Look up an image:
Explore by theme
station model ![click to hear : station model click to hear : station model](../../images/speaker-vert.gif)
Method of representing information collected by an observation station on a weather map using symbols and numbers.
air temperature ![click to hear : air temperature click to hear : air temperature](../../images/speaker-vert.gif)
Sensation of heat or cold (°C) measured using an open-air thermometer shielded from direct sunlight.
wind direction ![click to hear : wind direction click to hear : wind direction](../../images/speaker-vert.gif)
Wind direction is indicated by the position of the wind shaft.
present state of weather ![click to hear : present state of weather click to hear : present state of weather](../../images/speaker-vert.gif)
Type of precipitation (present weather) noted at the moment of observation.
temperature of dew point ![click to hear : temperature of dew point click to hear : temperature of dew point](../../images/speaker-vert.gif)
Temperature (°C) at which water vapor in the air begins to condense; it is used to calculate humidity in the air.
type of low cloud ![click to hear : type of low cloud click to hear : type of low cloud](../../images/speaker-vert.gif)
Type of cloud observed between ground level and an altitude of 2,000 meters.
pressure change ![click to hear : pressure change click to hear : pressure change](../../images/speaker-vert.gif)
Positive or negative value that corresponds to the difference between the pressure reading and sea-level pressure; it is expressed in millibars.
barometric tendency ![click to hear : barometric tendency click to hear : barometric tendency](../../images/speaker-vert.gif)
Variation in atmospheric pressure during the three hours preceding observation.
sky coverage ![click to hear : sky coverage click to hear : sky coverage](../../images/speaker-vert.gif)
Proportion of the sky covered with cloud.
sea-level pressure ![click to hear : sea-level pressure click to hear : sea-level pressure](../../images/speaker-vert.gif)
Reference pressure that corresponds to the pressure observed at sea level; it is expressed in millibars.
station circle ![click to hear : station circle click to hear : station circle](../../images/speaker-vert.gif)
Circle on a weather map that represents an observation station; displayed around the circle is the information collected by the station.
type of middle cloud ![click to hear : type of middle cloud click to hear : type of middle cloud](../../images/speaker-vert.gif)
Type of cloud observed at altitudes between 2,000 and 6,000 meters.
type of high cloud ![click to hear : type of high cloud click to hear : type of high cloud](../../images/speaker-vert.gif)
Type of cloud observed at altitudes higher than 6,000 meters.
wind speed ![click to hear : wind speed click to hear : wind speed](../../images/speaker-vert.gif)
Wind speed is expressed in km/h; it is indicated by barbs and pennants whose values must be added.