How much rain, storm surge to expect
Ten to 15 feet of dangerous storm surge is forecast for Florida’s Big Bend area. Tampa Bay could see 4 to 8 feet of storm surge.
Four to 8 inches of rain is expected from Helene, with 12 inches locally, bringing major flash flooding.
Tornadoes are also possible on Wednesday and Thursday.
Damaging wind gusts over 100 mph will be possible in Tallahassee and Florida’s Big Bend area during landfall Thursday night.
-ABC News' Melissa Griffin