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The Shipping Forecast is a BBC Radio broadcast of weather reports and forecasts for the seas around the British Isles. It is produced by the Met Office and broadcast by BBC Radio 4 on behalf of the Maritime and Coastguard Agency. The forecast dates back over 150 years. There are currently two or three broadcasts per day at the following (UK local) times: 00:48, 05:20, and 17:54 (weekends only ...
The principal weather products for UK customers are 36-hour forecasts from the operational 1.5 km resolution UKV model covering the UK and surroundings [16] (replacing the 4 km model), 48-hour forecasts from the 12 km resolution NAE model covering Europe and the North Atlantic, and 144-hour forecasts from the 25 km resolution global model ...
The European Centre for Medium-Range Weather Forecasts (ECMWF) is an independent intergovernmental organisation supported by most of the nations of Europe. It is based at three sites: Shinfield Park, Reading, United Kingdom; Bologna, Italy; and Bonn, Germany. It operates one of the largest supercomputer complexes in Europe and the world's largest archive of numerical weather prediction data. [1]
A Doppler radar is a specialized radar that uses the Doppler effect to produce velocity data about objects at a distance. [1] It does this by bouncing a microwave signal off a desired target and analyzing how the object's motion has altered the frequency of the returned signal.
Weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.). Modern weather radars are mostly pulse-Doppler radars, capable of detecting the motion of rain droplets in addition to the intensity of the precipitation. Both types of data can be analyzed ...
The radar mile is the time it takes for a radar pulse to travel one nautical mile, reflect off a target, and return to the radar antenna. Since a nautical mile is defined as 1,852 m, then dividing this distance by the speed of light (299,792,458 m/s), and then multiplying the result by 2 yields a result of 12.36 μs in duration.
Today, weather radars collect in real-time data on a large number of angles. Many countries such as Canada, UK and Australia, scan a large enough number of angles with their radars to have an almost continuous vertical view (taking into account the radar beam width) and produce CAPPIs.
The first BBC weather forecast was a shipping forecast, broadcast on the radio on behalf of the Met Office on 14 November 1922, and the first daily weather forecast was broadcast on 26 March 1923.