The 1st August 1999 was a scorcher with temperatures as high as 32.7C at Heathrow Airport. For western areas and parts of the Midlands, it went bang in the afternoon as thunderstorms developed. I remember it being hot sunny morning into early afternoon here. Clouds were developing to the west. By mid afternoon, there was a wall of cloud to the west and the radio was crackling away. By late afternoon, a storm struck and temperatures dropped by about 10C

Forecast from 1st August 1999

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