OBSERVE THE CHANGES IN THE WEATHER BEFORE, DURING AND AFTER A TYPHOON;

SCIENCE 5

BEFORE•HIGH CLOUDS IN THE SKY•AIR IS DRY AND COLD (WARM AIR RISES ALREADY)•RELATIVE HUMIDITY IS HIGH•WIND GENTLY BLOWS•SCATTERED RAIN SHOWER

DURING• DARK AND CLOUDY SKY• HEAVY RAINFALL WITH STRONG WIND• BIG WAVES NEAR THE COAST• WHEN WAVES GET ABNORMALLY HIGH, STORM SURGE

CAN OCCUR• FLASH FLOODS• LANDSLIDES• TREES AND CROPS ARE UPROOTED

AFTER• SUN BECOMES VISIBLE• SKY BECOMES CLEARER• SCATTERED RAIN SHOWER• AREAS MIGHT STILL BE FLOODED• RECOVERING FROM TYPHOON• RESIDENTS ARE IN THE EVACUATION AREA• RESCUE AND RELIEF OPERATIONS• WATER-BORNE DISEASE ( INFLUENZA & DENGUE)

DESCRIBE THE EFFECTS OF A TYPHOON IN THE COMMUNITY;

•WRITE A PARAGRAPH STATING SOME OF THE EFFECTS OF

TYPHOON IN THE COMMUNITY THAT YOU HAVE OBSERVED.

DESCRIBE THE EFFECTS OF THE WINDS, GIVEN A

CERTAIN STORM WARNING SIGNAL;

PSWS NO. 1

•WIND MOVING 30-60 KPH •36 HOURS

-TWIGS AND BRANCHES OF SMALL TREES MIGHT BE BROKEN-BANANA PLANT MAY BE TILTED-HOUSES OF LIGHT MATERIALS MAY BE PARTIALLY UNROOFED-RICE CROPS MAY SUFFER SIGNIFICANT DAMAGE WHEN IN THEIR FLOWERING STAGE

PSWS NO. 2•WIND MOVING 60-100 KPH• 24 HOURS

-COCONUT TREES MAY BE TILTED OR BROKEN- BIG TREES MIGHT BE UPROOTED- BANANA PLANT MAY BE DOWNED - RICE AND CORN MAY BE ADVERSELY AFFECTED- LARGE NUMBER OF HOUSES OF LIGHT MATERIALS MAY BE PARTIALLY OR TOTALLY UNROOFED- OLD GALVANIZED IRON ROOFS MAYBE PEELED OFF

PSWS NO. 3•WIND MOVING 100- 185KPH• 18 HOURS

-COCONUT TREES MAY BE BROKEN AND DESTROYED-ALMOST ALL BANANA PLANT WILL BE DOWNED AND LOTS OF TREES WILL BE UPROOTED-NIPA AND COGON HOUSES WILL BE DESTROYED AND UNROOFED WITH DAMAGE TO LIGHT AND MEDIUM CONSTRUCTION-WIDESPREAD DISRUPTION OF ELECTRICITY AND COMMUNICATION SERVICE

PSWS NO. 4•WIND MOVING FASTER THAN 185 KPH• 12 HOURS

-COCONUT PLANTATION MAY SUFFER EXTENSIVE DAMAGE-MANY LARGE TREES MAY BE UPROOTED-RICE AND CORN PLANTATION MAY SUFFER SEVERE DAMAGE-MOST RESIDENTIAL AND INSTITUTIONAL BUILDING WITH MIX STRUCTURE MAY BE SEVERELY DAMAGED-ELECTRIC POWER AND COMMUNICATION MAY BE SEVERELY DISRUPTED-DAMAGE TO THE AFFECTED AREAS MAYBE VERY HEAVY

•WRITE A PARAGRAPH OF EVERYTHING YOU HAVE LEARNED SINCE LAST WEEK’S DISCUSSION.