This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Sebastien, GRIB is a message-based format, so you can take multiple grib files and just concatenate them. From unix, you could do this as: cat MRMS*.grib2 > my_new_grib_file.grib2 You could then use GRIB-aware tools, like pygrib or netCDF-java to open the tools and they should give you the data as the 3D cube you're looking for. Keep in mind we're not responsible for MRMS, we only distribute what's sent out over NOAAPORT, so we have no control over the format and what's available. Ryan > Good evening, > > I am currently a Human-Centered Design Ph.D. student doing research on 3D > weather information visualization at Florida Institute of Technology. My goal > is to introduce 3D weather information visualization to pilots and evaluate > the impact on their weather situation awareness, critical thinking and > decision making. > > It seems to me that getting MRMS information would be a good thing to start > with. I noticed that I could retrieve 3D data from > http://mrms.ncep.noaa.gov/data/3DRefl/ > <http://mrms.ncep.noaa.gov/data/3DRefl/>. However, this gives me a compressed > file available as an “image” (.grib2) that I can’t really turn into a 3D > volume. I was wondering it there was a way I could get the “raw information” > from those .grib2 files so I can then create vectors or polygons in my 3D > environment to render 3D reflectivity. > Ticket Details =================== Ticket ID: VBU-998349 Department: Support IDD Priority: High Status: Closed =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.