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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.


Poblíž povětrnostní stanice - Aruppukkottai Vzdálenost
Madurai 7.4 km
Palayamkottai 41.4 km
Sélam 49.7 km
Tiruchirappalli Intl. Airport 75.8 km
Bangalore / Hindustan 92.9 km
Bengalúr 98.2 km
Arogyavaram 101.9 km
Coimbatore/Peelamedu 120.6 km
Pamban 126.3 km
Tiruvanantapuram Letiště 128.6 km
Vélúr 140.2 km
Óttakamandu 157.1 km
Maisúr 168.1 km
Alappuzha 185.5 km
Kóčin Letiště 187.8 km
Cuddalore 193.4 km
Karaikal 197.1 km
Puttalam 197.3 km
Nákappattinam 198.4 km
Willingdon 202.5 km
Mannar 204.4 km
Katunayake 206.5 km
Kolombo 206.7 km
Kolombo 208.4 km
Jápané 215.2 km
Letiště Čennaí 244.8 km
Galle 248.3 km
Kurunegala 257.7 km
Kóžikkót 259.7 km
Anuradhápura Letiště 260.9 km
Ratnapura 264.4 km
Maha Illuppallama 266.9 km
Vavuniya 269.5 km
Madikeri 271.5 km
Kandy 287.3 km
Nuwara Eliya 303.1 km
Bandarawela 327.3 km
Badulla 334.1 km
Hambantota 346.2 km
Trincomalee 353.0 km
Mangalore/Bajpe 366.9 km
Batticaloa 404.1 km
Pottuvil 420.5 km