Using an intensity-scale technique to assess the added benefit of high-resolution model precipitation forecasts

Deterministic precipitation forecasts from the 12- and 4-km versions of the Unified Model (UM) were compared using an intensity-scale technique. Averaging raw model output is always recommended to minimise grid-scale errors. The retained detail in averaged 4-km forecasts produces an improved prediction of larger accumulations. (C) Crown Copyright 2006. Reproduced with the permission of the Controller of HMSO. Published by John Wiley & Sons, Ltd.