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Story: Weather forecasting

Weather diagrams

diagram-1 In diagram 1 the centre of a weather system is about 800 miles (1,287 kilometres) WSW of New Zealand. A cloud bank looms offshore of the West Coast, and a heavy swell rolls in from the west.
diagram-2 Diagram 3 shows SW winds and clearing on the West Coast. There is NW rain in the north, and dry NW winds on the east coast of the South Island, succeeded by a ‘southerly bu’ster’ with rain or snow according to season.

In order to provide cheap, simple daily weather information to the press, in 1882 the meteorological office prepared 24 typical isobaric diagrams of New Zealand, based on three years’ analysis of weather patterns. Copies were supplied to the leading newspapers. Each day the office cited a diagram number, indicating to the newspaper which one was to be published, and added a descriptive note.

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How to cite this page

Erick Brenstrum, Weather forecasting – Early forecasting, Te Ara – the Encyclopedia of New Zealand, https://teara.govt.nz/en/diagram/7576/weather-diagrams (accessed 10 June 2026).

Story by Erick Brenstrum, published 2 March 2009, updated 1 June 2016.