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What are the sources for WeatherOnline forecasts?


The WeatherOnline forecasts are created by using a MOS system developed in-house with the most current US weather services model data (GFS). The statistical methods of the Model-Output-Statistic (MOS)-System were developed in cooperation with the Meteorological Department of the University of Bonn.

What is a MOS-System?


A Model-Output-Statistic (MOS)-System combines the data of the weather forecast model and the locally recorded data for any given point by transforming the model data from a coarse grid to detailed small scale areas.
In order to do so, one needs a large volume of past model forecast data as well as the corresponding recorded data for any given location. The MOS-System relates these two sets of data in an optimized fashion allowing development of the local weather forecast by using the most current model forecast.

What are the time intervals used in the temperature and icons of the local forecasts?


The forecasted maximum temperature always refers to a 12hour window from 6am to 6om local time.
The forecasted minimum temperature always refers to the 12hour window from 6pm of the day before the forecast day to 6 am of the forecast day.
The weather icon for the morning refers to the time between 6am and 12pm local time, the icon for the afternoon is valid from 12am to 6pm local time and the evening icon refers to the time from 6pm to 12am local time.

How often are the current weather conditions and forecasts updated?


The current weather information as well as the satellite images are updated every 30 minutes whereas the radar images are being updated every 15 minutes.
The local weather forecasts as well as the weather charts are updated 8 times a day. The updates start at 2 am CEST or 3 am CEST depending on daylight saving time and continue on a three hourly bases.


Nearby Weather Stations - Lerwick Distance
Lerwick 0.7 km
Sumburgh Cape 31.0 km
Scatsa/Shetland Island 35.8 km
Baltasound 78.0 km
Fair Isle 83.5 km
Kirkwall Airport 232.1 km
Wick 282.6 km
Wick 282.6 km
Aberdeen Airport 345.1 km
Statfjord 356.0 km
Lossiemouth 358.7 km
Gullfax Platform 370.0 km
Sule Skerry 377.1 km
Kinloss 383.0 km
Inverbervie 384.5 km
Aboyne 385.8 km
Tain Air Weapons Range 401.4 km
Gullfaks 402.0 km
Altnaharra 416.2 km
Inverness Airport 429.7 km
Cairngorms 432.4 km
Aviemore 439.8 km
Leuchars 457.7 km
Dundee/Riverside 457.7 km
Loch Glascarnoch 491.7 km
Strathallan 510.6 km
Tulloch Bridge 533.9 km
Glen Ogle 540.4 km
Aultbea 555.7 km
Aonach Mòr 559.7 km
Bealach na Bà 585.3 km
Oban Airport 621.7 km