Thank you very much for your reply and for the clarification regarding the treatment of variable wind observations in WDQMS results.
With regard to the case in question, the station concerned is:
WIGOS-ID: 0-20000-0-60468
For the month of January, we identified 261 occurrences in which variable wind was reported with the value 99 for this station. At the same time, WDQMS (ECMWF) indicates that only 480 observations were received out of 744 expected observations.
Given this, we are wondering whether these 261 cases of variable wind may have contributed, wholly or partially, to the difference between the 744 expected observations and the 480 received observations shown in WDQMS. From a numerical point of view, the gap amounts to 264 observations, which appears very close to the 261 occurrences of variable wind recorded during the month.
For a quicker verification, you may also refer to yesterday’s data (23 March 2026) for the same station. On that day, WDQMS shows 15 observations received out of 24 expected, while the 9 missing observations correspond to cases of variable wind. The observations for that day are included in the attached file for your reference.
Thank you once again for your support and assistance.
Kind regards,