High altitude SIGWX charts are valid at specific fixed times: 0000, 0600, 1200, and 1800 UTC. They show significant en-route weather phenomena over a range of flight levels from 250 to 600, and associated surface weather features.
SIGWXSignificant WeatherSingle Cell ThunderstormThis type of thunderstorm develops in weak vertical wind shear environments. On a hodograph, this would appear as a closely grouped set of random dots around the center of the graph.
Aviation High Altitude Significant Weather Forecasts High Altitude Significant Weather (SIGWX) forecasts are provided for the en-route portion of international civil aeronautical operations.
and expensive, but worth the outlay, as much of the basic meteorology contained therein doesn't change radically. Note that it also includes useful information on decoding SYNOP, METAR and TAF data, and a guide to interpretation of Aviation SIGWX ...
 See also: Layer, Earth, Synoptic, Wind, Pollution
  
|
RSS
