Most Atlantic tropical systems form much farther south—in the tropical Atlantic, Gulf of Mexico or Caribbean—where warm sea surface temperatures and humid air foster cyclogenesis. The current system, however, is forming in cooler northern waters and under increasing wind shear, making tropical development rare but not impossible.

The Observatory (HKO) will raise the T3 storm signal at 5.20pm on Monday, with Tropical Storm Fengshen set to pass south of the territory. “Under the combined effect of Fengshen and the monsoon, rain will be more frequent at times tomorrow and early on Wednesday,

As Tropical Storm Lorenzo continues to move away from the U.S. and weaken, here's what to expect in the Jacksonville area.

A tropical wave, located very near the islands in the southeastern Caribbean on Sunday, could develop by midweek — potentially into a tropical storm, experts said.