Moose Pond
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Moose Pond clear sky chart from 2005-11-06 to 2024-11-25.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.

Observation Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(no limit)	Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

By Month

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

		Occurrence of each Forecast	Data Points
Cloud Cover	Day	17% 7% 2 6% 4 4 4 4 6% 7% 37%	101513
	Night	17% 8% 3 7% 4 4 4 4 6% 6% 37%	97964
Transparency	Day	45% 6% 12% 22% 14% 2	105038
	Night	45% 6% 12% 22% 13% 2	102528
Seeing	Day	22% 14% 29% 22% 10% 3	14968
	Night	21% 9% 30% 30% 9% 1	23802

By Month

Percentage Cloud Cover NE (2006-)
Color Meanings: Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	14% 9% 3 6% 4 4 5% 4 6% 7% 39%	2517
	11th to 20th	Day	15% 8% 3 7% 6% 5% 5% 4 5% 7% 36%	2520
	21st to end	Day	15% 12% 2 6% 4 4 4 4 5% 6% 37%	2772
February	1st to 10th	Day	14% 10% 4 6% 4 5% 5% 4 5% 6% 37%	1668
	11th to 20th	Day	11% 9% 3 8% 6% 4 4 4 7% 6% 38%	1848
	21st to end	Day	15% 10% 3 7% 4 5% 6% 4 5% 5% 36%	1570
March	1st to 10th	Day	23% 13% 3 7% 5% 4 4 3 4 4 29%	3116
	11th to 20th	Day	15% 8% 3 7% 5% 4 4 3 5% 7% 39%	3370
	21st to end	Day	22% 8% 3 6% 4 4 3 3 4 7% 35%	3991
April	1st to 10th	Day	19% 11% 3 6% 4 4 4 2 5% 6% 36%	2280
	11th to 20th	Day	18% 6% 3 6% 5% 5% 5% 4 6% 7% 38%	2319
	21st to end	Day	22% 8% 3 7% 4 4 4 3 4 5% 34%	2470
May	1st to 10th	Day	23% 9% 3 8% 4 5% 5% 4 5% 6% 27%	4106
	11th to 20th	Day	18% 8% 3 8% 6% 6% 5% 4 5% 7% 31%	4229
	21st to end	Day	15% 6% 2 6% 4 5% 5% 4 7% 9% 38%	4837
June	1st to 10th	Day	22% 7% 3 6% 5% 5% 4 5% 5% 7% 32%	2660
	11th to 20th	Day	16% 6% 3 5% 5% 4 4 4 6% 7% 39%	2660
	21st to end	Day	21% 7% 2 7% 5% 5% 5% 5% 5% 7% 31%	2660
July	1st to 10th	Day	14% 5% 2 6% 5% 5% 5% 5% 7% 10% 36%	4440
	11th to 20th	Day	11% 5% 2 6% 5% 4 5% 5% 8% 9% 40%	4440
	21st to end	Day	18% 6% 2 6% 4 4 5% 4 6% 7% 38%	4814
August	1st to 10th	Day	14% 6% 2 7% 6% 5% 6% 4 6% 8% 35%	4205
	11th to 20th	Day	18% 8% 2 7% 5% 5% 5% 4 5% 6% 34%	4045
	21st to end	Day	11% 4 2 5% 4 5% 5% 3 6% 9% 46%	4261
September	1st to 10th	Day	12% 4 2 5% 4 3 4 5% 6% 8% 48%	2265
	11th to 20th	Day	13% 4 2 5% 3 3 3 3 4 6% 53%	2090
	21st to end	Day	16% 5% 1 4 4 4 4 4 5% 7% 45%	2090
October	1st to 10th	Day	20% 7% 2 5% 4 4 4 3 5% 6% 40%	2090
	11th to 20th	Day	17% 7% 2 6% 3 3 3 3 4 7% 44%	1816
	21st to end	Day	24% 8% 3 6% 4 4 4 3 4 5% 36%	1881
November	1st to 10th	Day	15% 6% 2 6% 3 3 3 4 5% 7% 45%	1761
	11th to 20th	Day	19% 4 1 5% 3 3 5% 4 6% 6% 43%	1800
	21st to end	Day	21% 8% 2 5% 3 4 3 4 5% 6% 40%	1724
December	1st to 10th	Day	21% 10% 3 7% 5% 4 4 4 5% 7% 32%	1520
	11th to 20th	Day	21% 9% 2 6% 3 3 3 3 4 5% 39%	1906
	21st to end	Day	24% 12% 3 5% 4 5% 5% 4 6% 5% 30%	2772
January	1st to 10th	Night	16% 9% 3 6% 3 4 4 4 7% 7% 37%	4429
	11th to 20th	Night	12% 8% 3 10% 6% 6% 7% 5% 7% 7% 29%	4440
	21st to end	Night	18% 11% 3 9% 6% 5% 4 3 5% 6% 30%	4884
February	1st to 10th	Night	13% 10% 3 7% 5% 4 5% 5% 6% 6% 36%	2507
	11th to 20th	Night	10% 10% 3 6% 5% 5% 5% 4 6% 5% 41%	2218
	21st to end	Night	13% 10% 3 6% 5% 4 4 3 5% 6% 39%	1884
March	1st to 10th	Night	27% 10% 3 5% 4 4 3 3 4 5% 32%	3724
	11th to 20th	Night	13% 9% 4 9% 6% 6% 5% 4 5% 7% 32%	3589
	21st to end	Night	24% 9% 3 6% 4 4 4 3 5% 7% 32%	3639
April	1st to 10th	Night	19% 10% 3 7% 4 4 4 3 4 6% 37%	1900
	11th to 20th	Night	18% 8% 3 7% 5% 4 4 4 5% 7% 37%	1808
	21st to end	Night	23% 8% 2 5% 4 3 4 4 5% 5% 37%	1710
May	1st to 10th	Night	22% 10% 3 7% 5% 4 5% 4 6% 6% 27%	2834
	11th to 20th	Night	18% 9% 3 9% 5% 6% 5% 5% 6% 8% 27%	2691
	21st to end	Night	15% 6% 2 7% 4 4 4 3 6% 8% 41%	2738
June	1st to 10th	Night	22% 8% 2 5% 5% 4 5% 3 6% 6% 35%	1520
	11th to 20th	Night	18% 6% 2 4 4 5% 4 3 7% 8% 39%	1520
	21st to end	Night	20% 6% 2 6% 5% 4 4 4 6% 7% 36%	1520
July	1st to 10th	Night	12% 5% 2 5% 6% 4 5% 5% 9% 9% 37%	2520
	11th to 20th	Night	14% 5% 2 7% 5% 3 4 3 6% 8% 43%	2520
	21st to end	Night	15% 5% 2 5% 4 4 5% 3 7% 8% 41%	2739
August	1st to 10th	Night	21% 8% 2 7% 5% 4 4 4 5% 7% 33%	2693
	11th to 20th	Night	15% 7% 3 8% 4 5% 4 4 6% 7% 37%	2782
	21st to end	Night	10% 5% 2 7% 4 4 4 3 6% 8% 46%	3379
September	1st to 10th	Night	12% 5% 1 4 3 4 4 3 5% 7% 51%	1914
	11th to 20th	Night	15% 5% 2 4 3 3 3 3 4 5% 53%	2090
	21st to end	Night	15% 6% 2 5% 4 3 5% 3 5% 7% 46%	2090
October	1st to 10th	Night	19% 6% 2 7% 4 4 4 4 6% 6% 38%	2090
	11th to 20th	Night	17% 6% 2 5% 5% 4 4 4 6% 6% 41%	2358
	21st to end	Night	24% 8% 2 6% 3 4 4 4 5% 5% 36%	2717
November	1st to 10th	Night	15% 7% 2 6% 4 4 4 4 5% 6% 44%	2537
	11th to 20th	Night	17% 7% 2 5% 3 4 5% 3 5% 6% 42%	2600
	21st to end	Night	16% 9% 3 6% 3 4 4 3 4 6% 41%	2548
December	1st to 10th	Night	19% 10% 3 7% 4 4 4 4 6% 5% 33%	2660
	11th to 20th	Night	21% 8% 2 5% 4 4 3 4 5% 6% 37%	3288
	21st to end	Night	22% 10% 3 7% 4 4 4 3 4 5% 33%	4884

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	41% 7% 12% 27% 12% 1	2518
	11th to 20th	Day	44% 8% 13% 23% 10% 2	2520
	21st to end	Day	47% 6% 12% 23% 11% 1	2772
February	1st to 10th	Day	46% 6% 12% 20% 12% 3	1668
	11th to 20th	Day	45% 5% 12% 20% 14% 4	1857
	21st to end	Day	49% 6% 10% 18% 13% 4	1570
March	1st to 10th	Day	59% 5% 8% 11% 13% 3	3119
	11th to 20th	Day	42% 8% 12% 18% 14% 5%	3370
	21st to end	Day	49% 5% 7% 15% 19% 6%	3991
April	1st to 10th	Day	49% 5% 9% 19% 15% 4	2280
	11th to 20th	Day	43% 8% 11% 21% 14% 3	2319
	21st to end	Day	52% 5% 9% 16% 14% 4	2470
May	1st to 10th	Day	55% 9% 10% 16% 9% 1	4120
	11th to 20th	Day	50% 9% 13% 16% 9% 2	4233
	21st to end	Day	38% 9% 15% 21% 15% 1	4837
June	1st to 10th	Day	50% 7% 12% 21% 9% 1	2660
	11th to 20th	Day	42% 7% 13% 20% 16% 3	2660
	21st to end	Day	51% 9% 11% 17% 11% 1	2660
July	1st to 10th	Day	44% 5% 13% 25% 13%	4370
	11th to 20th	Day	39% 6% 17% 28% 11%	4365
	21st to end	Day	45% 5% 12% 22% 15% 1	4661
August	1st to 10th	Day	45% 6% 15% 24% 9%	4191
	11th to 20th	Day	49% 5% 14% 23% 7%	4084
	21st to end	Day	35% 5% 14% 26% 19% 2	4261
September	1st to 10th	Day	32% 8% 13% 28% 18% 1	2265
	11th to 20th	Day	32% 5% 10% 31% 20% 3	2090
	21st to end	Day	38% 5% 12% 25% 18% 1	2090
October	1st to 10th	Day	47% 4 8% 24% 16% 1	3480
	11th to 20th	Day	36% 3 9% 28% 22% 1	2993
	21st to end	Day	38% 4 10% 25% 20% 4	3081
November	1st to 10th	Day	37% 5% 16% 25% 16% 2	1761
	11th to 20th	Day	38% 6% 12% 20% 20% 4	1800
	21st to end	Day	45% 6% 16% 20% 12% 1	1724
December	1st to 10th	Day	51% 6% 13% 19% 10% 1	1520
	11th to 20th	Day	46% 5% 10% 19% 17% 2	1906
	21st to end	Day	54% 7% 10% 18% 9% 2	2772
January	1st to 10th	Night	41% 7% 14% 25% 10% 3	4429
	11th to 20th	Night	45% 9% 15% 18% 10% 2	4440
	21st to end	Night	52% 8% 9% 19% 11% 2	4884
February	1st to 10th	Night	47% 6% 13% 18% 13% 3	2507
	11th to 20th	Night	44% 6% 10% 21% 16% 3	2220
	21st to end	Night	44% 6% 12% 20% 14% 5%	1884
March	1st to 10th	Night	55% 4 10% 17% 11% 3	3734
	11th to 20th	Night	45% 11% 11% 18% 12% 3	3590
	21st to end	Night	51% 5% 7% 15% 17% 5%	3639
April	1st to 10th	Night	49% 5% 9% 19% 15% 3	1900
	11th to 20th	Night	46% 6% 9% 21% 17% 1	1808
	21st to end	Night	48% 7% 11% 17% 14% 4	1710
May	1st to 10th	Night	54% 10% 10% 17% 8% 1	2840
	11th to 20th	Night	50% 11% 13% 16% 7% 2	2692
	21st to end	Night	40% 7% 19% 19% 13% 2	2739
June	1st to 10th	Night	49% 7% 13% 19% 12% 1	1520
	11th to 20th	Night	43% 7% 15% 20% 13% 2	1520
	21st to end	Night	47% 7% 15% 20% 9% 2	1520
July	1st to 10th	Night	41% 6% 17% 22% 12% 1	2480
	11th to 20th	Night	40% 5% 16% 26% 14%	2472
	21st to end	Night	41% 6% 13% 28% 12% 1	2651
August	1st to 10th	Night	52% 5% 14% 20% 8%	2683
	11th to 20th	Night	46% 6% 16% 22% 11%	2809
	21st to end	Night	37% 5% 15% 26% 17% 1	3379
September	1st to 10th	Night	33% 6% 13% 30% 16% 1	1914
	11th to 20th	Night	34% 5% 11% 30% 19% 2	2090
	21st to end	Night	37% 6% 12% 28% 15% 2	2090
October	1st to 10th	Night	47% 4 12% 22% 14% 1	3480
	11th to 20th	Night	34% 4 10% 27% 22% 2	3920
	21st to end	Night	42% 3 9% 26% 17% 3	4467
November	1st to 10th	Night	40% 6% 11% 27% 15% 2	2537
	11th to 20th	Night	41% 6% 11% 23% 17% 3	2600
	21st to end	Night	43% 5% 15% 22% 13% 1	2548
December	1st to 10th	Night	51% 6% 11% 22% 10% 1	2660
	11th to 20th	Night	46% 6% 11% 18% 17% 1	3288
	21st to end	Night	53% 6% 10% 20% 10% 1	4884

Seeing (when cloud cover <= 80%)
Color Meanings: Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	25% 20% 23% 23% 9%	180
	11th to 20th	Day	23% 22% 26% 23% 4 2	180
	21st to end	Day	20% 16% 33% 24% 8%	198
February	1st to 10th	Day	28% 17% 33% 19% 4	308
	11th to 20th	Day	21% 21% 36% 18% 4	456
	21st to end	Day	24% 16% 31% 24% 5%	382
March	1st to 10th	Day	26% 15% 33% 21% 5%	460
	11th to 20th	Day	25% 19% 32% 17% 6% 1	460
	21st to end	Day	27% 18% 31% 14% 8% 3	506
April	1st to 10th	Day	28% 20% 26% 17% 7% 2	460
	11th to 20th	Day	26% 20% 29% 15% 7% 3	452
	21st to end	Day	29% 19% 29% 15% 6% 2	460
May	1st to 10th	Day	31% 16% 26% 20% 5% 2	463
	11th to 20th	Day	20% 17% 34% 16% 9% 2	487
	21st to end	Day	19% 15% 31% 23% 10% 2	529
June	1st to 10th	Day	20% 13% 34% 22% 9% 1	490
	11th to 20th	Day	16% 16% 28% 26% 12% 2	490
	21st to end	Day	22% 10% 33% 21% 11% 2	490
July	1st to 10th	Day	17% 8% 31% 27% 13% 4	485
	11th to 20th	Day	14% 6% 33% 31% 12% 4	484
	21st to end	Day	16% 6% 31% 28% 15% 4	532
August	1st to 10th	Day	14% 8% 25% 30% 19% 5%	486
	11th to 20th	Day	16% 7% 25% 30% 13% 8%	479
	21st to end	Day	12% 10% 24% 31% 16% 7%	539
September	1st to 10th	Day	13% 8% 28% 24% 19% 7%	490
	11th to 20th	Day	15% 13% 23% 21% 16% 13%	490
	21st to end	Day	17% 10% 28% 26% 13% 7%	490
October	1st to 10th	Day	23% 12% 22% 23% 15% 5%	490
	11th to 20th	Day	20% 13% 26% 22% 16% 2	410
	21st to end	Day	31% 12% 25% 23% 8%	429
November	1st to 10th	Day	23% 16% 27% 24% 9% 2	395
	11th to 20th	Day	27% 15% 28% 22% 7% 1	400
	21st to end	Day	29% 16% 24% 23% 7% 1	360
December	1st to 10th	Day	24% 21% 26% 19% 10%	180
	11th to 20th	Day	27% 17% 35% 17% 4	180
	21st to end	Day	29% 20% 27% 18% 5% 1	198
January	1st to 10th	Night	21% 10% 37% 27% 4	760
	11th to 20th	Night	25% 13% 31% 28% 4	760
	21st to end	Night	18% 13% 37% 28% 4	836
February	1st to 10th	Night	21% 10% 37% 28% 3	760
	11th to 20th	Night	17% 12% 43% 25% 3	743
	21st to end	Night	20% 12% 34% 29% 5%	628
March	1st to 10th	Night	23% 13% 36% 26% 3	760
	11th to 20th	Night	21% 14% 33% 26% 7%	760
	21st to end	Night	24% 13% 32% 25% 6% 1	836
April	1st to 10th	Night	26% 11% 31% 28% 4	760
	11th to 20th	Night	21% 13% 34% 27% 6%	684
	21st to end	Night	25% 14% 30% 26% 5%	570
May	1st to 10th	Night	24% 11% 27% 31% 6% 1	570
	11th to 20th	Night	21% 10% 29% 33% 8% 1	492
	21st to end	Night	20% 6% 24% 38% 11% 1	411
June	1st to 10th	Night	23% 6% 26% 35% 10% 1	380
	11th to 20th	Night	18% 5% 24% 37% 14% 1	380
	21st to end	Night	22% 2 22% 41% 13%	380
July	1st to 10th	Night	14% 3 21% 45% 18%	370
	11th to 20th	Night	16% 2 18% 44% 20% 1	368
	21st to end	Night	16% 1 15% 48% 18% 1	416
August	1st to 10th	Night	16% 2 17% 45% 18% 1	487
	11th to 20th	Night	15% 3 25% 37% 18% 2	562
	21st to end	Night	16% 4 19% 39% 20% 3	778
September	1st to 10th	Night	15% 3 26% 35% 19% 2	760
	11th to 20th	Night	18% 5% 23% 28% 21% 4	760
	21st to end	Night	17% 7% 26% 30% 18% 2	760
October	1st to 10th	Night	21% 8% 21% 33% 15% 2	760
	11th to 20th	Night	21% 9% 29% 28% 13% 1	760
	21st to end	Night	28% 10% 28% 28% 6%	836
November	1st to 10th	Night	20% 11% 31% 30% 8% 1	780
	11th to 20th	Night	21% 13% 32% 27% 7% 1	800
	21st to end	Night	22% 15% 30% 27% 6% 1	779
December	1st to 10th	Night	26% 7% 38% 24% 5% 1	760
	11th to 20th	Night	24% 12% 33% 28% 4	760
	21st to end	Night	26% 11% 33% 26% 3	836

Page generated at 2024-11-22 08:02:24. Version ac07

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