Synoptic Weather Stuff *G11 Flashcards
Random disclaimer
Pls read over the visual stuff as well
What’s a synoptic weather map
A map showing weather conditions for a particular time on a particular day
Isobar definition
Lines that join all places of equal pressure
What is atmospheric pressure measured in
Hectopascals (hPa)
What does the spacing of isobars indicate
The steepness of a gradient
What do close isobars indicate and what do isobars that are apart indicate *2
*close isobars = steep pressure + strong winds
*apart isobars = gentle pressure + light winds
Ridge definition
High pressure
Extending outwards
To low pressure
Trough definition
Low pressure
Extending outwards
To high pressure
Another name for high pressure cells
Anticyclone
Pressure _____ outwards a high pressure cell
Decreases
Because of CF, in
what direction do winds in a high pressure cell
blow in the southern hemisphere and northern hemisphere
SH- anticlockwise
NH- clockwise
High pressure cells indicate ___ weather
Changeable weather
Front definition
Zone where 2 air masses
Of different air masses
Meet
Pressure____ outwards in a low pressure cell
Increases
Because of CF, in what direction do winds blow
In low pressure cell
Rotate in
Northern and Southern hemisphere
*clockwise in SH
*anticlockwise in NH
What type of weather does low pressure cells indicate
Changeable weather
What types of fronts are associated with low pressure cells
Cold and warm fronts
What are cold and warm fronts signs of
Changeable weather
With wind, clouds and rain
What is a cold front
A boundary between approaching cold air and the warm air ahead of it
What is a Warm front
A boundary between approaching Warm air and the cold air that lies ahead of it
What are mid latitude cyclones
A low pressure system
with cyclonic rotation (anticyclone)
That is found in the middle latitudes
(30-50*N)
