Lightning & thunderstorm (Disaster Risk Reduction-Natural Hazards)

1. 2/13/2014 10:05:33 AM

2. Thunderstorm
is a localized storm
which is
accompanied
with lightning and
thunder and often
brings heavy
rainfall,
hail as well as
strong
gusty winds.
2/13/2014 10:05:40 AM

3. 12,000 m

9,000 m

6,000 m


3,000 m

• Typical thunderstorm
is 5 km. in diameter
• Lasts an average of
30 minutes; although
some may last longer.
• All thunderstorms are
dangerous!!!
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Air mass - Results from surface heating
Considered self-destructive
The Two Types of Thunderstorms
Steady State- associated with weather systems

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Moisture - to form clouds and rain
The Thunderstorm Recipe
Unstable air - warm air that can rise rapidly
Lift - to form clouds and rain caused by cold or
warm fronts, sea breezes, mountains, or the
sun’s heat

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DEVELOPING STAGE
MATURE STAGE DISSIPATING STAGE
The Thunderstorm Life Cycle

7. PAGASA
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Thunderstorm Warning Levels:
2/13/2014 10:05:48 AM

8. PAGASA
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Thunderstorm Warning Levels:
2/13/2014 10:05:49 AM

9. PAGASA
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PAGASA Thunderstorm Warning Levels:
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10. PAGASA
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Thunderstorm Warning Levels:
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11. PAGASA
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Thunderstorm Warning Levels:
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Thunderstorm
Warning
Thunderstorm is
threatening a specific
area within the next 2
hours.

12. PAGASA
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Heavy Rainfall

Lightning/Thunder

Tornado

Hail

Microburst



Thunderstorms can produce dangerous
weather conditions:

2/13/2014 10:05:50 AM

13. PAGASA
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Hazards Associated by TSTM:
1) Heavy Rainfall
2/13/2014 10:05:50 AM

14. PAGASA
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Payatas Tragedy
Cherry Hill
2/13/2014 10:05:50 AM

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Hazards Associated by
TSTM:

2) Lightning and thunder

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Hazards Associated by
TSTM:

2) Lightning and thunder
The giant spark of electricity
in lightning makes the air very
hot. When the air bumps into
the cooler air around it, this
causes a cracking sound. This
is called thunder.

18. PAGASA
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HOW THUNDER OCCURS
2/13/2014 10:05:56 AM
Rapid
expansion/
contraction
of the air
causes
thunder

19. PAGASA
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What
Causes
Lightning
2/13/2014 10:05:56 AM

20. PAGASA
DOST “tracking the sky… helping the country” 2/13/2014 10:05:56 AM
STEPPED LEADER
STEPPED LEADER
AND
STREAMER
UNITES
STREAMERS
THE LIGHTNING BOLT!

21. PAGASA
DOST “tracking the sky… helping the country” 2/13/2014 10:05:56 AM

22. PAGASA
DOST “tracking the sky… helping the country” 2/13/2014 10:05:56 AM
T-STORM DANGER
Lightning may
extend out to 4 kms.

23. PAGASA
DOST “tracking the sky… helping the country” 2/13/2014 10:05:56 AM

24. PAGASA
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5 Ways Lightning Strike People
2/13/2014 10:05:56 AM

25. PAGASA
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5 Ways Lightning Strike People
2/13/2014 10:05:56 AM

26. PAGASA
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5 Ways Lightning Strike People
2/13/2014 10:05:56 AM

27. PAGASA
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5 Ways Lightning Strike People
2/13/2014 10:05:56 AM

28. PAGASA
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5 Ways Lightning Strike People
2/13/2014 10:05:56 AM

29. PAGASA
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5 Ways Lightning Strike People
2/13/2014 10:05:56 AM

30. PAGASA
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Impacts of Lightning
2/13/2014 10:05:56 AM

31. PAGASA
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Go inside a home or large building, if you can.

Avoid using electrical appliances such as cp’s,
telephones, computers, or television sets.

If stuck outside, do not take shelter under a tall,
isolated tree.

Stay away from bodies of water.

If you are trapped in an open field and you feel your
hair stand on end, lightning is about to strike. Do
not lie flat on the ground.
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32. PAGASA
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IF THERE IS NO SHELTER AND YOU ARE
CAUGHT IN A THUNDERSTORM . . .
2/13/2014 10:05:56 AM

33. PAGASA
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IF THERE IS NO SHELTER AND YOU ARE
CAUGHT IN A THUNDERSTORM . . .
2/13/2014 10:05:56 AM

34. PAGASA
DOST “tracking the sky… helping the country” 2/13/2014 10:05:56 AM

35. PAGASA
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3) Tornado - is a localized windstorm characterized
by a visible funnel-shaped, rapidly whirling cloud that
extends from the base of a dark –cumulonimbus cloud.
• Whirling winds are estimated to exceed 450 km/hr and may last for a few
minutes
• Can strike at any time of the day and can leave a mark of destruction.
2/13/2014 10:05:56 AM

36. PAGASA
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What are the signs of impending Tornado?
2/13/2014 10:05:56 AM

37. PAGASA
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HOW
TORNADOES
FORM
2/13/2014 10:05:56 AM

38. PAGASA
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Formation of Tornadoes
2/13/2014 10:05:56 AM

39. PAGASA
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40. PAGASA
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41. PAGASA
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42. PAGASA
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43. PAGASA
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44. PAGASA
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Historical Tornado
Occurrences in the
Philippines (1994-2005)
2/13/2014 10:05:57 AM

45. PAGASA
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UNROOFED HOUSES WITH TOTALLY DAMAGED
HIGH RISK HOUSES
UNROOFED SCHOOL BUILDING CAUSED BY
STRONG WINDS OF THE TORNADO
SCHOOL BUILDING SLASHED INTO HALF
BY THE TORNADO
DAMAGES DUE TO TORNADO
OCCURRENCE OVER KALIBO CITY
(August 15, 1998)
2/13/2014 10:05:57 AM

46. PAGASA
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A waterspout is just a weak tornado that forms over water.
What is a waterspout?
2/13/2014 10:05:57 AM

47. PAGASA
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What is a waterspout?
2/13/2014 10:05:57 AM

48. PAGASA
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A waterspout is just a weak tornado that forms over water.
What is a waterspout?
2/13/2014 10:05:57 AM
Fair Weather Water Spout
Tornadic Water Spout

49. PAGASA
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What is a waterspout?
2/13/2014 10:05:57 AM

50. PAGASA
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What is a waterspout?
2/13/2014 10:05:57 AM

51. PAGASA
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What is a waterspout?
2/13/2014 10:05:57 AM

52. PAGASA
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4) Hail
Chunks of ICE from the sky
Hazards Associated by TSTM:
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53. PAGASA
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4) Hail
Hazards Associated by TSTM:
2/13/2014 10:05:57 AM
small balls of ice and
hardened snow that
fall like rain

Hailstorm
A storm that includes
the downpour of hail.

54. PAGASA
DOST “tracking the sky… helping the country” 2/13/2014 10:05:57 AM
Hail Formation

55. PAGASA
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Hazards Associated by TSTM:
2/13/2014 10:05:57 AM

56. PAGASA
DOST “tracking the sky… helping the country” 2/13/2014 10:05:57 AM
MICROBURST
A microburst
is a very localized
column of sinking
air, producing
damaging
divergent and
straight-line winds
at the surface.

57. PAGASA
DOST “tracking the sky… helping the country” 2/13/2014 10:05:58 AM
MICROBURST

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