Isobaric Patterns Of A Synoptic Weather Chart

Usually they are drawn at intervals of 2 or 4 millibars. With an understanding of how the air moves and how clouds and rain form, much prediction can be made by simply observing the sky overhead, observing wind direction and noting the temperature and humidity of the air. The first stage in preparing a synoptic chart is to chart the position of each meteorological station.

Isobars on a synoptic chart the meteorologist in drawing isobars has an additional aid in the plotted wind directions of each station. An anticyclone, also known as a ‘high’ can be identified on a weather chart as an often large area of widely spaced isobars, where pressure is higher than surrounding areas. The first stage in preparing a synoptic chart is to chart the position of each meteorological station.

In this video forecaster charlie explains what the symbols and lines mean and how he uses them to forecast the we.

A set of curved isobars surrounding an area of low pressure reveals a depression, with the wind in the northern hemisphere blowing anticlockwise around its centre. These charts show the surface pressure pattern using isobars (lines of equal pressure) and indicate areas of high (h) and low pressure (l) along with their central pressure value. It is the rotation of the earth which deflects moving air on course from high to low pressure. Usually they are drawn at intervals of 2 or 4 millibars.