Weather Maps Mr. Bradley's

The pressure pattern will always show you a number of things – we always have areas of high pressure (H) and areas of low pressure (L) and the white lines that circulate around, show where the pressure is equal. They are called isobars.

A high pressure system is a condition where the pressure in the atmosphere is higher than the surrounding area. A low pressure system On the other hand, a low pressure system is a condition in which the pressure in the atmosphere is lower than the pressure on the surface of the earth.

When air moves from areas of high pressure to area of low pressure and try and maintain that balance or to try and ease that difference, than there is air moving around and we feel wind moving.

Meteorologists must look at data that come from different sources. Meteorologist use many kinds of advanced technologies to gather this data. These technologies are found at ground stations and in balloons, aircraft, and satellites.

Weather balloons are the primary source of data above the ground. They provide valuable input for computer forecast models, local data for meteorologists to make forecasts and predict storms, and data for research.

Land-based observations are collected from instruments sited at locations on every continent. They include temperature, dew point, relative humidity, precipitation, wind speed and direction, visibility, atmospheric pressure, and types of weather occurrences such as hail, fog, and thunder.

Land-based observations are collected from instruments sited at locations on every continent. They include temperature, dew point, relative humidity, precipitation, wind speed and direction, visibility, atmospheric pressure, and types of weather occurrences such as hail, fog, and thunder.

Warm Front

A warm front is a boundary between two air masses, one cool and the other warm, moving so that the warmer air replaces the cooler air. A warm front is represented as a red line with half circles pointing toward the direction on movement.

Vertical air is drawn in the middle of low pressure area because air is “lighter”. Winds move toward low pressure and counter clockwise. In horizontal air is moving into the low. Usually associated with cloudy and breezy condition. Precipitation accompany many low pressure systems.