Transparency Forecast Graph
Check out the fun transparency forcast graph at the top of this page. It's a doohickey put together by the very helpful Atilla Danko using some great data and images from the Canadian Meteorological Centre.
How's it work? Well, there are more details elsewhere, but the short of it is you look at the top row of boxes for an hour-by-hour view of cloud cover and the bottom row for overall transparency. The one on this page is keyed to the NE Philly Airport. That's not quite where I'm observing from, but it's close enough, I suppose. Note that it does not take into account transparency issues due to light pollution, and the like; it's only a quick snapshot forecast of moisture levels. The red lines mark off days (divisions between midnight and 1a), and the forecasts generally look forward only a day or two.
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How's it work? Well, there are more details elsewhere, but the short of it is you look at the top row of boxes for an hour-by-hour view of cloud cover and the bottom row for overall transparency. The one on this page is keyed to the NE Philly Airport. That's not quite where I'm observing from, but it's close enough, I suppose. Note that it does not take into account transparency issues due to light pollution, and the like; it's only a quick snapshot forecast of moisture levels. The red lines mark off days (divisions between midnight and 1a), and the forecasts generally look forward only a day or two.
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