Have always been befuddled by the tendency for HK reports to mention MI (Mist) when they really mean toxic, lung-destroying, chemical pollutants found below the !!!!opause at 12,000 over HK.
Regarding the introduction of correct WX designators, first I thought "SH" would be appropriate but of course that indicates not !!!!e but Showers.
What about CR for Crap?
Any truth in the rumour that Donald Tang is pushing for the designator of SP for the repulsive HKHaze? The ICAO definition for SP will be "the Smell of Progress".
Meteorologically, there is even a micro-climate in the general area around north Ckek Lap Kok (specifically CX City area) for which a new designator of BS could also be used.