Forecasting Altimeter Settings.
Abstract
This report discusses four methods for converting a forecast sea-level pressure to a forecast altimeter setting. The first method, which is the shortest and the easiest to use, gives acceptable accuracy at most stations below 1000 feet elevation and at many stations above 1000 feet. The second method is more general and is designed primarily for use at stations above 1000 feet in cases when large pressure and/or temperature changes are expected during the forecast period. Both the first and second methods require concurrent values of sea-level pressure and altimeter setting at the forecast station. The third method is useful when concurrent values of sea-level pressure and altimeter setting are not available. It may be used at any elevation. The fourth method enables the forecaster to convert a forecast altimeter setting at one station to a forecast altimeter setting at a nearby station. Step-by-step procedures are outlined for each method, and the necessary nomograms and a table (Appendix A) are included. A theoretical discussion of the basis for the methods is presented in Appendix B.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1979
- Accession Number
- ADA098599