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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 - Graham Distância
Puyallup Aeroporto 4.2 km
McChord Air Force Base 23.3 km
Aeroporto Internacional de Seattle-Tacoma 24.8 km
Aeroporto Municipal de Renton 28.7 km
Boeing Field Airport 29.8 km
Gray Army Airfield 33.5 km
Tacoma Narrows Airport 36.2 km
Paine Field 51.9 km
Bremerton Ntnl Arpt 59.0 km
Arlington Aeroporto 68.3 km
Olympia Regional Airport 68.8 km
Chehalis Aeroporto 80.7 km
Skagit Regional Airport 87.0 km
Southwest Washington Regional Airport 87.9 km
Portland- Troutdale Airport 89.3 km
Naval Air Station Whidbey 89.5 km
Portland Aeroporto 92.6 km
Pearson Field 94.0 km
Sanderson Field Airport 97.2 km
Scappoose Industrial Airpark Airport 98.7 km
Stampede 106.8 km
Bellingham Intl. Airport 109.0 km
Hillsboro Airport 116.7 km
Abbotsford Aeroporto 119.4 km
Aurora State Airport 119.8 km
Friday Harbor Aeroporto 120.8 km
Orcas Island Airport 122.2 km
White Rock Campbell Scientific 130.3 km
Saturna Island 135.4 km
Pitt Meadows Campbell Scientific 137.0 km
Saturna/capmon Cs 140.8 km
Victoria Uni. Campbell Scientific 141.8 km
Coast Guard Air Station Port Angeles 142.6 km
Victoria Gonzales 142.7 km
Agassiz 142.9 km
McMinnville Municipal Airport 145.3 km
Burns Bog 149.4 km
Columbia Gorge Regional Airport 149.4 km
McNary Field Airport 150.2 km
William R. Fairchild Intl. Airport 150.4 km
Victoria Int. Airport 161.0 km
Hope Aerodrome 162.2 km
Vancouver Aeroporto 162.5 km
Hope 163.1 km
Vancouver Hrbour 165.0 km
Malahat 167.1 km
Sands Head 168.3 km
West Vancouver 171.7 km
Bowerman Airport 183.7 km
Astoria Regional Airport 186.0 km
Corvallis Municipal Airport 188.9 km
Squamish Airport 192.5 km
North Cowichan 193.2 km
Bowers Airport 194.8 km
Tillamook Airport 196.5 km
Yakima Aeroporto 196.7 km
Sheringham 199.5 km
Blackcombe Mtn Base 200.2 km
Whistler Aeroporto 200.2 km
Pemberton Airport 201.7 km
Lytton 203.4 km
Lytton 203.4 km
Eugene Airport 204.0 km
Roberts Field 204.9 km
Callaghan Valley 208.4 km
Bend Municipal Airport 210.1 km
Entrance Isl. 215.0 km
Nanaimo Airport 215.4 km
Lillooet 219.4 km
Prineville Aeroporto 221.9 km
Pangborn Memorial Airport 232.9 km
Ashcroft 242.6 km
Princeton 243.5 km
Merritt 245.3 km
Newport Municipal Airport 246.8 km
Ballenas Island 251.2 km
Clinton 256.8 km
Roseburg Regional Airport 258.1 km
Clinton/Bleibler Ranch Aerodrome 258.3 km
Quillayute Airport 258.5 km
Sunnyside Muni 260.7 km
Qualicum Airport 273.9 km
Sisters Island 282.4 km
Kamloops Airport 294.5 km
Kamloops 294.7 km
Powell River 298.9 km
Ephrata Municipal Airport 308.4 km
Southwest Oregon Regional Airport 310.9 km
Omak Airport 316.2 km
Summerland 327.0 km
Port Alberni 327.1 km
Penticton Aeroporto 329.5 km
Grant County Intl. Airport 330.4 km
Comox 334.8 km
Osoyoos 337.1 km
Hermiston Municipal Airport 342.7 km
Tri-Cities Airport 355.2 km
Clearwater 361.7 km
Aeroporto Internacional de Kelowna 363.5 km
Tatlayoko Lake RCS 368.5 km