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 2024-04-10.

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% 5% 8% 6% 3 4 4 5% 6% 29%	83214
	Night	17% 13% 5% 9% 6% 3 4 4 5% 6% 28%	85532
Transparency	Day	57% 3 9% 19% 10% 1	82921
	Night	58% 3 9% 18% 10% 1	85359
Seeing	Day	25% 17% 30% 18% 7% 2	13706
	Night	24% 14% 30% 22% 9% 1	22992

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% 21% 8% 16% 6% 2 2 3 3 4 20%	2517
	11th to 20th	Day	13% 15% 10% 18% 11% 4 4 3 3 4 14%	2529
	21st to end	Day	17% 20% 11% 12% 7% 3 3 3 2 3 18%	3124
February	1st to 10th	Day	12% 17% 7% 15% 11% 4 4 3 4 4 18%	1710
	11th to 20th	Day	13% 15% 8% 13% 6% 5% 4 3 4 4 25%	1663
	21st to end	Day	17% 17% 6% 9% 7% 5% 5% 4 4 5% 22%	1465
March	1st to 10th	Day	18% 17% 4 9% 6% 2 4 4 4 6% 26%	3361
	11th to 20th	Day	11% 18% 7% 11% 7% 3 5% 4 4 6% 24%	3480
	21st to end	Day	14% 10% 4 7% 5% 3 4 3 4 5% 40%	3860
April	1st to 10th	Day	21% 14% 5% 7% 6% 3 4 3 5% 6% 27%	2270
	11th to 20th	Day	22% 11% 4 5% 4 2 4 4 3 5% 36%	2166
	21st to end	Day	22% 13% 4 7% 5% 2 3 4 3 6% 32%	2340
May	1st to 10th	Day	19% 9% 3 6% 7% 3 5% 4 6% 6% 33%	2437
	11th to 20th	Day	18% 8% 3 6% 5% 3 4 4 4 7% 37%	2478
	21st to end	Day	15% 6% 3 7% 5% 4 5% 5% 5% 7% 38%	2725
June	1st to 10th	Day	23% 7% 3 6% 5% 3 4 5% 5% 7% 31%	2520
	11th to 20th	Day	18% 6% 2 6% 5% 3 5% 4 6% 8% 35%	2520
	21st to end	Day	17% 7% 3 6% 6% 4 6% 5% 6% 8% 33%	2657
July	1st to 10th	Day	15% 5% 2 5% 5% 4 5% 5% 6% 8% 40%	2534
	11th to 20th	Day	13% 6% 3 6% 6% 4 5% 6% 6% 8% 37%	2520
	21st to end	Day	13% 6% 3 7% 7% 3 5% 5% 6% 9% 35%	2719
August	1st to 10th	Day	14% 6% 3 6% 7% 4 6% 6% 6% 7% 34%	2327
	11th to 20th	Day	14% 6% 2 7% 6% 4 6% 5% 6% 7% 36%	2303
	21st to end	Day	15% 7% 3 5% 5% 3 6% 6% 7% 8% 35%	2451
September	1st to 10th	Day	17% 7% 3 5% 4 3 5% 4 5% 7% 38%	2160
	11th to 20th	Day	15% 7% 2 6% 5% 3 4 4 5% 7% 42%	2133
	21st to end	Day	20% 8% 3 5% 6% 3 5% 4 6% 6% 35%	1895
October	1st to 10th	Day	23% 9% 4 7% 5% 3 3 4 5% 6% 32%	1800
	11th to 20th	Day	27% 12% 4 7% 7% 4 5% 4 4 5% 23%	1800
	21st to end	Day	29% 14% 4 7% 6% 3 4 3 4 5% 20%	1958
November	1st to 10th	Day	17% 14% 4 6% 5% 3 4 4 4 7% 30%	1554
	11th to 20th	Day	18% 17% 7% 9% 7% 3 4 4 5% 6% 22%	1520
	21st to end	Day	21% 21% 7% 10% 6% 3 4 3 3 4 16%	1520
December	1st to 10th	Day	19% 23% 8% 11% 7% 3 4 4 4 3 14%	1520
	11th to 20th	Day	17% 17% 10% 14% 6% 2 3 3 3 4 20%	1906
	21st to end	Day	24% 22% 8% 11% 6% 2 2 3 2 4 15%	2772
January	1st to 10th	Night	17% 19% 10% 14% 7% 3 4 3 4 4 15%	4429
	11th to 20th	Night	12% 15% 8% 17% 13% 5% 5% 4 4 5% 12%	4426
	21st to end	Night	17% 17% 9% 13% 8% 5% 5% 4 4 4 16%	4532
February	1st to 10th	Night	12% 18% 7% 12% 8% 5% 5% 5% 5% 6% 17%	2470
	11th to 20th	Night	12% 13% 9% 13% 7% 3 4 4 4 5% 26%	2403
	21st to end	Night	14% 16% 5% 10% 8% 3 6% 5% 5% 5% 23%	1989
March	1st to 10th	Night	17% 14% 5% 8% 7% 3 4 4 4 5% 28%	3476
	11th to 20th	Night	13% 18% 8% 9% 5% 3 4 5% 5% 6% 25%	3479
	21st to end	Night	14% 9% 4 7% 7% 3 4 4 6% 7% 34%	3771
April	1st to 10th	Night	21% 14% 5% 7% 5% 3 3 3 4 5% 29%	1900
	11th to 20th	Night	18% 12% 4 6% 4 2 4 3 4 5% 38%	1758
	21st to end	Night	20% 11% 3 6% 6% 3 4 4 6% 5% 31%	1620
May	1st to 10th	Night	19% 6% 1 5% 5% 3 5% 5% 5% 7% 37%	1522
	11th to 20th	Night	15% 6% 3 5% 5% 3 4 6% 6% 8% 40%	1415
	21st to end	Night	11% 6% 2 5% 4 3 4 5% 6% 8% 46%	1550
June	1st to 10th	Night	16% 8% 4 5% 6% 3 5% 4 6% 8% 36%	1440
	11th to 20th	Night	13% 7% 2 4 4 3 4 5% 6% 7% 44%	1440
	21st to end	Night	15% 9% 3 6% 6% 2 4 5% 5% 6% 40%	1287
July	1st to 10th	Night	10% 4 2 5% 6% 3 6% 5% 4 8% 47%	1412
	11th to 20th	Night	13% 5% 3 6% 4 3 4 5% 6% 7% 44%	1440
	21st to end	Night	10% 5% 3 5% 5% 4 5% 5% 5% 9% 46%	1596
August	1st to 10th	Night	10% 5% 2 5% 4 3 4 6% 5% 9% 47%	1611
	11th to 20th	Night	10% 5% 3 5% 5% 3 5% 5% 5% 8% 44%	1598
	21st to end	Night	12% 6% 2 6% 6% 3 4 4 6% 7% 44%	1885
September	1st to 10th	Night	13% 6% 3 5% 5% 3 4 4 5% 8% 45%	1800
	11th to 20th	Night	14% 6% 2 5% 5% 2 4 4 5% 7% 47%	1825
	21st to end	Night	19% 7% 3 5% 5% 3 4 4 4 6% 40%	2064
October	1st to 10th	Night	20% 8% 3 5% 5% 3 5% 4 5% 6% 36%	2160
	11th to 20th	Night	24% 12% 4 6% 6% 3 4 4 4 5% 27%	2160
	21st to end	Night	24% 15% 5% 7% 6% 3 3 5% 4 6% 23%	2398
November	1st to 10th	Night	19% 13% 4 7% 5% 3 4 4 5% 6% 32%	2524
	11th to 20th	Night	18% 13% 6% 8% 6% 3 4 4 5% 6% 26%	2660
	21st to end	Night	21% 17% 5% 10% 7% 3 5% 4 4 5% 19%	2660
December	1st to 10th	Night	20% 23% 8% 10% 6% 4 4 4 4 4 13%	2660
	11th to 20th	Night	17% 21% 7% 12% 6% 3 3 3 3 5% 19%	3288
	21st to end	Night	25% 21% 8% 11% 8% 3 3 3 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 8% 18% 10% 2	2270
	11th to 20th	Day	54% 3 6% 22% 14% 1	2166
	21st to end	Day	56% 3 7% 18% 12% 3	2340
May	1st to 10th	Day	52% 3 8% 21% 13% 3	2437
	11th to 20th	Day	49% 3 7% 24% 15% 1	2482
	21st to end	Day	46% 5% 12% 20% 14% 3	2725
June	1st to 10th	Day	53% 3 9% 21% 12% 1	2520
	11th to 20th	Day	46% 4 11% 25% 13% 2	2520
	21st to end	Day	49% 4 13% 22% 11% 1	2657
July	1st to 10th	Day	41% 4 11% 30% 13% 2	2464
	11th to 20th	Day	43% 4 12% 28% 11% 1	2445
	21st to end	Day	46% 4 12% 28% 10%	2567
August	1st to 10th	Day	49% 4 14% 23% 10% 1	2314
	11th to 20th	Day	46% 4 14% 26% 8% 1	2303
	21st to end	Day	45% 4 14% 26% 10% 1	2451
September	1st to 10th	Day	45% 4 12% 27% 11% 1	2160
	11th to 20th	Day	42% 3 12% 29% 12% 1	2133
	21st to end	Day	50% 4 11% 24% 10%	1895
October	1st to 10th	Day	54% 3 10% 20% 12% 1	1800
	11th to 20th	Day	66% 3 10% 13% 7% 1	1800
	21st to end	Day	68% 3 9% 14% 6%	1958
November	1st to 10th	Day	56% 3 14% 20% 7% 1	1554
	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	50% 3 7% 23% 16% 1	1758
	21st to end	Night	55% 3 7% 18% 15% 2	1620
May	1st to 10th	Night	46% 4 10% 20% 17% 3	1522
	11th to 20th	Night	42% 4 8% 26% 18% 2	1416
	21st to end	Night	37% 4 16% 23% 17% 3	1551
June	1st to 10th	Night	47% 4 12% 23% 13% 1	1440
	11th to 20th	Night	40% 3 11% 28% 17% 1	1440
	21st to end	Night	46% 4 15% 24% 11% 1	1287
July	1st to 10th	Night	35% 4 12% 26% 20% 2	1372
	11th to 20th	Night	39% 4 13% 30% 14%	1392
	21st to end	Night	36% 5% 15% 31% 13% 1	1507
August	1st to 10th	Night	35% 5% 18% 28% 13% 1	1600
	11th to 20th	Night	37% 5% 16% 29% 12% 1	1598
	21st to end	Night	40% 4 14% 29% 11% 1	1885
September	1st to 10th	Night	38% 5% 14% 28% 14% 1	1800
	11th to 20th	Night	40% 2 13% 32% 12% 1	1825
	21st to end	Night	46% 4 10% 29% 10%	2064
October	1st to 10th	Night	49% 4 11% 21% 14% 1	2160
	11th to 20th	Night	60% 4 12% 18% 6%	2160
	21st to end	Night	63% 4 9% 13% 9% 1	2398
November	1st to 10th	Night	55% 3 12% 22% 8%	2524
	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%	457
	11th to 20th	Day	35% 21% 20% 16% 6% 2	412
	21st to end	Day	31% 16% 33% 12% 7% 1	420
May	1st to 10th	Day	29% 16% 28% 17% 6% 3	423
	11th to 20th	Day	24% 15% 34% 16% 8% 3	447
	21st to end	Day	22% 17% 31% 19% 9% 3	485
June	1st to 10th	Day	26% 14% 34% 20% 5% 1	450
	11th to 20th	Day	20% 15% 30% 22% 9% 3	450
	21st to end	Day	18% 14% 33% 24% 9% 2	587
July	1st to 10th	Day	15% 8% 33% 31% 11% 3	459
	11th to 20th	Day	19% 10% 30% 25% 12% 3	444
	21st to end	Day	18% 11% 32% 27% 9% 2	488
August	1st to 10th	Day	15% 8% 32% 29% 10% 6%	446
	11th to 20th	Day	17% 7% 26% 32% 13% 5%	439
	21st to end	Day	19% 11% 29% 23% 12% 6%	495
September	1st to 10th	Day	16% 14% 30% 21% 13% 6%	450
	11th to 20th	Day	17% 10% 25% 23% 18% 7%	450
	21st to end	Day	23% 14% 27% 22% 11% 4	450
October	1st to 10th	Day	28% 17% 21% 19% 11% 3	450
	11th to 20th	Day	33% 22% 27% 14% 3 1	450
	21st to end	Day	37% 18% 27% 14% 4	484
November	1st to 10th	Day	31% 17% 32% 17% 3 1	248
	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	27% 16% 29% 18% 9% 1	694
	21st to end	Night	25% 12% 30% 22% 10%	540
May	1st to 10th	Night	23% 10% 27% 28% 12% 1	442
	11th to 20th	Night	19% 9% 35% 29% 8%	354
	21st to end	Night	14% 10% 34% 29% 12% 1	389
June	1st to 10th	Night	19% 8% 34% 30% 7% 1	360
	11th to 20th	Night	17% 11% 25% 33% 13% 1	360
	21st to end	Night	19% 8% 24% 34% 15%	360
July	1st to 10th	Night	11% 7% 27% 36% 19% 1	350
	11th to 20th	Night	15% 6% 26% 34% 18% 1	348
	21st to end	Night	10% 6% 29% 37% 18%	416
August	1st to 10th	Night	12% 5% 23% 34% 24% 2	537
	11th to 20th	Night	11% 4 20% 40% 23% 2	534
	21st to end	Night	16% 7% 27% 29% 19% 2	697
September	1st to 10th	Night	15% 9% 27% 29% 17% 3	720
	11th to 20th	Night	19% 7% 23% 31% 17% 4	720
	21st to end	Night	24% 10% 21% 27% 15% 3	720
October	1st to 10th	Night	24% 12% 27% 23% 13% 1	720
	11th to 20th	Night	30% 16% 28% 18% 7% 1	720
	21st to end	Night	36% 15% 26% 19% 4	792
November	1st to 10th	Night	27% 14% 27% 25% 6%	740
	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 2024-04-07 09:28:12. Version ac07

Copyright © 2024 Attilla Danko.