Strong winds?
Doesn't seem to equate with the METAR
You have to realize that thunderstorms in the tropics are somewhat different than those in our world. They are very short-lived and sometimes quite strong. You then get the slippery runway if heavy rainfall is present.
I never found it very difficult to handle but if you do something wrong, you can easily get into trouble.
Also turboprops are somewhat more difficult to handle in crosswind, as are tail engine driven aircraft (remember One Two Go in HKT). You have to reduce reverse aggressivly, if go around is not possible anymore.
I don't say that this was the case here as we have to get more information, I just say that this weather could be the cause for the accident.
Dani