Questions tagged [tropical-cyclone]

A tropical cyclone is a rapidly-rotating storm system characterized by a low-pressure center, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain. Depending on its location and strength, a tropical cyclone is referred to by names such as hurricane, typhoon, tropical storm, cyclonic storm, tropical depression, and cyclone.

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4
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2answers
476 views

What was the storm surge height from Hurricane Harvey?

The numbers bandied about have been 3.6 m (12 feet) and even 4.6 m (15 feet), but something told me that was unlikely. As a guy who could "almost" slam dunk a basketball, the idea of a 3 m (10 feet) ...
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1answer
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Why would Google's map of areas affected by Hurricane Harvey have advisories for the west coast and other far away areas?

What behavior of this hurricane would lead to advisories for the west coast and even parts of Canada and Alaska, when the hurricane is in the South? I have little experience in meteorology or any of ...
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How can a storm drop 40 inches (1 metre) of rain?

Hurricane Harvey dumped more that 20 inches (500 mm) of rain over a large region, with 40+ (>1000 mm) in some spots... and much more expected. How is that possible? Does the atmosphere really hold ...
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1answer
119 views

When did people first realize that hurricanes are a particular type of storm system?

To a person living on a beach in the Caribbean or crossing the Atlantic on a sailing ship, it's not obvious whether a commotion in the sky is a hurricane or some other storm system. When did people ...
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Is there any way to estimate, what is the percentage of the mass of a storm cloud that turns into rain?

I have calculated the mass of the storm cloud for Hurricane Sandy (year 2012, in the United States of America). The dimensions of Hurricane Sandy of 1800 km in diameter and 13 km in height. ...
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1answer
624 views

Are hurricanes/cyclones/typhoons in the Pacific Ocean usually larger than in Atlantic Ocean?

Just my experience of observation: hurricanes/cyclones/typhoons in the Pacific Ocean seem to look larger than those in Atlantic Ocean (by looks I mean they occupy more grids in satellite images). If ...
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2answers
675 views

Would a hurricane increase intensity due to increasing translation speed?

For example, if a hurricane has 200km/h wind speed, and it increases the translation speed from 10km/h to 30km/h, would the intensity become 220km/h?
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1answer
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What influences the movement (speed and direction) of tropical cyclones?

The recent cyclone to impact the Queensland coast of Australia (Cyclone Debbie, Category 4) tracked towards the coast at what was reported to be a very slow speed (between 6 and 7 km/hr). Is that a ...
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1answer
550 views

Does a hurricane with a smaller eye have a lower pressure?

I have heard it said that if there are 2 hurricanes with the same maximum wind speed, and one has a bigger eye while the other a smaller eye, then the one with the smaller eye would have a lower ...
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Changes in rainfalls, sea level and tropical cyclones

Is there any scientific evidence that exploitation of natural resources (fossil energies, forests etc.) affects rainfalls or sea level, which can represent extreme events? I read IPCC 2014 report and ...
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When there is snow on the ground, can a hurricane still form?

Where there is snow on the ground, it is a clear indicator that winter in near or already here. Meaning the oceans waters will be colder. But can hurricanes still form in such weather?
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Does the hour of the day and the position on the sun have any influences on the formation of a hurricane?

I am writing an essay and cannot find if a hurricane is influenced by the position of the sun or the hour of the day.
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Using Acummulated Cyclone Energy (ACE) for non-tropical cyclones

Accumulated cyclone energy (ACE) is used to measure and compare the activity of individual hurricanes and entire tropical cyclone seasons. It is calculated as an integral of the squares of hurricane ...
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1answer
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Can a hurricane with different spinning direction be formed accidently? [duplicate]

As I know, due to Coriolis force, hurricane in each hemisphere can spin in one direction only. But I also know hurricane can be formed near equator, which colriolis force is weak. My question is, is ...
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1answer
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Why does air subside in the Eye - the lowest pressure area of a tropical cyclone?

A low pressure area is associated with rising air while a high pressure area is associated with subsiding air. The best explanation I could come up with is either the cyclone is an exception or the ...
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2answers
720 views

Spatial extent and predictability of various hazards.

My question concerns the following three hazards: earthquakes, hurricanes and drought. In terms of spatial extent (wide spread, limited), I believe that earthquakes generally have the most limited ...
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Forced shallow-water equation with diabatic heating as the source term

How to obtain the divergence of velocity field $\left(\nabla.\mathbf{u}\right)$ with ${Q}$ (something proportional to the diabatic heating rate) as the source term from the thermodynamic equation? ...
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3answers
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How is it possible that a Hurricane such as Alex forms in the Atlantic in winter?

Hurricane Alex (developed from an area of low pressure which began in the Atlantic near Bahamas in January 2016, and developed subtropical and later tropical storm characteristics to the south of the ...
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1answer
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Hazard event predictions. Examples of predictions causing more harm than good

Could anyone give me any examples of attempts to predict earthquakes AND tropical storms that have caused more harm then good (e.g: because an area was predicted to have low levels of risk and ...
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4answers
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Have there ever been simultaneous cyclones in the same ocean but different hemispheres?

I'm teaching a physics class, and I'm getting to the point where we are talking about the Coriolis effect. I usually show a couple of photos/videos showing a storm in the Northern Hemisphere and a ...
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1answer
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References on hurricanes

Would anyone know of references (available online or not) that give detailed explanations and especially the physics behind violent meteorological events such as hurricanes?
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1answer
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Website that contains the maps of atmospheric pressure and wind speeds

Is there a website that contains the maps of atmospheric pressure and wind speeds for specific climatic events such as hurricanes day after day ?
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What is the reason for absence of cyclone in south atlantic and south eastern pacific [duplicate]

Please clarify my doubt regarding the question.It was asked in my examination. In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the ...
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Have two hurricanes ever merged? And what was the result?

I was just reading this about how Hurricane Ethel could have merged with Hurricane Dora in 1964. Has such a merge ever happened before in history? If so, what was the result? Would storms become ...
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0answers
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In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason? [duplicate]

Update: Granted the question has been asked in different form; but the answer still escapes me. At one place I read that locations in question have low sea-surface temperature. At ...
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1answer
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Is it possible to have a busier tropical storm season in the eastern Pacific basin than in the western Pacific basin?

It is known that hurricane activity in Atlantic basin is less active than in East Pacific basin in seasons past, but for the 2005 and 2010 seasons, the Atlantic basin is busier than western Pacific ...
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Can an Atlantic hurricane enter Mediterranean sea?

I can't find any examples, has it just never happened before or is it impossible because of environmental factors?
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1answer
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What is the potential impact of hurricane intensification and sea level rise on coastal flooding?

Climate change has the potential to increase flooding by hurricane intensification (magnitude and intensity) and by sea level rise. Many communities around the world are already exposed to coastal ...
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1answer
558 views

What is the earliest tropical cyclone in record?

The question is simple: what is the earliest tropical cyclone (hurricane or typhoon) described in the historical record?
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1answer
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The spiraling cyclone track - Cyclone Nathan

In the northern part of Queensland, Cyclone Nathan has had a spiral type of track, as can be seen below: Image credit: Tropical Cyclone NATHAN Forecast Track (Joint Typhoon Warning Center) As can be ...
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2answers
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Minimum sea-level pressure and maximum wind speed intensity relationship in Hurricane Katrina (2005)

Hurricane Katrina was one of the deadliest and most destructive hurricane to hit the US. After looking into the minimum sea-level pressure (MSLP) and maximum wind speed (MWS) intensity data from NOAA'...
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1answer
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Why do tropical cyclones around Australia have erratic paths?

According to the Australia Bureau of Meterology: Research has shown that cyclones in the Australian region exhibit more erratic paths than cyclones in other parts of the world. A tropical ...
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1answer
529 views

Two severe cyclones connected by a monsoonal trough

At the time of writing, areas around the Northern Territory (TC Lam) and Queensland (TC Marcia) in Australia are in the path of severe cyclones (category 4 at the moment, with the Queensland one - TC ...
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1answer
453 views

Relation between direction of shear and tropical cyclone formation

In an earlier question/answer Why are there no cyclones in the southern Atlantic basin there was a point raised about direction of shear(abetting/retarding) cyclone formation. It appears ...
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Why are there no hurricanes in the southern Atlantic basin?

We see tropical cyclones (going by different names e.g. hurricane, typhoon, cyclone) all over the tropics, but it seems that there are never any storms in the southern Atlantic. See this map of ...
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1answer
119 views

North Indian ocean tropical cyclones

Why are tropical cyclones in the Bay of Bengal more frequent and stronger than those in the Arabian Sea?
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1answer
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Why is there no middle ground between tornadoes and hurricanes?

A tornado has an effective area of destruction about the size of a city block. A hurricane spans several hundred kilometers. However, there doesn't seem to be a continuum between the two. Why are ...
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1answer
3k views

Winds in a northern hemisphere hurricane

In the Northern Hemisphere, do surface winds around the center of a hurricane move counterclockwise and inward or counterclockwise and outward? I'm guessing they move inward.
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1answer
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Is the poleward migration of the maximum intensity of cyclones a result of tropical expansion or are there some other contributing factors?

In the recently published article by Kossin et al. (Nature, 2014, dx.doi.org/10.1038/nature13278), they show that there is a trend toward poleward migration of the location of tropical cyclone (...
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2answers
4k views

Why is the Atlantic Hurricane Season defined as being between June 1 and November 30?

Historically, the Atlantic Hurricane Season has shifted, as close as June 15 to October 31, but since 1965, it has been between June 1 and November 30(1). Why is the Atlantic Hurricane Season defined ...
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1answer
814 views

What is the most powerful natural catastrophic event on record?

Natural catastrophic events such as hurricanes, earthquakes, volcanic eruptions and meteor impacts releases vast amount of energy. What is the most powerful single event of such nature ever recorded ...
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281 views

Will tropical cyclones form and be sustained in areas they previously were not due to global climate change?

With global climate change, is it possible that tropical cyclones (as seen in the Atlantic basin for example) are going to form and be sustained in regions where they previously did not, for example ...
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1answer
1k views

Why do tropical cyclones not tear themselves apart?

A tropical cyclone is the generic term for a hurricane, typhoon, or tropical storm. Tropical cyclones derive their energy from evaporation of water at the ocean surface which ultimately recondenses ...
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3answers
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Impossible or improbable? Hurricane crossing the equator

No known hurricane has ever crossed the equator. Hurricanes require the Coriolis force to develop and generally form at least 5° away from the equator since the Coriolis force is zero there. Are ...

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