Which room of my basement is the best to use as a storm shelter?

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I have been thinking about this in light of the recent tornados. There are 4 places in my basement that could serve as potential shelters, each with pros and cons. 1) The main room. Pros: it is the largest, has the most exits, and the north wall is the most sheltered (my basement is largely above ground). Cons: 3 small glass-paned windows on 2 walls. 2) The closet under the stairs. Pros: extra shelter from above, a closed space. Cons: located on an exposed outside wall (concrete), only thin plywood between the closet and main room with its glass windows. 3) The laundry room. Pros: no windows, enclosed space. Cons: the gas furnace resides here, sitting by the only 2 exits. 4) The garage, built into the basement. Pros: no windows. Cons: the car, full of gasoline and the metal garage door which, if compromised, would leave us quite exposed to the storm. So, which room should be the storm shelter? Stating reasons behind your suggestions would be encouraged. Thanks for any answers in advance and God bless!