User’s Guide

Foreword: A note to MET users

This User’s guide is provided as an aid to users of the Model Evaluation Tools (MET). MET is a set of verification tools developed by the Developmental Testbed Center (DTC) for use by the numerical weather prediction community to help them assess and evaluate the performance of numerical weather predictions. It is also the core component of the unified METplus verification framework. More details about METplus can be found on the METplus website.

It is important to note here that MET is an evolving software package. This documentation describes the develop release dated 20210127. Previous releases of MET have occurred each year since 2008. Intermediate releases may include bug fixes. MET is also able to accept new modules contributed by the community. If you have code you would like to contribute, we will gladly consider your contribution. Please send an email to: We will then determine the maturity of the new verification method and coordinate the inclusion of the new module in a future version.

This User’s Guide was prepared by many current and former developers of MET, including David Ahijevych, Lindsay Blank, Barbara Brown, Randy Bullock, Tatiana Burek, David Fillmore, Tressa Fowler, Eric Gilleland, Lisa Goodrich, John Halley Gotway, Tracy Hertneky, Lacey Holland, Anne Holmes, Michelle Harrold, Tara Jensen, George McCabe, Kathryn Newman, Paul Oldenburg, John Opatz, Julie Prestopnik, Paul Prestopnik, Nancy Rehak, Howard Soh, Bonny Strong, and Minna Win-Gildenmeister.

Model Evaluation Tools (MET) TERMS OF USE - IMPORTANT!

Copyright 2021, UCAR/NCAR, NOAA, CSU/CIRA, and CU/CIRES 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:

Brown, B., Bullock, R., Fowler, T., Halley Gotway, J., Newman, K., Jensen, T., 2021: The MET Version develop User’s Guide. Developmental Testbed Center. Available at: MET releases


We thank the National Science Foundation (NSF) along with three organizations within the National Oceanic and Atmospheric Administration (NOAA): 1) Office of Atmospheric Research (OAR); 2) Next Generation Global Prediction System project (NGGPS); and 3) United State Weather Research Program (USWRP), the United States Air Force (USAF), and the United States Department of Energy (DOE) for their support of this work. Funding for the development of MET-TC is from the NOAA’s Hurricane Forecast Improvement Project (HFIP) through the Developmental Testbed Center (DTC). Funding for the expansion of capability to address many methods pertinent to global and climate simulations was provided by NOAA’s Next Generation Global Prediction System (NGGPS) and NSF Earth System Model 2 (EaSM2) projects. We would like to thank James Franklin at the National Hurricane Center (NHC) for his insight into the original development of the existing NHC verification software. Thanks also go to the staff at the Developmental Testbed Center for their help, advice, and many types of support. We released METv1.0 in January 2008 and would not have made a decade of cutting-edge verification support without those who participated in the original MET planning workshops and the now dis-banded verification advisory group (Mike Baldwin, Matthew Sittel, Elizabeth Ebert, Geoff DiMego, Chris Davis, and Jason Knievel).

The National Center for Atmospheric Research (NCAR) is sponsored by NSF. The DTC is sponsored by the National Oceanic and Atmospheric Administration (NOAA), the United States Air Force, and the National Science Foundation (NSF). NCAR is sponsored by the National Science Foundation (NSF).

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