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WHAT ARE SYNOPTIC CHARTS?These are the weather mapsthat you see on television and in thenewspaper.

WHAT ARE ISOBARS?Isobars are the lines on weather maps. They join areas of eqal air

pressre. Numbers higher than 1013 hectopascals on an isobarindicate high air pressure. Numbers lower than 1013 hectopascalsindicate low air pressure.

WHAT ARE !OWS AN" HI#HS?!ow Air Pressre S$stem- Hot moist air rises. This leaves an areaunderneath the rising air where there is less air. This area has lowair pressure. ow pressure systems indicate %lo&$ or rain$

perio&s.

Hi'h Air Pressre S$stem ( !n the other hand" cool dry air sin#s.This $orms an area where is more air with high air pressure.High pressure systems indicate fine %ool &r$ weather.

HOW "O ISOBARS IN"ICATE WIN"?I$ the isobars are %uite close together on the weather map"win&will )low from the hi'her pressre area to the lower pressre area*

The closer the isobars" the $aster will be the wind. The $urther apartthe isobars" the gentler will be the wind.

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WHAT SY+BO!S IN"ICATE C!O,"S OR RAIN?!ow Pressre Area - ! . ( ows indicate clouds or rain.

Tro'hs& - - - - - - ' ( Troughs are elongated areas o$ low pressure

where clouds or rain will probably occur.

Col& /ront& ' ( ) cold $ront is an area where amass o$ cold air moves very %uic#ly underneath a mass o$ warmmoist air. This causes the warm moist air to suddenly drop its rain.The result is a 0er$ s&&en thn&erstorm.

Warm /ront& ' - ) warm $ront occurs when a mass o$warm moist air moves slowly over the top o$ a mass o$ cold air.

The result is&ri11lin' rain that ma$ last a few &a$s.

Tropi%al C$%lone - T*C* .( In summer in tropical areas near thecoast" a lot o$ hot moist air rises rapidly. This can cause ane*tremely low pressure system &less than +,0 hectopascals' whichcan begin to spiral upwards. This suc#s up even more hot moistair to ma#e rain clouds and winds that create $ierce damagingstorms.

2,ESTIONS

1. In the tables below" describe or draw symbols on weather mapsthat indicate a particular weather type/

WEATHERTYPE

IN"ICATORS ON WEATHER +AP

ine dryweather

1.

indy weather 1.

2.

loudyweather

1.

2.

4ainy weather 1.

2.

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2. oo# at the two weather maps below. or each map" write thetype o$ weather e*pected in each city in the table below.

CITY WEATHER E3PECTE" IN +AP 4

airns

5risbane

6ydney

7elbourne

)delaide

8erth

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CITY WEATHER E3PECTE" IN +AP 5

airns

5risbane

6ydney

7elbourne

)delaide

8erth