Lake Ozark North Shore
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lake Ozark North Shore clear sky chart from 2005-11-06 to 2025-10-04.

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	12% 7% 2 6% 4 4 4 3 5% 7% 44%	126342
	Night	13% 8% 3 6% 4 4 4 3 5% 6% 45%	123265
Transparency	Day	39% 5% 11% 25% 17% 3	129948
	Night	39% 4 10% 25% 18% 4	127736
Seeing	Day	19% 11% 29% 25% 14% 3	16895
	Night	18% 11% 30% 28% 12% 1	26630

By Month

Percentage Cloud Cover SE (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	16% 11% 4 9% 4 4 4 2 5% 5% 36%	3939
	11th to 20th	Day	9% 12% 3 8% 4 5% 4 3 4 5% 42%	4080
	21st to end	Day	16% 11% 4 7% 3 3 4 3 5% 5% 39%	4488
February	1st to 10th	Day	16% 12% 4 9% 5% 4 3 3 4 5% 33%	1800
	11th to 20th	Day	16% 11% 2 7% 5% 4 4 3 4 5% 40%	1795
	21st to end	Day	16% 11% 3 6% 3 4 5% 3 5% 6% 39%	1660
March	1st to 10th	Day	16% 9% 3 5% 2 3 2 2 4 4 49%	4936
	11th to 20th	Day	10% 6% 2 5% 3 3 4 3 4 6% 53%	4980
	21st to end	Day	14% 10% 3 8% 5% 5% 5% 4 6% 7% 34%	5494
April	1st to 10th	Day	15% 7% 3 7% 5% 4 4 4 5% 7% 43%	2400
	11th to 20th	Day	17% 8% 2 6% 4 4 5% 3 5% 6% 41%	2374
	21st to end	Day	20% 8% 3 7% 5% 4 4 3 5% 6% 34%	2400
May	1st to 10th	Day	16% 7% 3 7% 5% 5% 5% 4 6% 8% 34%	5757
	11th to 20th	Day	13% 7% 2 7% 5% 5% 5% 4 5% 7% 39%	5945
	21st to end	Day	19% 7% 2 6% 4 4 4 3 5% 6% 41%	6935
June	1st to 10th	Day	9% 5% 2 5% 4 4 4 4 7% 10% 45%	2800
	11th to 20th	Day	8% 5% 1 5% 4 4 5% 4 7% 9% 47%	2800
	21st to end	Day	6% 4 1 4 4 4 4 5% 7% 9% 52%	2800
July	1st to 10th	Day	10% 6% 2 6% 4 4 4 4 6% 8% 45%	6344
	11th to 20th	Day	7% 6% 2 7% 4 5% 5% 5% 7% 9% 42%	5900
	21st to end	Day	6% 4 1 6% 4 5% 5% 5% 8% 12% 43%	6422
August	1st to 10th	Day	5% 3 1 5% 4 4 5% 4 7% 10% 52%	4234
	11th to 20th	Day	10% 5% 2 6% 4 4 4 4 6% 7% 47%	4044
	21st to end	Day	6% 4 2 5% 4 3 4 4 5% 9% 53%	4312
September	1st to 10th	Day	10% 5% 2 5% 4 3 4 3 6% 7% 50%	2400
	11th to 20th	Day	10% 6% 2 5% 4 3 4 3 4 7% 51%	2393
	21st to end	Day	7% 6% 2 5% 3 4 3 3 5% 7% 55%	2088
October	1st to 10th	Day	11% 5% 2 4 3 3 3 3 4 6% 57%	1930
	11th to 20th	Day	15% 5% 2 4 2 3 3 2 4 5% 54%	1900
	21st to end	Day	20% 7% 2 5% 3 2 3 3 3 6% 46%	2090
November	1st to 10th	Day	13% 6% 2 4 3 3 3 2 4 6% 54%	1927
	11th to 20th	Day	15% 6% 2 5% 3 3 3 3 4 6% 49%	1775
	21st to end	Day	18% 10% 2 5% 2 2 3 3 4 6% 45%	1600
December	1st to 10th	Day	9% 10% 3 6% 3 3 3 2 4 5% 52%	2610
	11th to 20th	Day	13% 9% 3 6% 4 3 3 3 4 5% 47%	3008
	21st to end	Day	21% 20% 5% 10% 3 3 4 2 3 4 25%	3982
January	1st to 10th	Night	15% 11% 6% 12% 6% 4 4 3 3 4 32%	6008
	11th to 20th	Night	12% 9% 4 12% 5% 6% 4 3 4 4 38%	5900
	21st to end	Night	17% 11% 5% 7% 4 3 3 2 4 4 40%	6490
February	1st to 10th	Night	15% 12% 4 8% 5% 4 4 4 5% 6% 36%	2600
	11th to 20th	Night	15% 9% 3 7% 4 3 4 2 5% 6% 41%	2490
	21st to end	Night	15% 9% 4 6% 4 3 4 4 4 6% 42%	1980
March	1st to 10th	Night	18% 11% 3 5% 3 3 3 2 4 4 45%	4924
	11th to 20th	Night	13% 7% 2 4 2 3 3 3 5% 7% 51%	4980
	21st to end	Night	15% 10% 3 7% 5% 4 4 3 5% 6% 36%	5433
April	1st to 10th	Night	12% 7% 3 5% 4 3 3 2 5% 8% 50%	2000
	11th to 20th	Night	15% 9% 2 4 3 3 3 3 5% 7% 46%	1975
	21st to end	Night	18% 8% 2 5% 5% 4 4 3 5% 8% 38%	2000
May	1st to 10th	Night	17% 8% 3 7% 4 4 4 2 5% 7% 39%	4150
	11th to 20th	Night	12% 8% 2 5% 4 3 4 3 6% 9% 43%	3967
	21st to end	Night	17% 7% 3 5% 4 4 3 3 5% 7% 43%	3942
June	1st to 10th	Night	8% 3 2 5% 4 4 4 3 6% 9% 51%	1600
	11th to 20th	Night	7% 4 2 4 3 3 4 4 7% 10% 52%	1600
	21st to end	Night	3 3 1 3 3 3 3 4 7% 10% 61%	1600
July	1st to 10th	Night	9% 5% 2 6% 4 5% 4 3 5% 10% 47%	3618
	11th to 20th	Night	5% 4 2 6% 4 5% 4 4 6% 10% 50%	4074
	21st to end	Night	5% 4 1 5% 4 4 4 4 7% 11% 50%	4449
August	1st to 10th	Night	3 2 1 4 3 3 3 4 5% 9% 63%	2926
	11th to 20th	Night	10% 5% 3 6% 3 3 4 3 5% 7% 51%	3009
	21st to end	Night	5% 3 1 3 3 3 3 4 5% 9% 60%	3586
September	1st to 10th	Night	11% 4 2 5% 3 3 3 3 5% 7% 56%	2000
	11th to 20th	Night	8% 5% 2 5% 3 3 4 3 5% 7% 54%	2003
	21st to end	Night	8% 5% 1 5% 4 4 3 3 5% 6% 56%	2290
October	1st to 10th	Night	8% 4 1 4 3 3 3 2 5% 7% 60%	2317
	11th to 20th	Night	15% 5% 2 4 4 3 3 3 4 5% 53%	2280
	21st to end	Night	18% 6% 2 5% 4 3 3 2 4 5% 51%	2508
November	1st to 10th	Night	13% 5% 1 4 3 2 2 3 5% 5% 57%	2370
	11th to 20th	Night	14% 7% 2 5% 3 3 3 2 4 6% 50%	2621
	21st to end	Night	17% 9% 3 5% 3 3 3 2 4 5% 47%	2800
December	1st to 10th	Night	10% 9% 3 6% 4 3 3 3 4 5% 49%	4580
	11th to 20th	Night	17% 9% 3 6% 4 3 3 2 4 5% 43%	5199
	21st to end	Night	25% 18% 4 8% 4 3 3 2 3 4 26%	6996

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	50% 4 10% 22% 12% 1	3940
	11th to 20th	Day	45% 3 9% 24% 16% 4	4080
	21st to end	Day	48% 3 9% 16% 18% 6%	4488
February	1st to 10th	Day	54% 4 9% 20% 12% 1	1800
	11th to 20th	Day	49% 2 12% 19% 15% 3	1804
	21st to end	Day	45% 4 8% 24% 15% 5%	1660
March	1st to 10th	Day	40% 2 7% 23% 23% 6%	4936
	11th to 20th	Day	33% 3 8% 24% 25% 7%	4980
	21st to end	Day	49% 6% 13% 25% 6% 1	5496
April	1st to 10th	Day	42% 4 10% 23% 18% 3	2400
	11th to 20th	Day	44% 4 11% 23% 15% 2	2374
	21st to end	Day	51% 5% 10% 20% 13% 1	2400
May	1st to 10th	Day	46% 7% 12% 21% 14%	5794
	11th to 20th	Day	43% 7% 11% 23% 14% 3	5949
	21st to end	Day	44% 5% 9% 26% 16% 1	6949
June	1st to 10th	Day	33% 7% 15% 26% 17% 2	2800
	11th to 20th	Day	32% 7% 13% 28% 17% 3	2800
	21st to end	Day	26% 7% 16% 30% 17% 4	2800
July	1st to 10th	Day	36% 5% 12% 24% 21% 2	6275
	11th to 20th	Day	36% 7% 14% 30% 12% 1	5831
	21st to end	Day	31% 8% 19% 32% 9% 1	6240
August	1st to 10th	Day	26% 6% 19% 29% 20% 1	4220
	11th to 20th	Day	36% 6% 13% 30% 15% 1	4083
	21st to end	Day	28% 6% 13% 34% 15% 4	4311
September	1st to 10th	Day	34% 4 13% 25% 19% 6%	2400
	11th to 20th	Day	34% 4 10% 26% 25% 2	2393
	21st to end	Day	30% 4 9% 28% 25% 4	2088
October	1st to 10th	Day	19% 2 5% 19% 41% 14%	3190
	11th to 20th	Day	23% 2 4 23% 39% 9%	3140
	21st to end	Day	33% 4 7% 26% 27% 3	3428
November	1st to 10th	Day	34% 3 12% 25% 22% 5%	1927
	11th to 20th	Day	39% 3 8% 23% 23% 5%	1775
	21st to end	Day	42% 3 8% 30% 15% 2	1600
December	1st to 10th	Day	36% 4 9% 36% 15% 1	2610
	11th to 20th	Day	41% 3 11% 28% 16% 1	3005
	21st to end	Day	65% 3 10% 14% 7% 1	3982
January	1st to 10th	Night	58% 3 9% 20% 11% 1	6008
	11th to 20th	Night	51% 3 7% 23% 12% 3	5900
	21st to end	Night	48% 3 9% 19% 17% 4	6490
February	1st to 10th	Night	49% 4 10% 21% 14% 2	2600
	11th to 20th	Night	46% 3 11% 21% 16% 3	2491
	21st to end	Night	44% 4 9% 22% 17% 5%	1980
March	1st to 10th	Night	44% 3 7% 20% 22% 4	4924
	11th to 20th	Night	34% 4 7% 23% 26% 7%	4980
	21st to end	Night	47% 6% 12% 23% 10% 1	5433
April	1st to 10th	Night	35% 4 12% 26% 20% 4	2000
	11th to 20th	Night	38% 4 10% 24% 17% 6%	1975
	21st to end	Night	45% 5% 10% 24% 15% 1	2000
May	1st to 10th	Night	44% 6% 14% 20% 14% 2	4178
	11th to 20th	Night	38% 7% 11% 23% 16% 5%	3968
	21st to end	Night	41% 6% 11% 24% 17% 2	3950
June	1st to 10th	Night	30% 6% 15% 29% 17% 3	1600
	11th to 20th	Night	26% 6% 13% 27% 23% 5%	1600
	21st to end	Night	19% 6% 18% 31% 20% 7%	1600
July	1st to 10th	Night	34% 5% 12% 25% 22% 2	3580
	11th to 20th	Night	29% 7% 12% 36% 15% 2	4024
	21st to end	Night	26% 7% 18% 38% 11% 1	4320
August	1st to 10th	Night	19% 5% 20% 31% 24% 2	2916
	11th to 20th	Night	33% 5% 13% 30% 17% 2	3036
	21st to end	Night	21% 4 15% 38% 17% 4	3586
September	1st to 10th	Night	30% 4 10% 26% 24% 7%	2000
	11th to 20th	Night	30% 4 11% 24% 26% 4	2003
	21st to end	Night	29% 4 9% 26% 29% 4	2290
October	1st to 10th	Night	15% 2 6% 21% 44% 11%	3837
	11th to 20th	Night	23% 3 6% 21% 32% 16%	3779
	21st to end	Night	32% 3 6% 30% 26% 3	4120
November	1st to 10th	Night	30% 4 11% 28% 21% 6%	2370
	11th to 20th	Night	37% 3 6% 25% 24% 5%	2621
	21st to end	Night	42% 3 9% 27% 17% 3	2800
December	1st to 10th	Night	37% 4 9% 35% 14% 1	4580
	11th to 20th	Night	45% 3 10% 24% 17% 1	5201
	21st to end	Night	63% 4 11% 15% 6% 1	6996

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	26% 18% 40% 14% 2	300
	11th to 20th	Day	35% 20% 37% 8% 1	300
	21st to end	Day	23% 21% 40% 13% 3	330
February	1st to 10th	Day	30% 21% 36% 12% 1	300
	11th to 20th	Day	33% 23% 33% 9% 3	300
	21st to end	Day	35% 18% 35% 10% 2	249
March	1st to 10th	Day	23% 25% 39% 10% 2	300
	11th to 20th	Day	34% 17% 31% 16% 2 1	300
	21st to end	Day	36% 23% 30% 10% 1	337
April	1st to 10th	Day	27% 18% 33% 17% 4 1	500
	11th to 20th	Day	31% 17% 30% 17% 4	492
	21st to end	Day	28% 16% 31% 20% 5%	500
May	1st to 10th	Day	24% 15% 35% 20% 6%	649
	11th to 20th	Day	22% 12% 29% 25% 11% 2	725
	21st to end	Day	18% 10% 35% 22% 12% 3	789
June	1st to 10th	Day	10% 6% 27% 31% 20% 5%	730
	11th to 20th	Day	10% 3 29% 38% 18% 2	730
	21st to end	Day	7% 7% 35% 34% 14% 3	730
July	1st to 10th	Day	12% 3 17% 28% 32% 8%	721
	11th to 20th	Day	6% 4 22% 37% 26% 4	718
	21st to end	Day	9% 4 18% 36% 27% 6%	794
August	1st to 10th	Day	9% 3 22% 40% 22% 4	726
	11th to 20th	Day	10% 4 22% 33% 26% 6%	640
	21st to end	Day	9% 2 17% 30% 31% 10%	583
September	1st to 10th	Day	13% 4 15% 36% 27% 6%	530
	11th to 20th	Day	8% 5% 21% 33% 24% 10%	523
	21st to end	Day	12% 9% 25% 32% 17% 5%	330
October	1st to 10th	Day	16% 7% 29% 25% 18% 4	309
	11th to 20th	Day	22% 16% 34% 22% 6%	300
	21st to end	Day	32% 19% 31% 16% 2	330
November	1st to 10th	Day	20% 14% 38% 19% 7% 1	300
	11th to 20th	Day	26% 15% 35% 16% 7% 1	300
	21st to end	Day	34% 14% 28% 21% 3 1	300
December	1st to 10th	Day	20% 21% 35% 17% 6% 2	300
	11th to 20th	Day	26% 15% 41% 14% 4	300
	21st to end	Day	30% 23% 35% 11% 2	330
January	1st to 10th	Night	22% 18% 35% 20% 5%	1000
	11th to 20th	Night	23% 22% 33% 18% 4	1000
	21st to end	Night	22% 18% 36% 22% 2	1100
February	1st to 10th	Night	23% 18% 37% 19% 3	1000
	11th to 20th	Night	24% 17% 37% 20% 2	936
	21st to end	Night	28% 17% 34% 18% 2	660
March	1st to 10th	Night	23% 16% 36% 22% 3	605
	11th to 20th	Night	26% 11% 34% 24% 3 1	600
	21st to end	Night	30% 13% 33% 21% 3	660
April	1st to 10th	Night	19% 16% 36% 24% 5%	600
	11th to 20th	Night	25% 12% 34% 23% 6%	593
	21st to end	Night	22% 12% 36% 23% 7%	600
May	1st to 10th	Night	18% 8% 35% 31% 8%	600
	11th to 20th	Night	18% 7% 28% 32% 14% 1	591
	21st to end	Night	16% 6% 28% 30% 18% 2	650
June	1st to 10th	Night	10% 4 20% 38% 27% 2	600
	11th to 20th	Night	8% 3 27% 38% 22% 2	600
	21st to end	Night	5% 3 27% 45% 19% 2	600
July	1st to 10th	Night	12% 2 13% 36% 32% 5%	585
	11th to 20th	Night	4 2 18% 42% 31% 3	582
	21st to end	Night	8% 1 17% 37% 34% 3	657
August	1st to 10th	Night	6% 1 16% 47% 28% 2	597
	11th to 20th	Night	7% 3 15% 42% 31% 3	594
	21st to end	Night	7% 1 15% 38% 34% 5%	660
September	1st to 10th	Night	12% 2 17% 37% 28% 3	600
	11th to 20th	Night	10% 3 17% 35% 30% 5%	600
	21st to end	Night	11% 5% 23% 33% 24% 3	690
October	1st to 10th	Night	9% 6% 29% 30% 23% 3	773
	11th to 20th	Night	19% 11% 34% 27% 10%	760
	21st to end	Night	23% 12% 33% 23% 8%	836
November	1st to 10th	Night	16% 12% 36% 27% 9%	780
	11th to 20th	Night	21% 15% 32% 25% 7%	821
	21st to end	Night	25% 14% 33% 20% 7%	1000
December	1st to 10th	Night	24% 15% 33% 23% 5%	1000
	11th to 20th	Night	26% 12% 33% 25% 4	1000
	21st to end	Night	27% 16% 34% 20% 3	1100

Page generated at 2025-10-01 00:39:04. Version ac07

Copyright © 2025 Attilla Danko.