Average Relative Humidity Chart
This chart depicts the average relative humidity between the surface and
500mb (18,000ft). An average relative humidity of 50% or greater is quite
frequently associated with areas of clouds and possibly precipitation.
0000 and 1200 UTC
Surface and upper air observations, computer models
Individual observations are depicted in white. At each station, the relative
humidity value is plotted above a symbol. See the table below for an interpretation
of the symbols.
||Relative Humidity less than 50%
||Relative Humidity greater than or equal to 50%
||All significant observations missing
||Some mandatory observations missing
||Some mandatory and significant observations missing