SUBJECT:        Monthly Raob Data Report of Manual Quality Control


The Raob Report for April, 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; 9 were cited at least twice; and 5 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
                    72694/SLE                  12       12
                    72558/OAX   1               3   1    5
                    72364/EPZ                   4        4

All equipment failures reported at stations SLE, OAX, and EPZ were due to ground
equipment failures.  Failures at SLE occurred between April 10-19.  At station OAX,
they occurred on the 18th and 19th.  Reported failures at EPZ occurred on April 1st and 2nd. 

(2)  Reports from 25 stations in blocks 04, 70, 71, 76, 78 and 91 were cited
at least once; 10 were cited at least twice; and 8 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
                    76405/LAP                  57       57
                    70133/OTZ                  19       19
                    70350/ADQ                  14   1   15
                    91765/PPG                   8        8
                    78397/KIN   6                        6
                    70316/CDB                   3   1    4
 
All equipment failures rported at station LAP were due to flight equipment failures.
There were also a few flight equipment failures reported by stations OTZ and PPG.
The rest of the equipment failures reported at stations OTZ, ADQ, PPG, and CDB were
due to ground equipment failures.  Finally, all manual deletions at station KIN were
for temperatures and moisture due to super-adiabatic lapse rates.

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 . . .
https://www.nco.ncep.noaa.gov/omb/dataqc/