{"ok":true,"trend":{"id":229443,"platform":"mastodon","region":"global","key":"concern mounts over slow-moving, planetary-scale 'kelvin' wave heading for california https://www.theguardian.com/us-new","title":"Concern mounts over slow-moving, planetary-scale 'kelvin' wave heading for California https://www.theguardian.com/us-new","url":"https://www.theguardian.com/us-news/2026/sep/28/california-kelvin-wave","first_seen":"2026-09-28T11:51:42.641818Z","last_seen":"2026-09-28T11:51:42.641818Z","last_rank":1,"peak_rank":1,"last_volume":2,"peak_volume":2,"seen_count":1,"score":91.98,"category_hint":"weather","section":"environment","category":"weather","summary":"Scientists and weather watchers are tracking a vast, slow-moving Kelvin wave—a planetary-scale ocean or atmospheric pattern—that is heading toward California. The development is drawing attention because such waves can influence coastal conditions and extreme weather, and concern is mounting over what impact it could bring to the US West Coast.","why":"A rare planetary-scale weather or ocean phenomenon is reportedly heading toward a populous coastline, raising fears of potential impacts.","tone":"neutral","entities":["California","Kelvin wave","United States"],"summarized_at":"2026-09-28T11:52:11.542425Z","meta":{"tag":"weather","via":"scan","kind":"status","lang":"en","generic":0.06,"instance":"mastodon.social","tag_uses":336},"nw":0.63,"promo":0.02,"kind":"news_event","importance":1.81,"hidden":false,"hide_reason":null,"judged_at":"2026-09-28T11:51:42.998574Z","title_en":"Planetary-scale Kelvin wave heads for California, raising concern","section_name":"Environment","category_name":"Weather","timeline":[{"captured_at":"2026-09-28T11:51:42.641818Z","rank":1,"volume":2}],"posts":[{"platform":"mastodon","url":"https://www.theguardian.com/us-news/2026/sep/28/california-kelvin-wave","author":"guardian_world@robot.villas","title":null,"snippet":"Concern mounts over slow-moving, planetary-scale 'kelvin' wave heading for California https://www.theguardian.com/us-news/2026/sep/28/california-kelvin-wave # Weather # Science # Environment","posted_at":"2026-09-28T11:00:33Z","likes":2}],"elsewhere":[],"window":"7d"}}