Hi All,
If you process the NDFD data provided by CONDUIT, you may wish to double
check that your processing is still correct. On Tuesday, the NWS
implemented a change to the Grib2 encoding parameters of some of the NDFD
grids.
https://www.weather.gov/media/notification/pdfs/scn18-84ndfd_grib2.pdf
What tripped up my LDM processing was change #4, " Change encoding of
Forecast Time value (Section 4, Octet 19; Template 4.8 and Template 4.9)
to conform strictly to GRIB2 standards."
So variables like max temperature no longer appear as just "TMXK" in the
LDM product ID, but now look like TMXK12, for example:
996607 20181101134834.067464 CONDUIT 000
data2/ndfd/YGUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/TMXK10/2 m HGHT! 000000
In this case, the TMXK10 is the max temp over a 10 hour period.
Also, change #1 detailed in the PDF link above is important if you have
software that converts the grib parameters into names. "TMP_surface" may
now appear as "TMP_2maboveground" for example.
daryl
PS, here's a sampling of F010 LDM product ids from the 14z NDFD
20181101T141005.884119Z pqcat[9273] INFO pqcat.c:77:writeprod() 996607
20181101134834.067464 CONDUIT 000 data2/ndfd/YGUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/TMXK10/2 m HGHT! 000000
20181101T141005.928200Z pqcat[9273] INFO pqcat.c:77:writeprod() 210425
20181101134902.471510 CONDUIT 001 data2/ndfd/YSUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/SNOW06/0 - NONE! 000001
20181101T141007.139631Z pqcat[9273] INFO pqcat.c:77:writeprod() 294300
20181101135533.191425 CONDUIT 009 data2/ndfd/YJUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/WXTR/0 - NONE! 000009
20181101T141007.809653Z pqcat[9273] INFO pqcat.c:77:writeprod() 467291
20181101140025.412208 CONDUIT 000 data2/ndfd/YDUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/PP100000PA/0 - NONE! 000000
20181101T141007.841020Z pqcat[9273] INFO pqcat.c:77:writeprod() 591386
20181101140044.698539 CONDUIT 001 data2/ndfd/YIUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/P06M/0 - NONE! 000001
20181101T141007.891519Z pqcat[9273] INFO pqcat.c:77:writeprod() 628450
20181101140115.976494 CONDUIT 009 data2/ndfd/YBUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/DRCT/10 m HGHT! 000009
20181101T141007.892237Z pqcat[9273] INFO pqcat.c:77:writeprod() 526267
20181101140116.075108 CONDUIT 009 data2/ndfd/YAUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/CLD/0 - NONE! 000009
20181101T141007.924379Z pqcat[9273] INFO pqcat.c:77:writeprod() 244802
20181101140121.713556 CONDUIT 009 data2/ndfd/YKUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/WVHGT/0 - NONE! 000009
20181101T141008.351754Z pqcat[9273] INFO pqcat.c:77:writeprod() 744299
20181101140601.134762 CONDUIT 009 data2/ndfd/YRUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/RELH/2 m HGHT! 000009
20181101T141008.522341Z pqcat[9273] INFO pqcat.c:77:writeprod() 1071142
20181101140806.504540 CONDUIT 009 data2/ndfd/YEUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/TMPK/2 m HGHT! 000009
20181101T141008.618877Z pqcat[9273] INFO pqcat.c:77:writeprod() 1285840
20181101140915.415201 CONDUIT 009 data2/ndfd/YWUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/GUST/10 m HGHT! 000009
20181101T141008.649770Z pqcat[9273] INFO pqcat.c:77:writeprod() 840798
20181101140922.698412 CONDUIT 009 data2/ndfd/YFUZ98_KWBN_011346.grib2
!grib2/nwstg/NWS_0/#000/201811011400F010/DWPK/2 m HGHT! 000009
--
/**
* daryl herzmann
* Systems Analyst III -- Iowa Environmental Mesonet
* https://mesonet.agron.iastate.edu
*/
