We've guessed that you're not using a client that supports colored tables and have tried to compensate. This panel shows the 700 mb field for geopotential height, and vertical velocity. Geopotential height approximates the actual height of a pressure surface above mean sea-level and is represented by the solid white contours. The geopotential height field is given in meters with an interval of 30 meters between height lines. The locations of surface cyclones and anticyclones hold similar positions in the 700 mb geopotential height field.
Vertical velocity is the speed at which the air is rising or sinking.
Locations where air is rising are the locations most likely to produce precipitation. Instead of meters or miles, though, the distance measured is pressure. Remembering that pressure decreases as altitude increases, a relationship between pressure and altitude is established. Due to this relationship, a negative distance in pressure is actually a positive distance in altitude, hence a negative microbar distance is used here. 700 mb hum,winds Terms for using data resources.