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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 - Hayward Distance
Hayward Executive (Aéroport) 9.7 km
Moffett Federal Airfield 12.0 km
Palo Alto Aéroport 12.8 km
San José (Aéroport) 19.4 km
Aéroport international d'Oakland 21.5 km
Buchanan Field (Aéroport) 21.7 km
Livermore Municipal (Aéroport) 24.6 km
San Carlos (Aéroport) 24.8 km
Reid- Hillview (Aéroport) 29.3 km
San Francisco (Aéroport) 39.0 km
Travis Air Force Base 39.9 km
Napa Aéroport 44.8 km
Nut Tree (Aéroport) 45.2 km
Watsonville Municipal (Aéroport) 48.9 km
Eddie Andreini Sr. Airfield 52.3 km
South County Arpt Of Santa Clara County 57.8 km
Davis Aéroport 60.4 km
Aéroport régional de Monterey 64.2 km
Marin 66.1 km
Salinas Municipal (Aéroport) 73.7 km
Petaluma Aéroport 74.2 km
Sacramento Executive (Aéroport) 79.5 km
Sacramento (Aéroport) 80.2 km
Hollister Aéroport 81.3 km
Stockton Metropolitan (Aéroport) 88.8 km
Sacramento McClellan (Aéroport) 93.5 km
Sacramento Mather (Aéroport) 98.2 km
Yuba 101.3 km
Santa Rose Airport 102.4 km
Lincoln Aéroport 107.1 km
Beale Air Force Base 111.1 km
Oroville Municipal (Aéroport) 119.0 km
Modesto 120.6 km
Chico Municipal (Aéroport) 129.2 km
Auburn Aéroport 131.1 km
Nevada 148.0 km
Red Bluff Municipal (Aéroport) 151.9 km
Placerville (Aéroport) 156.3 km
Ukiah Aéroport 158.4 km
Castle (Aéroport) 163.7 km
Merced (Aéroport) 169.9 km
Redding Municipal (Aéroport) 173.4 km
Blue Canyon 175.5 km
Columbia Aéroport 181.8 km
Paso Robles Municipal (Aéroport) 192.4 km
San Luis Obispo County Regional (Aéroport) 207.3 km
Weaverville 211.6 km
Trinity Center 213.7 km
Madera Municipal (Aéroport) 216.6 km
Mont Shasta 221.5 km
Vandenberg Space Force Base 232.8 km
Truckee Tahoe (Aéroport) 233.0 km
Santa Maria Public (Aéroport) 235.9 km
Lake Tahoe (Aéroport) 238.4 km
Naval Air Station Lemoore 243.3 km
Lompoc Aéroport 243.7 km
Siskiyou 252.0 km
Fresno Yosemite (Aéroport) 262.4 km
Aéroport Reno Stead 267.3 km
Carson City Aéroport 271.5 km
Reno-Tahoe (Aéroport) 272.6 km
Santa Ynez Aéroport 278.1 km
Hanford Municipal (Aéroport) 279.0 km
Alturas Aéroport 279.7 km
Rohnerville (Aéroport) 294.0 km
Visalia Municipal (Aéroport) 302.3 km
Santa Barbara Municipal (Aéroport) 305.1 km
Aéroport d'Arcata-Eureka 306.3 km
Porterville Aéroport 342.6 km
Crescent City 352.4 km
Meadows Field (Aéroport) 354.3 km
Mammoth Yosemite (Aéroport) 355.6 km
Oxnard (Aéroport) 370.0 km
Camarillo Aéroport 379.9 km
Naval Air Station Point Mugu 380.3 km
Naval Outlying Landing Field San Nicolas 380.5 km
Hawthorne Industrial (Aéroport) 382.0 km
Naval Air Station Fallon Aéroport 384.5 km
Sandberg (Aéroport) 401.2 km
Eastern Sierra Regional (Aéroport) 408.4 km
Derby Field 409.6 km
Tehachapi Municipal (Aéroport) 423.5 km
Van Nuys Aéroport 438.7 km
Whiteman (Aéroport) 444.1 km
Santa Monica (Aéroport) 446.9 km
Burbank 452.3 km
General William J. Fox Airfield 453.9 km
Los Angeles (Aéroport) 455.1 km
Aéroport et port spatial de Mojave Aéroport 455.1 km
Hawthorne Municipal (Aéroport) 460.5 km
Île San Clemente Aéroport 462.0 km
Zamperini Field 464.2 km
Downtown Los Angeles 467.5 km
Catalina (Aéroport) 468.2 km
Long Beach (Aéroport) 481.3 km
San Gabriel Valley (Aéroport) 486.7 km
Joint Forces Training Base 491.6 km