HYDROMETEOROLOGICAL HAZARD Flashcards
three ingredients to make weather
water, air, and heat.
are
hazards pertaining to natural processes
brought about by weather, water, and
climate that bring havoc to life, property
and livelihood.
Hydrometeorological hazards
are natural
processes or phenomena of atmospheric,
hydrologic or oceanographic nature, which may
cause the loss of life or injury, property damage,
social and economic disruption or environmental
degradation. (World Meteorological
Organization)
Hydrometeorological hazards
is a localized
(small-scale) storm associated with towering
dark cumulonimbus clouds which often
brings heavy rainfall, hail, severe gusty
winds, and frequent lightning and thunder.
Thunderstorm
how many diameter does thunderstorm affect?
5km
It is a violent whirlwind and associated with a
cloud column or funnel-shaped cloud extending
downwards from the base of cumulonimbus but
not necessarily reaching the ground. The
diameter can vary from a few meters to some
hundreds of meters.
Tornado/Waterspout
Excessive rains can produce flash floods/floods
which can change small creeks into raging
floodwaters, sweeping over structures along its
path.
Heavy Rainfall
are large pieces of ice that form
within, and falling from a cumulonimbus cloud.
Since air temperature in the Philippines is
normally high, hailstones that reach the ground are
usually the size of a grain of corn, seldom to cause
damage to properties. But xcan destroy crops.
Hail
is a massive electrical discharge between a
cloud and another or between the cloud and the ground. The
heating of the air by lightning causes the air to expand
producing what we hear us thunder. Positively-charged
particles collect at the top of the cloud, while
negatively-charged particles stay at the bottom. Due to the
high voltage differences that build up within the cloud or
between the rain cloud and the ground below, this creates
dramatic forks of x.
Lightning
is dangerous and sometimes fatal. The
temperature of a x bolt is five times hotter
than the surface of the sun! The sudden lightning
makes sound waves in the air that we hear as thunder.
x can cause death and injuries and can spark
fires. If caught outdoor, keep away from open spaces
and isolated trees.
Lightning
is an intense low
pressure system with minimum sustained winds
of 35 kph blowing in a counterclockwise
direction towards the center called the “eye”. It
is generally a large circular system in which the
atmospheric pressure decreases from the outer
periphery towards the center.
Tropical Cyclone
TC tends to lose its strength when it moves
over
land or cool water.
A mature TC may have a
diameter of
1000 kms.
usually form in the Pacific Ocean between the
Philippines and the Marianas- Caroline Island above
50N Latitude and a few of them develop in the South
China Sea, west of the country. They move generally
in a west-northwest direction, intensifying as they
approach the Philippine area.
Tropical Cyclone
is the center of the tropical cyclones
eye and is normally circular in shape with
generally cloud-free skies. The wind is light
and calm or relatively very light winds and
there is no rain. It ranges in size from
10-100 kilometers in diameter.
Eye
