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patches will develop in the early morning but will burn off after sunrise. The day will stay dry with bright or sunny spells throughout. Chance of cloud-free hill tops above 700m: 80%. Low cloud and visibility: After any early fog lifts and breaks cloud will be patchy 400-600m for the day

not routinely measured but important for model process understanding. Areas of key interest Measure updrafts, turbulence and dynamical structures in convective clouds on fine scales. Understand effect of pre-convective environment on subsequent storm development. Interaction between boundary layer structures

This weekend’s weather offers a mix of autumnal cloud, sunshine, and chilly nights.

Saturday will begin on a cloudy note for much of the country, with the most persistent cloud and outbreaks of rain or drizzle affecting northern and north-western parts of Scotland. Breezy conditions will accompany the rain here, making for a rather damp and unsettled start. Across southern areas

Tuesday will bring a continuation of changeable conditions across western parts of the UK, with cloud and outbreaks of rain or drizzle moving eastwards through the morning. The heaviest rainfall is expected over west-facing high ground, particularly across Wales, northern England, and southwest

fraction 12. surface (skin) temperature Un-split File 2 [yyyymmddhhmm_u1096_ng_umqv_Wholesale2.grib] Full domain, all available time steps and the following surface level parameters: 1. low cloud amount 2. medium cloud amount 3. high cloud amount 4. convective cloud base height 5. convective cloud top

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, particularly between day and night. The boundary layer depth is simply the current thickness of this layer. Fraction of horizontal grid square occupied by cloud below 1000 feet above sea level. Time steps J kg-1 0.1 [None] Hourly (1h-126h) J kg-1 0.1 [None] Hourly (1h-126h) J kg-1 0.1 [None] Hourly (1h

cloudy (night) Precipitation probability 30% 20% <05% <05% <05% <05% 20% 30% Forecast for Friday 12 Dec 2025 2025-12-12 Light rain showers (night) Weather: Early light rain soon dies as clear periods increase overnight. The day will stay dry with sunny periods. Cloud will increase from the west later

probability 30% 20% <05% <05% <05% <05% 20% 30% Forecast for Friday 12 Dec 2025 2025-12-12 Heavy rain showers (night) Weather: Early light rain soon dies as clear periods increase overnight. The day will stay dry with sunny periods. Cloud will increase from the west later in the afternoon

Tuesday will begin largely dry and bright across northwestern areas, with settled conditions prevailing. A band of cloud and scattered showers will stretch from the southwest approaches through Wales to southeastern Scotland and northeastern England. This band is expected to fragment through