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Weather Radar Data Quality Monitoring using Operational Observations Dirk Klugmann, Jordan Santillo, Robinson Wallace, Juha Salmivaara, Pekka Puhakka Vaisala Slides | Recording 11:35 – 12:00 Leonardo Data Centre: towards prediction maintenance Hassan Al Sakka, Nipesh Dulal Leonardo Slides | Recording

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Fog Fog Fog Precipitation probability 20% 20% 20% 20% 20% 20% 20% 20% Forecast for Tuesday 23 Dec 2025 2025-12-23 Weather: Extensive cloud shrouding the hills, but some bright or clear intervals on low slopes in the west. Dry for most of the time but some occasional light drizzle. Chance of cloud

The start of the week will be fine and dry with sunny spells for many in England and Wales. However, a series of weak fronts will push into Scotland and Northern Ireland bringing cloudier weather here with a chance of some light rain, especially across the northwest.   It could be the hottest spell

will attempt to move into the UK from the southwest on Friday morning, heralding the end of this impactful cold spell. Increasing cloud and light rain, perhaps preceded by a little snow, will begin to affect northwestern then northern parts of the UK through the weekend. Here, temperatures will be back

and thunderstorms, particularly into the evening. Further areas of rain may also develop in the west later in the day. Temperatures will be around to slightly above average in the north, and very warm and humid in the south, with the southeast potentially turning hot. Winds will be mostly light

. The southeast will start cloudier but should see steady improvement. Later in the afternoon and evening, cloud and outbreaks of rain, initially falling as hill snow in Scotland, will move into Scotland and Northern Ireland. Winds will remain light to moderate, and it will be widely cold. Met Office presenter

. Elsewhere, the majority will remain dry, though one or two light showers are possible, particularly over eastern England. The increased breeze may actually help to brighten things up in some areas, breaking up the cloud and allowing for occasional sunny spells. Temperatures and how it will feel

. Elsewhere, the majority will remain dry, though one or two light showers are possible, particularly over eastern England. The increased breeze may actually help to brighten things up in some areas, breaking up the cloud and allowing for occasional sunny spells. Temperatures and how it will feel

yellow, orange and red respectively - and indicate regions with relatively good seasonal prediction skill. Regions with ROC score between 0.6 and 0.7 show skill at lower levels but still better than guessing or use of climatology. Grey or light blue shading is used when scores are below 0.6 (i.e. near or below to the 0.5 'no-skill' threshold, suggesting forecasts in these regions are currently little better than guesswork).