[Ncep.list.nws-ncep-management] 12Z NAM ANALYSIS FAILURE on 11/26 at 1341Z

NOAA SDM sdm at noaa.gov
Thu Nov 26 18:17:56 UTC 2015


Final Update...


Developers discovered that a sonde had more levels than GSI could handle
and an error code indicated the issue and caused the 12Z analysis to fail.
The RAP and GFS do not have this raob level enhancement.  A line in the
code was changed from true to false in order to turn off raob level
enhancement.   The fix was implement for subsequent model runs to prevent
recurrence.   The 12Z NAM was degraded but completed successfully after a
97min delay.

These are the following Model delays due to down stream effects;

    akrtma14 - 4 files (55.4 - 55.56 min)
    aqm12 - 12 files (68.23 - 96.48 min)
    dgex12 - 36 files (90.61 - 96.68 min)
    hirtma14 - 2 files (53.48 - 53.48 min)
    lmp16 - 3 files (95.9 - 96.53 min)
    nam12 - 430 files (88.93 - 97.11 min)
    nam14 - 10 files (90.63 - 96.76 min)
    prrtma14 - 2 files (53 - 53 min)
    rtofs00 - 11 files (94.5 - 96.6 min)
    wafs00 - 1 file (5.033 min)



Randy

Senior Duty Meteorologist

On 26 November 2015 at 16:33, NOAA SDM <sdm at noaa.gov> wrote:

>
> To All,
>
> The 12Z NAM Analysis appears to be hanging on prepbufr file data.  The 12Z
> NAM was run in cold start mode and also hung at the same point.   The
> developer recommended commenting out  a copy of prepbufr file for now to
> let the model run through.  This will degrade the 12Z NAM forecast.   EMC's
> Prep buffer focal point was notified.   12Z NAM Model passed the point of
> failure and is delayed up to 97min.
>
> The developer is rerunning the 12z parallel NAM analysis (which failed in
> the same way) without surface land data.   The developer indicated that the
> NAM uses this data and the GFS (which did not fail this morning) does not.
>   If this works then the developer will  suggest turning this data off
> temporarily in the operational NAM until developers find the problem, as a
> similar failure in the in the 18Z NDAS and tonight's 00Z NDAS may occur. .
>
>
> Randy Shruell
>
> --
> Senior Duty Meteorologist
> NOAA/NWS/NCEP/NCO/PMB
>



-- 
Senior Duty Meteorologist
NOAA/NWS/NCEP/NCO/PMB
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