# How To Read Aviation Weather Time?

## 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 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.

## 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.

## How long is a 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.

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## What does 9999 mean on 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 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 V mean in Metar?

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

## How do you read the rain forecast?

Whenever measurable rainfall is forecast, this field is represented as a range between two values (otherwise it will appear as ‘0 mm’). The first value means the location has a 50% chance of receiving at least that amount of rain. The second represents a 25% chance of receiving at least that amount.

## 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.

## 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.

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## 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.

## 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.