20010802: 20010801: SYNOP code: dclsfc: not decoding TDXC (group 333) for int stns?

Christian,

I was able to verify from WMO 306 volume II that the regional
practice for Europe (WMO region 6) is to report 12 hourly Max/Min
temperatures in the 333 group. This is why GEMPAK won't store them as 
daily max and min values.

I will look into updating the decoder to storing the T12X and T12N values
in addition to the daily values that are currently stored for the
appropriate regions.

Steve Chiswell
Unidata User Support





>From: Unidata Support <address@hidden>
>Organization: UCAR/Unidata

>
>Christian,
>
>I looked in $GEMPAK/source/bridge/ls/lstemp.f and found that the TDXC value
>is decoded, but the 333 group is regional as to whether this is
>a Daily max, 24 hour max, 12 hour max etc. Eg, according to WMO manual on
>codes 306, the period of coverage of the value is regionally specific.
>The code in the routine mentioned above only stores the value
>for WMO regions 4 & 5.
>
>I've sent a question to the developers of the routine at NCEP to see
>if they had documentation on the regional periods, or if the value
>for France should be stored as T12X.
>
>Steve Chiswell
>Unidata User Support
>
>
>
>
>>From: Christian Page <address@hidden>
>>Organization: UCAR/Unidata
>>Keywords: 200108010930.f719UA107045
>
>>
>>Hi,
>>
>>I am trying to display TDXC for international stations from a SYNOP file deco
> d
>> ed
>>as follow:
>>
>>##
>># Synoptic reports (SYNOP,SHIP) in yymmddhh_syn.wmo
>>WMO     ^S[IMN].... .... ([0-3][0-9])([0-2][0-9])
>>        STDIOFILE       data/surface/syn/(\1:yyyy)(\1:mm)\1\2_syn.wmo
>>
>># Synoptic reports (SYNOP,SHIP) in yymmddhh_syn.gem
>>WMO     (^S[IM]V[IGNS])|(^SNV[INS])|(^S[IMN](W[KZ]|[^VW]))
>>        PIPE    /io/gempak/nawips/bin/irix/dclsfc
>>        -d logs/dclsfc.log
>>        -e GEMTBL=/io/gempak/nawips/gempak/tables
>>        data/gempak/surface/syn/YYYYMMDD_syn.gem
>>
>>The raw data looks like this:
>>^C^A^M^M
>>887 ^M^M
>>SMFR01 LFPW 010600^M^M
>>AAXX 01064^M^M
>>07630 32965 10806 10217 20177 39999 40182 58004 80001^M^M
>>  333 10314 20201 31016 55124 70000 81075=^M^M
>>(...)
>>
>>The max temp is : 31.4 (group 333 then 10314) by example.
>>
>>In the GEMPAK resulting file, listing the same data :
>>    STN    YYMMDD/HHMM      PMSL     PRES     P03D     TMPC     DWPC     SPED
>>                            DRCT     GUMS     VSBK     P03M     P06M     P09M
>>                            P12M     P18M     P24M     TDXC     TDNC     WWMO
>>                            PWWM     CFRT     CFRL     CTYL     CTYM     CTYH
>>                            CLHL     CLHM     CLHH     SSTC     WPER     WHGT
>>                            SNOW     CBAS     SNEW     P24C
>>   LFBO    010801/0600   1018.20   999.90  8004.00    21.70    17.70     3.10
>>                           80.00 -9999.00    15.00 -9999.00     0.00 -9999.00
>>                        -9999.00 -9999.00     0.00 -9999.00 -9999.00 -9999.00
>>                        -9999.00     1.00     0.00     0.00     0.00     1.00
>>                        -9999.00 -9999.00 -9999.00 -9999.00 -9999.00 -9999.00
>>                        -9999.00     9.00 -9999.00 -9999.00
>>
>>
>>So, TDXC and TDNC are not decoded? Is it a problem in the decoding software?
>>
>>Thanks a lot for your support,
>>
>>Christian Page
>>UQAM
>>
>
>