La Nina is a natural climate pattern that influences global weather marked by cooler than average ocean temperatures in the equatorial Pacific, with pronounced effects in winter.
Last winter was the warmest on record for the Lower 48 because it was dominated by El Nino, leading to a significant winter snow drought across the Northeast and Midwest.
The strength of La Nina is crucial; a stronger event typically brings more consistent impacts on winter weather, while a weaker version allows other climate phenomena to influence outcomes.
Forecasts suggest that La Nina has a 60% chance of emerging through November, which could significantly change winter weather patterns across the United States.
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