Articles by glossarch

How to install wgrib2 in OSX

August 19, 2017 | glossarch

Prompted by both my own struggles with wgrib2 compilation and a plea on the rNOMADS email listserv, I’m going to describe how to compile and install wgrib2 on Mac OS. First of all, some background: wgrib2 is an excellent utility written by Wesley Ebisuzaki at NOAA.  It allows for ... [Read more...]

Accessing ensemble weather models with rNOMADS

November 24, 2016 | glossarch

Downloading a weather model and using it to predict stuff is all well and good – but what are the sources of error?  Specifically, how accurate is the atmospheric parametrization?   Luckily, NOMADS provides sets of models with slightly different initialization values.  The result is a set of realizations that captures the ...
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How to install rNOMADS with GRIB file support on Windows

April 26, 2015 | glossarch

Two years ago, I wrote a software package for R called “rNOMADS” that interfaces with online weather and sea ice model repositories to gather data in real time, for free.  The data are delivered in two ways: a simple, pure R, cross platform interface using GrADS-DODS, and binary files in ... [Read more...]

rNOMADS 2.0.2 released

September 3, 2014 | glossarch

I uploaded the newest version of rNOMADS to CRAN yesterday. This one has a new plotting function for wind altitude azimuth, and magnitude (see below for plot and source code). I also added a function for reading GRIB inventories, fixed a few typos, and tweaked a few functions. In other ... [Read more...]

rNOMADS 2.0.1 released

July 5, 2014 | glossarch

The latest version of rNOMADS is now available on CRAN.  This update resolves several minor bugs and one major one involving multiple variable/level selections when using the ModelGrid function.  I have also added support for two more models on NOMADS:  Climate Forecast System Flux Products and Climate Forecast System 3... [Read more...]

How to install rNOMADS on Linux

January 24, 2014 | glossarch

About 6 months ago, I wrote a package for the R programming language called rNOMADS.  It interfaces with the National Oceanic and Atmospheric Association’s Operational Archive and Distribution System (NOMADS), comprising everything from global weather forecast models, to high resolution regional models, to wave and sea ice models.  rNOMADS uses ... [Read more...]

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