There appears to be a huge CB cloud lingering just above Singapore, with a top at 54,000 feet. Would any planes landing in/taking off from Singapore therefore be required to fly directly through that CB? There appear to be CBs throughout the entire area; surely it wouldn't be possible to fly around/under all of them.
The key word to focus on is "
ISOL CB" meaning "
isolated cumulonimbus". This is all you can expect from a Sigwx chart as the scale is too large to get a good picture as to what is happening at an individual airport. If the CBs are indeed
isolated the aircraft should be able to navigate around them using a combination of weather radar and possibly ATC vectors.
If you are interested in looking at individual airport weather
look here.
Use the METAR/TAF Request form. If you are traveling from Dubai (OMDB) to Singapore (WSSS), type those stations into the form. If you want a translated plain english version of the aviation weather report/forecast select that feature.
Here is the untranslated version I've pulled up:
OMDB 271650Z 2718/2824 20005KT CAVOK
BECMG 2806/2808 30013KT
BECMG 2816/2818 16005KT
WSSS 271700Z 2718/2824 VRB05KT 9999 FEW018CB SCT020
TEMPO 2803/2809 4000 TSRA SCT010CB BKN015
Looking at the Singapore forecast "TEMPO 2803/2809 4000 TSRA SCT010CB" which means between 03UTC and 09UTC temporary condition 4000 metres visibility thundershowers/rain scattered ceiling 1000 ft CBs...
You shouldn't have a problem getting into this airport.
Cheers and good luck