Clouds and rain will move in Wednesday night thanks to a not-so-tropical storm coming out of the Gulf of Mexico.

A storm system off Florida will pass several hundred miles offshore of the Lowcountry on Thursday, pushing wind and rain ahead of it as it goes. On Wednesday afternoon, the National Hurricane Center wasn’t calling for it to become a tropical storm, but Jeff Masters of Weather Underground gave it a 20 percent chance once it hits the warm Gulf Stream waters off the South Carolina coast.

The National Weather Service in Charleston is calling for increasing clouds on Wednesday and a 50-60 percent chance of rain Wednesday night into Thursday. Winds will rise to about 10-15 mph, said meteorologist Julie Packett of the weather service. Rain should be less than an inch in most places.

The wind and rain should settle by Thursday morning and skies clear into the afternoon, she said.