Primary Industries

Home > Primary Industries > Primary Industries (240 hours) > Compulsory units > Observe and report on weather > Observe and report on weather

Storms

Thunderstorms develop when air masses become unstable. In summer, late afternoon storms result from the uneven heating of air masses near the earth’s surface. The hot air rises, forming typically shaped clouds called ‘anvil heads’.

Water droplets in the cloud are moved up and down and may freeze forming hail. Massive static electric charges build up in the cloud. The electricity is discharged as lightning. Super heating and expansion of air as lightning passes through it produces thunder.

Thunderstorms also occur when cold fronts lift warm moist air and when air masses are forced over mountains. In south-eastern Australia thunderstorms are more common in spring and summer.

Snow flakes are water droplets that have frozen into ice crystals. If the air temperature is cold enough to prevent them melting they fall as snow. Cold fronts bring snow storms to mountainous regions in southern Australia.

Possible risks and suggested strategies to reduce harm

Lightning strike

If possible shelter in a house, shed or vehicle.
If not, move to low ground.
DO NOT shelter under trees or stand on high ground.

Hail

Shelter under a permanent structure or remain in the vehicle.

Snow

Remain indoors during blizzards.
Wear adequate warm clothing, including beanie and gloves and a wind-proof coat.

Back to The weather at work

Back to Observe and report on the weather