Surface weather map symbols. Arrow from arrow indicating where lowhigh came from 24 hours prior to valid time on some surface maps an arrow will mark the place where a low or high pressure system was located 24 hours prior to the valid time indicated on the chart. No items to display. A line with all circles signifies a warm front and the dry cool air that comes with it. Weather map symbols abbreviations and features.
Weather map symbols abbreviations and features. 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. In addition a line with circles and triangles on the same side shows an occluded front where a cold front overtakes a warm front to cause a variety of events including. City zip or place.
Temp f weather dewpoint f pressure mb sky cover wind kts data at surface station temp 45 0f dewpoint 29 0f overcast wind from se at 15 knots. Surface pressure charts showing pressure and weather fronts are provided up to five days ahead for europe and the north east atlantic. A weather map displays various meteorological features across a particular area at a particular point in time and has various symbols which all have specific meanings. Table of contents 1.
The definitions provided below are derived from the national weather service glossary. Such maps have been in use since the mid 19th century and are used for research and weather forecasting purposes. Here is an introduction to weather maps. A weather map and its symbols are meant to convey a lot of weather information quickly and without using a lot of words.
Much like how equations are the language of mathematics weather symbols are the language of weather so that anyone looking at a map should be able to decipher the same exact information from it. To read a weather map understand that a line with all triangles symbolizes a cold front which will bring humidity and possibly rain.