Further investigation... in
http://www.bom.gov.au/aviation/forecasts/taf/
Australian Bureau of Meteorology
you can find metar and taf for Karratha airport.
[image: 1712302652883-c0db67dd-720e-41e2-8fca-c77271fa045b-%CE%B5%CE%B9%CE%BA%CF%8C%CE%BD%CE%B1.png]
My personal opinion is that metar and taf for Karratha (YPKA) are not in international dissemination by BoM, so do not exist in aviationweather.gov database.