World

Asia



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 - Ambattur Distance
Chennai Intl. Airport 4.2 km
Nellore 31.9 km
Ongole 48.5 km
Cuddalore 49.9 km
Karaikal 55.0 km
Nagapattinam 56.1 km
Jaffna 67.8 km
Rentachintala 95.3 km
Vijayawada Airport 95.8 km
Vellore 111.4 km
Kothagudem 116.9 km
Machilipatnam 124.6 km
Pamban 128.7 km
Kadapa 149.2 km
Tiruchirappalli Intl. Airport 166.5 km
Arogyavaram 183.9 km
Hyderabad Airport 207.7 km
Rajiv Gandhi Intl. Airport 209.8 km
Salem 222.8 km
Kurnool 238.7 km
Madurai 238.9 km
Kakinada 240.9 km
Bangalore / Hindustan 276.9 km
Anantapur 284.0 km
Bangalore 285.7 km
Bidar Airport 309.0 km
Raichur 320.8 km
Coimbatore/Peelamedu 348.0 km
Vishakhapatnam/Waltair 358.0 km
Ballari 370.1 km
Kalaburagi 379.0 km
Ooty 382.2 km
Mysore 384.5 km
Chitradurga 414.5 km
Kochi Airport 422.4 km
Alappuzha 423.1 km
Willingdon 438.0 km