A framework for using a present weather observation method to calculate a driving rain wall factor at any location

In this paper, the author presents a framework for using a present weather observation method to compute a driving rain wall factor at any location. First, an airfield index must be calculated for the closest appropriate weather observation station. The station index is then modified to an airfield index for the city, town or village in question by correcting for general location, topography and rainfall at the wall site. The derived airfield index can then be used to calculate a wall index using previously developed correction factors. An example is provided to illustrate the methodology. This type of framework is a necessary step if proposed standard methodologies for assessing the driving rain impact on a vertical surface using meteorological data are to find widespread practical application.