Science 8

2. What are the things that
Filipinos are doing during a
typhoon which should be done
as preparation for it?

4. WEATHER EXTREMES THAT
AFFECT THE PHILIPPINES
Thunderstorm
• Local storms associated
with thunder and lightning

5. WEATHER EXTREMES THAT
AFFECT THE PHILIPPINES
1. Moisture
2. Rising unstable air
3. Lifting mechanism

6. WEATHER EXTREMES THAT AFFECT
THE PHILIPPINES

7. WEATHER EXTREMES THAT
AFFECT THE PHILIPPINES
Severe Thunderstorm:
1. Hail
2. Tornado
3. Wind gust exceeding 57.5
mph

8. WEATHER EXTREMES THAT
AFFECT THE PHILIPPINES
Tornadoes
• Funnel-shaped column of
spiraling air
• Brief but extremely violent
whirling storms

9. WEATHER EXTREMES THAT
AFFECT THE PHILIPPINES
Tornadoes
 Likely to occur during hot, humid
days when cumulonimbus clouds
cover the entire sky
 Born from strong thunderstorms

10.  STORM SURGE
 The rising of the sea level
 Forces from the center of the typhoon can
cause the lifting of the sea level
 As the strong winds blow from offshore to
the coast, seawater is blown towards the
coast
WEATHER EXTREMES THAT
AFFECT THE PHILIPPINES

12. WEATHER
TERMINOLOGIES
Philippines

13.  LIGHTNING
 A giant spark of electricity in the
atmosphere between clouds, the air,
or the ground
 Intracloud lightning
 Cloud-to-ground lightning
 Causes thunder
WEATHER TERMINOLOGIES

14.  LIGHTNING
 Energy from a lightning
channel heats the air to
around 18,000 degrees
Fahrenheit
 The expansion of air creates
the sound of a thunder
WEATHER TERMINOLOGIES

15.  LIGHTNING
 Metallic taste on your
mouth
 Hair begins to stand
 Sweat in your palm
WEATHER TERMINOLOGIES

16.  LIGHTNING SAFETY
CROUCH
 Cover your Ears
 Squat
 Put or stick your heels
together
WEATHER TERMINOLOGIES

18. GUST
 Any sudden brief increase of
wind speed usually less than 20
seconds followed by a lull or
slackening in wind speed
WEATHER TERMINOLOGIES

19. MONSOON
 Asian Monsoon
 A seasonal prevailing wind in the
region of South and Southeast
Asia
WEATHER TERMINOLOGIES

20. NORTHEAST MONSOON
 Winter Monsoon
 Features cool and dry air
WEATHER TERMINOLOGIES

21. SOUTHWEST MONSOON
 Summer Monsoon
 Responsible for bringing significant
rainfall
WEATHER TERMINOLOGIES

22. RAINFALL WARNING
Community AWARENESS
FLOODING is POSSIBLE in low-lying areas
and near river channels
Community PREPAREDNESS
FLOODING is THREATENING in low-lying
areas and near river channels
Community RESPONSE
SEVERE FLOODING is EXPECTED
Take necessary precautionary measures
WEATHER TERMINOLOGIES

23. * Color coding
(2012)
* The green
color code for
rainfall warning
was replaced
with orange

24. Tropical Cyclone Warning System
 Five tropical cyclone wind signal
 TCWS no. 1 to TCWS no. 5
 Based on the wind intensity
 The frequency of issuance is four times
a day, at 5 AM, 11 AM, 5PM and 11 PM
WEATHER TERMINOLOGIES