re: A map of every tornado emergency ever issued

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Who issues tornado emergencies? Is it tbe local NWS office or some national center, like the SPC?

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The NWS local office will issue the Tornado Emergency.

There's a ton of research going on now into what protects GA from seeing tornadoes, particularly violent tornadoes, compared to Alabama. Geography is likely the biggest factor. Also, the nature of the storms and the time of day they most often develop over MS and AL has a whole lot to do with it.