Extended Weather Depiction Chart

Description:

This product provides a quick overview of sky conditions, ceilings, precipitation and obstructions-to-visibility for selected observation stations. In addition, areas of instrument flight rules (IFR) and marginal visual flight rules (MVFR) are outlined.

Issuance:

Hourly

Data Sources:

Hourly surface observations (human observers and automated stations)

Depiction:

Green shaded Areas indicate IFR conditions. Areas enclosed by a green line, but not shaded, indicate marginal VFR conditions. All other areas are VFR. The number of observations used to generate the report is printed on the left side of the chart.

In addition to the green shading, station observations are also plotted on the map in white. Each observation is depicted as follows:

Sky Coverage Symbols

Sky Clear

Scattered

Broken

Overcast

Sky obscured

Observation Missing

Common Precip and Obstruction Symbols

	Continuous Drizzle
	Continuous Rain
	Continuous Snow
	Light fog

Complete symbol list

Example: