A helpful glossary of terms associated with weather and climate.

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


A hindcast is a numerical model integration of a historical period where no observations have been assimilated. This distinguishes a hindcast run from a reanalysis.

Historical data

Measurements or model data that were generated in the past. This data is stored for several years, so it can be accessed in the future e.g. satellite or radar images, rain gauge data, weather station observations, Numerical Weather Prediction model outputs.