This message is composed with data measured semi-continuously at our automatic weather stations at the airports of the different islands. These data are originally meant to be used for making an hourly message for the aviation, namely the METAR. However, it can also be used by the public to monitor the current weather conditions for the  airports on the different islands. All weather conditions with the exception of the cloud coverage and the visibility are being measured automatically. The visibility and cloud coverage is entered manually every hour by a weather observer on the different islands. Please do note that these are point observations and may not always represent the weather at a different location on the islands.

Clouds
In this report only clouds that are significant for the aviation are mentioned. These significant clouds are clouds where the bottom part (cloud base) has a height of 1500 m (5000 ft) or less. The amount of clouds in the sky, i.e. the cloud coverage, is given in parts of 8. The following groups can be identified:

FEW 1/8-2/8
SCATTERED 3/8-4/8
BROKEN 5/8-7/8
OVERCAST 8/8
                    


If no clouds can be detected with their lowest part below 1500 m (5000 ft) this shall be reported as No Significant Clouds. Some of our weather stations are equipped with an automatic observing system. An automatic observing system can only detect clouds that drift over it. When no clouds are detected by this system, it shall be reported as No Clouds Detected. This doesn't mean that there aren't any clouds in the sky, it only states that the observing system did not detect any clouds.

Visibility
The visibility given in this report is the prevailing visibility, and is measured as follows. The sky is divided in four sections. For each section the visibility is calculated. The visibility given in this report will be that one more often present in the quadrants.

Temperature
The temperature given here is the temperature measured at the airport, near the runway. This value may differ between locations due to local effects.

Humidity
The humidity or formally known as the relative humidity represents the current amount of water vapor present in the atmosphere relative to the maximum amount of water vapor the atmosphere can carry at that specific temperature. This parameter has a clear diurnal variation due to its dependence on the current temperature. The higher the temperature, the more water vapor it can contain and hence the lower the relative humidity will be considering the same water vapor content for the atmosphere throughout the day.

Wind
The direction of the wind given here is the mean true direction from which the wind is blowing in degrees, whereas the wind speed is the mean speed of the wind over the 10-minute period immediately preceding the time of reporting. The wind direction and wind speed are measured at a height of 10 meters above the ground.

UV Index
The UV Index provides the expected risk of overexposure to the sun. The Index gives UV intensity levels on a scale of 1 to 11+, where 1 is a low risk of overexposure and 11+  implies an extreme risk. The UV index takes into accout clouds and other local conditions that affect the amount of UV radiation reaching the ground.

UV index Description Recommendations
0-2
 No danger  
3-5
 Small risk Wear sunglasses and use sunscreen, and wear a hat. Seek shade around midday when sun is most intense.
6-7
 High risk Wear sunglasses and use sunscreen with SPF 20 or higher. Wear a wide brim hat, and reduce time in the sun between 11:00-17:00 LT.
8-10
 Very high risk Wear sunglasses a hat and use sunscreen with SPF 40 or higher. Reduce time in the sun between 11:00-17:00 LT.
>11
 Extreme risk Take all above mentioned precautions and also cover the body with long sleeve shirts and trousers. Reduce time in the sun between 11:00-17:00 LT.