Osceola (MO)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Osceola (MO) clear sky chart from 2005-11-06 to 2024-03-06.

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	13% 8% 3 5% 5% 3 4 4 5% 7% 43%	78661
	Night	13% 7% 3 5% 4 3 4 4 4 6% 46%	80885
Transparency	Day	41% 6% 11% 24% 15% 2	78384
	Night	39% 5% 11% 25% 17% 3	80682
Seeing	Day	16% 11% 27% 27% 15% 3	14596
	Night	16% 11% 31% 29% 12% 1	24646

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	15% 10% 4 6% 5% 3 4 4 4 5% 40%	2847
	11th to 20th	Day	12% 12% 4 8% 4 3 5% 4 4 5% 38%	2850
	21st to end	Day	17% 16% 4 7% 4 2 3 4 3 4 37%	3135
February	1st to 10th	Day	15% 11% 5% 8% 5% 2 3 3 4 6% 37%	1710
	11th to 20th	Day	14% 9% 5% 6% 4 3 4 4 4 6% 41%	1664
	21st to end	Day	16% 10% 4 5% 5% 3 4 4 5% 6% 39%	1637
March	1st to 10th	Day	14% 9% 4 6% 5% 3 3 3 4 6% 43%	2035
	11th to 20th	Day	23% 11% 4 5% 4 2 4 3 4 6% 34%	1980
	21st to end	Day	23% 11% 3 7% 4 3 4 3 4 6% 31%	2178
April	1st to 10th	Day	14% 7% 2 6% 4 4 4 5% 5% 6% 43%	2117
	11th to 20th	Day	18% 8% 2 5% 5% 2 4 4 5% 6% 40%	2134
	21st to end	Day	21% 8% 3 6% 5% 3 4 4 4 7% 35%	2182
May	1st to 10th	Day	20% 7% 3 5% 5% 3 4 4 5% 7% 36%	2340
	11th to 20th	Day	17% 6% 2 6% 5% 3 4 4 5% 7% 41%	2302
	21st to end	Day	14% 7% 3 7% 7% 4 6% 5% 6% 9% 33%	2633
June	1st to 10th	Day	7% 4 2 5% 4 4 4 5% 7% 9% 48%	2520
	11th to 20th	Day	9% 4 2 5% 5% 3 6% 6% 5% 9% 46%	2520
	21st to end	Day	5% 2 1 4 4 3 4 5% 7% 9% 55%	2520
July	1st to 10th	Day	9% 5% 2 6% 6% 4 6% 5% 7% 10% 42%	2376
	11th to 20th	Day	4 3 1 4 5% 3 6% 5% 7% 9% 53%	2340
	21st to end	Day	9% 5% 3 4 6% 3 5% 6% 7% 10% 42%	2546
August	1st to 10th	Day	7% 4 2 5% 6% 4 5% 6% 7% 10% 44%	2328
	11th to 20th	Day	8% 5% 2 4 5% 4 5% 5% 5% 9% 47%	2285
	21st to end	Day	7% 4 2 4 5% 3 4 4 5% 8% 54%	2376
September	1st to 10th	Day	11% 5% 2 5% 5% 3 4 4 5% 6% 50%	2160
	11th to 20th	Day	10% 5% 2 5% 5% 3 4 4 4 6% 51%	2070
	21st to end	Day	8% 5% 2 3 4 3 4 5% 5% 7% 54%	1926
October	1st to 10th	Day	12% 5% 2 4 3 3 3 3 4 6% 54%	1800
	11th to 20th	Day	15% 5% 2 5% 3 2 3 3 3 5% 54%	1800
	21st to end	Day	20% 7% 2 5% 4 2 3 3 2 5% 47%	1980
November	1st to 10th	Day	12% 6% 2 4 3 2 2 3 4 5% 57%	1858
	11th to 20th	Day	16% 7% 3 4 4 2 3 3 4 6% 49%	1696
	21st to end	Day	16% 8% 3 5% 3 3 3 3 4 6% 45%	1520
December	1st to 10th	Day	12% 11% 4 6% 3 2 3 4 5% 6% 44%	1520
	11th to 20th	Day	14% 11% 4 5% 5% 3 3 4 4 5% 43%	1918
	21st to end	Day	18% 18% 5% 7% 5% 3 4 3 4 6% 28%	2858
January	1st to 10th	Night	11% 10% 4 11% 6% 3 4 3 3 5% 40%	4108
	11th to 20th	Night	13% 8% 3 8% 8% 5% 7% 5% 3 5% 35%	4120
	21st to end	Night	20% 14% 4 6% 4 2 3 3 3 4 36%	4532
February	1st to 10th	Night	14% 12% 5% 5% 4 3 4 4 5% 6% 38%	2470
	11th to 20th	Night	14% 8% 4 6% 4 3 3 4 4 6% 44%	2403
	21st to end	Night	16% 9% 3 5% 4 4 3 3 4 5% 44%	1829
March	1st to 10th	Night	15% 7% 3 5% 4 2 3 4 5% 5% 47%	2041
	11th to 20th	Night	20% 8% 3 5% 4 3 4 4 4 5% 41%	1980
	21st to end	Night	21% 8% 4 6% 5% 3 4 5% 5% 6% 34%	2178
April	1st to 10th	Night	11% 7% 3 4 4 2 3 3 5% 7% 51%	1841
	11th to 20th	Night	15% 8% 2 5% 4 2 3 3 5% 6% 47%	1775
	21st to end	Night	19% 5% 3 5% 6% 2 3 4 4 7% 41%	1774
May	1st to 10th	Night	14% 6% 3 5% 5% 3 4 5% 5% 7% 41%	1620
	11th to 20th	Night	16% 6% 2 5% 5% 2 3 4 4 7% 46%	1593
	21st to end	Night	13% 4 3 5% 4 3 5% 5% 5% 9% 43%	1638
June	1st to 10th	Night	5% 3 2 4 4 2 4 5% 8% 10% 54%	1440
	11th to 20th	Night	5% 3 2 4 3 3 4 6% 8% 11% 51%	1440
	21st to end	Night	4 2 1 2 3 2 4 4 5% 10% 63%	1440
July	1st to 10th	Night	8% 4 2 4 5% 3 3 5% 5% 11% 51%	1577
	11th to 20th	Night	4 2 1 3 3 2 4 5% 6% 11% 59%	1620
	21st to end	Night	7% 3 2 4 4 3 4 5% 7% 10% 51%	1772
August	1st to 10th	Night	5% 3 2 4 5% 3 4 5% 8% 9% 52%	1611
	11th to 20th	Night	6% 4 1 4 4 3 4 3 6% 7% 57%	1614
	21st to end	Night	4 4 2 3 4 2 4 4 6% 8% 58%	1980
September	1st to 10th	Night	10% 4 2 4 3 2 3 4 5% 7% 56%	1800
	11th to 20th	Night	10% 4 2 4 4 3 4 4 6% 7% 52%	1886
	21st to end	Night	7% 3 2 5% 4 2 3 3 5% 7% 58%	2016
October	1st to 10th	Night	9% 4 2 3 3 2 4 4 5% 6% 58%	2160
	11th to 20th	Night	15% 5% 2 3 4 2 3 4 4 5% 55%	2160
	21st to end	Night	16% 6% 2 4 3 3 3 3 4 5% 51%	2376
November	1st to 10th	Night	11% 5% 2 3 2 2 3 4 4 5% 60%	2220
	11th to 20th	Night	13% 6% 2 4 4 3 3 2 3 6% 52%	2481
	21st to end	Night	17% 8% 3 4 4 2 3 3 4 5% 49%	2660
December	1st to 10th	Night	13% 10% 4 5% 4 3 4 4 4 6% 43%	2660
	11th to 20th	Night	15% 9% 3 7% 4 3 3 4 4 5% 42%	3279
	21st to end	Night	18% 19% 5% 9% 4 2 3 3 3 4 30%	4791

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	47% 3 8% 27% 14% 1	2848
	11th to 20th	Day	49% 4 10% 25% 12%	2850
	21st to end	Day	52% 4 9% 18% 16% 2	3135
February	1st to 10th	Day	50% 5% 10% 22% 11% 1	1710
	11th to 20th	Day	46% 4 12% 20% 14% 3	1673
	21st to end	Day	48% 3 8% 22% 13% 6%	1637
March	1st to 10th	Day	44% 4 9% 22% 17% 4	2035
	11th to 20th	Day	52% 4 10% 19% 12% 3	1980
	21st to end	Day	56% 6% 13% 17% 8% 1	2178
April	1st to 10th	Day	41% 6% 12% 24% 16% 2	2117
	11th to 20th	Day	44% 5% 12% 22% 15% 1	2134
	21st to end	Day	50% 5% 11% 22% 11% 1	2182
May	1st to 10th	Day	48% 7% 13% 19% 13% 1	2340
	11th to 20th	Day	43% 8% 13% 23% 13%	2306
	21st to end	Day	47% 8% 12% 21% 10% 1	2633
June	1st to 10th	Day	31% 9% 17% 26% 16% 1	2520
	11th to 20th	Day	34% 7% 16% 27% 14% 2	2520
	21st to end	Day	25% 7% 15% 33% 16% 3	2520
July	1st to 10th	Day	36% 8% 13% 25% 14% 3	2312
	11th to 20th	Day	25% 9% 15% 28% 20% 3	2271
	21st to end	Day	33% 9% 14% 30% 13% 1	2405
August	1st to 10th	Day	33% 10% 18% 24% 15% 1	2314
	11th to 20th	Day	33% 7% 13% 31% 15% 1	2285
	21st to end	Day	29% 7% 11% 27% 20% 6%	2376
September	1st to 10th	Day	35% 6% 11% 27% 16% 5%	2160
	11th to 20th	Day	34% 6% 9% 24% 26% 2	2070
	21st to end	Day	29% 7% 10% 26% 24% 4	1926
October	1st to 10th	Day	33% 5% 9% 26% 22% 4	1800
	11th to 20th	Day	35% 3 7% 28% 21% 5%	1800
	21st to end	Day	43% 4 7% 23% 18% 6%	1980
November	1st to 10th	Day	31% 4 11% 29% 21% 4	1858
	11th to 20th	Day	39% 2 9% 22% 23% 4	1696
	21st to end	Day	42% 4 9% 26% 18% 1	1520
December	1st to 10th	Day	42% 4 10% 31% 13% 1	1520
	11th to 20th	Day	45% 4 9% 25% 15% 2	1915
	21st to end	Day	58% 5% 10% 18% 8% 1	2858
January	1st to 10th	Night	47% 4 14% 23% 12% 1	4108
	11th to 20th	Night	52% 4 11% 23% 10% 1	4120
	21st to end	Night	53% 3 11% 20% 12% 1	4532
February	1st to 10th	Night	46% 5% 11% 22% 14% 2	2470
	11th to 20th	Night	42% 4 10% 24% 16% 3	2404
	21st to end	Night	44% 3 8% 23% 17% 6%	1829
March	1st to 10th	Night	40% 4 9% 22% 20% 5%	2041
	11th to 20th	Night	46% 5% 9% 22% 15% 3	1980
	21st to end	Night	51% 6% 11% 20% 11% 1	2178
April	1st to 10th	Night	33% 5% 12% 24% 22% 4	1841
	11th to 20th	Night	39% 4 10% 25% 18% 4	1775
	21st to end	Night	44% 6% 10% 25% 15% 1	1774
May	1st to 10th	Night	42% 7% 11% 23% 16% 1	1620
	11th to 20th	Night	39% 7% 14% 23% 15% 2	1594
	21st to end	Night	38% 9% 15% 26% 11% 1	1639
June	1st to 10th	Night	24% 8% 18% 30% 17% 3	1440
	11th to 20th	Night	24% 10% 14% 29% 21% 3	1440
	21st to end	Night	17% 6% 16% 33% 22% 6%	1440
July	1st to 10th	Night	29% 6% 15% 30% 16% 4	1532
	11th to 20th	Night	19% 7% 14% 30% 26% 4	1566
	21st to end	Night	26% 7% 15% 33% 18% 1	1673
August	1st to 10th	Night	26% 8% 15% 34% 14% 2	1601
	11th to 20th	Night	26% 5% 10% 34% 25% 1	1614
	21st to end	Night	24% 6% 13% 25% 25% 7%	1980
September	1st to 10th	Night	27% 5% 12% 28% 20% 7%	1800
	11th to 20th	Night	30% 6% 10% 22% 27% 5%	1886
	21st to end	Night	26% 4 9% 27% 29% 4	2016
October	1st to 10th	Night	26% 6% 10% 26% 25% 7%	2160
	11th to 20th	Night	33% 4 8% 25% 24% 7%	2160
	21st to end	Night	37% 4 9% 22% 23% 5%	2376
November	1st to 10th	Night	28% 4 12% 27% 22% 6%	2220
	11th to 20th	Night	36% 3 7% 26% 24% 4	2481
	21st to end	Night	40% 4 8% 26% 19% 3	2660
December	1st to 10th	Night	43% 5% 12% 24% 16% 1	2660
	11th to 20th	Night	44% 4 10% 26% 16% 1	3281
	21st to end	Night	60% 3 9% 17% 9% 2	4791

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% 20% 35% 23% 2	270
	11th to 20th	Day	31% 20% 37% 11% 1	270
	21st to end	Day	18% 22% 46% 11% 3	297
February	1st to 10th	Day	23% 23% 36% 16% 1	270
	11th to 20th	Day	20% 26% 38% 11% 4	270
	21st to end	Day	26% 26% 36% 10% 2	225
March	1st to 10th	Day	20% 25% 38% 15% 2	255
	11th to 20th	Day	32% 18% 30% 17% 3	240
	21st to end	Day	39% 19% 31% 9% 2	264
April	1st to 10th	Day	20% 20% 34% 20% 5% 1	377
	11th to 20th	Day	23% 16% 40% 17% 4	412
	21st to end	Day	25% 16% 32% 21% 5%	442
May	1st to 10th	Day	21% 14% 37% 21% 6%	603
	11th to 20th	Day	18% 14% 30% 25% 10% 2	625
	21st to end	Day	16% 8% 31% 25% 16% 4	679
June	1st to 10th	Day	7% 4 21% 38% 25% 5%	630
	11th to 20th	Day	10% 4 24% 38% 22% 3	630
	21st to end	Day	5% 7% 31% 36% 18% 3	630
July	1st to 10th	Day	10% 3 14% 32% 32% 10%	621
	11th to 20th	Day	4 2 18% 42% 28% 6%	618
	21st to end	Day	9% 2 14% 36% 32% 6%	684
August	1st to 10th	Day	8% 2 15% 43% 25% 5%	626
	11th to 20th	Day	8% 4 18% 36% 29% 6%	599
	21st to end	Day	10% 2 12% 31% 35% 10%	495
September	1st to 10th	Day	11% 4 15% 37% 26% 7%	450
	11th to 20th	Day	8% 2 18% 41% 25% 6%	360
	21st to end	Day	10% 8% 24% 37% 17% 4	270
October	1st to 10th	Day	15% 9% 29% 27% 14% 6%	270
	11th to 20th	Day	18% 18% 37% 22% 5%	270
	21st to end	Day	33% 13% 32% 18% 4 1	297
November	1st to 10th	Day	17% 16% 37% 21% 8% 1	270
	11th to 20th	Day	18% 21% 32% 19% 8% 1	270
	21st to end	Day	24% 19% 30% 23% 4	270
December	1st to 10th	Day	17% 18% 39% 18% 7% 2	270
	11th to 20th	Day	21% 19% 35% 21% 3 1	270
	21st to end	Day	21% 29% 36% 13% 1	297
January	1st to 10th	Night	17% 17% 38% 23% 5%	950
	11th to 20th	Night	20% 18% 37% 20% 4	950
	21st to end	Night	18% 17% 38% 24% 3	1045
February	1st to 10th	Night	21% 16% 41% 20% 3	950
	11th to 20th	Night	20% 17% 38% 22% 3	929
	21st to end	Night	23% 18% 37% 18% 3	573
March	1st to 10th	Night	18% 18% 36% 24% 4	557
	11th to 20th	Night	25% 12% 33% 26% 4 1	540
	21st to end	Night	23% 16% 35% 22% 4 1	594
April	1st to 10th	Night	16% 14% 37% 28% 5%	540
	11th to 20th	Night	19% 15% 34% 24% 7%	533
	21st to end	Night	21% 9% 41% 23% 7%	540
May	1st to 10th	Night	16% 8% 34% 33% 9%	540
	11th to 20th	Night	16% 8% 30% 32% 14% 1	531
	21st to end	Night	14% 6% 28% 31% 19% 2	584
June	1st to 10th	Night	6% 3 19% 41% 29% 1	540
	11th to 20th	Night	6% 2 26% 45% 20% 1	540
	21st to end	Night	5% 1 27% 47% 18% 1	540
July	1st to 10th	Night	11% 2 13% 38% 33% 4	525
	11th to 20th	Night	3 1 17% 44% 31% 3	522
	21st to end	Night	7% 2 13% 40% 37% 2	591
August	1st to 10th	Night	5% 2 15% 46% 30% 2	537
	11th to 20th	Night	7% 2 13% 47% 27% 4	534
	21st to end	Night	5% 1 15% 35% 40% 4	594
September	1st to 10th	Night	11% 2 16% 42% 26% 4	540
	11th to 20th	Night	13% 2 16% 39% 26% 4	540
	21st to end	Night	8% 5% 22% 41% 20% 3	576
October	1st to 10th	Night	10% 5% 29% 32% 21% 3	720
	11th to 20th	Night	17% 10% 38% 27% 7%	720
	21st to end	Night	19% 14% 33% 26% 7% 1	792
November	1st to 10th	Night	13% 10% 38% 28% 10% 1	740
	11th to 20th	Night	16% 15% 36% 25% 7%	844
	21st to end	Night	21% 13% 37% 22% 6%	950
December	1st to 10th	Night	18% 15% 37% 24% 5%	950
	11th to 20th	Night	23% 13% 34% 26% 4	950
	21st to end	Night	21% 17% 36% 22% 2	1045

Page generated at 2024-03-03 05:28:54. Version ac07

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