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Photographing night and day sky means continuous monitoring of local weather and space weather. There is a number of meteorological sites: Finnish Meteorological Institute (FMI) gives a comprehensive look at weather and updates forecast several times a day. They also have some nice satellite images of clouds, although their update rate is not always good. Foreca also gives detailed forecasts, but unfortunately they do update their forecast only in the morning and in the evening. For detailed current weather data in Turku check Åbo Akademi's weather station.
A very nice amateur weather station maintains also quality weather satellite images. A most wonderful site with a multitude of forecasts is given by Polish Numerical Weather forecast ICM. In this site you choose your location on map and get a 3 days' graphical forecast with a lot of data. Data is updated every six hours and becomes available at about 4UT, 10UT, 16UT and 22UT. The same institute produces another great set of graphical weather data. Again, data is updated every 6 hours and becomes available as given above. For Europeans interested in coming weather this is a must! Like Polish meteograms above nice data is provided also by University of Basel; clic meteograms and pick your site. Note that there is also a lot of other data and a link to an experimental astronomical seeing prediction! A low resolution satellite image (updated hourly) is given by Austrian ZAMG.
You can check current and coming weather in North-America or in Canada. Sure enough, there must be even better places for North-Americans, but from European vantage point these are much of what is needed.
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