NOAA Raises La Nina Chances For Fall

Posted on 03/09/2017 10:20 AM

The National Oceanic and Atmospheric Administration (NOAA) has raised the odds that La Niña will develop this fall from last month to 70% and linger through the winter. It says while ENSO-neutral conditions were observed during September, the combined ocean and atmosphere system are more clearly trending toward La Niña conditions.

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"All of the Niño regions cooled considerably during late September and early October, with the latest weekly value of Niño-3.4 index at -0.9°C," it states. "Subsurface temperature anomalies also decreased toward the end of the month, reflecting the strengthening of below-average temperatures at depth in the east-central equatorial Pacific. Atmospheric anomalies across the equatorial Pacific edged toward La Niña during September, with a stronger tendency toward La Niña late in the month."

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