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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 - Ottapalam Distância
Cochim Aeroporto 16.6 km
Willingdon 24.2 km
Alappuzha 32.3 km
Udhagamandalam 44.0 km
Maiçor 54.4 km
Calecute 66.2 km
Coimbatore/Peelamedu 76.4 km
Madikeri 83.2 km
Tiruvanantapura Aeroporto 87.5 km
Chitradurga 91.0 km
Bangalor 146.2 km
Bangalore / Hindustan 154.3 km
Palayamkottai 162.1 km
Anantapur 170.2 km
Mangalore/Bajpe 175.5 km
Madurai 193.6 km
Salem 201.5 km
Honnavar 235.0 km
Arogyavaram 246.7 km
Tiruchirappalli Intl. Airport 261.6 km
Baticalá 273.3 km
Kadapa 288.5 km
Vellore 313.9 km
Pamban 319.1 km
Minicoy / Lakkadiven 365.2 km
Hanimaadhoo 375.0 km
Cuddalore 379.2 km
Karaikal 385.9 km
Negapatão 387.8 km
Putalão 390.9 km
Mannar 397.2 km
Katunayake 399.9 km
Colombo 399.9 km
Colombo 401.6 km
Aminidivi 404.6 km
Jafanapatão 407.1 km
Nellore 411.1 km
Aeroporto Internacional de Chennai 427.8 km
Galle 441.4 km
Kurunegala 451.2 km
Anuradapura Aeroporto 454.0 km
Ratnapura 457.9 km
Maha Illuppallama 460.1 km
Vavuniya 462.2 km
Cândia 480.8 km
Nuwara Eliya 496.7 km
Bandarawela 520.8 km