A muted sun rose on Grand Bahama Island on Tuesday as Dorian scoured the tropical savanna, a stationary system waiting for a dimple in the jet stream — a hiccup in upper-level winds — to nudge it from its deadly complacency.

A low-pressure trough came as if in slow motion, moving east to bully the tropical cyclone out of the way like a bouncer tossing a drunk from a bar.

But that was after a more than 30-hour razing of the northern Bahamas by an up-to-185 mph Category 5 hurricane gorging on deeply warm waters, with no shear and no mountains to break it apart.

“It was just perfect timing for the storm to grow,” said Jeff Weber, an atmospheric scientist for the University Corporation for Atmospheric Research. “It blew up right between a trough and a ridge and just sat in the doldrums, literally.”

By the 5 p.m. advisory Tuesday from the National Hurricane Center, the same atmosphere that stoked a killer had swatted it down to a Category 2 hurricane, urging it northwest at 6 mph — a relatively swift pace from its overnight stall and a day at just 1 mph.

In the previous 24 hours, Dorian had traveled only about 40 miles, according to Colorado State University researcher Phil Klotzbach.

“While Dorian’s path has been better for Florida than it could have been, the Bahamas really took one on the chin,” said Klotzbach, who has family in Cape Canaveral. “This storm will be life-changing for them.”

Klotzbach said Dorian’s birth and evolution were unusual. The original forecast path had the possibility of Dorian getting shredded by the 10,000-foot mountains on Hispaniola. Instead it went over St. Lucia, knocking it off track and sending it east of Puerto Rico, where it sailed into hurricane heaven — an environment with low wind shear and warm water.

Weak steering currents deep in the atmosphere are to blame for Dorian’s aimlessness over the northern Bahamas.

It had been riding under the Bermuda High, forging west at the behest of the permanent clockwise churn in the Atlantic.

But then it reached the western edge and stalled, where it waited for a constipated atmosphere to fire up again.

Typically, a stationary hurricane will start churning up cooler water from below, and that helps tame wind speeds.

“But in the Bahamas, it’s warm deeper and the Gulf Stream runs near there, so it’s constantly getting resupplied,” Klotzbach said.

Dorian is expected to remain a Category 2 storm into Thursday as it follows the coast up to Nova Scotia.

The epic tropical cyclone has cemented itself in history regardless of its progression.

Dorian’s maximum sustained winds of 185 mph tied it for fifth place for strongest winds by any hurricane, typhoon or cyclone anywhere in the world since 1980, according to Klotzbach.

The Pacific basin’s Hurricane Patricia in 2015 is in first place with 215 mph winds.

Other Atlantic basin storms ahead of or tied with Dorian include 1980’s Allen with 190 mph winds, followed by the 185-mph monsters Gilbert (1988), and Wilma (2005).