A broad disturbance over the Gulf is set to drench Florida’s Gulf Coast through the weekend, with heavy rain expected even if it never becomes a tropical cyclone. The National Hurricane Center kept the chance of formation at 30% over seven days and 10% over 48 hours on Friday afternoon, July 17.
For now, the rain is the story. Up to 7 inches was possible into Monday in the Tampa Bay area, while 2 to 3 inches was forecast more widely there and as much as 3 inches could fall from Panama City through Cedar Key. That is enough to push water into streets and low spots, especially where storms train over the same area.
Austen Flannery said some urban flooding could develop because storm water systems can only handle so much water per hour. But he also said the threat would stay pretty low if there are breaks in the rain. He put the upper-end risk in blunt terms, saying it was possible to see 10 inches over seven days, while also saying some of the higher model totals were not realistic or reasonable.
The forecast gap is what makes this system hard to pin down. Wright Dobbs said if it ends up closer to shore or farther north, heavier rainfall could shift into North Florida and the Big Bend, and he said there is still a lot of uncertainty. The National Hurricane Center’s oval-shaped watch area already stretches from coastal Louisiana through North Florida, which leaves the exact track and the heaviest rain band unresolved for now.
That uncertainty matters because the moisture feed is already expected to spread over North Florida through the weekend, while South Florida is forecast to see higher rain chances and stronger thunderstorms with damaging wind gusts. Even with Florida already in the wet season, the setup could be more disruptive than the drought map suggests: a July 16 report showed 16% of the state in extreme drought and nearly 60% in moderate to severe drought, yet a tropical downpour can still overwhelm drains in a few hours. The next question is not whether it will rain, but whether the system holds together long enough to make the heaviest bands line up over the same places through Monday.
