World

India



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 - Perambalur Distance
Tiruchirappalli Intl. Airport 19.3 km
Vellore 47.9 km
Pamban 56.5 km
Arogyavaram 65.0 km
Kadapa 70.4 km
Salem 78.5 km
Madurai 91.4 km
Cuddalore 100.8 km
Karaikal 107.8 km
Nagapattinam 109.9 km
Mannar 125.5 km
Puttalam 125.9 km
Jaffna 131.9 km
Kurnool 135.3 km
Palayamkottai 136.3 km
Bangalore / Hindustan 139.6 km
Katunayake 140.4 km
Nellore 140.7 km
Bangalore 148.3 km
Chennai Intl. Airport 150.9 km
Ongole 158.7 km
Anantapur 159.8 km
Anuradhapura Airport 181.9 km
Kurunegala 183.1 km
Vavuniya 188.3 km
Maha Illuppallama 188.5 km
Coimbatore/Peelamedu 202.3 km
Kandy 211.1 km
Thiruvananthapuram Airport 222.6 km
Ooty 237.5 km
Ballari 242.5 km
Mysore 242.5 km
Trincomalee 270.0 km
Kochi Airport 275.5 km
Alappuzha 275.6 km
Chitradurga 280.1 km
Willingdon 291.0 km
Batticaloa 322.0 km
Kozhikode 343.2 km
Madikeri 350.0 km
Gadag-Betageri 374.2 km
Mangalore/Bajpe 445.5 km
Belgaum/Sambra 487.3 km
Honnavar 497.8 km
Karwar 534.8 km