There are several ways to determine what the weather for astronomy will be like over the next 24-48 hours. The first, and therefore most tedious way, is to check is using the service provided by Environment Canada. It is extremely useful because it lets you predict cloud cover, see (how steady the local atmosphere is), and transparency at your location in 3 hour increments. You can pick the specific time and region you want to view a map for. Be careful though because once there you need to translate the UTC time to Oberlin time (because we are special), that means subtract 5 hours for standard time and 4 hours for daylight savings time.
The later and therefore easier way of viewing the same information is by using the Clear Sky Clock. Attila Danko used Environment Canada's astromomy weather forecast data to produce said clock, and when I asked him to make one for us the clock below appeared.
Click on the clock image above to go to Oberlin's Clear Sky Clock page, where information for specific times pops up when you hover your mouse over a specific square. Double clicking on the blocks on the page also calls up the map showing the forecast for cloudiness, seeing, or transparency for that day and time. We are very thankful to Danko and to Allan Rahill of CMC for providing this clock and the many maps we use.
