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hydrometeorological hazards
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are dangers associated with the natural phenomena involved in transport of water and energy between land surface and lower atmosphere.
hydrometeorological
hazards
intense circulating winds with heavy rain
typhoon
typhoon
are tropical cyclones whose winds are reached more than
118
kph
up to
61
kph
tropical depression
62
-
88
kph
tropical storm
89
-
117
kph
severe tropical storm
118
-
220
kph
typhoon
exceeding
220
kph
supertyphoon
PSWS
Public storm warning signal
issued by the
PAGASA
to alert the public about incoming tropical cyclones
PSWS
Winds of 30 – 60 kph
Intermittent may be expected in at least
36
hours
Preschool
suspended - Very light or no damage
public storm signal no.
1
Winds are greater than
60
kph and up to
100
kph
expected in
24
hours
primary
&
secondary
levels suspended
light to moderate damage
outdoor activities postponed
public storm signal no.
2
Winds are greater than 100 kph -
185
kph
Expected in at least
18
hours
All
classes
–
tertiary
levels ( college / univ ) suspended
Moderate to heavy damage
People advised to seek shelter
public storm signal no.
3
Strong wind of more than
185
kph but less than
220
kph
Expected at least
12
hours
All schools closed and some government and private agencies suspended
Heavy damage
public storm signal
no
.
4
Maximum sustained wind of more than
220
kph
Experienced within
12
hours
No
school
or business
Evacuation should be completed
public storm signal no.
5
also known as electrical storm
thunderstorm
The hazard in thunderstorms is associated with the following:
➢
Heavy
rainfall
➢
Lightning
➢
Air turbulence
➢
Fire
presence of excessive water on a supposedly dry land
flood
rapid flow of water on a saturated soil or dry soil
flashflood
abnormal rise in coastal waters
stormsurge
rapidly rotating column of air
tornado
large scale
warming
of the ocean
el nino
cooling
of areas in a different season
la nina
la nina start in the
eastern
part
of the tropical
pacific
ocean
tools for monitoring hydrometeorological hazards
doppler radar
automated rain gauge
used to measure important weather parameters such as amount of rainfall & direction, speed & intensity winds
doppler radar
used to detect possible flooding and flashflood
automated rain gauge
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