2018 Global Weather Instability Deepens, La Nina Strengthens

Alex Wierbinski's picture

By Alex Wierbinski - Posted on 11 December 2017



Global Weather Instability

La Nina Strengthens

Second La Niña Winter Could Extend Drought Across the West,
Water Deeply, December 11, 2017.

We’ve been tracking this La Nina through last Winter, and adjusted our seasonal outlook colder and drier as it deepened.

Last year's La Nina did not dampen last year's record snow, while the dry Winter of 2015 was accompanied by the most powerful El Nino every recorded.
Thus, we can say that the link between La Ninas inducing cold dry Winters and the relationship between El Ninos with wet warm Winters have both been completely thrust aside over the last seven seasons.

We've literally seen the super-dry 2015 Winter happen during a monumental El Nino, and the super wet Winter of 2017 happen during a La Nina. It appears our atmospheric dysfunctions are overwhelming the atmospheric effects that these regular oceanic temp oscillations would normally have.

These are not normal times.

Nonetheless, I'm sticking with, and streghtening my assesment that we will have a cold, dry Winter this year. The last reports of South Pacific temp anomaolies, which is the third link below, are epic. Right now, today, that is one huge, super-powerful La Nina.

I've been watching a vast, huge, persistant High pressure zone operating in the NE South Pacific for the last six months. I assign the strength of this year's La Nina to the strength and endurance of that persistant high, sitting between Peru and Hawaii.

That High has been moving South with the shifting position of the Sun, which has refreshed and supercharged its accompanying La Nina.

I mostly track weather activity across the Pacific as it moves East towards the Sierra Nevada, but we do have to keep an eye on the SSTs (sea surface temps) in the South Pacific off the coast of Peru. Highs and low temps there can have profound effects on weather up here, up high in the High Sierra, and across the whole West Coast of the U.S.

Last La Nina Report
9 November 2017 El Nino & La Nina Report

Tracking the Fall into Winter of 2018

All El Nino & La Nina Resources

On the Weather Page
Weather Resources

All High Sierra Forecast Zones

All Precip Predictions

High Sierra Weather Resources



December Trail News


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