Everything is coming together for a very high chance of storms and heavy rain that will last through the night and into Thursday morning.
The batch of storms will push across south Georgia this evening around 5-7 p.m. before sinking south into the Jacksonville area by 9 p.m. These storms will be strongest over Nassau, Duval, Camden, and Glynn counties after sunset.
A second squall line will move across southern Georgia and head east southeast down into Northeast Florida from 2-8 a.m. This line may be more favorable for isolated tornadoes.
Storms will cause damaging winds, with the possibility of a few tornadoes. Some weakening is possible after the initial storms hit but the rain will linger through the pre-dawn with some gusty storm winds in heavy showers through sunrise Thursday.
The timing of the nocturnal storms is due to an approaching cold front along with impulses of upper level energy that will invigorate the strength of storms.
Flooding is possible. Extra moisture in the atmosphere could result in localized flooding with over an inch and a half of rain. The steering flow parallel to the stationary front could cause training storms moving over the same area.
And don’t count on a dry Thursday afternoon. A third round of storms makes an encore Thursday afternoon into the night.