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.
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3. • Typical thunderstorm
is 5 km. in diameter
• Lasts an average of
30 minutes; although
some may last longer.
• All thunderstorms are
dangerous!!!
12,000 m
9,000 m
6,000 m
3,000 m
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4. The Two Types of Thunderstorms
Air mass -
Results from surface heating
Considered self-destructive
Steady State-
associated with weather systems
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5. The Thunderstorm Recipe
Moisture Lift -
to form clouds and rain
to form clouds and rain caused by cold or
warm fronts, sea breezes, mountains, or the
sun’s heat
Unstable air -
warm air that can rise rapidly
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6. The Thunderstorm Life Cycle
DISSIPATING STAGE
MATURE STAGE
DEVELOPING STAGE
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11. Thunderstorm Warning Levels:
Thunderstorm is
threatening a specific
area within the next 2
hours.
Thunderstorm
Warning
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12. Thunderstorms can produce dangerous
weather conditions:
Heavy Rainfall
Lightning/Thunder
Tornado
Hail
Microburst
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13. Hazards Associated by TSTM:
1) Heavy Rainfall
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17. 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.
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20. STEPPED LEADER
STEPPED LEADER
AND
THE LIGHTNING BOLT!
STREAMER
UNITES
STREAMERS
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31. 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. IF THERE IS NO SHELTER AND YOU ARE
CAUGHT IN A THUNDERSTORM . . .
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33. IF THERE IS NO SHELTER AND YOU ARE
CAUGHT IN A THUNDERSTORM . . .
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35. 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.
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36. What are the signs of impending Tornado?
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44. Historical Tornado
Occurrences in the
Philippines (1994-2005)
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45. DAMAGES DUE TO TORNADO
OCCURRENCE OVER KALIBO CITY
(August 15, 1998)
UNROOFED HOUSES WITH TOTALLY CAUSEDHALF
UNROOFED SCHOOL BUILDING DAMAGED
SCHOOL BUILDING SLASHED INTO BY
HIGH RISK HOUSES
STRONG WINDS OFTORNADO
BY THE THE TORNADO
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46. What is a waterspout?
A waterspout is just a weak tornado that forms over water.
2/13/2014 10:05:57 AM
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47. What is a waterspout?
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48. What is a waterspout?
A waterspout is just a weak tornado that forms over water.
Fair Weather Water Spout
Tornadic Water Spout
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49. What is a waterspout?
2/13/2014 10:05:57 AM
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50. What is a waterspout?
2/13/2014 10:05:57 AM
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51. What is a waterspout?
2/13/2014 10:05:57 AM
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52. Hazards Associated by TSTM:
4) Hail
Chunks of ICE from the sky
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53. Hazards Associated by TSTM:
4) Hail
small balls of ice and
hardened snow that
fall like rain
Hailstorm
A storm that includes
the downpour of hail.
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55. Hazards Associated by TSTM:
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56. MICROBURST
A microburst
is a very localized
column of sinking
air, producing
damaging
divergent and
straight-line winds
at the surface.
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