What does a trough mean on a weather map?
elongated area of relatively low pressure
A trough is an elongated area of relatively low pressure extending from the center of a region of low pressure. Air in a high pressure area compresses and warms as it descends. This warming inhibits the formation of clouds, meaning the sky is normally sunny in high-pressure areas. But haze and fog still might form.
What is a trough in weather bom?
Troughs. A trough appears on the weather map as a dashed blue line on the chart. It is an elongated area where atmospheric pressure is low relative to its immediate surroundings. Like cold fronts, troughs separate two different air masses (usually more moist air on one side and drier air on the other).
What is a trough line?
A line along which pressures are lower than in the surroundings and where the cyclonic curvature of the isobars is a maximum.
What are the 4 weather symbols?
Lesson Summary Basic weather symbols include: Sunny skies. Partly cloudy. Cloudy.
What is the meaning of trough in geography?
A trough is an elongated region of relatively low atmospheric pressure without a closed isobaric contour that would define it as a low pressure area. Since low pressure implies a low height on a pressure surface, troughs and ridges refer to features in an identical sense as those on a topographic map.
How does a trough differ from a front?
A front pushes air upward, and if there is a trough overhead, the air goes up into the trough. If that air in front of that trough has significant amounts of moisture, that moisture collects as clouds, with those clouds sometimes dropping rain as they pass.
What is a low trough?
What is the meaning of monsoon trough?
Monsoon Trough is an elongated low-pressure area which extends from heat low over Pakistan to Head Bay of Bengal. This is one of semi-permanent feature of monsoon circulation. Monsoon trough may be a characteristic of east west orientation of Himalayan ranges and north south orientation of Khasi-Jaintia Hills.
What is a blocking pattern in weather?
Blocking patterns occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather systems from moving through. When the blocking pattern is in place other systems are forced to go around it.
What weather symbols mean?
noun A conventional sign used in meteorological records, or in published meteorological observations or weather-maps, to represent graphically any designated phenomenon.
What are weather icons?
The following weather icons are used to represent the current weather conditions and weather forecast of the cities. The nighttime version of weather icons will be used when the observation time of current weather is at night in local time.