SUBJECT:        Monthly Raob Data Report of Manual Quality Control


The Raob Report for March, 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 35 U.S. stations (Blocks 72 and 74) were cited at least
once; 12 were cited at least twice; and 7 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
                    72327/OHX   2               5        7
                    72202/MFL   4                        4

Most manual deletions in March were due to super-adiabatic lapse rates.  One
deletion at MFL was due to winds that were too strong.  All equipment failures
reported at OHX were ground equipment failures. 

(2)  Reports from 42 stations in blocks 04, 70, 71, 76, 78 and 91 were cited
at least once; 17 were cited at least twice; and 13 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
                    91212/GUM                  27       27
                    78073/NAS                  21       21
                    76743/VHA                  15       15
                    76654/MZL                  13       13
                    76405/LAP                  12       12
                    70308/SNP   2               3   1    6
                    71926/YBK   5   1                    5*
                    76692/HYY                   5        5
                    91348/PNI   4                        4

Most manual deletions at stations SNP and PNI were due to super-adiabatic lapse
rates.  At station YBK, most deletions were due to wet high heights and warm
temperatures, but one deletion at this station was due to cold temperatures.
All equipment failures reported from GUM, NAS, and SNP were due to ground
equipment failures.  All equipment failures from VHA, MZL, LAP, and HYY were due
to flight 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/pmb/qap/raobqc/