New data shows that a La Niña weather pattern is likely to develop in a few weeks, potentially impacting the Bay Area and California just at the start of the rainy season. The National Weather Service says there is now a 71% chance of a La Niña weather event in the Pacific Ocean starting in October. … San Francisco sits at the inflection point for the weather phenomenon’s effects, which means the region could see either more rain or drier weather during the fall months if La Niña arrives as predicted. … [C]urrent data points to a weaker La Niña this fall, but that doesn’t necessarily mean fewer big storms.

Other ENSO news:

• The New York Times: An annual blast of Pacific cold water did not occur, alarming scientists
• CBS8 (San Diego): Is San Diego in store for a dry winter?
• The Hill: Is a La Niña winter coming? NOAA releases update for 2025
• Powder: The odds of La Niña just increased. What does that mean for winter?
• Fox Weather: La Nina Watch continues with slightly higher odds of pattern change from neutral