User’s Guide

Foreword: A note to METviewer users

This user’s guide is provided as an aid to users of the METviewer. METviewer is a database and display system designed to work with the ASCII output statistics produced by the MET software. MET is a set of verification tools developed by the Developmental Testbed Center (DTC) for use by the numerical weather prediction community - and especially users and developers of the Weather Research and Forecasting (WRF) model - to help them assess and evaluate the performance of numerical weather predictions.

It is important to note here that MET and METviewer are evolving software packages. Previous releases of METviewer have occurred each year since 2010. This documentation describes the develop release dated 2021-05-10. Intermediate releases may include bug fixes.

Model Evaluation Tools Viewer (METviewer) TERMS OF USE - IMPORTANT!

Copyright 2021, UCAR/NCAR Licensed under the Apache License, Version 2.0 (the “License”); You may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.


The citation for this User’s Guide should be:

Burek, T., T. Jensen, L. Goodrich, J. Prestopnik, L. Blank, and T. Fowler, 2021: The METviewer Version develop User’s Guide. Developmental Testbed Center. Available at :


We thank all of the METplus sponsors including: DTC partners (NOAA, NCAR, USAF, and NSF), along with NOAA/Office of Atmospheric Research (OAR), NOAA/National Weather Service, NOAA/Joint Technology Transfer Program (JTTI), NOAA/Subseasonal to Seasonal (S2S) Project, NOAA/Unified Forecast System Research to Operations Project (UFS R2O), Met Office and the Naval Research Laboratory (NRL). Thanks also go to the staff at the Developmental Testbed Center for their help, advice, and many types of support.Finally, the National Center for Atmospheric Research (NCAR) is sponsored by NSF.

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