BRITISH CROWN COPYRIGHT, THE MET OFFICE / SCIENCE PHOTO LIBRARY BRITISH CROWN COPYRIGHT, THE MET OFFICE / SCIENCE PHOTO LIBRARY
Thunderstorm detection chart. Met Office chart showing the plotted location of thunderstorms (crosses) over the North Sea and Western Europe on 13 August 1953. The storms are detected by the radio noise (sferics) produced by lightning in the atmosphere. The radio noise and direction is obtained using cathode ray direction-finding systems. The Met Office is the UK's national weather monitoring and forecasting service. At the time this chart was prepared, it was part of the Air Ministry.
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