Weather Depiction Chart

Description:

This product depicts surface observation reports of Low Instrument Flight Rules (LIFR), Instrument Flight Rules (IFR), Marginal Visual Flight Rules (MVFR), and Visual Flight Rules (VFR) conditions.

Issuance:

Every 30 minutes

Data Sources:

Surface observations

Depiction:

Magenta dots indicate LIFR condtions.
Red dots indicate IFR conditions
Blue dots indicate MVFR conditions
Green dots indicate VFR conditions

Definition:

LIFR	Ceilings below 500 ft and/or visibility less than 1 mile
IFR	Ceilings less than 1000 ft and/or visibility less than 3 miles
MVFR	Ceilings between 1,000 and 3,000 ft and/or visibility between 3 and 5 miles
VFR	Ceilings greater than 3,000 ft and visibility greater than 5 miles