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América do Norte



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 - Grass Valley Distância
Nevada 6.3 km
Auburn Aeroporto 12.1 km
Blue Canyon 34.7 km
Placerville Airport 36.9 km
Lincoln Aeroporto 39.1 km
Sacramento Mather Airport 45.4 km
Beale Air Force Base 46.4 km
Sacramento McClellan Airport 50.0 km
Yuba 61.2 km
Sacramento Executive Airport 63.8 km
Aeroporto Internacional de Sacramento 68.4 km
Oroville Municipal Airport 70.7 km
Stockton Metropolitan Airport 74.7 km
Modesto 85.3 km
Columbia Aeroporto 91.1 km
Davis Aeroporto 92.2 km
Truckee Tahoe Airport 99.0 km
Chico Municipal Airport 100.5 km
Castle Airport 110.8 km
Nut Tree Airport 112.7 km
Travis Air Force Base 113.4 km
Lake Tahoe Airport 114.3 km
Merced Regional Airport 118.3 km
Livermore Municipal Airport 121.2 km
Reno Stead Airport 130.7 km
Buchanan Field Airport 132.6 km
South County Arpt Of Santa Clara County 134.3 km
Hollister Aeroporto 135.5 km
Reid- Hillview Airport 136.5 km
Reno 139.0 km
Carson City Aeroporto 143.0 km
San Jose Intl. Airport 143.7 km
Alturas Aeroporto 146.0 km
Hayward Executive Airport 148.8 km
Red Bluff Municipal Airport 150.0 km
Napa Aeroporto 150.3 km
Moffett Federal Airfield 151.7 km
Watsonville Municipal Airport 152.7 km
Palo Alto Aeroporto 155.7 km
Salinas Municipal Airport 155.9 km
Aeroporto Internacional de Oakland 156.1 km
Madera Municipal Airport 157.6 km
Redding Municipal Airport 164.1 km
San Carlos Airport 166.1 km
Monterey Regional Airport 173.9 km
Aeroporto Internacional de São Francisco 175.6 km
Marin 180.6 km
Petaluma Aeroporto 183.9 km
Lake County Airport 186.5 km
Eddie Andreini Sr. Airfield 189.9 km
Crater Lake 192.2 km
Monte Shasta 193.5 km
Fresno Yosemite Intl. Airport 196.0 km
Naval Air Station Lemoore 197.0 km
Paso Robles Municipal Airport 201.3 km
Santa Rose Airport 203.5 km
Trinity Center 216.5 km
Hanford Municipal Airport 221.4 km
Siskiyou 224.6 km
San Luis Obispo County Regional Airport 225.2 km
Weaverville 232.8 km
Visalia Municipal Airport 238.7 km
Ukiah Aeroporto 243.1 km
Mammoth Yosemite Airport 256.2 km
Naval Air Station Fallon Airport 258.3 km
Hawthorne Industrial Airport 267.1 km
Porterville Aeroporto 277.2 km
Derby Field 277.7 km
Medford Aeroporto 281.1 km
Meadows Field Airport 300.0 km
Eastern Sierra Regional Airport 310.3 km
Burns Municipal Airport 338.5 km
Roseburg Regional Airport 356.3 km
Rohnerville Airport 357.4 km
Tehachapi Municipal Airport 361.3 km
Arcata 364.9 km
Winnemucca Aeroporto 371.1 km
Porto Espacial e Aéreo de Mojave Aeroporto 389.1 km
Crescent City 392.1 km
Rome State Airport 398.5 km
Brookings Aeroporto 405.3 km
Estação Aeronaval de Armas de China Lake 415.5 km
Tonopah Airport 441.6 km
Southwest Oregon Regional Airport 442.7 km