Haliburton Scout Reserve
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Haliburton Scout Reserve clear sky chart from 2005-11-06 to 2024-11-04.

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% 12% 4 9% 5% 4 4 3 5% 6% 31%	101728
	Night	16% 13% 5% 9% 5% 4 4 3 5% 6% 30%	97251
Transparency	Day	55% 3 10% 21% 10% 1	105300
	Night	56% 3 10% 20% 10% 1	101767
Seeing	Day	25% 16% 30% 19% 7% 2	14540
	Night	24% 14% 29% 23% 9% 1	23609

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	15% 22% 7% 17% 5% 3 3 2 3 3 20%	2517
	11th to 20th	Day	12% 16% 10% 20% 9% 6% 4 2 3 4 14%	2529
	21st to end	Day	17% 21% 11% 14% 5% 4 3 2 2 3 17%	3124
February	1st to 10th	Day	12% 19% 7% 17% 9% 5% 3 3 4 4 18%	1710
	11th to 20th	Day	12% 16% 8% 14% 5% 6% 4 2 4 4 25%	1663
	21st to end	Day	17% 18% 5% 11% 6% 6% 4 4 4 4 22%	1465
March	1st to 10th	Day	17% 18% 4 10% 5% 3 4 3 4 6% 25%	3361
	11th to 20th	Day	10% 19% 6% 12% 6% 4 5% 4 4 6% 24%	3480
	21st to end	Day	14% 11% 4 8% 4 5% 3 3 4 5% 40%	3860
April	1st to 10th	Day	19% 15% 4 8% 5% 5% 4 2 5% 6% 28%	2280
	11th to 20th	Day	23% 12% 3 6% 4 3 3 3 3 4 34%	2288
	21st to end	Day	22% 13% 4 7% 4 3 3 3 3 6% 32%	2470
May	1st to 10th	Day	20% 9% 3 7% 6% 4 4 3 5% 7% 32%	4289
	11th to 20th	Day	17% 9% 3 7% 5% 4 4 4 5% 8% 34%	4398
	21st to end	Day	17% 6% 2 7% 4 4 5% 3 5% 7% 40%	4837
June	1st to 10th	Day	22% 8% 3 7% 5% 5% 4 4 5% 7% 30%	2660
	11th to 20th	Day	17% 7% 2 7% 5% 5% 5% 4 6% 8% 35%	2660
	21st to end	Day	18% 7% 3 7% 5% 5% 5% 4 6% 8% 32%	2805
July	1st to 10th	Day	14% 6% 2 6% 5% 5% 5% 4 7% 9% 34%	4454
	11th to 20th	Day	13% 6% 2 6% 4 5% 4 4 6% 7% 41%	4440
	21st to end	Day	10% 7% 3 7% 5% 4 4 4 6% 8% 43%	4763
August	1st to 10th	Day	17% 8% 4 8% 5% 5% 5% 4 6% 7% 32%	4104
	11th to 20th	Day	18% 7% 2 7% 5% 5% 6% 4 7% 7% 33%	4044
	21st to end	Day	10% 6% 2 6% 4 5% 6% 5% 7% 9% 40%	4311
September	1st to 10th	Day	18% 7% 2 6% 4 4 5% 3 5% 7% 39%	2280
	11th to 20th	Day	14% 7% 2 6% 4 5% 4 3 5% 7% 44%	2251
	21st to end	Day	20% 8% 3 6% 5% 5% 4 3 6% 6% 35%	2000
October	1st to 10th	Day	22% 9% 3 8% 4 4 3 3 5% 6% 32%	1900
	11th to 20th	Day	25% 13% 3 8% 5% 5% 5% 2 4 5% 24%	1900
	21st to end	Day	28% 15% 4 8% 5% 3 4 3 4 5% 21%	2066
November	1st to 10th	Day	17% 15% 3 7% 5% 4 4 3 4 7% 30%	1581
	11th to 20th	Day	17% 18% 6% 10% 5% 4 4 3 5% 6% 22%	1520
	21st to end	Day	21% 22% 7% 11% 5% 4 4 2 3 4 16%	1520
December	1st to 10th	Day	19% 24% 7% 13% 6% 4 3 3 4 3 14%	1520
	11th to 20th	Day	17% 19% 8% 15% 4 3 3 2 3 4 20%	1906
	21st to end	Day	23% 23% 7% 13% 5% 3 3 2 2 4 15%	2772
January	1st to 10th	Night	17% 20% 9% 16% 5% 4 3 3 4 4 15%	4429
	11th to 20th	Night	12% 16% 7% 19% 11% 7% 4 3 4 4 12%	4426
	21st to end	Night	17% 17% 8% 15% 6% 6% 4 3 4 4 16%	4532
February	1st to 10th	Night	12% 19% 7% 13% 7% 6% 5% 4 5% 5% 17%	2470
	11th to 20th	Night	12% 15% 7% 14% 6% 5% 4 3 4 5% 26%	2403
	21st to end	Night	14% 17% 5% 11% 7% 5% 6% 4 5% 5% 23%	1989
March	1st to 10th	Night	17% 15% 5% 10% 6% 4 4 3 4 5% 28%	3476
	11th to 20th	Night	13% 19% 7% 9% 4 4 4 4 5% 5% 25%	3479
	21st to end	Night	14% 9% 5% 8% 6% 4 4 3 6% 6% 34%	3771
April	1st to 10th	Night	20% 16% 4 7% 4 4 2 3 4 5% 29%	1900
	11th to 20th	Night	18% 13% 3 7% 4 3 3 2 5% 5% 37%	1857
	21st to end	Night	20% 12% 3 7% 5% 4 4 3 5% 5% 31%	1710
May	1st to 10th	Night	20% 7% 2 7% 4 4 5% 4 5% 6% 36%	2651
	11th to 20th	Night	17% 7% 3 7% 4 4 5% 4 6% 8% 35%	2495
	21st to end	Night	13% 8% 2 6% 4 4 4 3 5% 7% 43%	2738
June	1st to 10th	Night	16% 9% 3 6% 5% 4 4 3 6% 7% 35%	1520
	11th to 20th	Night	12% 7% 2 5% 4 4 4 4 6% 7% 43%	1520
	21st to end	Night	17% 9% 3 6% 5% 3 3 4 5% 6% 38%	1358
July	1st to 10th	Night	10% 6% 2 8% 6% 5% 5% 4 5% 7% 40%	2479
	11th to 20th	Night	16% 7% 2 6% 3 4 4 3 5% 6% 44%	2520
	21st to end	Night	10% 6% 2 5% 4 4 4 3 5% 8% 48%	2787
August	1st to 10th	Night	12% 5% 2 6% 4 4 5% 5% 5% 8% 46%	2825
	11th to 20th	Night	16% 10% 2 6% 3 4 4 3 4 7% 41%	2785
	21st to end	Night	13% 5% 2 5% 4 4 4 3 6% 8% 47%	3311
September	1st to 10th	Night	13% 7% 2 6% 4 4 4 3 5% 7% 46%	1900
	11th to 20th	Night	13% 6% 2 6% 3 3 4 2 5% 6% 48%	1927
	21st to end	Night	19% 8% 3 6% 4 3 4 3 4 6% 40%	2179
October	1st to 10th	Night	20% 9% 3 6% 4 4 4 3 5% 6% 37%	2280
	11th to 20th	Night	23% 12% 4 7% 6% 4 4 3 4 5% 28%	2280
	21st to end	Night	23% 15% 4 9% 5% 3 4 4 4 6% 24%	2532
November	1st to 10th	Night	18% 14% 3 8% 4 5% 3 3 5% 6% 31%	2570
	11th to 20th	Night	18% 15% 5% 9% 5% 4 4 4 5% 6% 26%	2660
	21st to end	Night	20% 18% 5% 11% 6% 4 4 3 4 5% 19%	2660
December	1st to 10th	Night	20% 24% 7% 11% 6% 4 4 3 4 4 13%	2660
	11th to 20th	Night	17% 23% 6% 13% 5% 3 3 2 3 5% 19%	3288
	21st to end	Night	25% 22% 8% 13% 6% 3 3 2 3 4 12%	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	71% 2 9% 10% 7% 1	2518
	11th to 20th	Day	77% 2 5% 9% 6% 1	2529
	21st to end	Day	74% 2 5% 11% 6% 2	3124
February	1st to 10th	Day	71% 3 7% 14% 5% 1	1710
	11th to 20th	Day	64% 3 8% 13% 10% 2	1672
	21st to end	Day	65% 3 7% 13% 11% 1	1465
March	1st to 10th	Day	61% 2 12% 12% 11% 1	3364
	11th to 20th	Day	62% 3 9% 16% 8% 1	3480
	21st to end	Day	48% 2 7% 23% 16% 3	3860
April	1st to 10th	Day	60% 2 7% 19% 10% 2	2280
	11th to 20th	Day	55% 3 6% 22% 13% 1	2288
	21st to end	Day	56% 3 7% 19% 12% 3	2470
May	1st to 10th	Day	53% 2 7% 25% 11% 2	4301
	11th to 20th	Day	51% 2 10% 27% 10% 1	4402
	21st to end	Day	45% 3 13% 21% 15% 3	4837
June	1st to 10th	Day	54% 3 9% 21% 12% 1	2660
	11th to 20th	Day	46% 4 11% 25% 13% 2	2660
	21st to end	Day	50% 4 12% 22% 11% 1	2805
July	1st to 10th	Day	46% 3 14% 26% 10% 1	4384
	11th to 20th	Day	41% 3 14% 31% 10%	4365
	21st to end	Day	39% 3 11% 33% 13%	4611
August	1st to 10th	Day	52% 3 13% 23% 9% 1	4091
	11th to 20th	Day	49% 3 13% 27% 7%	4083
	21st to end	Day	39% 4 12% 34% 10% 1	4311
September	1st to 10th	Day	45% 4 11% 27% 11% 1	2280
	11th to 20th	Day	41% 3 12% 29% 14% 1	2251
	21st to end	Day	51% 4 11% 23% 12%	2000
October	1st to 10th	Day	50% 3 10% 26% 9% 1	3160
	11th to 20th	Day	56% 2 10% 20% 11% 1	3140
	21st to end	Day	63% 2 11% 17% 5%	3380
November	1st to 10th	Day	55% 3 13% 21% 7% 1	1581
	11th to 20th	Day	64% 4 11% 14% 7% 2	1520
	21st to end	Day	74% 3 7% 10% 5% 1	1520
December	1st to 10th	Day	76% 3 7% 10% 5% 1	1520
	11th to 20th	Day	71% 2 5% 11% 8% 1	1906
	21st to end	Day	77% 1 4 13% 5%	2772
January	1st to 10th	Night	75% 2 8% 12% 4	4429
	11th to 20th	Night	77% 1 7% 9% 5% 1	4426
	21st to end	Night	74% 3 7% 10% 7% 1	4532
February	1st to 10th	Night	68% 4 8% 13% 7% 1	2470
	11th to 20th	Night	62% 3 8% 17% 9%	2405
	21st to end	Night	63% 4 6% 17% 9% 1	1989
March	1st to 10th	Night	60% 2 9% 16% 11% 1	3486
	11th to 20th	Night	61% 2 11% 18% 7% 1	3480
	21st to end	Night	49% 3 7% 25% 14% 2	3771
April	1st to 10th	Night	59% 2 6% 19% 12% 2	1900
	11th to 20th	Night	51% 2 7% 23% 15% 1	1857
	21st to end	Night	55% 3 7% 17% 15% 2	1710
May	1st to 10th	Night	49% 2 10% 23% 14% 2	2658
	11th to 20th	Night	47% 3 10% 27% 11% 1	2496
	21st to end	Night	42% 2 12% 26% 17% 2	2739
June	1st to 10th	Night	48% 4 11% 23% 13% 1	1520
	11th to 20th	Night	40% 3 12% 28% 17% 1	1520
	21st to end	Night	47% 4 14% 23% 11% 1	1358
July	1st to 10th	Night	44% 4 14% 22% 16% 1	2439
	11th to 20th	Night	42% 3 11% 32% 12%	2472
	21st to end	Night	36% 4 13% 32% 14%	2698
August	1st to 10th	Night	37% 4 16% 27% 15% 2	2814
	11th to 20th	Night	45% 3 16% 25% 10% 1	2812
	21st to end	Night	36% 4 13% 34% 11% 2	3311
September	1st to 10th	Night	38% 5% 14% 29% 13% 1	1900
	11th to 20th	Night	38% 2 13% 33% 13% 1	1927
	21st to end	Night	46% 4 10% 28% 12%	2179
October	1st to 10th	Night	41% 3 10% 28% 18%	3800
	11th to 20th	Night	53% 2 13% 22% 10%	3779
	21st to end	Night	57% 3 16% 17% 7% 1	4168
November	1st to 10th	Night	55% 3 12% 22% 8%	2570
	11th to 20th	Night	59% 4 11% 17% 7% 2	2660
	21st to end	Night	68% 3 9% 14% 5%	2660
December	1st to 10th	Night	75% 3 7% 10% 4	2660
	11th to 20th	Night	70% 2 7% 13% 7%	3288
	21st to end	Night	79% 2 5% 10% 4	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	21% 29% 30% 14% 4 1	180
	11th to 20th	Day	28% 21% 35% 13% 3 1	184
	21st to end	Day	26% 20% 35% 15% 4	297
February	1st to 10th	Day	29% 28% 33% 8% 3	270
	11th to 20th	Day	28% 31% 34% 6%	270
	21st to end	Day	36% 22% 33% 8%	277
March	1st to 10th	Day	26% 20% 36% 15% 3	460
	11th to 20th	Day	27% 20% 33% 14% 4 1	460
	21st to end	Day	32% 20% 30% 14% 4 1	506
April	1st to 10th	Day	30% 21% 31% 12% 6%	460
	11th to 20th	Day	38% 21% 19% 14% 6% 2	452
	21st to end	Day	32% 17% 31% 12% 7% 1	460
May	1st to 10th	Day	29% 16% 29% 18% 6% 3	463
	11th to 20th	Day	23% 15% 33% 18% 9% 2	487
	21st to end	Day	21% 18% 31% 19% 9% 3	529
June	1st to 10th	Day	26% 15% 32% 21% 5% 1	490
	11th to 20th	Day	19% 14% 33% 22% 9% 3	490
	21st to end	Day	21% 14% 32% 23% 9% 1	635
July	1st to 10th	Day	15% 9% 33% 29% 10% 3	499
	11th to 20th	Day	18% 11% 31% 25% 12% 3	484
	21st to end	Day	17% 11% 32% 27% 10% 3	532
August	1st to 10th	Day	15% 8% 32% 29% 10% 6%	486
	11th to 20th	Day	18% 7% 25% 31% 14% 5%	479
	21st to end	Day	18% 11% 30% 24% 12% 5%	539
September	1st to 10th	Day	18% 13% 29% 22% 12% 5%	490
	11th to 20th	Day	16% 9% 23% 22% 19% 10%	490
	21st to end	Day	24% 13% 26% 23% 11% 3	490
October	1st to 10th	Day	27% 17% 23% 18% 11% 3	490
	11th to 20th	Day	32% 22% 28% 14% 3 1	490
	21st to end	Day	37% 19% 27% 14% 3	526
November	1st to 10th	Day	30% 17% 33% 16% 3 1	257
	11th to 20th	Day	32% 23% 28% 13% 2 2	180
	21st to end	Day	35% 22% 34% 7% 2 1	180
December	1st to 10th	Day	33% 18% 33% 14% 1 1	180
	11th to 20th	Day	39% 24% 25% 10% 2 1	180
	21st to end	Day	30% 25% 31% 10% 3 1	198
January	1st to 10th	Night	29% 19% 31% 15% 4 1	760
	11th to 20th	Night	31% 17% 31% 16% 4	760
	21st to end	Night	20% 15% 36% 21% 6% 1	836
February	1st to 10th	Night	23% 23% 33% 19% 2	760
	11th to 20th	Night	22% 20% 38% 16% 3	743
	21st to end	Night	26% 21% 32% 17% 3	628
March	1st to 10th	Night	24% 19% 36% 16% 4	760
	11th to 20th	Night	23% 19% 35% 18% 4 1	760
	21st to end	Night	22% 16% 32% 21% 8%	836
April	1st to 10th	Night	29% 18% 29% 19% 5%	760
	11th to 20th	Night	28% 16% 29% 18% 8% 1	733
	21st to end	Night	25% 12% 30% 22% 10%	570
May	1st to 10th	Night	22% 10% 27% 29% 12% 1	466
	11th to 20th	Night	19% 9% 34% 30% 8%	374
	21st to end	Night	15% 11% 33% 29% 11% 1	411
June	1st to 10th	Night	20% 8% 33% 31% 7% 1	380
	11th to 20th	Night	16% 11% 26% 33% 13% 1	380
	21st to end	Night	21% 8% 23% 33% 14%	380
July	1st to 10th	Night	11% 7% 27% 36% 18% 1	370
	11th to 20th	Night	15% 6% 26% 34% 18% 1	368
	21st to end	Night	10% 6% 28% 38% 18%	440
August	1st to 10th	Night	12% 5% 22% 35% 24% 2	567
	11th to 20th	Night	13% 4 19% 39% 23% 2	564
	21st to end	Night	16% 7% 27% 30% 19% 2	736
September	1st to 10th	Night	15% 9% 27% 29% 17% 3	760
	11th to 20th	Night	18% 6% 22% 30% 20% 4	760
	21st to end	Night	25% 9% 21% 27% 15% 3	760
October	1st to 10th	Night	23% 12% 27% 23% 13% 1	760
	11th to 20th	Night	30% 16% 28% 19% 7% 1	760
	21st to end	Night	35% 16% 26% 19% 4	836
November	1st to 10th	Night	27% 15% 27% 25% 6%	755
	11th to 20th	Night	29% 16% 33% 16% 6% 1	760
	21st to end	Night	33% 16% 28% 19% 4 1	760
December	1st to 10th	Night	33% 20% 29% 14% 4	760
	11th to 20th	Night	29% 19% 34% 15% 3 1	760
	21st to end	Night	34% 20% 28% 15% 3	836

Page generated at 2024-11-01 22:47:29. Version ac07

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