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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 - Cheonan Distance
Cheonan 0.0 km
Pyeongtaek 16.3 km
Osan Airport 24.2 km
Suwon 36.7 km
Cheongju 38.2 km
Cheongju Airport 42.9 km
Daejeon 44.5 km
Seoul Air Base 45.6 km
Icheon 52.9 km
Seoul 56.2 km
Gimpo Intl. Airport 63.2 km
Jeonju 63.9 km
Gunsan 64.4 km
Boryeong 69.4 km
Incheon 72.0 km
Seosan 72.4 km
Dongducheon 76.3 km
Kunsan AP 79.5 km
Munsan 84.3 km
Jeongeup 86.1 km
Incheon IAP 87.7 km
Namwon 95.1 km
Cheorwon 95.3 km
Wonju 100.4 km
Kaesong 100.8 km
Gochang 101.0 km
Chuncheon 102.9 km
Chupungnyeong 105.2 km
Gwangju 110.3 km
Pyonggang 111.8 km
Chinhae 114.7 km
Suncheon 115.1 km
Sangju 117.7 km
Singye 132.6 km
Gumi 140.7 km
Muan Airport 143.7 km
Yeongwol 152.9 km
Yeosu 153.7 km
Yeosu 153.7 km
Jinju 154.0 km
Mokpo 155.3 km
Yangdok 163.8 km
Wando 164.9 km
Wonsan 166.7 km
Jindo Radar 176.2 km
Daegu 177.6 km
Haeju 178.5 km
Andong 178.6 km
Changjon 178.8 km
Taegu US-AFB 180.7 km
Sariwon 189.7 km
Sokcho 190.6 km
Daegwallyeong 194.1 km
Yangyang Airport 194.2 km
Masan 194.3 km
Tongyeong 196.4 km
Chuncheon 205.5 km
Gangneung 209.6 km
Pyongyang 210.9 km
Hamhung 219.1 km
Jeju 226.3 km
Jeju Intl. Airport 226.9 km
Seongsan 227.9 km
Gimhae Airport 229.5 km
Donghae Radar 230.1 km
Heuksando 230.8 km
Nampo 233.3 km
Busan 242.1 km
Seogwipo 242.6 km
Changjin 242.6 km
Huichon 245.8 km
Anju 249.1 km
Sinpo 251.8 km
Gosan 254.4 km
Uljin 256.5 km
Pohang 257.3 km
Ulsan 258.8 km
Ryongyon 265.7 km
Kanggye 286.2 km
Baengnyeongdo 287.3 km
Kusong 296.4 km
Pungsan 298.3 km
Tsushima Airport 299.9 km
Tsushima 300.5 km
Fukue 337.7 km
Fukue Airport 339.6 km
Supung 342.3 km
Kimchaek 354.5 km
Hirado 359.1 km
Kuandian 366.1 km
Sinuiju 373.5 km
Dandong 377.4 km
Sasebo 383.9 km
Nagasaki Airport 410.0 km
Nagasaki 414.4 km
Ulleungdo 424.1 km
Fukuoka Airport 425.9 km
Saga 429.9 km
Saga Airport 435.3 km
Unzendake Mount 448.4 km

Current weather