than popcorn". Checking the Healdsburg Weather Center, Dry Creek received over 18" of rain in 3 days.

In the short term, the rain is a good thing for the vineyards. If the intensity of the rain continues through next year, the 2003 harvest could be impacted. When Paul Draper, the winemaker at Ridge, wrote about the impact of El Niño on their 1998 Lytton Springs Zinfandel, saying it "..delayed the 1998 growing season by an entire month".

Today's SFGate reports that, this winter will be little El Niño compared to the legendary one in 1998. Here are some highlights from the article, El Nino joins long list of storm conspirators:

  • For the next three months, the Weather Service sees precipitation in San Francisco averaging 20 to 50 percent above normal.
  • This year's El NiÑo is nowhere near the monster of 1997-98 or some others of recent years.
  • Water temperatures at the equatorial surface are ranging 2 to 5 degrees Fahrenheit above normal

What is El Niño? What is its impact on the grapes?
Meaning "the child" in Spanish, El Niño refers to the baby Jesus and its typical Christmas season arrival. Warmer-than-normal sea temperatures and higher-than-normal water levels in the tropical Pacific lead to a change in weather patterns.

In an El Nino year, the trade winds blowing west from South America weaken, and a pool of warm water surges eastward across the equatorial Pacific. This affects storms in the central Pacific, which strengthen and feed strong, moist winds blowing toward North America.

It can impact the grape growing by delaying budbreak and bloom. Also, after drought years, the rain brings up the water table in many vineyard wells and springs.


Posted by Sasha on December 17, 2002 12:25 PM

Comments

I have heard that whenever there is an El nino that the wine vintage for the following year is supposed to be a superb vintage. I s this correct?

Posted by: Shawn on February 19, 2004 03:18 PM

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