The 300 mb map defines the jet stream position. The 500 mb map illustrates the positions of and shortwaves, which help produce cloudiness and precipitation. The 850 mb map can be used to indicate where temperature and moisture advection are occuring. Soundings illustrate the change in temperature, dewpoint, and winds in a column through the atmosphere. Wind profilers show the same column of winds changing through time.
Water vapor shows the percentage of water vapor existing through the atmosphere.
Nexrad Surface maps display various surface parameters such as pressure, temperature, and dewpoint temperature. Lows, highs, and fronts are drawn on some maps to indicate varying surface conditions. U. S. Forecast Maps These maps display computer model forecasts of upper air and surface conditions from 12 hours to 10 days ahead based on the initial time. Data is usually available 5-6 hours after the initial time. These maps show the position of fronts and probable areas of precipitation 12 and 24 hours from the initial time.