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-------- Original Message --------239 NOUS42 KWNO 091900
ADMNFD SENIOR DUTY METEOROLOGIST NWS ADMINISTRATIVE MESSAGE NWS NCEP CENTRAL OPERATIONS CAMP SPRINGS MD 300 PM EDT TUE OCT 09 2007 TWO CHANGES TO THE GFS, TO REPAIR ISSUES THAT AROSE AFTER THE 09/25/2007 GFS POST IMPLEMENTATION, WILL BE MOVED INTO PRODUCTION FOR THE 12Z CYCLE ON WED, 10/10/2007. THESE CHANGES HAVE BEEN TESTED FOR OVER A WEEK AND THE RESULTSVERIFIED BY PARTIES IN THE PUBLIC AND PRIVATE SECTORS.
GRID INTERPOLATION... A CHANGE WILL BE MADE TO THE INTERPOLATION ROUTINE FOR AWIPS AND WAFS GFS PRODUCTS, AS WELL AS GFS GRID SETS SENT TO PUBLIC SERVERS, TO CONSISTENT BI-LINEAR INTERPOLATION. THIS WILL REMOVE MUCH OF THE NOISE OBSERVED IN CONTOURS, AS WELL AS SOIL/LAND INCONSISTENCIES. SPURIOUS HIGH PRES OVER MOUNTAINOUS COASTS... A CHANGE TO THE GFS POST CODES WILL REMOVE A PERSISTENT, SPURIOUS HIGH PRES SYSTEM FORECAST OVER HAWAII AND THE ALASKAN COAST. $$ ACHORN/SDM/NCO/NCEP EFFECTIVE JAN 29 2008...ALL NCEP DERIVED MODEL GRIB1 PRODUCTS WILL BE REMOVED FROM THE NCEP AND NWSTG PUBLIC FTP AND HTTP SERVERS. GRIB1 DATA SENT ON THE SBN AND NOAAPORT WILL NOT BE IMPACTED BY THIS MIGRATION. THE GRIB1 PRODUCTS WILL BE REPLACED WITH EQUIVALENT GRIB2 PRODUCTS. PLEASE SEE THE FOLLOWING TIN FOR MORE DETAILS. USE LOWER CASE AND ONE LINE: HTTP://WWW.NWS.NOAA.GOV/OM/NOTIFICATION/ (CONTINUED) (CONTINUED) TIN07-49FRIB1_TO_GRIB2_CONVERSION.TXT
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