DRRR HYDROMETEOROLOGICAL HAZARDS

    Cards (74)

    • What are hydrometeorological hazards?
      Processes or phenomena of atmospheric, hydrological, or oceanographic nature that may cause various impacts.
    • What impacts can hydrometeorological hazards cause?
      They can cause loss of life, injury, property damage, and social disruptions.
    • What is a tropical cyclone?
      An organized, rotating system of clouds and thunderstorms that forms over tropical ocean waters.
    • What are the different names for a tropical cyclone based on its location of formation?
      Typhoon in the Northwest Pacific, hurricane in the Atlantic and East Pacific, and tropical cyclone in the Indian Ocean and South Pacific.
    • How do the names for tropical cyclones differ based on their formation location?
      The name changes based on the ocean where the storm forms, but they are essentially the same phenomenon.
    • What direction does a tropical cyclone spin in the Northern Hemisphere?
      Counter-clockwise or anti-clockwise.
    • What direction does a tropical cyclone spin in the Southern Hemisphere?
      Clockwise.
    • What are the main parts of a typhoon?
      • Eye: The calm center of the typhoon.
      • Eyewall: The area with the strongest winds.
      • Rainbands: Bands of clouds spiraling into the center.
    • What is the purpose of a Public Storm Warning Signal (PSWS)?

      To inform the public about the projected impacts of the storm and when they are expected to occur.
    • What is the wind threat for Signal No. 1 in the Modified Tropical Cyclone Warning System?
      39-61 km/h.
    • What are the potential impacts of a Signal No. 1 warning?
      Minimal to minor damage to poorly constructed houses and some damage to rice crops.
    • What is the wind threat for Signal No. 2 in the Modified Tropical Cyclone Warning System?
      62-88 km/h.
    • What are the potential impacts of a Signal No. 2 warning?
      Minor to moderate damage to structures and considerable damage to rice crops.
    • What is the wind threat for Signal No. 3 in the Modified Tropical Cyclone Warning System?
      89-117 km/h.
    • What are the potential impacts of a Signal No. 3 warning?
      Substantial damage to structures and heavy damage to rice crops.
    • What is the wind threat for Signal No. 4 in the Modified Tropical Cyclone Warning System?
      118-184 km/h.
    • What are the potential impacts of a Signal No. 4 warning?
      Severe damage to structures and significant disruption to public transportation.
    • What is the wind threat for Signal No. 5 in the Modified Tropical Cyclone Warning System?
      185 km/h or higher.
    • What are the potential impacts of a Signal No. 5 warning?
      Severe to catastrophic damage to structures and prolonged disruption of services.
    • What characterizes a thunderstorm?
      Heavy rain and wind accompanied by lightning and thunder.
    • What is the typical duration of a thunderstorm?
      It can last from 30 minutes to several hours.
    • What conditions are required for thunderstorm formation?
      Moisture and rapidly rising warm air.
    • What is the key mechanism in thunderstorm formation?
      Convection is the key mechanism.
    • How do updrafts and downdrafts contribute to thunderstorm formation?
      They create a balance that allows thunderstorms to form.
    • What happens as condensation progresses in a thunderstorm?
      The cloud develops and intensifies the storm.
    • What can cause extensive damage during a storm?
      Airborne debris
    • Who is at great risk of injury or death during a storm?
      People, pets, and livestock exposed to the wind
    • What services will be unavailable for prolonged periods due to a storm?
      Electricity, potable water supply, and telecommunications
    • What type of disruption will public transportation experience during a storm?
      Prolonged significant to severe disruption
    • What will happen to the majority of trees during a storm?
      They will be broken, defoliated, or unrooted
    • What types of plants will be extensively damaged during a storm?
      Banana and similar plants
    • What is a thunderstorm characterized by?
      Heavy rain and wind accompanied by lightning, thunder, sometimes with hail and tornadoes
    • How long can a thunderstorm last?
      30 minutes to several hours
    • What conditions are required for a thunderstorm to form?
      Moisture and rapidly rising warm air
    • What is the key mechanism in thunderstorm formation?
      Convection
    • What happens when there is a balance of rising air and sinking air in a thunderstorm?
      Thunderstorms form
    • What shape do clouds take as condensation progresses in a thunderstorm?
      An anvil-like shape, forming cumulonimbus clouds
    • What can clouds contain that contributes to lightning formation?
      Millions of suspended water droplets and ice particles
    • How is a negative charge created in clouds?
      Through collisions of water droplets and ice particles
    • What happens when air becomes sufficiently ionized?
      It can become electrically conductive (plasma)
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