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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.


Nearby Weather Stations - Cheyyar Απόσταση
Cuddalore 30.1 km
Vellore 44.8 km
Karaikal 47.0 km
Nagapattinam 50.4 km
Nellore 59.8 km
Chennai International Airport 70.8 km
Pamban 78.7 km
Rentachintala 78.7 km
Τζάφνα 79.0 km
Ongole 79.8 km
Mannar 83.7 km
Kadapa 88.3 km
Puttalam 97.5 km
Tiruchirappalli International Airport 101.0 km
Arogyavaram 118.3 km
Ανουρανταπούρα Αεροδρόμιο 127.8 km
Βαβουνίγια 129.9 km
Maha Illuppallama 134.6 km
Salem 155.5 km
Vijayawada Airport 156.9 km
Μαντουράι 173.2 km
Kurnool 178.4 km
Machilipatnam 189.8 km
Trincomalee 203.7 km
Bangalore / Hindustan 210.1 km
Palayamkottai 218.0 km
Μπανγκαλόρ 219.0 km
Ανάνταπουρ 219.7 km
Raichur 259.3 km
Coimbatore/Peelamedu 280.7 km
Τιρουβανανταπουράμ Αεροδρόμιο 304.4 km
Ballari 305.8 km
Kakinada 307.9 km
Ooty 314.9 km
Μαϊσόρ 317.4 km
Chitradurga 348.8 km
Κοτσί Αεροδρόμιο 355.2 km
Alappuzha 356.1 km
Willingdon 370.8 km
Kozhikode 420.6 km
Madikeri 424.9 km
Bijapur 437.8 km
Gadag-Betageri 440.8 km