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. Orange and red shading represent values above the 80th (Warm) and 90th (Hot) percentile, respectively; regions shaded in light and dark blue indicate values below the 20th (Cool) and 10th (Cold) percentile, with respect to the 1981-2010 climatology. The data used in this map are from the NOAA Climate

of providing a value in the 0 to 1 (or 0 to 100% range) the data is categorized into to icing intensities. A comparison of the old Icing Potential and new Icing Severity fields is shown below: WAFS Icing Potential, FL240 WAFS Icing Severity, FL240 WAW trace light moderate severe It can be seen that the new

in the atmosphere, typically between 80 and 300 kilometres above the Earth’s surface. To see them, clear, dark skies are essential. Even thin cloud can obscure the subtle colours and movements of the aurora, while thick cloud makes sightings impossible. Light pollution from urban areas further reduces

Thursday will begin with residual showers and isolated thunderstorms lingering across the southeast, gradually clearing through the morning. Western areas will see scattered, mainly light showers developing later in the day. Across central and eastern Scotland, and possibly far northeast England

. Radio waves emitted from a radar antenna travelled outwards at the speed of light, only bouncing back to the same antenna when they encountered an object. When the weather was clear, radar could quickly provide intelligence on the position of aircraft in the sky. When it was raining or snowing, echoes

Thursday will begin with residual showers and isolated thunderstorms lingering across the southeast, gradually clearing through the morning. Western areas will see scattered, mainly light showers developing later in the day. Across central and eastern Scotland, and possibly far northeast England

settled conditions across much of the UK, with most areas enjoying dry weather and sunny spells. Temperatures will be close to the seasonal average, though it will feel pleasantly warm in the sunshine, especially where winds remain light. Eastern and southeastern England may see more in the way of cloud

Governmental involvement. 1. RETURNS, REGISTERS, LOGS AND SUMMARIES — COLLATED DATA  Daily Registers  Climatological Returns  Lustrum forms  Ship, light vessel and light house logs Rainfall cards  Ten year rainfall books Daily Weather Summaries  Monthly Weather Summaries  British Rainfall  2. PRIVATE WEATHER DIARIES 3. AUTOGRAPHIC RECORDS 4. CHARTS 5. FORECAST INFORMATION 

to August - Rainfall El Niño-Southern Oscillation (ENSO) – Following the recent La Niña, sea surface temperatures in the tropical Pacific have returned to around normal with ENSO now in a neutral state. There are some mixed signals from various modelling centres regarding the evolution of ENSO later

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