An aggressive Atlantic weather system is set to bring torrential rain across all 92 historic counties of the United Kingdom starting May 31, 2026, following a record-breaking May heatwave.
Temperatures are expected to drop to as low as 1 degree Celsius in northern areas, a sharp contrast to the recent 34.8-degree Celsius peak.
>>> Houston Traffic Signal Outages Disrupt Commuters After Severe Storms
Storm Details and Affected Areas
Advanced meteorological models from WXCharts and the ECMWF indicate the 286-mile rainstorm will cause sudden atmospheric shifts, threatening to paralyze weekend travel and trigger flash flooding.
Heavy downpours are forecast for London, Surrey, Oxford, Gloucester, Cambridge, Reading, Southampton, and Plymouth, where temperatures will hover between 5 and 6 degrees Celsius.
The coldest conditions, in single digits, will impact Edinburgh, Glasgow, and Aberdeen in northern Scotland.
The heatwave is expected to peak at 33 to 35 degrees Celsius on Bank Holiday Monday before breaking violently as the storm moves eastward from the western coasts of Wales and England.
Met Office Forecast
The Met Office's long-range forecast describes a shift to more changeable conditions as Atlantic weather systems move in from the west, bringing a mixture of drier spells and showers or longer spells of rain.
>>> Former Lake Superior School District Teacher Mike Casper Dies at 72
Forecasters note that the rain will likely be heaviest in parts of the west and northwest, with drier conditions more likely towards the south and east.
Secondary weather fronts are tracked to hit central and southern regions by June 2.
Temperatures are expected to be near-normal overall, with the warmest spots most likely across eastern areas. Breezy conditions are also expected, especially in northwestern areas.
Flood Risk and Preparations
The sharp drop from intense heat to torrential rain raises the risk of surface-water flooding, as baked soils cannot absorb the sudden deluge.
>>> Scottish Fundraiser Reaches Washington DC During Charity Walk Across US
Local authorities across the 92 threatened counties are currently clearing drainage networks and issuing public safety advisories before the storm makes landfall.
