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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.


Estações Meteorológicas Próximas - Ichikawa Distância
Tokyo Heliport 11.1 km
Shimofusa Airport 12.7 km
Tóquio 16.9 km
Aeroporto Internacional de Tóquio 20.5 km
Chiba 22.7 km
Yokohama 38.2 km
Chōfu Airport 43.4 km
Tokio New Intl. Airport 52.1 km
Aeródromo de Tachikawa 57.2 km
Zama Aeroporto 60.7 km
Zama Aeroporto 60.7 km
Tateyama 62.7 km
Tateyama 62.8 km
Base aérea de Yokota 63.1 km
Katsuura 65.8 km
Ibaraki Airport 68.2 km
Kumagaya 69.8 km
Utsunomiya 71.2 km
Mito 83.7 km
Chichibu 95.5 km
Nikkō 98.0 km
Oshima Airport 100.6 km
Oshima 102.3 km
Choshi 105.8 km
Ajiro 107.0 km
Maebashi 110.9 km
Mishima 120.6 km
Fuji 121.7 km
Shirakawa 125.5 km
Kawaguchiko 129.3 km
Fuji Mountain 135.8 km
Miyakejima Island 142.3 km
Wakamatsu 150.5 km
Irozaki 151.7 km
Kōfu 152.2 km
Onahama 152.2 km
Karuizawa 160.8 km
Shizuoka 180.3 km
Fukushima 184.3 km
Shizuhama Air Base 195.6 km
Suwa 202.3 km
Nagano 207.1 km
Shimada Aeroporto 207.3 km
Niigata 209.7 km
Niigata Aeroporto 209.7 km
Omaezaki 211.3 km
Takada 219.0 km
Matsumoto 221.6 km
Hachijo-jima 221.7 km
Yamagata 221.8 km
Matsumoto Airport 225.1 km
Iida 232.5 km
Yamagata Aeroporto 235.8 km
Aeroporto de Sendai 236.2 km
Sendai 244.6 km
Hamamatsu 259.3 km
Shinjo 262.9 km
Shōnai 263.8 km
Aikawa 269.6 km
Sakata 271.1 km
Ishinomaki 279.9 km
Takayama 299.0 km
Toyama 313.3 km
Toyama Aeroporto 313.6 km
Irako 327.1 km
Fushiki 330.8 km
Nagoia 331.6 km
Akita Aeroporto 334.5 km
Gifu Air Field 340.3 km
Akita 341.7 km
Hanamaki Airport 346.6 km
Gifu 351.6 km
Ofunato 351.7 km
Aeroporto Internacional de Chūbu Centrair 353.6 km
Noto Airport 354.1 km
Wajima 363.3 km
Morioka 369.4 km
Kanazawa 372.5 km
Akeno Air Field 374.3 km
Yokkaichi 376.7 km
Tsu 387.2 km
Komatsu Aeroporto 394.6 km
Miyako 409.4 km
Hikone 409.9 km
Fukui 411.0 km
Ueno 426.6 km
Tsuruga 428.6 km
Owase 435.7 km
Nara 462.5 km
Quioto 469.2 km
Yao Aeroporto 489.2 km
Osaka 497.1 km
Shionomisaki Lighthouse 498.3 km
Aeroporto Internacional de Osaka 503.1 km
Maizuru 512.5 km
Kobe 529.8 km
Kobe Aeroporto 529.9 km
Kansai Intl. Airport 530.3 km
Nanki 534.1 km
Wakayama 542.6 km