Forecasters predict La Nina will likely form late this year, with an 83% chance of onset by the end of 2024's fall months, impacting weather patterns less severely.
Michelle L'Heureux emphasized that the forecast models were overly optimistic about La Nina's early onset in summer, which didn't materialize, throwing predictions off.
The delayed arrival of La Nina impacts its strength, allowing other weather phenomena, such as the North Atlantic Oscillation, to influence seasonal conditions, particularly in the Northeast.
With La Nina arriving later than expected, the usual cooler temperatures and storms across the northern US may be overshadowed by smaller atmospheric effects.
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