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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.


Stations météo à proximité - Karuizawa Distance
Nagano 47.8 km
Suwa 53.7 km
Kōfu 55.6 km
Maebashi 57.8 km
Matsumoto 65.3 km
Chichibu 66.2 km
Matsumoto (Aéroport) 71.2 km
Takada 72.0 km
Kawaguchiko 73.7 km
Fuji Mountain 83.7 km
Fuji 92.1 km
Kumagaya 94.0 km
Yokota Air Base 101.6 km
Iida 104.7 km
Tachikawa Airfield 108.4 km
Mishima 110.4 km
Nikkō 111.0 km
Shizuoka 115.1 km
Zama Aéroport 116.4 km
Zama Aéroport 116.4 km
Chōfu (Aéroport) 122.3 km
Ajiro 123.7 km
Shizuhama Air Base 129.7 km
Shimada Aéroport 134.1 km
Niigata 143.8 km
Yokohama 144.0 km
Aikawa 145.3 km
Takayama 145.5 km
Tokyo 146.1 km
Utsunomiya 147.7 km
Irozaki 148.8 km
Omaezaki 148.9 km
Niigata Aéroport 149.6 km
Tokyo-Haneda (Aéroport) 152.3 km
Toyama 153.3 km
Toyama Aéroport 153.9 km
Tokyo Heliport 155.0 km
Aérodrome d'Izu Ōshima 158.4 km
Oshima 161.0 km
Hamamatsu 164.1 km
Shimofusa (Aéroport) 168.9 km
Fushiki 170.6 km
Wakamatsu 180.4 km
Tateyama 182.3 km
Chiba 183.3 km
Tateyama 185.5 km
Noto (Aéroport) 193.7 km
Shirakawa 197.5 km
Nagoya 200.8 km
Gifu Air Field 202.4 km
Wajima 203.0 km
Aéroport d'Ibaraki 208.0 km
Nouvel aéroport international de Tokio 209.6 km
Gifu 212.9 km
Mito 213.4 km
Kanazawa 214.4 km
Irako 214.6 km
Miyakejima Island 215.0 km
Katsuura 220.7 km
Aéroport international du Chūbu 229.0 km
Komatsu Aéroport 238.6 km
Fukushima 244.8 km
Yokkaichi 247.3 km
Shōnai 250.1 km
Akeno Air Field 256.1 km
Yamagata 257.7 km
Fukui 258.9 km
Sakata 260.2 km
Tsu 261.7 km
Chōshi 262.9 km
Onahama 266.8 km
Yamagata Aéroport 268.3 km
Hikone 270.5 km
Tsuruga 282.0 km
Shinjō 283.6 km
Ueno 296.4 km
Hachijō-jima 303.7 km
Sendai (Aéroport) 306.2 km
Sendai 308.8 km
Owase 320.8 km
Nara 331.1 km
Kyoto 331.4 km
Akita 333.7 km
Akita Aéroport 333.8 km
Ishinomaki 354.5 km
Yao Aéroport 357.5 km
Osaka 363.4 km
Maizuru 367.0 km
Aéroport international d'Osaka 367.4 km
Odate- Noshiro (Aéroport) 384.2 km
Shionomisaki Lighthouse 389.0 km
Hanamaki (Aéroport) 390.0 km
Kobe 394.1 km
Fukaura 395.2 km
Kobe Aéroport 395.2 km
Aéroport international du Kansai 399.0 km
Morioka 408.4 km
Wakayama 413.4 km
Nanki 415.8 km