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in a number of different ways including from satellite data, by radar and by LiDAR (Light Detection and Ranging). The Met Office uses an instrument called LiDAR to measure ash clouds. LiDAR works by sending pulses of laser light through the atmosphere, which is scattered by volcanic ash particles. Some

Specifications and equivalent speeds Beaufort wind scale Mean Wind Speed Limits of wind speed Wind descriptive terms Probable wave height Probable maximum wave height Seastate Sea descriptive terms Knots ms-1 Knots ms-1 in metres1 in metres2 0 0 0 <1 <1 Calm - - 0 Calm (glassy) 1 2 1 1-3 1-2 Light

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 

, the sound of thunder at very close range has been known to cause injury to humans and damage to property. How far away is a thunderstorm? Thunder will always be heard after the lightning strike is seen owing to the fact that light travels significantly faster than sound. Both the lightning and thunder

The impacts of extreme rainfall could be more frequent and severe than had previously been thought at the last UN climate conference, COP25, two years ago in Madrid. A new generation of climate models and the latest IPCC assessment (AR6) have provided a new light to look at the recent catastrophic

, like taking an umbrella or getting ready to build a snowman!  Rain Rain is the type of precipitation we see most of the time in the UK; it is water in its liquid state. Rain can come in lots of sizes, from big, heavy drops to light, little specs.  Drizzle Drizzle is also water that falls out

'. This is the temperature at which air will condense from water vapour into water droplets. This is the same effect you get when warm moist air comes into contact with a cold bathroom mirror. While vapour is relatively transparent, droplets reflect light and therefore reduce visibility. When this reduction

No Likelihood Weather and chance of precipitation at 800m Time 06:00 09:00 12:00 15:00 18:00 21:00 Cloudy Light rain Light rain Light rain Cloudy Partly cloudy (night) Precipitation probability 30% 40% 70% 50% 30% 10% Forecast for Monday 30 Sep 2024 2024-09-30 Weather: Mostly cloudy with some patchy

. 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

around 85% of the sun's UV rays so can cause sunburn to the underside of your chin and your ears in particular. Up to 80% of the sun's UV rays penetrate light clouds, and what gets through can reflect back and forth between the clouds and the snow. So even if it's cloudy it's important to protect