Observatory Forecast
Observatory Forecast
5.45 days until full moon
| 2025-12-29 |
7:00 |
0.3 |
| 2025-12-29 |
8:00 |
1 |
| 2025-12-29 |
9:00 |
0.3 |
| 2025-12-29 |
10:00 |
1.5 |
| 2025-12-29 |
11:00 |
7.4 |
| 2025-12-29 |
12:00 |
7.9 |
| 2025-12-29 |
1:00 |
7.9 |
| 2025-12-29 |
2:00 |
7.1 |
| 2025-12-29 |
3:00 |
1.8 |
| 2025-12-29 |
4:00 |
1.2 |
| 2025-12-29 |
5:00 |
1.2 |
| 2025-12-29 |
6:00 |
1.2 |
| 2025-12-29 |
Dusk |
1 |
| 2025-12-29 |
8:00 |
0.7 |
| 2025-12-29 |
9:00 |
0.7 |
| 2025-12-29 |
10:00 |
0.7 |
| 2025-12-29 |
11:00 |
0.7 |
| 2025-12-30 |
12:00 |
0.7 |
| 2025-12-30 |
1:00 |
0.7 |
| 2025-12-30 |
2:00 |
0.7 |
| 2025-12-30 |
3:00 |
1 |
| 2025-12-30 |
4:00 |
1 |
| 2025-12-30 |
5:00 |
1 |
| 2025-12-30 |
6:00 |
1 |
| 2025-12-30 |
7:00 |
1.2 |
| 2025-12-30 |
8:00 |
1.2 |
| 2025-12-30 |
9:00 |
1 |
| 2025-12-30 |
10:00 |
1 |
| 2025-12-30 |
11:00 |
1 |
| 2025-12-30 |
12:00 |
1 |
| 2025-12-30 |
1:00 |
1 |
| 2025-12-30 |
2:00 |
1 |
| 2025-12-30 |
3:00 |
1 |
| 2025-12-30 |
4:00 |
1 |
| 2025-12-30 |
5:00 |
1 |
| 2025-12-30 |
6:00 |
1 |
| 2025-12-30 |
Dusk |
1.2 |
| 2025-12-30 |
8:00 |
1 |
| 2025-12-30 |
9:00 |
1 |
| 2025-12-30 |
10:00 |
1 |
| 2025-12-30 |
11:00 |
1 |
| 2025-12-31 |
12:00 |
1 |
| 2025-12-31 |
1:00 |
0.7 |
| 2025-12-31 |
2:00 |
1 |
| 2025-12-31 |
3:00 |
1.5 |
| 2025-12-31 |
4:00 |
1.8 |
| 2025-12-31 |
5:00 |
1.8 |
| 2025-12-31 |
6:00 |
5.5 |
| 2025-12-31 |
7:00 |
5.5 |
| 2025-12-31 |
8:00 |
5.5 |
| 2025-12-31 |
9:00 |
4.3 |
| 2025-12-31 |
10:00 |
3.6 |
| 2025-12-31 |
11:00 |
1.7 |
| 2025-12-31 |
12:00 |
1 |
| 2025-12-31 |
1:00 |
1 |
| 2025-12-31 |
2:00 |
0.7 |
| 2025-12-31 |
3:00 |
0.5 |
| 2025-12-31 |
4:00 |
0.5 |
| 2025-12-31 |
5:00 |
0.5 |
| 2025-12-31 |
6:00 |
0.5 |
| 2025-12-31 |
Dusk |
0.7 |
Return to only lab hours
This scale is designed to rate the quality of the night sky based on some
major elements of the weather and Moon phase. If the forecasted value falls
between 0 and 4, the scale suggests that the weather conditions will be too
poor for the session to run. A scale value between 5 and 10 indicates weather
conditions that are favorable for observing, and the night lab session should
be run. When the scale is between 4 and 5, the quality of the sky for
astronomical observation may be difficult for the scale to predict accurately.
In this case, check the local sky, refer to other weather forecasts, and if
necessary, ask a professor or fellow TA for advice. In all cases, it is
recommended that you scan the sky for clouds in the small but possible event
that the Clear Sky Clock fails to predict them. If you have any questions or
comments, please send them to tyler.szwarc@bucknell.edu.
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Site written by Bryan Ward
Forecast Algorithm by Tyler Szwarc