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In meteorology, the synoptic scale (also called the large scale or cyclonic scale) is a horizontal length scale of the order of 1,000 km (620 mi) or more. [1] This corresponds to a horizontal scale typical of mid-latitude depressions (e.g. extratropical cyclones ).
Surface wind direction and speed is also forecast on this type of chart. Wave prognostic charts show the expected sea state at some future time. [2] Low-level prognostic charts used by aviators show the forecast between the Earth's surface and 24,000 feet (7,300 m) above sea level over the next two days.
A surface weather analysis is a type of weather map that depicts positions for high and low-pressure areas, as well as various types of synoptic scale systems such as frontal zones. Isotherms can be drawn on these maps, which are lines of equal temperature. Isotherms are drawn normally as solid lines at a preferred temperature interval. [2]
A surface weather analysis for the United States on October 21, 2006. By that time, Tropical Storm Paul was active (Paul later became a hurricane). Surface weather analysis is a special type of weather map that provides a view of weather elements over a geographical area at a specified time based on information from ground-based weather stations.
Since the 2024–25 cyclone season, a subtropical system will be classified as a subtropical storm if it reaches wind speeds of 35 knots (65 km/h; 40 mph). [26] If the named tropical system intensifies further and reaches winds speeds of 48 knots (89 km/h; 55 mph), then it will be classified as a severe tropical storm.
[2] Although relatively straightforward to measure (visually, for instance, by using a mirror [ 3 ] ), oktas only estimate cloud cover in terms of the area of the sky covered by clouds. They do not account for cloud type or thickness, and this limits their use for estimating cloud albedo or surface solar radiation receipt.
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Pages in category "Synoptic meteorology and weather" The following 29 pages are in this category, out of 29 total. ... This page was last edited on 2 August 2024, at ...