T

Temperature – a measure of the warmth or coldness of an object or substance with reference to a standard value.

Thunder – the sound caused by a lightning stroke as it heats the air and causes it to rapidly expand.

Thunderstorm – a storm with lightning and thunder produced by a Cumulonimbus cloud, usually producing gusty winds, heavy rain and sometimes hail. In Australia, they are described to be usually short-lived and hit on only a small area.

Tilted storm or tilted updraft – a thunderstorm or cloud tower which is not purely vertical but instead exhibits a slanted or tilted character. It is a sign of vertical wind shear, a favorable condition for severe storm development.

Today – until sunset.

Tomorrow – midnight to midnight.

Tonight – sunset to midnight.

Tornado – a violent rotating column of air, in contact with the ground, pendant from a cumulonimbus cloud. A tornado does not require the visible presence of a funnel cloud. It has a typical width of tens to hundreds of meters and a lifespan of minutes to hours.

Trade winds – persistent tropical winds that blow from the subtropical high pressure centers towards the equatorial low. They blow northeasterly in the northern hemisphere.

Tropical storm – an organized low pressure system in the tropics with wind speeds between 38 and 74 miles per hour. In Australia, it is a term used in the northern hemisphere for a tropical cyclone.

Tropical storm warning – a warning issued when sustained winds of 39 to 73 miles per hour (34 to 63 knots) are expected within 24 hours.

Trough – a warning issued when sustained winds of 39 to 73 mph (34 to 63 knots) are expected within 24 hours. In Canada, it is described as an elongated area of relatively low pressure extending from the centre of a region of low pressure.

Trough – a warning issued when sustained winds of 39 to 73 mph (34 to 63 knots) are expected within 24 hours. In Canada, it is described as an elongated area of relatively low pressure extending from the centre of a region of low pressure.

Turbulence – a warning issued when sustained winds of 39 to 73 miles per hour (34 to 63 knots) are expected within 24 hours.

Twister – a colloquial term for a tornado.

Typhoon – a hurricane that forms in the Western Pacific Ocean. It is a term used in Australia for a tropical cyclone in the northwestern Pacific with maximum winds above 117 kilometers per hour (63 knots).