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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 - Ramanathapuram Vzdálenost
Tiruchirappalli Intl. Airport 32.3 km
Pamban 44.6 km
Madurai 81.2 km
Vélúr 84.1 km
Sélam 88.3 km
Arogyavaram 97.8 km
Puttalam 116.5 km
Cuddalore 116.8 km
Karaikal 117.6 km
Nákappattinam 118.6 km
Palayamkottai 119.6 km
Mannar 122.7 km
Katunayake 127.1 km
Kolombo 127.9 km
Kolombo 129.8 km
Jápané 133.7 km
Bangalore / Hindustan 151.9 km
Bengalúr 159.8 km
Letiště Čennaí 169.0 km
Galle 169.8 km
Kurunegala 176.7 km
Anuradhápura Letiště 179.3 km
Ratnapura 184.3 km
Maha Illuppallama 185.4 km
Vavuniya 187.8 km
Coimbatore/Peelamedu 200.4 km
Kandy 206.2 km
Tiruvanantapuram Letiště 208.8 km
Nuwara Eliya 222.1 km
Óttakamandu 236.8 km
Maisúr 245.5 km
Bandarawela 246.2 km
Badulla 252.9 km
Hambantota 265.4 km
Alappuzha 267.2 km
Kóčin Letiště 269.5 km
Trincomalee 271.3 km
Willingdon 284.2 km
Batticaloa 322.4 km
Pottuvil 338.9 km
Kóžikkót 340.8 km
Madikeri 351.2 km
Mangalore/Bajpe 446.8 km