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Rapid Refresh (RAP) and High-Resolution Rapid Refresh (HRRR) Forum

HRRR Content Questions

Posted By: Jeff Krob
Date: 9-August-14 2201Z

Hello,

I have been working with processing the new HRRR GRIB2 files on the NCEP FTP server & have notices some things which prompt me to ask;

1) Why was the Complex Packing option chosen instead of the JPEG2000 Compression for the GRIB messages?

2) I noticed a few GRIB messages had more bytes (up to 2,608,791) than there were grid points (1799 x 1059 = 1,905,141)...presuming one byte/grid point. Most of the messages were smaller than 1,905,141. Why the extra data?

Thanks in advance,
Jeff
WINGRIDDS System Developer

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