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Record-setting 'Bomb Cyclone' Batters Alaska's Aleutian Islands With Hurricane Force

Representational Image

Representational Image

The center of what forecasters refer to as “bomb cyclone” was measured at a record-low barometric pressure of 921 millibars, equivalent to the eye of a Category 4 hurricane and the lowest documented over the Aleutians as far back as the 1950s, Brettschneider said.

A Pacific storm of record proportions swept a remote stretch of Alaska's Aleutian Islands chain on Thursday, battering a region used heavily by commercial shipping with hurricane-force winds and seas five stories high.

“It’s the most intense storm ever recorded in the North Pacific, excluding typhoons,” said Brian Brettschneider, a NOAA research scientist with the National Weather Service.

The center of what forecasters refer to as “bomb cyclone” was measured at a record-low barometric pressure of 921 millibars, equivalent to the eye of a Category 4 hurricane and the lowest documented over the Aleutians as far back as the 1950s, Brettschneider said.

The storm unleashed seas as high as 54 feet (16.5 meters) and winds topping 80 miles per hour (120 kph) - a force of Category 1 on the Saffir-Simpson hurricane wind scale - in the western Aleutians, the weather service said.

The storm was too far from large populated areas to pose a direct hazard to many people besides those traveling in the region by aircraft or vessel, Brettscheneider said.

The Aleutian island of Shemya with a small air station and a few personnel was in the epicenter of the storm, about 1,450 miles southwest of Anchorage, Alaska's largest city. Most of the Aleutian Islands are uninhabited.

The waters, however, are heavily used by cargo ships traveling between Asia and North America. Thousands of vessels a year ply a shipping corridor known as the North Pacific Great Circle Route. The area is also important for commercial fishing.

The storm also caused some erosion of Bering Sea winter ice, already at some of its thinnest levels on record for this time of year, further disrupting a frozen landscape that walruses and some species of seals depend on.

“This may kind of set back ice formation,” Brettschneider said, adding that it would likely take five or six days for the winds to calm and for cold northern air to flow back in, allowing the Bering Sea to regain some ice.


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