The reponsibilities for aircraft icing forecasts in the U.S. lie with the National Weather Service (NWS) for civilian operations and the U.S. Air Force Air Weather Service (AWS) and Naval Weather Service for military operations. Forecasting technology is based upon empirical rules and techniques that were developed in the 1950s. The AWS is the only forecasting agency which issues explicit numerical icing products to aid the forecaster. These products are also based upon the application of techniques developed long ago. The NWS has no rigorous guidelines for developing icing forecasts, thus individual forecasters adopt their own preferred methods. The tendency is generally to over-forecast, that is, to forecast too large an area of icing for too long a time. A major shortcoming in the ability to produce more accurate forecasts is that atmospheric parameters critical to icing are not routinely observed.


  • English

Media Info

  • Pagination: 36 p.

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Filing Info

  • Accession Number: 00719117
  • Record Type: Publication
  • Report/Paper Numbers: CRREL-83-24
  • Files: TRIS
  • Created Date: Mar 16 1996 12:00AM