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Powerful Hurricane Lee will create hazardous conditions along the East Coast, regardless of its uncertain final track

Category 3 Hurricane Lee remains hundreds of miles east of the Caribbean on Saturday morning, yet forecasters say the storm’s effects may have an impact on the US Atlantic seaboard as early as this weekend.

Lee was just shy of 350 miles east-northeast of the northern Leeward Islands as of 11 a.m. ET Saturday, whipping up maximum sustained winds of 115 mph, according to the US National Hurricane Center. The major hurricane, which earlier reached Category 5 status, is expected to maintain its strength Saturday but is forecast to restrengthen over the weekend.

It’s still too early to determine whether the core of the storm will directly impact the US mainland, but Lee is expected to rip currents and large waves to most of the East Coast of the United States on Sunday and Monday and worsen through the week, the hurricane center said.

“Lee is moving toward the west-northwest near 12 mph (19 km/h), and this motion is expected to continue through early next week with a significant decrease in forward speed beginning later today and Sunday,” the hurricane center said in its 11 a.m. ET advisory. “Hazardous beach conditions expected to develop around the western Atlantic through next week.”

Caribbean islands will be similarly impacted by the storm as it moves slowly west-northwest through the Atlantic. Lee is expected to pass “well to the north” of Puerto Rico, the Virgin Islands and the northern Leeward Islands, forecasters said.

“Swells generated by Lee are affecting portions of the Lesser Antilles,” the hurricane center warned Friday night. The British and US Virgin Islands, Puerto Rico, Hispaniola, the Turks and Caicos Islands, the Bahamas and Bermuda will also face swells this weekend that can bring life-threatening surf and rip conditions.

The National Weather Service office in San Juan, Puerto Rico, said waves breaking at 6 to 10 feet were forecast for Sunday. Larger waves were expected next week along east- and north-facing beaches.

“Beach erosion and coastal flooding is possible,” the office posted on X, formerly known as Twitter.

Lee enters rare company

Lee hit a rare strength that few storms have ever achieved. Only 2% of storms in the Atlantic reach Category 5 strength, according to NOAA’s hurricane database. Including Lee, only 40 Category 5 hurricanes have roamed the Atlantic since 1924.

Lee, which was a Category 1 storm Thursday, intensified with exceptional speed in warm ocean waters, more than doubling its wind speeds to 165 mph in just a day.

The storm’s winds increased by 85 mph in a 24-hour period, which tied it with Hurricane Matthew for the third-fastest rapid intensification in the Atlantic, according to NOAA research meteorologist John Kaplan. The monstrous hurricane struck Haiti in 2016, killing hundreds in the Caribbean nation while also wreaking havoc on parts of the US Southeast.

Category 5 is the highest level on the hurricane wind speed scale and has no maximum point. Hurricanes hit this level when their sustained winds reach 157 mph or higher. A 165-mph storm like Lee is in the same category as Hurricane Allen, the Atlantic’s strongest hurricane on record, which topped out at 190 mph in 1980.

Hurricanes need the perfect mixture of warm water, moist air and light upper-level winds to intensify enough to reach Category 5 strength. Lee had all of these, especially warm water amid the warmest summer on record.

Sea-surface temperatures across the portion of the Atlantic Ocean that Lee is tracking through are a staggering 2 degrees Celsius (3.6 degrees Fahrenheit) above normal after rising to “far above record levels” this summer, according to David Zierden, Florida’s state climatologist.

Reaching Category 5 strength has become more common over the last decade. Lee is the 8th Category 5 since 2016, meaning 20% of these exceptionally powerful hurricanes on record in NOAA’s hurricane database have come in the last seven years.

The Atlantic is not the only ocean to have spawned a monster storm in 2023. All seven ocean basins where tropical cyclones can form have had a storm reach Category 5 strength so far this year, including Hurricane Jova, which reached Category 5 status in the eastern Pacific earlier this week.

How close will Hurricane Lee get to the US?

Computer model trends for Lee have shown the hurricane taking a turn to the north early next week. But exactly when that turn occurs and how far west Lee will manage to track by then will play a huge role in how close it gets to the US.

Several steering factors at the surface and upper levels of the atmosphere will determine how close Lee will get to the East Coast.

An area of high pressure over the Atlantic, known as the Bermuda High, will have a major influence on how quickly Lee turns. The Bermuda High is expected to remain very strong into the weekend, which will keep Lee on its current west-northwestward track and slow it down a bit.

As the high pressure weakens next week it will allow Lee to start moving northward.

Once that turn to the north occurs, the position of the jet stream – strong upper-level winds that can change the direction of a hurricane’s path – will influence how closely Lee is steered to the US.

Scenario: Out to Sea

Lee could make a quick turn to the north early next week if high pressure weakens significantly.

If the jet stream sets up along the East Coast, it will act as a barrier that prevents Lee from approaching the coast. This scenario would keep Lee farther away from the US coast but could bring the storm closer to Bermuda.

Scenario: Close to East Coast

Lee could make a slower turn to the north because the high pressure remains robust, and the jet stream sets up farther inland over the Eastern US. This scenario would leave portions of the East Coast, mainly north of the Carolinas, vulnerable to a much closer approach from Lee.

All these factors have yet to come into focus, and the hurricane is still at least seven days from being a threat to the East Coast. Any potential US impact will become more clear as the Lee moves west in the coming days.

This post appeared first on cnn.com






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