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of the parent GCMs and thus affect our perception of climate change over North America, and how important are the relative contributions of RCMs and GCMs to the uncertainty (variance explained) for different seasons and variables? The RCMs tend to produce stronger climate changes for precipitation

the UK and they ‘block’ the passage of depressions. These anticyclones are most common in spring but can occur in all seasons — sometimes they can persist for a month or more and completely change the character of the weather. In summer, the blocking anticyclones can bring a prolonged spell of warm

: Autumn’s stormy spell and tropical influences Author: Press Office 1 October 2025 Are we in for a stormy spell on Friday night? How wet will it get before then? And could a tropical tango influence both of those things? This week’s Met Office deep dive explores a complex and dynamic weather pattern

increase and the number of days exceeding 35°C (40°C) is projected to increase by 15-35 (0-5) days per year across the zone. • There is no decisive trend for whether Zone 5 will become wetter or drier, although there is evidence for a small delay to the start of the rainy season. Year-to-year

proxy observations (see ‘What do the projections show in recent climate?’ for more details). In the recent climate (1980-2000), the Global PPE-15 and Regional RCM-12 models agree well with the proxy observations in terms of duration and magnitude of the summer dry season, but show a delay in season

to be much wetter over the lake (biases as large as 8 mm/day with respect to CPC- FEWS). The discrepancy between the amount of rain in the model and in observations is particularly pronounced in the late rainfall season (SON), but the bias is also present in the off-peak seasons. The bias is present

back to 1884. In a month that was wet and dull for many, people certainly didn’t feel that May was a record breaking month. But what could cause such a disconnect between perception and statistical reality? New analysis In new analysis, Met Office scientists have looked at what caused such anomalously

in the north-eastern part of the zone. • Inland (lake and river) fisheries and marine fisheries. Zone 3 is projected to be hotter on average, potentially wetter in the wet season, and potentially drier September-November. • High confidence for a warming of 1.5-4°C in annual mean temperature in the 2050s

RAL3.3 S Amer Africa SE Asia “DYAMOND3” Takasuka et al (2024); Grey-scale = incomplete and not yet available Regional evaluation of resolution and physics dependencies Increasing model resolution 5/3 scaling Parametrised convection GPM Explicit convection Claudio Sanchez Results from earlier DYAMOND

Strong winds and flooding from storm Angus, November 2016 The first named storm of the 2016-2017 season brought some damaging winds to the south coast, accompanied by heavy rain causing flooding mainly across parts of south-west England. Gusts in exposed coastal locations reached 60 to 70 Kt (69