Tag Archives: Typhoon

Super Typhoon Nepartak

This is a huge hurricane/typhoon heading quickly, and imminently, towards taiwan.

The storm itself is roughly as wide as the island nation is long, so very little will be left unaffected.

The storm is at the very high end of the range of storms in size, strength, etc. It is currently equivalent to a Category 5 hurricane. It may weaken a bit before landfall over the next few hours, but it may remain a Category 5.

Winds, huge waves and coastal flooding from storm surges will be a big problem with this storm, but the largest problem may be the incredibly high rainfall, with about one meter of rain (3 feet) predicted in some locations. This could cause unprecedented and major flooding.

Nepartak should be regarded as a global warming enhanced storm. The storm is made so large and strong because of extraordinarily high sea surface temperatures, which in turn is an effect of human caused global warming.

Locally, the Green Island and the Taiwanese city of Taitung City are on or very close to the expected storm track. If the storm tracks a bit south, expect very severe storm surges in Taitun city. Either way, there will be major rainfall in the river basins, and the valley ousee north of Taitung City, which has several settlements in it, seems likely to be at major risk.

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Here is the most current (10:34 AM CT) map from Weather Underground showing the relationship between the storm and Taiwan.

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Climate Signals has info on the storm, and does a good job at evaluating the likely relationship between the storm and human caused climate change.

On July 4 and 5, in just 24 hours, cyclone Nepartak intensified from a 70 mph storm to a Category 4 super typhoon with 150 mph winds, peaking with 1-minute sustained winds of 173 mph (150 knots) on July 6. Currently a Category 5 storm, Nepartak is forecast to strike Taiwan Thursday night, July 7, local time (midday Eastern time) before moving on to eastern China. The rapid intensification of Nepartak was driven by favorable climate conditions, including passage over unusually warm seas with some of the highest oceanic heat content readings observed in conjunction with a tropical cyclone. There is a documented increase in the intensity of the strongest storms in several ocean basins in recent decades, including the Pacific Northwest. And warming seas are offering more energy to passing storms. Extreme rainfall over Taiwan is expected to be intense, fueled in part by a warmer atmosphere, with total rainfall in some areas reaching well above 3 feet. The reach of Nepartak’s storm surge will be extended due to elevated sea levels driven up by global warming.

Jeff Masters is covering the storm here. He discusses the very rapid development of this storm:

Category 5 Super Typhoon Nepartak is steaming towards a Thursday landfall in Taiwan after putting on a phenomenal display of rapid intensification on Monday and Tuesday. Nepartak went from a tropical storm with 70 mph winds on Monday afternoon to a Category 4 super typhoon with 150 mph winds on Tuesday afternoon, in just 24 hours.

Suddenly, The Atlantic. And Delores.

But first a word bout Chan-Hom. That typhoon messed with China but not as badly as originally feared, because the storm turned to the east a bit. Now, Chan-Hom is heading for North Korea where it will come ashore as a wet tropical storm. I would not be surprised if more bad stuff happened there than with Chan-Hom’s glancing blow over the last 24 hours or so.

Now I’d like to direct your attention the Atlantic Ocean for a moment. Due to vertical wind shear and aridification-induced North African dust, we have been expecting that one effect of climate change would be that most (but not all) Atlantic Hurricane seasons would be attenuated. Add in El NiƱo and you get more of that attenuation. On the other hand, with Weather Weirding also associated with climate change, may be we’ll see more oddities than previously in the basin. This year, the Atlantic Hurricane season has been very anemic, maybe even more anemic than last year.

But suddenly, something might be happening and it might be a little odd.


Disturbance Number 1 is way far from the area where hurricanes normally form, and is classified as a non-tropical system. It is not likely to do anything. But it is sufficiently active that it got a mention by the National Weather Service and they are watching it closely.

Yes, folks, that’s all we’ve got in the Atlantic.

Meanwhile there have been many often quite active storms in the Pacific, including Chan-Hom of course, and now there is a named storm in the Eastern Pacific. It is Dolores (see image above). Delores is likely to turn into a hurricane some time tomorrow, and the storm will continue wet northwest out to sea, staying away from Mexico, through the work week. It is not going to become a very powerful hurricane (though all hurricanes are of course powerful) during that time. After that it all depends on how far north Delores drifts. The farther north, the more likely to weaken.

Meanwhile from the Weather Underground, we have this amazing graphic showing seven notable tropical energy blobs, including several named storms, some hurricanes.