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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.


Estaciones meteorológicas cercanas - Katsuura Distancia
Katsuura 0.0 km
Chiba 45.4 km
Tateyama 52.1 km
Tokio New aeropuerto 53.4 km
Tateyama 55.7 km
Shimofusa aeropuerto 65.0 km
Tokyo Heliport 67.5 km
Haneda aeropuerto 68.5 km
Tokio 76.3 km
Yokohama 78.0 km
Chōshi 79.2 km
Ibaraki aeropuerto 89.1 km
Chōfu aeropuerto 98.4 km
Mito 107.1 km
Zama Aeropuerto 107.3 km
Zama Aeropuerto 107.3 km
Oshima aeropuerto 111.0 km
Oshima 111.1 km
Tachikawa Airfield 112.3 km
Base Aérea de Yokota 119.1 km
Miyakejima Island 124.4 km
Utsunomiya 129.6 km
Kumagaya 134.3 km
Ajiro 135.7 km
Mishima 154.0 km
Chichibu 154.4 km
Fuji 162.0 km
Nikkō 162.6 km
Onahama 167.9 km
Irozaki 169.8 km
Shirakawa 170.1 km
Maebashi 175.0 km
Kawaguchiko 175.1 km
Fuji Mountain 177.9 km
Hachijōjima 183.4 km
Kōfu 201.5 km
Wakamatsu 204.2 km
Shizuoka 213.9 km
Karuizawa 220.7 km
Fukushima 223.6 km
Shizuhama Air Base 226.5 km
Omaezaki 238.3 km
Shimada Aeropuerto 238.7 km
Suwa 256.4 km
Yamagata 265.7 km
Sendai aeropuerto 265.7 km
Nagano 268.1 km
Niigata Aeropuerto 273.4 km
Niigata 273.9 km
Sendai 275.9 km
Matsumoto 277.5 km
Iida 278.2 km
Yamagata Aeropuerto 279.6 km
Matsumoto aeropuerto 279.9 km
Takada 282.8 km
Hamamatsu 291.9 km
Ishinomaki 303.7 km
Shinjō 308.4 km
Shōnai 318.0 km
Sakata 324.3 km
Aikawa 335.3 km
Takayama 351.5 km
Irako 361.5 km
Toyama Aeropuerto 370.2 km
Toyama 370.4 km
Nagoya 372.9 km
Ōfunato 373.0 km
Hanamaki aeropuerto 379.8 km
Akita Aeropuerto 382.4 km
Gifu Air Field 384.3 km
Fushiki 388.0 km
Akita 391.3 km
Chūbu Centrair aeropuerto 391.6 km
Gifu 395.7 km
Morioka 403.2 km
Akeno Air Field 408.9 km
Noto aeropuerto 414.1 km
Yokkaichi 416.0 km
Wajima 423.6 km
Tsu 424.4 km
Kanazawa 427.1 km
Miyako 431.1 km
Komatsu Aeropuerto 447.3 km
Hikone 452.8 km
Fukui 460.7 km
Ueno 464.9 km
Owase 467.0 km
Tsuruga 474.9 km