WEATHER DISTURBANCES

By:Klaus Austin FuentesJan Michael G. Gaite

WEATHER DISTURBANCE a general term that describes

any pulse of energy moving through the atmosphere.

they can act as focusing mechanisms for storm formation, or even to intensify low pressure systems

TYPES OF WEATHER DIS T U RBANCES

Typhoon/Hurricane Tropical Cyclones Tornado

Typhoon/Hurricane- A large heat engine,

where great amounts of heat are being produced from the process of latent heat of condensation.

- occurs as water vapor is being evaporated from the ocean surface and condensed into cloud droplets.

Typhoon/Hurricane- Both are names of tropical storms

and most of their characteristics are the same. They have wind speeds that are more than 74 mph, and are accompanied by hail, strong winds, storm surges and rain. 

- Firstly, tropical storms are classified by the region in which they originate.

Hurricane versus Typhoons Hurricane comes

from the word Huracan which means ‘big wind’. It was originally a term used by the Native Americans for storms that originated in the West Atlantic.

Typhoon is derived from the Chinese Tai Fun which means ‘great wind’ and referred to winds that developed in the North Pacific

Hurricane versus Typhoons Hurricane develops

in the Western Atlantic Ocean where the water temperature is colder.

Hurricanes develop in the Western Atlantic Ocean during summer.

Typhoons develop in the Pacific Ocean where the water is warmer. 

Tropical storm develops where the water is warm and the place is humid. That is why it is said that typhoons are stronger than hurricanes.

Hurricane versus Typhoons Hurricanes damage more

land areas than Typhoons, which cause damage to countries’ coastlines.

Hurricanes occur during October in the Western Atlantic Ocean (cold region)

Hurricanes move both clockwise and counter clockwise

Typhoons are said to be stronger than Hurricanes because it develops where water is warm.

Typhoons appear during the months of July to November in the Northern Pacific Ocean (warm and humid region).

Typhoons move clockwise 

Causes of typhoon/hurricane: Pre-existing disturbance Warm ocean water Low atmospheric stability Sufficient Coriolis force Low vertical wind shear Upper atmosphere divergence

* Coriolis force - an apparent force that as a result of the earth’s rotation deflects moving objects to the right in the northern hemisphere and to the left in the southern hemisphere.

Tropical Cyclones- a storm

system characterized by a low-

pressure center and numerous thunderstorms that produce strong winds and

heavy rain.

Causes of tropical cyclones:

Water temperatures of at least 26.5 °C (79.7 °F) 

Rapid cooling with height High humidity Low amounts of wind shear  A need to form more than 555 km

(345 mi) or 5 degrees of latitude away from the equator

pre-existing system of disturbed weather

Tornado- rotating columns of

air usually produced by severe

thunderstorms.

Multi vortex tornadoes – mini tornadoes circulating around a larger one.

WATERSPOUT- tornadoes form over water.

LANDSPOUT - tornadoes form over land.

How tornadoes are formed?

- most tornadoes actually form from the ground up. It is simply

highly saturated air dropping from the thunderstorm which gives the appearance of a tornado “touching

down”.

How fast do tornadoes move?

- a tornado on average moves at speeds of 30mph, but can range stationary to

about 70mph.

Tornado versus Cylone Land encourages the

development of a tornado, while it destroys the cyclone’s formation.

The time frame from the birth of a tornado until it dies out, is generally measured in minutes

Tornado damage is intense and targeted

The tornado cannot encourage the development of the cyclone.

Cyclones develop and fester over the oceans.

The cyclone has a longer life span. The time frame from the birth to the death of a cyclone, is measured in hours and days.

Cyclone damage is widespread, and the exposure to the elements is longer.

The cyclone can encourage the development of the tornado once landfall is achieved.

References: http://www.pagasa.dost.gov.ph/ http://www.weather.unisys.com/ http://www.differencebetween.net/s

cience/nature/difference-between-hurricane-and-typhoon/

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