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SUBJECT:        Monthly Raob Data Report of Manual Quality Control


The Raob Report for January, 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 25 U.S. stations (Blocks 72 and 74) were cited at least
once; 6 were cited at least twice; and 4 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

(2)  Reports from 39 stations in blocks 04, 70, 71, 76, 78 and 91 were cited
at least once; 22 were cited at least twice; and 17 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
                    76458/MZT                  28       28
                    76654/MZL   7              19       26
                    76692/HYY   2               9       11
                    76256/GYM   5               3   1    9
                    76405/LAP   2               6        8
                    76679/MEX   6   2           2        9*
                    70350/ADQ   4   1           1        5*
                    76805/ACA                   5        5
                    78486/SDQ   5                        5
                    91765/PPG   5                        5
                    78016/BDA   3                   1    4

As is common, several deletions of temperature and moisture data were done at
PPG due to the wet bulb effect.  Other stations with more frequent wet bulb
effect deletions were ADQ and BDA.  High heights and warm temperatures were the
most common reason for height and temperature deletions at MZL and MEX, while
low heights and cold temperatures were the reason for deletions at SDQ.  There 
were several deletions of wind data at GYM due to erroneous wind speeds and 
directions.  With respect to equipment failures, MZT, HYY, GYM, LAP, and ACA
had issues with flight equipment.  MZL had issues with flight equipment in the
last 2/3 of the month, but in the first 1/3 of the month, MZL reported several
ground equipment failures.

* 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/