NEW METHODS FOR DETECTION OF THUNDERSTORM GUST FRONTS SHOW MERIT

The article describes two sensor systems being used at several airports to measure meteorological parameters which have a high correlation with oncoming thunderstorm gust fronts. One system measures changes in wind velocity by means of five or six anemometers distributed more or less symmetrically around the airport, each 1200 meters from the nearest runway, with the measurements made at each site being compared with the centrefield or operating wind. When a significant difference in the wind velocity occurs between one or more of the added anemometers, pilots in the area are advised. Another meteorological phenomenon which correlates highly with thunderstorm gust fronts (albeit not perfectly, so any system measuring it must be used in conjuction with other sensors such as anemometers and weather radars in order to weed out false alarms) is rapid drops in air pressure. A system which measures this parameter consists of an array of 120 pressure jump sensors nominally spaced 1 km apart, linked to a central data logging site by telephone circuits, and interspersed throughout with 10 analog anemometer sites, 12 microbaragraphs (also linked to the central data logger) and two thermographs. Through a test display located at the central data logging site, it is possible to observe a line representation of the gust front as it advances across the sensor array.

  • Corporate Authors:

    International Civil Aviation Organization

    Attn: Document Sales Unit, 999 University Street
    Montreal, PQ  Canada  H3C 5H7
  • Authors:
    • Coons, F G
  • Publication Date: 1978-7

Media Info

  • Features: Photos;
  • Pagination: p. 21-23
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00183874
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 11 1979 12:00AM