DRRR LESSON 1

• Hydrometeorological hazard

  • process or phenomenon of atmospheric, hydrological or oceanographic nature that may cause loss of life, injury or other health impacts, property damage, loss of livelihoods and services, social and economic disruption, or environmental damage (NDMP, 2016)
• Tropical cyclones

  • An intense circular storm that originates over warm tropical oceans and is characterised by low atmospheric pressure, high winds, and heavy rain.
• Hurricane

  • Eastern pacific ocean and atlantic ocean
• Typhoon

  • North West Pacific Ocean
• Cyclone

  • Indian ocean & east Pacific Ocean
• Thunderstorm

  • a powerful, short-lived weather disturbance, almost always associated with lightning, thunder, dense clouds, heavy rain or hail, and fast, roaring winds.
• Cumulus stage

  • Where the sun heats the Earth’s surface during the day and warms the air around it.
• Mature stage

  • A cumulus cloud becomes very large, where the water therein becomes large and heavy, and raindrops begin to fall through the cloud when the rising air can no longer hold them up
• Dissipating stage

  • After 30 minutes, the thunderstorm begins to dissipate, this occurs when the downdrafts in the cloud begin to dominate over the updraft. Since warm moist air can no longer rise cloud droplets can no longer form 
• Flash and flash

  • Which water overflows its natural or artificial banks onto normally dry land, such as a river inundating it floodplain 
• inland flooding

  • The technical name for ordinary flooding that occurs in inland areas, hundreds of miles from the cost 
• Flash flood

  • Also caused by heavy precipitation in a short period of time, usually less than 6 hours. Caused by heavy rain or the sudden release of water over a short period if time 
• River flooding

  • Occurs when water level in river, lake, and stream rise and overflow onto the surrounding banks, shores, and neighbouring land.
• Coastal flooding

  • Occurs when dry and low-lying land is submerged (flooded) by seawater
• Urban flooding

  • Occurs when there is a lack of drainage in an urban (city) area 
• Storm surge

  • Where the irregular sea-level rise during tropical cyclone or “bagyo” occurs
• Orange

  • Alarm
• Yellow

  • Alert
• Green

  • No alert
• Red

  • Take action
• El niño

  • refers to the large-scale ocean-atmosphere climate interaction linked to a periodic warming in sea surface temperatures across the central and east-central Equatorial Pacific.
• La niña

  • episodes represent periods of below-average sea surface temperatures across the east-central Equatorial Pacific.
• Robinson anemometer

  • is a device used for measuring wind speed and direction.
• Wind vane

  • an instrument that measures the direction from which the wind is blowing.
• Barometer

  • a scientific instrument used to measure atmospheric pressure, also called barometric pressure.
• Thermometer

  • used to measure the temperature and this is a very important part of weather forecasting. Many thermometers come in a glass tube that contains a liquid, usually mercury or alcohol.