Understanding typhoon
- 1. UNIT 2 MODULE 2 Enhanced Science Grade 8
- 3. According to the PHILIPPINE ATMOSPHERIC, GEOPHYSICAL, AND ASTRONOMICAL SERVICES ADMINISTRATION (PAGASA), about 20 tropical cyclones enter the Philippine Area of Responsibility (PAR) each year.
- 5. Winds in a typhoon move in a certain direction; they go around a central area. The appearance of the clouds in a typhoon are in a spiral arrangement; they are being blown by winds in a counter-clockwise direction.
- 6. is a system of thunderstorms that are moving around a center. As the winds intensify or weaken, the category is upgraded or downgraded accordingly. *bagyo is called tropical cyclone by scientists in the Philippines.
- 9. Typhoons, cyclones and hurricanes are the same weather phenomenon – the difference is the geographical area where they occur. They are tropical cyclones with regionally specific names. The term typhoon is used only in the NORTHWESTERN part of the Pacific Ocean. Cyclones occur in the SOUTH PACIFIC AND INDIAN OCEAN In the NORTHEASTERN part of the Pacific Ocean and in the NORTHERN part of the Atlantic Ocean, the equivalent term is hurricane. *Thus, a hurricane on one side of the Pacific Ocean will be called a typhoon if it crosses into the other side.
- 12. A B C D E F
- 15. The warm ocean water heats up the air above it. The warm air then rises. The rising water results in a low pressure area. Air in the surroundings will then move toward the area. * Tropical cyclones usually form where there is warm water. The temperature should be 26.5°C or more.
- 16. Warm or cold? How does it affect the formation of cyclones?
- 19. • nm
- 20. • nm
- 21. Location A B C D Air pressure in millibars 930 960 980 990
- 23. PSWS # 1 METEOROLOGICAL CONDITIONS: A tropical cyclone will affect the locality. Winds of 30-60 kph may be expected in at least 36 hours or intermittent rains may be expected within 36 hours. WHAT TO DO: • Inspect your house if necessary repair/fixing is needed. • Clean up drainage system. • Harvest crops that can be yielded. • Monitor the latest Severe Weather Bulletin issued By PAGASA every six hours and hourly updates.
- 24. PSWS # 2 WHAT TO DO: • Prepare flashlights, batteries , matches, kerosene lamps, or candles and charcoal in anticipation of power failure, first aid kit and store ready to eat foods. • Keep your cell phones fully charged. • Elevate household things in case of flooding. • For fishing folks, secure fishing boats in safe area. METEOROLOGICAL CONDITIONS: A tropical cyclone will affect the locality. Winds of greater than 60 kph and up to 100 kph may be expected in at least 24 hours.
- 25. PSWS # 3 METEOROLOGICAL CONDITIONS: A tropical cyclone will affect the locality. Winds of greater than 100 kph up to 185 kph may be expected in at least 18 hours. WHAT TO DO: • If the house is not strong enough to withstand the battering of strong winds go to designated evacuation center or seek shelter in stronger houses. • Stay in safe houses until after the disturbances has left the area.
- 26. PSWS # 4 METEOROLOGICAL CONDITIONS: • A very intense typhoon will affect the locality. • Very strong winds of more than 185 kph may be expected in at least 12 hours. • WHAT TO DO: • If the house is not strong enough to withstand the battering of strong winds go to designated evacuation center or seek shelter in stronger houses. • Stay in safe houses until after the disturbances has left the area. • Evacuate from low-lying area and stay away from coastal areas for possible flooding and storm surge. • All travel and outdoor activities should be cancelled. • Watch out for the passage of the "Eye Wall and the "Eye" of the typhoon.
Editor's Notes
- #5: A supertyphoon as seen from high above the Earth; at the center is the “eye” of the supertyphoon. Image by NASA Earth Observatory
- #6: A supertyphoon as seen from high above the Earth; at the center is the “eye” of the supertyphoon. Image by NASA Earth Observatory
- #8: The public uses the word bagyo for all types of tropical cyclones. But scientists have subdivided tropical cyclones into four categories depending on the speed of the wind.