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MIAMI (CBSMiami) — The National Weather Service has issued a Tornado Watch for much of the state of Florida, including the tri-county area.

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Seven counties total are included in the 24-hour watch in effect until 6 a.m. Monday: Miami-Dade, Broward, Palm Beach, Collier, Glades, Hendry and Mainland Monroe.

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Strong to severe storms moved through northern and central Florida Sunday, the same front that stormed through Georgia and the southeast, killing at least 18 people.

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Strong wind gusts are expected as the squall line develops.