User's Guide for the NMM Core of the

Weather Research and Forecast (WRF)

Modeling System Version 2.2

(view complete document in pdf)

Foreword

1. Overview

· Introduction

· The WRF-NMM Modeling System Program Components

2. Software Installation

· Introduction

· Required Compilers and Scripting Languages

o WRF System Software Requirements

o WPS and WRF Post-Processor Software Requirement

· Required/Optional Libraries to Download

· UNIX Environment Settings

· Building the WRF System for NMM Code

o Obtaining and Opening the WRFV2 Package

o How to Configure the WRFV2

o How to Compile the WRFV2 for the NMM Core

· Building the WRF Preprocessing System

o How to Install WPS

· Building the WRF Post-Processing Code

o How to Install the WRF Post-Processor

3. WRF Preprocessing System (WPS)

(Preparing Input Data)

· Introduction

· Function of Each WPS Program

o Program geogrid

o Program ungrib

o Program metgrid

· Running the WPS

· Creating Nested Domains with the WPS

· Using Multiple Data Sources

· Parallelism in the WPS

· Checking WPS Output

· WPS Utility Programs

· WRF Domain Wizard

· Writing Meteorological Data to the Intermediate Format

· Writing Static Data to the Geogrid Binary Format

· Description of Namelist Variables

· Description of GEOGRID.TBL Options

· Description of METGRID.TBL Options

4. WRF-NMM Initialization

· Introduction

· Initialization for Real Data Cases

· Running real_nmm.exe

5. WRF-NMM Model

· Introduction

· WRF-NMM Dynamics

o Time stepping

o Advection

o Diffusion

o Divergence damping

· Physics Options

o Microphysics

o Longwave Radiation

o Shortwave Radiation

o Surface Layer

o Land Surface

o Planetary Boundary Layer

o Cumulus Parameterization

· Description of Namelist Variables

· How to Run WRF for NMM core

· Configuring a Run with Multiple Domains

· Real Data Test Case

· List of Fields in WRF-NMM Output

·  Extended Reference List for WRF-NMM Core

6. WRF Software

· WRF Build Mechanism

· Registry

· I/O Applications Program Interface (I/O API)

· Timekeeping

· Software Documentation

· Portability and Performance

7. NCEP WRF Post-Processor v2.2

• Introduction
• Functionalities
• Computational Aspects and Supported Platforms
• Directory Structure
• Setting up the WRF model to interface with the WRF Post-Processor
• Control File Overview

o Controlling which variables wrfpost outputs

o Controlling which levels wrfpost outputs

• Running the WRF Post-Processor

o Overview of the steps in scripts to run the WRF Post-Processor

• Visualization

o GEMPAK

o GrADS

• Fields Produced by the WRF Post-Processor

Appendix A - WRF-NMM Standard Initialization (WRF-NMM SI)

· Introduction

· Function of Each WRF-NMM SI Program

· Description of Namelist

· WRF-NMM SI Software Requirements

· How to Install the WRF-NMM SI

· How to Run the WRF-NMM SI

o Using the WRF-NMM SI GUI

o Manually Running WRF-NMM SI

o Configuring Nested Domains

· Using Multiple Data Sources

· Checking WRF-NMM SI Output

· List of Fields in WRF-NMM SI Output