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            SUBJECT:        Monthly Raob Data Report of Manual Quality Control


The Raob Report for July, compiled from the Raob Recap statements in the
SDM logs, which does not necessarily include data that were rejected by
automated computer generated quality control, indicates the following:

(1)  Reports from 36 U.S. stations (Blocks 72 and 74) were cited at least
once; 14 were cited at least twice; and 9 were cited at least three times.
Of those, the following were cited more than three times or had two or more no
reports:

                    STATION__ DEL BAS COR XRP EFL SHO TOTAL
                    72393/VBG   8                        8
                    72520/PBZ   4               2   1    7
                    72357/OUN                   6        6
                    72388/VEF   1               4   1    6
                    72376/FGZ                   4        4

Manual deletes for stations 72393/VBG and 72520/PBZ were mostly a result of
super-adiabatic lapse rates, which are usually due to the wet bulb effect.
There were also a couple manual deletes for 72393/VBG due to heights that
were too low at the end of the month.  Several reports of ground equipment
failures were received from the stations noted above.


(2)  Reports from 44 stations in blocks 04, 70, 71, 76, 78 and 91 were cited
at least once; 23 were cited at least twice; and 16 were cited at least three
times.  Of those, the following were cited more than three times or had two or
more no reports:

                    STATION__ DEL BAS COR XRP EFL SHO TOTAL
                    76692/HYY   1              25   1   27
                    76805/ACA   1              19       20
                    91348/PNI                  17       17
                    78866/SXM   6               6   4   15*
                    78988/CUR   1              11   1   13
                    76256/GYM   1              11       12
                    76458/MZT                  11       11
                    91765/PPG   7                        7
                    70316/CDB   4                        4
                    70350/ADQ   4                        4
                    76903/TAP   4                        4
                    78762/SJO                       4    4

Most equipment failures reported from stations in Mexico were flight
equipment failures, and most such failures from the Caribbean and Pacific
were ground equipment failures.  In addition, for Pacific station 91765/PPG
and Alaska stations 70316/CDB and 70350/ADQ, manual deletions were for 
super-adiabatic lapse rates, which are usually caused by the wet bulb effect.
There were several instances of wind deletions for station 78966/SXM and 
several deletions of heights for station 76903/TAP.

* The total differs from the sum of the itemized citations
  because of multiple citations in the same raob(s).


Citation Codes Key:
DEL  All or part of the raob was flagged for deletion.
BAS  A baseline hgt/station press error was corrected or purged.
COR  At least one correction other than baseline was made.
XRP  Station sent no report at all when one was required.
EFL  Equipment failure (codes 10142, 10144, 10158, etc.)
SHO  Raob flight was short; ie, to less than 400 mb.


This and related reports are available on the Web at . . .
http://www.nco.ncep.noaa.gov/sib/qap/raobqc/