- 1 How do you decode a Metar?
- 2 How do you read an aviation Metar?
- 3 What do the numbers at the end of a Metar mean?
- 4 What are Metars and TAFS?
- 5 What does 9999 mean in TAF?
- 6 How long is a Metar valid?
- 7 Is Metar AGL or MSL?
- 8 What does Cavok mean?
- 9 What does V mean in Metar?
- 10 What distance does a Metar cover?
- 11 What does Metars stand for?
- 12 What is a G Airmet?
- 13 How are METARs generated?
- 14 What does SLP mean in a Metar?
How do you decode a Metar?
To decode, place a “10” or “9” before the first digit (use a 9 if the 3-digit value is 500 or more), and place a decimal point before the last digit. The sea level pressure remark in the above example would read “current sea level pressure of 1003.4 millibars.”
How do you read an aviation Metar?
The first two digits are the date, the 16th of the month, and the last four digits are the time of the METAR, which is always given in coordinated universal time (UTC), otherwise known as Zulu time. A “Z” is appended to the end of the time to denote that the time is given in Zulu time (UTC) as opposed to local time.
What do the numbers at the end of a Metar mean?
The first three numbers, “350” indicate the wind direction it’s coming from. The next two numbers, “45” indicate the wind speed in knots. The number after the slash is the time after the hour. The “20” in this case means the peak wind happened at 20 past the hour.
What are Metars and TAFS?
METAR stands for Meteorological Aerodrome Report. TAF stands for Terminal Aerodrome Forecast. It is a report released by large airports that summarizes the weather forecast for the area covered by five statute miles from the location of the airport.
What does 9999 mean in TAF?
9999. This value represents a visibility greater than 9000. meters (7 SM or more). The contraction CAVOK (ceiling and visibility OK) may be used when there is no significant weather, the visibility is 10 km or greater, and the ceilings are greater than 5,000 ft.
How long is a Metar valid?
Validity: Issued every hour, usually 55~59 past the hour. Data may be up to 15 minutes old, should not be older. Valid for 1 hour or until the next released report.
Is Metar AGL or MSL?
Height is important, especially in the mountains. Remember, METAR and TAF report the height of clouds AGL, not MSL.
What does Cavok mean?
The Visibility, Cloud, and Weather groups are replaced by the term CAVOK (cloud and visibility OK) when the following conditions exist simultaneously: Visibility is 10km or more.
What does V mean in Metar?
V – Varying. VIRGA – Virga. VRB – Variable. VRB VIS – Variable Visibility. VV – Vertical Visibility, indefinite ceiling.
What distance does a Metar cover?
An automated METAR with no human supervision covers the conditions within approximately 6 inches of the weather station reporting it (for example, a badly positioned AWOS/ASOS station may be shielded from wind in some directions which affects what it reports).
What does Metars stand for?
METAR is the international standard code format for hourly surface weather observations which is analogous to the SA coding currently used in the US. The acronym roughly translates from French as Aviation Routine Weather Report.
What is a G Airmet?
A G – AIRMET is a graphical advisory of weather that may be hazardous to aircraft, but are less severe than SIGMETs. They are only valid at specific time “snapshots”. Forecasters create graphical objects depicting the areas and attributes of AIRMET hazards, which are distributed in BUFR file format.
How are METARs generated?
Origin. METARs typically come from airports or permanent weather observation stations. Reports are generated once an hour or half-hour at most stations, but if conditions change significantly at a staffed location, a report known as a special (SPECI) may be issued. (Such as KPLU which reports 3 per hour.)
What does SLP mean in a Metar?
Let’s take a look at what these abbreviations represent, starting with the “ SLP ” notation that comes after any comments in the “remarks” section of a METAR: SLP stands for sea-level pressure, with the pressure expressed in millibars.