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Thermal
Subtropical climate
(See: Warm temperate climate.)
Subtropical high
A semi-permanent region of high pressure air that forms just polewards of the tropics at the horse latitudes. Such highs form mainly over the oceans and are
some of the most durable features of the yearly circulation. Most of these highs have names (for example, Azores–Bermuda high in the North Atlantic).
isobars and also weather fronts. It is used for short-term predictions a few days ahead.
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Temperate climate
A climate in which the main seasonal changes are due to temperature, but there is no long, cold winter.
Temperate also means a lack of extremes, so temperate climates are usually found in coastal locations under the influence of moderating onshore winds.
There are cool temperate climates and warm temperate climates.
Temperature
The amount of heat present, measured using a thermometer and shown by a scale using °C (degrees Celsius). Weather reports normally give the temperature of the air measured in the shade.
Thermal
An upwards-moving flow of warm air caused by ground heating. Most cumulus clouds form as a result of thermals.
Subtropics
The region on the polewards side of the tropics. The subtropics are also sometimes known as warm temperate regions.
(For weather features of the subtropics see: Anticyclone; Azores–Bermuda high; Hot dry climate; Pacific high; Subtropical high; Trade winds; Warm temperate climate.)
Sunshine
For weather purposes, it is the heat energy from the Sun.
Supercells
Regions, usually over the warm oceans near the equator, in which clusters of thunderstorms form and eventually produce tropical cyclones.
Synoptic chart
Often known commonly as a ‘weather chart’, it is the map that weather forecasters use to help predict and explain the weather. It shows the pattern of
 Synoptic chart – A synoptic chart shows the pattern of highs and lows. It is used for short-term weather forecasting. It is the type seen on news channels.
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