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[CONDUIT #RGY-826441]: GFS (grib) forecast hours

Ryan,

This is a daylight savings time change issue with the Linux time
call in the wgrib software. I'll see if there is anything that can be done
during this time where the forecasts are for times past the time change.

Steve Chiswell
Unidata User Support




> 
> I've noticed since the weekend that the forecast hours of the GFS
> grib file that come through the ldm  are now starting to drift off by
> an hour.  for example: previously the forecast hours were ever 3
> hours out to 180 hours and 12 hours after that.  now it continues to
> do that most of the way, but sometime in between 0-180 there is a 4
> hour jump.
> 
> forecast hours: ...., 108, 111, 114, 118, 121, .....
> 
> 2006102406 run had that jump at 114 hour
> 2006102400 run had that jump at 120 hour
> 2006102318 run had that jump at 126 hour
> 2006102312 run had that jump at 132 hour
> 2006102306 run had that jump at 138 hour
> 2006102300 run had that jump at 144 hour
> 
> that continues back to the 20061019 runs and i think you see the
> pattern there.
> 
> will this be a permanent change to the GFS grib feed once this jump
> gets down toward 0, or will this be fixed.  i would hate to change my
> scripts that look for specific forecast hours to process and/or
> display this data only for it to keep changing and/or change back.
> 
> thanks for your help and i hope the above made sense.
> 
> aloha,
> ryan lyman
> 
> 
> ------------------------------------------------------------------------
> -----
> Ryan Lyman                            Mauna Kea Weather Center
> Institute for Astronomy           Forecast Meteorologist
> 640 North A‘ohoku Place      Tel: (808) 932-2323
> Hilo, Hawaii 96720-2700      Fax: (808) 933-0737
> ------------------------------------------------------------------------
> -----
> 
> 
> 
> 
> 
> 


Ticket Details
===================
Ticket ID: RGY-826441
Department: Support CONDUIT
Priority: Normal
Status: Closed