And not everything that is red or magenta on the weather radar means turbulence.
Can you visually assess the thunderstorms in your scenario here?
Sometimes it is very difficult to see the CB's visually, however at night you can sure see the lightening flashes and that gives you some help trying to stay out of the worst of it, fortunately you fly through most cells in a relatively short time and if all else fails you just slow down and do your best to keep the airplane under control and hope for the best.
I'm flying between 4-5*S at the moment. Thunderstorms are a common occurrence. Not nice when they like to form blocking the "freeway" between two 16,000ft mountain ranges.
For sure it is worse in the mountainous country than over the ocean especially when it comes to what height above ground you can fly.
There are still a lot of airplanes that are flown in these conditions even in this jet age.......Twin Otters are frequently ferried over very long distances and encounter these weather problems and God knows the Twin Otter is no jet.
