Medina

• Hydrometeorological Hazards


  Hazards related to weather and climate
• Tropical Cyclone


  • An intense low-pressure system originating from tropical waters
  • Has a closed wind circulation and a well-defined center
  • Known as bagyo

  
• Eye


  • The center of a tropical cyclone
  • The size of the eye determines the strength of the winds in the eyewall
  • The calmest part

  
• Tropical Cyclone Structure


  • Eyewall: The most dangerous and strongest portion of the storm, where extreme winds and thunderstorms are found
  • Spiral Rainbands: Areas of turbulent weather that rotate around the tropical cyclone, capable of producing heavy bursts of rain and wind

  
• Revised definition of the Super Typhoon (STY) category

  
• Strong tropical cyclone does not equal heavy rainfall

  
• PSW signal number put in effect with the corresponding conditions that are not yet prevailing over the locality
• Lead time shortens as tropical cyclone comes closer to the locality
• Tropical cyclones are constantly in motion

  
• Change in intensity, size of the circulation or movement determines the change in PSWS number over a given locality
• Color coded rainfall advisories and classification
• Effects of Tropical Cyclones


  • Death and damage to properties
  • Disruptions to daily routines like work, schooling and business of the majority in the area
• Thunderstorm


  • A weather condition generally characterize by heavy rain, thunder, lightning, and possibly a tornado
  • Occurs when the sun heats a large body of moist air near the ground
  • Cumulonimbus clouds

  
• Floods and Flashfloods


  • Occurs when a normally dry piece of land is covered by large amount of water
  • Affects low lying areas
  • Due to excessive rainfall
  • Rising of sea level
• Causes of Floods and Flashfloods

  • Natural: Meteorological events, Seismic events, Astronomically-influenced phenomena
  • Artificial: Blasting, Construction of temporary dams, Failure of hydraulic and other control structures, Mismanagement of hydraulic structures, Denudation of forest and watershed areas
• Storm Surge


  Abnormal rise in sea level causing big waves at the coast as a tropical cyclone makes landfall

  
• Hazard Mapping: Flood and Landslide Hazard Map of Alaminos Watershed

  
• Public Information