The gridding of MOS

ABSTRACT MOS (Model Output Statistics) guidance forecasts have been produced at stations and provided to National Weather Service forecasters and private entities for over three decades. As the numerical weather prediction models became more accurate, MOS followed that trend. Up until a few years ago, the MOS produced at observation locations met the basic need for guidance. Wit h the advent of the Interactive Forecast Preparation System and the National Digital Forecast Database, gridded MOS forecasts became needed as guidance for forecasters. One method,of providing such grids is to objectively analyze the MOS forecasts for points. A basic successive correction method,has been extended to analyze MOS forecasts and