Overview
- The Met Office has multiple yellow rain warnings in force from Saturday into Monday for parts of Scotland, northern England, Wales and Northern Ireland, with Cumbria forecast to see over 200mm and periods of strong southwesterly winds.
- The Environment Agency says significant surface‑water flooding is possible over the weekend and that river flooding impacts are likely in parts of northern England on Sunday and Monday.
- Forecasters expect the UK pattern to stay unsettled next week, with further Atlantic systems and most snow risk confined to higher ground in the north.
- Private forecast charts from WXCharts point to a potential Arctic blast around December 19–20 with snow possibly reaching as far south as Devon, though timing and accumulations remain uncertain and mixed rain may limit settling.
- Across the United States, the National Weather Service has issued widespread winter storm alerts with localized snowfall up to about 30 inches, avalanche danger in mountain areas and life‑threatening wind chills that could dip below −30°F.