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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 - Nandivaram-Guduvancheri Vzdálenost
Letiště Čennaí 15.2 km
Nellúru 32.1 km
Cuddalore 37.8 km
Karaikal 44.4 km
Nákappattinam 45.9 km
Ongole 52.6 km
Jápané 61.4 km
Mannar 76.0 km
Vavuniya 91.6 km
Rentachintala 92.2 km
Anuradhápura Letiště 94.2 km
Puttalam 96.4 km
Maha Illuppallama 100.2 km
Vélúr 100.2 km
Vijayawada (Letiště) 107.7 km
Pamban 116.8 km
Mačilípatnam 136.8 km
Kadapa 139.5 km
Trincomalee 154.0 km
Tiruchirappalli Intl. Airport 154.3 km
Arogyavaram 173.2 km
Sélam 211.1 km
Madurai 226.8 km
Kurnool 229.4 km
Kakinada 252.9 km
Bangalore / Hindustan 265.7 km
Palayamkottai 270.5 km
Anantapur 273.8 km
Bengalúr 274.6 km
Raichur 311.3 km
Coimbatore/Peelamedu 336.3 km
Tiruvanantapuram Letiště 358.1 km
Ballari 359.9 km
Óttakamandu 370.6 km
Maisúr 373.1 km
Chitradurga 403.8 km
Kóčin Letiště 410.5 km
Alappuzha 411.1 km
Willingdon 426.1 km