I suspect the change in the post processor, with the stated intention of making the NAM and GFS post processing schemes uniform, has eliminated a smoothing process that has heretofore existed with the 0.5 GFS model output. The "new" look of this field recalls the "noisiness" that we have typically seen with the hi-res NAM output.
Any way to see if the pre-9/25 1200 UTC fields had smoothing built-in to the postprocessor?
______________________________________________________________________ Kevin Tyle, Systems Administrator ********************** Dept. of Earth & Atmospheric Sciences ktyle@xxxxxxxxxxxxxxxx University at Albany, ES-235 518-442-4578 (voice) 1400 Washington Avenue 518-442-5825 (fax) Albany, NY 12222 ********************** ______________________________________________________________________ On Fri, 28 Sep 2007, David Knight wrote:
But that notice http://www.nws.noaa.gov/om/notification/tin07-59gfs_upgrade_unifiedpost.txt says: "THE PRIMARY IMPACT TO CUSTOMERS RECEIVING THE GFS WILL BE THAT THE DEFAULT PRECIPITATION TYPE ALGORITHM WILL CHANGE" and further "THE PRODUCTS/GRIDS WHICH ARE DISSEMINATED TO NOAAPORT AND/OR THE SATELLITE BROADCAST NETWORK /SBN/ WILL NOT BE CHANGED IN VOLUME OR CONTENT." So there appears to be more to this than that . . . David
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