But not all tornadoes are F5. Two percent of tornadoes are F4/F5. The tornado that hit the Amazon warehouse was an F3 with peak speeds of 150 mph. It's hard

But not all tornadoes are F5. Two percent of tornadoes are F4/F5. The tornado that hit the Amazon warehouse was an F3 with peak speeds of 150 mph. It's hard to say though what the wind speed was when it hit amazon. And while most buildings won't completely survive an F3, many safety plans call for the use an existing basement or bathrooms. Some architectures will reinforce an interior hallway.