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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.


Nächste Wetterstation - Atherton Abstand
Palo Alto Flughafen 7.5 km
San Carlos Airport 8.4 km
Hayward Executive Airport 14.8 km
Moffett Federal Airfield 15.0 km
Metropolitan Oakland Flughafen 17.2 km
San Francisco Intl. Airport 24.4 km
San José Flughafen 29.3 km
Buchanan Field Airport 34.9 km
Half Moon Bay Airport 35.4 km
Reid- Hillview Airport 41.4 km
Livermore Municipal Airport 43.4 km
Napa Flughafen 46.6 km
Watsonville Flughafen 54.0 km
Travis Air Force Base 55.7 km
Marin 58.6 km
Nut Tree Airport 60.1 km
Monterey Regional Airport 63.2 km
Petaluma Flughafen 67.3 km
South County Arpt Of Santa Clara County 68.8 km
Davis Flughafen 77.6 km
Salinas Municipal Airport 79.6 km
Hollister Flughafen 92.0 km
Santa Rose Airport 95.1 km
Sacramento Flughafen 98.6 km
Sacramento Executive Airport 98.6 km
Stockton Metropolitan Airport 107.2 km
Sacramento McClellan Airport 112.7 km
Sacramento Mather Flughafen 117.6 km
Yuba 118.8 km
Lincoln Flughafen 126.1 km
Beale Air Force Base 129.3 km
Oroville Municipal Airport 135.2 km
Modesto 137.7 km
Chico Municipal Airport 142.6 km
Auburn Flughafen 150.4 km
Ukiah Flughafen 151.6 km
Red Bluff Municipal Airport 160.4 km
Nevada 167.2 km
Placerville Airport 175.6 km
Castle Air Force Base 179.9 km
Redding Municipal Airport 181.6 km
Merced Regional Airport 185.8 km
Blue Canyon 194.9 km
Columbia Flughafen 199.8 km
Paso Robles Municipal Airport 201.2 km
Weaverville 213.9 km
San Luis Obispo County Regional Airport 214.3 km
Trinity Center 218.5 km
Mount Shasta 230.0 km
Madera Municipal Airport 231.7 km
Vandenberg Space Force Base 238.4 km
Santa Maria Public Airport 242.9 km
Lompoc Flughafen 249.9 km
Truckee Tahoe Airport 252.2 km
Naval Air Station Lemoore 256.7 km
Lake Tahoe Airport 257.3 km
Siskiyou 259.7 km
Fresno Yosemite Intl. Airport 277.4 km
Santa Ynez Flughafen 286.0 km
Reno Stead Airport 286.6 km
Rohnerville Airport 287.7 km
Carson City Flughafen 290.5 km
Reno-Tahoe Flughafen 291.8 km
Hanford Municipal Airport 293.0 km
Alturas Flughafen 297.9 km
Arcata-Eureka Airport 300.6 km
Santa Barbara Municipal Airport 313.6 km
Visalia Municipal Airport 316.5 km
Crescent City 349.0 km
Porterville Flughafen 356.6 km
Meadows Field Airport 367.0 km
Mammoth Yosemite Airport 372.4 km
Oxnard Airport 379.9 km
Naval Outlying Landing Field San Nicolas 387.7 km
Camarillo Flughafen 390.0 km
Naval Air Station Point Mugu 390.2 km
Hawthorne Industrial Airport 399.9 km
Naval Air Station Fallon Airport 403.2 km
Sandberg Airport 413.1 km
Eastern Sierra Regional Airport 424.9 km
Derby Field 428.6 km
Tehachapi Municipal Airport 436.6 km
Van Nuys Flughafen 450.1 km
Whiteman Airport 455.7 km
Santa Monica Municipal Airport 458.0 km
Burbank 463.9 km
Los Angeles Intl. Airport 466.2 km
General William J. Fox Airfield 466.6 km
Mojave Air & Space Port Flughafen 468.4 km
San Clemente Island Flughafen 471.2 km
Hawthorne Municipal Airport 471.7 km
Zamperini Field 475.2 km
Catalina Airport 478.4 km
Downtown Los Angeles 479.0 km
Long Beach Airport 492.7 km
San Gabriel Valley Airport 498.6 km
Joint Forces Training Base 503.1 km

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