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Image from page 269 of "Bell telephone magazine" (1922) | by Internet Archive Book Images
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Image from page 269 of "Bell telephone magazine" (1922)

Identifier: belltelephonemag26amerrich

Title: Bell telephone magazine

Year: 1922 (1920s)

Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept

Subjects: Telephone

Publisher: [New York, American Telephone and Telegraph Co., etc.]

Contributing Library: Prelinger Library

Digitizing Sponsor: Internet Archive



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Text Appearing Before Image:

akewell over an hour to collect the infor-mation from all stations in NorthAmerica. As the weather data become avail-able, they are given immediately toa group of plotters in the WBANAnalysis Center whose job it is toenter the data on a large-scale chartso that they may be more compre-hensively understood in the laterstages of weather analysis. Thework is sub-divided among severalplotters so that several sections of the country are being plotted at thesame time. As fast as these sections are com-pleted, they are passed to a group ofweather analysts. These analysts in-clude some who specialize in the anal-ysis of surface weather conditions,while others concern themselves onlywith the analysis of upper air condi-tions. The job of these analysts Isto convert the data on the chart sec-tions Into those strange, wanderinglines, known as Isobars, which arefamiliar to all who have ever at-tempted to read a weather chart ormap and which give the trained fore- 236 Bell Telephone Magazine WINTER


Text Appearing After Image:

The objective of the whole process is an accurate local forecast by the Air Forceweather man at each air field. H. G. Stommel, technical assistant at WeatherAnalysis Center, is here shown working on a prognostic chart such as is shown on theopposite page which will go out over the facsimile network to assist in this firial step caster an instantaneous picture of thehigh- and low-pressure areas. Other information interpreted bythe analysts is the location of so-called fronts—the boundary areasbetween large masses of warm andcold air. By comparison with earliercharts, the analyst is able to showthe direction of movement of thefronts. Such analyses, particularlyof surface weather observations, areno mere matter of routine drafting.Many local conditions—the nature ofthe surrounding terrain, hills or moun-tains, rivers or other large bodiesof water, other topographical condi-tions—can influence the recordingsat any single point and it takes atrained and skillful analyst to inter-pret



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