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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 38 U.S. stations (Blocks 72 and 74) were cited at least
once; 16 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
                    72426/ILN   1               6   1    7*
                    72764/BIS   1               3        4

ILN reported ground equipment failures from July 1st through July 3rd.  ILN
also had a flight equipment problem terminating in a short flight on July
19th.  BIS also had ground equipment problems on July 5th, as well as July
15th and 16th.

(2)  Reports from 42 stations in blocks 04, 70, 71, 76, 78 and 91 were cited
at least once; 24 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
                    76654/MZL  11               3       14
                    76256/GYM                  12       12
                    76526/ZAC   9   2           3       12*
                    91765/PPG   7               4       11
                    76679/MEX   7   2           1        8*
                    78384/GCM   1               7        8
                    76805/ACA                   4   3    7
                    71926/YBK   6                        6
                    76405/LAP   5               1        6
                    78897/PTP   5                        5
                    71082/YLT   3                   1    4
                    78397/KIN   4                        4
                    78866/SXM   2               1   1    4

There was a wide range of reasons for manual deletions this month.  Heights
and temperatures were most frequently deleted at stations MZL, ZAC, and LAP
due to high heights, warm temperatures, and baseline errors. Temperatures
and moisture were the primary deletions at PPG and PTP due to wet bulb effect.
Meanwhile, a combination of wet bulb effects and high heights/temperatures
resulted in height, temperature, and moisture deletions at MEX.   Also a
combination of super-adiabatic lapse rates and isolated spurious temperatures
and winds resulted in temperature, moisture, and wind deletions at YBK.
Erratic winds were also the most commonly cited issues at YLT and KIN.  Finally,
GYM and ACA reported several flight equipment failures, and ACA also had some
short flights.  PPG and GCM reported ground equipment failures, with GCM's
problems focused in the latter half of the month. 

* 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/