Weather Map Front Symbols
Occluded front a composite of two fronts formed as a cold front overtakes a warm or quasi stationary front.
Weather map front symbols. One of the first coded pieces of data you might notice on a weather map is a 4 digit number followed by the letters z or utc usually found at the map s top or bottom corner this string of numbers and letters is a timestamp. Cold front a zone separating two air masses of which the cooler denser mass is advancing and replacing the warmer. On weather maps the surface position of the cold front is marked with the symbol of a blue line of triangle shaped pips pointing in the direction of travel and it is placed at the leading edge of the cooler air mass. Cold polar air has low thickness and values of 528 dam or less frequently bring snow to the uk.
A warm front is depicted by a red line with half moons located on the side of the direction of its motion. It tells you when the weather map was created and also the time when the weather data in the map is valid. Stationary front a front between warm and cold air masses that is moving very slowly or not at all. Cold fronts represent the boundary between cold and warm air masses with the colder air behind the front.
The weather map symbol for a cold front is a blue curved line with blue triangles. Weather charts commonly show contour lines of 1 000 500 hpa thickness which represent the depth in decametres where 1 dam 10 m of the layer between the 1 000 hpa and 500 hpa pressure levels. Weather fronts these are also called front line boundaries and they represent the line of separation between hot and cold air masses which are present in either high or low pressure areas. The triangles point in the direction the cold air is moving.
Warm front a transition zone between a mass of warm air and the cold air it is replacing. Two types of occlusions can form depending on the relative coldness. Conversely warm tropical air has high thickness and values in excess of 564 dam across the uk often indicate a heatwave. Cold fronts come in association with a low pressure area.
Generally cold fronts move west to east across the usa. Severe alerts safety preparedness hurricane central. Weather in motion radar maps classic weather maps regional satellite. Top stories video slideshows climate news.
A warm front can initially bring some rain followed by clear skies and warm temperatures. A blue line with points indicating the direction of movement. Like cold front warm fronts also extend from the center of low pressure areas but on nearly always on the east side of the low. Warm front a warm front is the leading edge of a relatively warmer air mass replacing a colder air mass.
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