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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.


Estações Meteorológicas Próximas - Sivagiri Distância
Palayamkottai 39.6 km
Tiruvanantapura Aeroporto 55.9 km
Coimbatore/Peelamedu 58.7 km
Madurai 76.3 km
Bangalor 89.9 km
Bangalore / Hindustan 91.4 km
Udhagamandalam 92.1 km
Salem 99.9 km
Maiçor 109.0 km
Alappuzha 111.5 km
Cochim Aeroporto 114.9 km
Willingdon 129.0 km
Tiruchirappalli Intl. Airport 148.5 km
Arogyavaram 155.3 km
Calecute 188.5 km
Pamban 200.4 km
Madikeri 203.7 km
Vellore 209.3 km
Cuddalore 267.0 km
Putalão 270.5 km
Karaikal 271.3 km
Negapatão 272.7 km
Colombo 278.3 km
Mannar 278.4 km
Katunayake 278.6 km
Colombo 279.9 km
Jafanapatão 289.5 km
Mangalore/Bajpe 297.7 km
Aeroporto Internacional de Chennai 318.0 km
Galle 319.5 km
Kurunegala 330.7 km
Anuradapura Aeroporto 334.6 km
Ratnapura 336.8 km
Maha Illuppallama 340.5 km
Vavuniya 343.4 km
Cândia 360.5 km
Nuwara Eliya 376.1 km
Bandarawela 400.3 km
Badulla 407.3 km
Hambantota 418.9 km
Triquinimale 427.0 km
Minicoy / Lakkadiven 475.8 km
Baticaloa 477.9 km
Hanimaadhoo 478.6 km
Pottuvil 494.0 km