the cell but if you re in cirrus clouds that mask the thunderstorms visually, you re limited by the weather radar and it s harder and you can have a thunderstorm hide another one behind it. michael? i want to add here, let s rewind a little bit on the conversation. all of the pilots will look at the forecast well before they climb. they look at the forecast and the weather on route and will know from chatting to the weather forecasters what the weather conditions are likely to be on route. we ll have a good idea if they are a storm pattern and what route they are going to take what diversion they might need to take because they need to look at all of this when they are calculating the fuels and endurance in case they get to singapore and have to go into a hold because of inclement