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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 - Karaikal Vzdálenost
Karaikal 0.0 km
Nákappattinam 3.5 km
Cuddalore 18.3 km
Jápané 32.0 km
Mannar 39.0 km
Letiště Čennaí 56.0 km
Puttalam 56.6 km
Nellúru 70.9 km
Katunayake 73.7 km
Pamban 76.2 km
Kolombo 78.8 km
Kolombo 80.5 km
Anuradhápura Letiště 81.5 km
Vavuniya 84.9 km
Vélúr 86.2 km
Maha Illuppallama 88.4 km
Kurunegala 88.8 km
Ratnapura 102.5 km
Galle 103.3 km
Kandy 111.8 km
Tiruchirappalli Intl. Airport 124.3 km
Nuwara Eliya 127.6 km
Kadapa 133.3 km
Bandarawela 148.7 km
Badulla 153.6 km
Arogyavaram 158.2 km
Trincomalee 163.3 km
Hambantota 169.4 km
Sélam 186.2 km
Madurai 195.1 km
Batticaloa 215.4 km
Pottuvil 233.7 km
Palayamkottai 236.6 km
Bangalore / Hindustan 245.6 km
Bengalúr 254.4 km
Anantapur 259.9 km
Coimbatore/Peelamedu 309.8 km
Tiruvanantapuram Letiště 325.5 km
Óttakamandu 345.3 km
Maisúr 350.2 km
Alappuzha 381.6 km
Kóčin Letiště 382.4 km
Chitradurga 385.9 km
Willingdon 397.6 km
Kóžikkót 450.9 km
Madikeri 457.7 km