science

Tropical cyclone wind speed climatology

Tropical cyclone wind speed climatology is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Tropical cyclone wind speed climatology rather than just read about it. In short: Tropical cyclone wind speed climatology is the study of wind distribution among tropical cyclones, a significant threat to land and people. Since records began in 1851, winds from hurricanes, typhoons and cyclones have been responsible for fatalities and damage in every basin.

Key takeaways

Tropical cyclone wind speed climatology belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tropical cyclone wind speed climatology to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tropical cyclone wind speed climatology from memory before moving on to harder problems.

Reference excerpt

Tropical cyclone wind speed climatology is the study of wind distribution among tropical cyclones, a significant threat to land and people. Since records began in 1851, winds from hurricanes, typhoons and cyclones have been responsible for fatalities and damage in every basin. Major hurricanes (Category 3 or above) usually cause the most wind damage. Hurricane Andrew for example caused $45 billion (2005 USD) in damage, most of it wind damage. Although wind damage is rare to tropical cyclones near landmasses, there are a few factors that lead to high wind speeds. Warm water temperatures, which was seen during Hurricane Wilma when its winds rapidly strengthened to 185 mph (298 km/h) in a 24-hour period due to the presence of abnormally warm water temperatures. Size and speed of the storm, which results in damage along a wide area as seen in Hurricane Isabel and Great New England Hurricane of 1938.

Winds in tropical cyclones The winds in a tropical cyclone are the result of evaporation and condensation of moisture which results in updrafts. The updrafts in turn increase the height of the storm which causes more condensation.

Location of the winds

The strongest winds in a northern hemisphere tropical cyclone is located in the eyewall and the right front quadrant of the tropical cyclone. Severe damage is usually the result when the eyewall of a hurricane, typhoon or cyclone passes over land. The right front quadrant is also an area of a tropical cyclone were the winds are strongest. The reason that the winds are at the front right side of a storm in the northern hemisphere (and the front left hand side in the Southern Hemisphere) is because of the motion of a tropical cyclone contributing to its rotation. A 100 mph hurricane while stationary, might have winds of 100 mph on its right side in the northern hemisphere while the rest of the storm might have winds at 70 mph. The location of the right (or left in the Southern Hemisphere) front quadrant also depends on the storm track. For example, in the northern hemisphere, if the storm was moving west, then the right side is to the north, if it moving north, then the strongest winds will be to the east of the center.

In the southern hemisphere, the strongest winds are to the left of the eye. That is because cyclonic winds below the equator, spin clockwise. On occasion, strong winds and wind gusts can occur in the rain bands of a tropical cyclone. And inside the eye the winds are relatively calm. At higher altitudes, the winds within a tropical cyclone head away from the center, forming the outflow which produces the shape of the tropical cyclone.

Classification of the winds

The United States uses the Saffir–Simpson hurricane wind scale, a 1–5 scale which categorize hurricanes by sustained wind speed. The hurricane scale was created in 1969 by Herbert Saffir and Bob Simpson. The National Hurricane Center classifies hurricanes category 3 or above, major hurricanes. The Joint Typhoon Warning Center also uses a scale similar to the Saffir-Simpson Hurricane Scale. However, the JTWC classified typhoons with winds of at 150 mph or higher Supertyphoons. The Bureau of Meteorology in Australia uses a 1–5 scale called tropical cyclone severity categories. Unlike the Saffir–Simpson Hurricane Scale, it categorizes tropical cyclones based on wind gusts.

Beaufort wind scale Before the 1–5 scale was created in 1969 by the National Hurricane Center and later by the Bureau of Meteorology in Australia, many tropical cyclones were simply ranked by the Beaufort Wind Scale which was created in the early 1800s by Francis Beaufort. The purpose of the scale was to standardize wind reports in ship logs. The scale was divided down into 14 forces (force 0 is calm while force 12 is hurricane).

Fastest wind speed per basin This lists the fastest wind speed of a tropical cyclone per basin since 1950 (NOTE: All wind speeds are 1-minute sustained and are in mph).

North Atlantic: 190 mph (1980) East Pacific: 215 mph (2015) Central Pacific: 175 mph (1994) West Pacific: 215 mph (1961) North Indian: 175 mph (2019) South Indian: 165 mph (1994) Australia: 180 mph (2006) South Pacific: 180 mph (2016) South Atlantic: 105 mph (2004)

Wind speed per country

Australia In December 1998, Cyclone Thelma produced wind gusts of 108 mph (174 km/h) and sustained winds of 80 mph (130 km/h) as it made landfall in Western Australia. Three months later, Cyclone Vance produced a record gust of 166 mph (267 km/h). Sustained winds of 113 mph (182 km/h) in Onslow. Cyclone John made landfall near Port Hedland, Australia as a category 4 tropical cyclone. Port Hedland experienced winds of 78 mph (126 km/h) for a period of 18 hours. At Karratha, the winds were gusting to 70 mph (110 km/h). Cape Lambert experienced sustained winds of 95 mph (153 km/h) for a five-hour period with gusts reaching 130 mph (210 km/h). In March 2000, Tropical Storm Tessi made landfall near Townsville, Queensland, Australia. A weather station recorded the towns record wind gust of 81 mph (130 km/h).

Canada A fast-moving Hurricane Hazel brought sustained winds of 77 mph (124 km/h) and wind gusts up to 90 mph (140 km/h). The remnants of Hurricane Audrey brought 80 mph winds across southern Canada. A weather station on Nova Scotia recorded 100 mph sustained winds when Hurricane Juan made landfall in 2003.

Japan During Typhoon Vera's impact on Japan, weather station in Iwo Jima reported winds of 89 mph (143 km/h).

United States

Florida During Hurricane Wilma's passage through Florida a weather station recorded sustained wind speeds of 77 knots, gusting to 101 kts.

References

Illustrations

Worked examples

Example 1 — a first encounter with Tropical cyclone wind speed climatology

Start with the simplest possible case. Write down what Tropical cyclone wind speed climatology claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Tropical cyclone wind speed climatology before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Tropical cyclone wind speed climatology ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Tropical cyclone wind speed climatology

In research: Tropical cyclone wind speed climatology appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Tropical cyclone wind speed climatology in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Tropical cyclone wind speed climatology is common in secondary-school and first-year university syllabi. It links to neighbouring topics Tropical cyclone meteorology, Tropical cyclones, so understanding it makes those chapters shorter.
In everyday life: Look for Tropical cyclone wind speed climatology outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Tropical cyclone wind speed climatology in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tropical cyclone wind speed climatology means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Tropical cyclone wind speed climatology out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tropical cyclone wind speed climatology in simple terms?

Why does Tropical cyclone wind speed climatology matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Tropical cyclone wind speed climatology?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Tropical cyclone wind speed climatology.