Quick Answer: What Does Pcbn Mean In An Aviation Forecast?

How do you read a TAF forecast?

The date and time are formatted using two sets of four digits each with the first two digits representing the day of the month and the second two the 24-hour time in hours only (no minutes since TAFS are issued on the hour). The first set of digits is the start date/time and the second is the end date/time.

What does BKN mean in weather?

BKN – Broken cloud layer 5/8ths to 7/8ths. CB – Cumulonimbus. CLR – Sky clear at or below 12,000AGL. FEW – Few cloud layer 0/8ths to 2/8ths. OVC – Overcast cloud layer 8/8ths coverage.

What does E stand for in visibility?


Visibility index Visibility in metres
M (Medium) Between 4,001 and 10,000 metres
G (Good) Between 10,001 and 20,000 metres
VG (Very Good) Between 20,001 and 40,000 metres
E (Excellent) Greater than 40,000 metres

What does FM mean on a TAF?

FM is used when rapid changes are expected at the specified time, and is given in: TAF format: FMddhhmm, for example: FM301000 means from 1000 UTC on the 30th or.

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What does 9999 mean in a 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 does a TAF last?

Routine TAFs are valid for a 24-hour period and issued four times daily: 00Z, 06Z, 12Z, and 18Z, and are amended (updated) as conditions require.

What does P mean in Metar?

P. indicates greater than the highest reportable value. PCPN. precipitation.

What is the T at the end of a Metar?

The “0” after the ” T ” indicates that the temperature and dew point are higher than 0 degrees Celsius (a “1” will follow the ” T ” when the dew point temperature and /or the temperature is / are less than 0 degrees Celsius).

What does R88 mean?

Review Engagements. Self-employed ( R88 ) Income Statement: The income statement serves to measure a company’s sales (or revenue), expenses and earnings over a specified duration of time. In many cases, this statement will usually be for a period of one year.

What does TX mean in TAF?

TX – Indicator for Maximum temperature. TtTt – Temperature value in Celsius. TN – Indicator for Minimum temperature. HH – Forecast hour, i.e. the time(hour) when the temperature is expected.

What is the weather symbol for wind?

Wind Speed & Direction Calm wind is indicated by a large circle drawn around the skycover symbol. One long barb is used to indicate each 10 knots with the short barb representing 5 knots.

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What does visibility mean?

1: the quality or state of being visible. 2a: the degree of clearness (as of the atmosphere or ocean) specifically: the greatest distance through the atmosphere toward the horizon at which prominent objects can be identified with the naked eye.

What does VCSH mean in a TAF?


METAR Code Description
VCTS Vicinity thunderstorm
VIRGA Virga or precipitation not hitting ground
VCSH Vicinity showers
TS Thunderstorm with or without precipitation


What does Qnh mean on a TAF?

The QNH is the atmospheric pressure corrected to mean sea level (based on International Standard Atmosphere conditions throughout the height difference) and is reported in the METAR rounded down to the nearest whole hectopascal. Some aerodromes report the QNH pressure in the METAR in inches of mercury.

How do you write a TAF?


  1. TAFs are issued in the following format: [Type of Report] [ICAO Station Identifier] [Date and Time of Origin] [Valid Period Date and Time] [Forecast Meteorological Conditions]
  2. Forecast date and time of origin in the TAF are depicted in two ways:
  3. TAFs use the same codes as METAR weather reports.

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