AI weather model flagged Hurricane Melissa as a Category 5 threat to Jamaica five days out

Google DeepMind described how its AI weather model, WeatherNext, helped forecasters anticipate one of the most dangerous storms of the 2025 Atlantic hurricane season. According to the company, WeatherNext predicted that Hurricane Melissa would reach Category 5 strength and make landfall in Jamaica five days in advance with 80 percent confidence, rising to near certainty three days out.

Melissa became the strongest hurricane on record to strike Jamaica and tied as one of the strongest Atlantic hurricanes ever recorded, in October 2025. DeepMind says the case was notable because the model anticipated rapid intensification from comparatively modest initial winds, a scenario that has historically challenged forecasters. Throughout the season, WeatherNext was integrated into the US National Hurricane Center's workflow, where its guidance sat alongside traditional physics-based models and satellite data and was reviewed by human forecasters.

“According to the company, WeatherNext predicted that Hurricane Melissa would reach Category 5 strength and make landfall in Jamaica five days in advance with 80 percent confidence, rising to near certainty three days out.”

Early, confident warnings matter most when they translate into action. Evan Thompson of Jamaica's Meteorological Service said that with early evacuation and better preparation, the resulting reduction in harm really does make a difference to people. Google said it is extending WeatherNext collaboration to meteorological agencies in the Philippines, Taiwan, Indonesia and Vietnam, with further work planned elsewhere.

The appropriate framing is augmentation, not replacement. AI models like WeatherNext are fast and increasingly accurate, but the National Hurricane Center uses them as one input among many, with experienced meteorologists making the final calls and issuing official warnings. No model is infallible, and a single well-predicted storm is not proof of consistent skill. Still, when an AI system gives emergency managers extra days to organize evacuations ahead of a record-breaking hurricane, the value is concrete and measured in lives and livelihoods protected.