• Weak La Niña and disrupted vortex forecast to bring colder 2025/26 winter to northern U.S., southern Canada, and parts of Europe

    A weak La Niña and signs of a disrupted polar vortex are forecast to shape colder-than-average winter conditions across the northern United States, southern Canada, and parts of Europe during the 2025/26 season. Early seasonal outlooks suggest a higher likelihood of Arctic air intrusions and persistent cold anomalies from December 2025 through February 2026.

  • La Niña established in the tropical Pacific

    La Niña part of a cycle known as the El Niño-Southern Oscillation (ENSO) has developed in the Pacific Ocean, the Australian Bureau of Meteorology announced on November 23, 2021. Consequently, BOM's ENSO Outlook has been raised to LA NIÑA….

  • BOM: La Niña likely past peak, but influence continues

    The 2020–21 La Niña is likely to have peaked with respect to atmospheric and oceanic patterns in the tropical Pacific, the Australian Bureau of Meteorology said on February 2, 2021. All of the international climate models surveyed by the Bureau are…

  • La Niña ENSO phase declared at the peak of hurricane season

    The National Oceanic and Atmospheric Administration (NOAA) has officially declared this year's La Niña phase on Thursday, September 10, 2020. The announcement comes at the peak of the hurricane season. This weather pattern occurs over the eastern Pacific,…