Emerging Storms: Late September Hurricanes in the Pacific and Atlantic


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Typhoon Jelawat and Tropical Storm Ewiniar bring a line of heavy rain to the Pacific. Image Credit: NASA

Super Typhoon Jelawat has dominated the news in a week that also featured several smaller tropical cyclones.

The Pacific region saw three different tropical cyclones at the same time, while in the Atlantic, Tropical Storm Nadine kept on spinning, moving across the two week mark without making landfall.

Jelawat Nearing Category Five Super Typhoon Status

On September 23rd, a small typhoon called Jelawat made huge gains in intensity, pushing to a category four typhoon in just 24 jours. Currently, Jelawat is edging close to Taiwan and moving toward the Kadena Air Base in Okinawa, Japan.

The super typhoon will likely make landfall there on September 28th.

Currently, the storm is a category four, which can cause catastrophic damage to homes, trees, and power lines.

Super Typhoon Sanba have already hammered Japan and Korea, and now Okinawa is now preparing for another storm. It appears that Jelawat may reduce in strength by the time it hits the area.

Ewiniar and Miriam Visit the Pacific

In the western part of the North Pacific, Ewiniar poured two inches of rainfall per hour into the Pacific Ocean. This smaller storm is expected to turn north and then northeast.

In the Eastern Pacific, Baja California was spared the full force of the powerful hurricane Miriam, although large ocean swells, heavy rain, and thunderstorms are still a very present risk. Miriam has now become a tropical storm and is being slowed by wind shear. As Miriam moves along, it is expected to weaken, since cooler ocean temperatures and higher wind shear both contribute to the weakening of tropical storms.

Tropical Storm Nadine Spins in the Atlantic

Tropical Storm Nadine is still spinning around the Atlantic region fifteen days after it emerged as a storm. Nadine has kept a low profile, since it is fairly weak and has not threatened to make landfall during the two weeks that it has been a storm. Nadine is gathering a little bit of strength, but its internal force is relatively weak, which means that the hurricane’s path can be changed by other weather systems; the hurricane is likely to arc around a high pressure system in the coming days.

Tropical Storm Nadine is unusually long-lasting, but nowhere near the record duration for a tropical storm. The record for a tropical storm was set way back in 1899, when the San Ciriaco Hurricane lasted for four weeks. In the year 2000, Hurricane Alberto lasted three weeks, making it the longest-lasting hurricane in recent memory.

Typhoons in Asia This Week

This past week, the Asia has been hit hard by typhoons, while the Atlantic region has been relatively quiet. Many of the week’s tropical cyclones have yet to make landfall or continue to spin in the open ocean, bringing a little bit of respite to those on land.


Hurricaneville. Longest Lasting Hurricanes. Accessed September 27, 2012.

NASA. Hurricanes and Tropical Cyclones. (2012). Accessed September 27, 2012.

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