Quick Answer: How To Read Aviation Weather Reports?

How do I decode a metar report?

Decoding a METAR

  1. PHNL = the airfield, Honolulu’s Daniel K.
  2. 250953Z = the date and time of the report.
  3. 05007G17KT = the wind conditions.
  4. 10SM = visibility.
  5. FEW024 / FEW040 = cloud cover.
  6. 27/19 = the temperature and dewpoint.
  7. A3001 = the atmospheric pressure, a.k.a. altimeter setting.

How do you read the weather report?

Here are some typical expressions used in a weather report:

  1. a high of twenty degrees.
  2. a low of -25.
  3. 20 percent chance of snow.
  4. mainly sunny.
  5. sunny with cloudy periods.
  6. record high/low.
  7. above/below average temperatures.
  8. a few flurries.

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.

How do I read a Metar map?

Static METAR Plots

  1. Temp – Temperature plotted in the upper left in Fahrenheit.
  2. Windbarb – The wind barb.
  3. Alt – Last three digits of the altimeter setting plotted upper right in inches Hg.
  4. Id – The last 3 letters of the ICAO identifier for the site.
  5. Dew – The dewpoint temperature plotted in the lower left in F.
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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.

What does V mean in Metar?

V – Varying. VIRGA – Virga. VRB – Variable. VRB VIS – Variable Visibility. VV – Vertical Visibility, indefinite ceiling.

Is 20 degrees Celsius hot or cold?


Temperature ° C What might be at this temperature How it feels
10 Cold
15 Cool
20 Room indoors Warm
25 Warm room Warm to hot


Why is called forecast?

A storm in 1859 that caused the loss of the Royal Charter inspired FitzRoy to develop charts to allow predictions to be made, which he called ” forecasting the weather”, thus coining the term “weather forecast “. The first daily weather forecasts were published in The Times in 1861.

How do I read Apple weather app?

View conditions in the Weather app To see weather conditions by the hour, swipe left to right in the hourly forecast. You can also scroll down to see details, like the weekly overview, chance of rain, and air quality.

What does P mean in Metar?

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

How much area 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).

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How long is TAF valid?

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.

Where is the altimeter setting on a Metar?

Parameter Output. Here is a list of the parameters that can be displayed: station model – This is a standard station model with temperature in the upper left, dewpoint in the lower left, coded altimeter setting in upper right, visibility far left, weather near left, cloud cover colored by flight category and wind barb.

How do you read aviation wind symbols?

The dot end of the staff is where the wind is blowing to, while the top of the staff shows the direction from which the wind is coming. The top row of wind barbs in the figure to the right all indicate a north wind. The dot is to the south and the top of the wind barb staff is to the north.

What is on Metar?

A typical METAR contains data for the temperature, dew point, wind direction and speed, precipitation, cloud cover and heights, visibility, and barometric pressure. The complement to METARs, reporting forecast weather rather than current weather, are TAFs. METARs and TAFs are used in VOLMET broadcasts.

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