How high is a weather storm? How high does a commercial airliner have to fly to avoid bad weather?

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If English is your second language you need to continue taking classes because your question is poor.

2 answers from pilots:

"You can pan the weather radar up and down to find the height of the cells. You can also check visually. Although with all the rising convection I don't know if I'd want to fly on top of them, some of the cells go up to 60,000+ feet. I'd rather fly around them."

"Highest I've ever actually seen was on the Gulf coast, near Mobile - Biloxi a few years back. Must have been fifty miles of red and purple returns and tops reported at seventy two thousand feet. Fly around never over."

Some storms can be higher than 40,000 feet, so flying over a storm might not be an option as commercial planes don’t fly indefinitely high (they prob are around that height maximum). Pilots will probably decide to fly around the storm instead.