Meteorological models show significant uncertainty regarding potential stormy weather in Ireland on Friday, September 30th, 2025, with the latest updates from the European Centre for Medium-Range Weather Forecasts (ECMWF) indicating a severe outcome, while other models keep the worst conditions away from the country, according to a social media post by Carlow Weather at 6:06 AM UTC. The ECMWF model is now suggesting the "worst possible outcome" for Ireland, a notable shift from previous projections. This divergence among weather models suggests that forecasts on personal weather applications may experience substantial changes in the coming hours. This developing situation contrasts with earlier reports from September 30th, 2025, between 12:35 AM and 3:35 AM UTC, which detailed the interaction between Tropical Storms Imbelden and Humberto. While the specific impact of those systems on Ireland was not detailed, the current model uncertainty highlights the dynamic nature of weather prediction. Previous reports also noted potentially catastrophic flooding in Valencia, Spain, due to a Mediterranean storm system on September 30th, 2025. High-resolution models had simulated rainfall amounts of 500-750 mm within a 24-hour period, prompting warnings of extreme localized flooding.
