- 1 What does 9999 mean in Metar?
- 2 What does 9999 mean in aviation?
- 3 What are METARs and TAFS?
- 4 How are METARs generated?
- 5 What does P mean in Metar?
- 6 Are TAF Times in Zulu?
- 7 What does Cavok mean in aviation?
- 8 What does Metar mean in aviation?
- 9 What does TAF mean in aviation?
- 10 How long is a Metar valid?
- 11 How long is an Airmet valid for?
- 12 What does Shra mean in a TAF?
- 13 What does V mean in Metar?
- 14 What is a G Airmet?
- 15 What does ATIS stand for?
What does 9999 mean in Metar?
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.
What does 9999 mean in aviation?
Visibility 9999 means the visibility is greater than 10 km. / / means this part of the METAR is not available (ie cloud and visibility not available from an automated weather station)
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.
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 P mean in Metar?
P. indicates greater than the highest reportable value. PCPN. precipitation.
Are TAF Times in Zulu?
A “Z” follows the date and time grouping to remind pilots that like other aviation times, the time listed in the TAF is in UTC, or “ Zulu ” time, not local time.
What does Cavok mean in aviation?
CAVOK. 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. No CB or TCU and no cloud below 5000 feet or Minimum Sector Altitude (MSA) (whichever is the greater).
What does Metar mean in aviation?
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 does TAF mean in aviation?
The Terminal Area Forecast ( TAF ) is the official FAA forecast of aviation activity for U.S. airports. It contains active airports in the National Plan of Integrated Airport Systems ( NPIAS ) including FAA-towered airports, Federal contract-towered airports, non-federal towered airports, and non-towered airports.
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.
How long is an Airmet valid for?
AIRMETs are valid for six hours. NOTE: The definition has changed and no longer says “light aircraft”; AIRMETs are intended for all aircraft. AIRMET TANGO (Turbulence) moderate turbulence, sustained surface winds of 30 knots or greater, and/or non convective low−level wind shear.
What does Shra mean in a TAF?
1. The weather groups shall be constructed by considering columns 1 to 5 in the table above in sequence, i.e. intensity, followed by description, followed by weather phenomena, e.g. heavy rain shower(s) is coded as + SHRA 2. To denote moderate intensity no entry or symbol is used.
What does V mean in Metar?
V – Varying. VIRGA – Virga. VRB – Variable. VRB VIS – Variable Visibility. VV – Vertical Visibility, indefinite ceiling.
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.
What does ATIS stand for?
Automatic Terminal Information Service ( ATIS )