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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 - Tiruttani Distância
Cuddalore 32.5 km
Nellore 48.0 km
Karaikal 50.8 km
Vellore 52.2 km
Negapatão 54.2 km
Aeroporto Internacional de Chennai 63.2 km
Ongole 67.5 km
Rentachintala 68.8 km
Jafanapatão 82.3 km
Pamban 91.0 km
Kadapa 91.4 km
Tiruchirappalli Intl. Airport 112.0 km
Arogyavaram 124.5 km
Vijayawada Airport 146.0 km
Haiderabade Aeroporto 156.8 km
Aeroporto Internacional Rajiv Gandhi 157.8 km
Kothagudem 164.5 km
Salem 164.6 km
Masulipatão 179.7 km
Kurnool 181.6 km
Madurai 184.0 km
Bangalore / Hindustan 217.5 km
Anantapur 225.1 km
Bangalor 226.4 km
Bidar Airport 254.3 km
Raichur 263.2 km
Coimbatore/Peelamedu 289.7 km
Kakinada 298.6 km
Ballari 311.2 km
Kalaburagi 322.1 km
Udhagamandalam 323.5 km
Maiçor 325.3 km
Chitradurga 355.2 km
Cochim Aeroporto 364.5 km
Alappuzha 365.7 km
Willingdon 380.2 km
Vishakhapatnam/Waltair 416.5 km
Sholapur Aeroporto 426.8 km
Calecute 429.1 km
Madikeri 432.6 km
Bijapur 442.5 km
Gadag-Betigeri 446.6 km