Great Bend
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Great Bend clear sky chart from 2005-11-06 to 2024-02-10.

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	8% 6% 2 5% 4 2 4 4 5% 7% 53%	78685
	Night	8% 5% 2 5% 4 2 4 4 5% 7% 55%	80346
Transparency	Day	31% 6% 12% 26% 20% 5%	78413
	Night	29% 5% 12% 26% 22% 6%	80141
Seeing	Day	10% 8% 30% 32% 16% 3	14516
	Night	10% 8% 35% 36% 10% 1	24604

By Month

Percentage Cloud Cover SW (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	7% 8% 3 6% 5% 3 4 5% 5% 8% 46%	2847
	11th to 20th	Day	7% 8% 3 7% 7% 4 4 4 6% 7% 44%	2850
	21st to end	Day	8% 10% 4 7% 4 2 3 4 3 5% 49%	3135
February	1st to 10th	Day	7% 10% 4 6% 6% 3 4 3 4 6% 48%	1780
	11th to 20th	Day	5% 5% 3 5% 6% 3 5% 4 6% 7% 51%	1749
	21st to end	Day	8% 6% 2 4 4 2 4 3 5% 8% 54%	1480
March	1st to 10th	Day	7% 5% 2 4 4 2 4 5% 5% 8% 55%	1849
	11th to 20th	Day	12% 8% 3 4 4 2 3 3 4 6% 50%	1980
	21st to end	Day	13% 8% 3 4 4 3 4 4 4 7% 46%	2178
April	1st to 10th	Day	10% 5% 2 5% 4 2 4 4 5% 6% 55%	2042
	11th to 20th	Day	11% 7% 3 5% 5% 3 4 4 5% 6% 47%	2201
	21st to end	Day	14% 6% 2 5% 4 2 4 5% 4 7% 45%	2340
May	1st to 10th	Day	13% 5% 3 6% 4 3 5% 4 5% 6% 47%	2340
	11th to 20th	Day	10% 6% 2 4 4 3 4 3 5% 8% 51%	2302
	21st to end	Day	10% 4 2 5% 6% 4 5% 5% 7% 9% 42%	2531
June	1st to 10th	Day	4 4 1 4 4 3 4 5% 5% 9% 58%	2340
	11th to 20th	Day	5% 3 2 3 5% 3 5% 5% 5% 7% 58%	2340
	21st to end	Day	6% 3 1 3 3 2 4 6% 6% 10% 57%	2340
July	1st to 10th	Day	5% 4 2 4 6% 3 5% 5% 6% 9% 52%	2340
	11th to 20th	Day	3 3 1 3 4 2 5% 6% 7% 8% 57%	2340
	21st to end	Day	6% 4 2 5% 5% 3 5% 6% 7% 10% 47%	2546
August	1st to 10th	Day	6% 4 2 4 4 3 5% 5% 7% 10% 49%	2328
	11th to 20th	Day	6% 4 2 5% 4 3 4 5% 6% 9% 52%	2301
	21st to end	Day	5% 3 2 4 3 2 5% 4 4 7% 60%	2426
September	1st to 10th	Day	9% 4 2 4 4 2 4 4 4 6% 58%	2026
	11th to 20th	Day	9% 4 1 4 4 2 4 4 4 6% 58%	1980
	21st to end	Day	7% 3 2 4 4 2 4 4 5% 6% 59%	1980
October	1st to 10th	Day	12% 4 2 3 3 2 3 3 3 6% 57%	1980
	11th to 20th	Day	8% 4 2 3 2 1 2 3 4 6% 65%	1804
	21st to end	Day	10% 6% 1 4 3 1 3 3 3 6% 59%	1911
November	1st to 10th	Day	6% 4 1 3 3 2 2 4 4 7% 65%	1673
	11th to 20th	Day	7% 4 1 3 4 3 3 4 4 5% 63%	1710
	21st to end	Day	10% 5% 2 3 3 1 2 2 3 5% 64%	1710
December	1st to 10th	Day	7% 5% 2 4 5% 2 3 4 6% 7% 54%	1710
	11th to 20th	Day	7% 7% 3 6% 4 2 3 3 4 7% 55%	2161
	21st to end	Day	7% 12% 5% 8% 6% 3 4 4 5% 7% 40%	3135
January	1st to 10th	Night	6% 9% 4 9% 6% 3 4 3 4 4 47%	4108
	11th to 20th	Night	5% 4 3 5% 5% 3 4 4 5% 6% 56%	4120
	21st to end	Night	11% 8% 4 7% 4 2 3 3 4 4 50%	4532
February	1st to 10th	Night	8% 8% 4 6% 5% 2 4 4 4 5% 50%	2398
	11th to 20th	Night	7% 6% 2 6% 5% 3 4 5% 5% 7% 51%	2098
	21st to end	Night	8% 5% 3 5% 4 2 3 3 5% 6% 57%	1776
March	1st to 10th	Night	7% 5% 2 4 4 2 4 4 5% 7% 56%	2110
	11th to 20th	Night	12% 6% 2 4 3 2 3 4 4 6% 53%	1980
	21st to end	Night	13% 9% 3 5% 4 2 4 4 4 7% 44%	2178
April	1st to 10th	Night	9% 4 1 4 3 2 4 4 6% 9% 54%	1914
	11th to 20th	Night	10% 5% 2 5% 5% 2 3 4 6% 8% 50%	1707
	21st to end	Night	13% 6% 2 4 3 2 4 4 5% 7% 50%	1620
May	1st to 10th	Night	13% 6% 3 6% 5% 3 4 4 5% 8% 44%	1620
	11th to 20th	Night	12% 4 2 3 3 3 3 4 6% 8% 52%	1593
	21st to end	Night	10% 4 2 4 3 2 5% 6% 7% 11% 45%	1745
June	1st to 10th	Night	5% 3 1 2 3 2 3 4 7% 10% 59%	1620
	11th to 20th	Night	5% 2 1 4 3 2 4 6% 7% 11% 55%	1620
	21st to end	Night	4 3 2 3 3 2 4 5% 5% 11% 58%	1620
July	1st to 10th	Night	6% 2 2 5% 5% 2 5% 5% 6% 10% 53%	1620
	11th to 20th	Night	2 3 1 3 3 2 3 4 7% 11% 61%	1620
	21st to end	Night	7% 3 2 3 5% 3 5% 6% 7% 11% 51%	1772
August	1st to 10th	Night	3 3 2 4 6% 3 5% 5% 6% 11% 52%	1611
	11th to 20th	Night	7% 4 2 3 3 3 4 4 5% 10% 54%	1600
	21st to end	Night	4 2 1 4 5% 2 3 4 5% 6% 64%	1927
September	1st to 10th	Night	9% 4 2 3 4 2 2 3 5% 7% 59%	1934
	11th to 20th	Night	7% 4 2 4 3 3 3 4 5% 6% 59%	1980
	21st to end	Night	6% 3 2 4 4 2 3 4 5% 6% 61%	1980
October	1st to 10th	Night	10% 4 2 3 4 2 3 4 4 6% 58%	1980
	11th to 20th	Night	8% 4 1 2 3 1 2 3 4 5% 67%	2137
	21st to end	Night	9% 5% 1 3 3 2 3 3 4 5% 62%	2443
November	1st to 10th	Night	6% 3 2 3 3 1 2 3 4 6% 67%	2405
	11th to 20th	Night	6% 4 1 3 3 2 3 4 4 6% 64%	2470
	21st to end	Night	9% 6% 2 4 3 2 3 4 4 6% 58%	2470
December	1st to 10th	Night	6% 5% 2 4 4 2 4 4 5% 6% 58%	2470
	11th to 20th	Night	8% 4 3 4 4 2 3 3 5% 6% 57%	3036
	21st to end	Night	11% 11% 4 6% 5% 2 4 3 4 6% 44%	4532

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	35% 6% 13% 28% 17% 1	2848
	11th to 20th	Day	39% 7% 16% 22% 12% 5%	2850
	21st to end	Day	38% 5% 13% 27% 16% 2	3135
February	1st to 10th	Day	39% 4 13% 23% 14% 6%	1780
	11th to 20th	Day	32% 6% 15% 24% 15% 7%	1759
	21st to end	Day	30% 3 11% 27% 23% 6%	1480
March	1st to 10th	Day	29% 5% 12% 25% 23% 7%	1849
	11th to 20th	Day	37% 4 10% 20% 23% 6%	1980
	21st to end	Day	38% 6% 13% 27% 12% 4	2178
April	1st to 10th	Day	31% 5% 12% 25% 21% 6%	2042
	11th to 20th	Day	37% 6% 11% 26% 16% 4	2204
	21st to end	Day	39% 5% 11% 28% 16% 1	2340
May	1st to 10th	Day	38% 6% 13% 21% 18% 4	2340
	11th to 20th	Day	32% 7% 15% 30% 14% 1	2306
	21st to end	Day	36% 9% 17% 25% 10% 2	2531
June	1st to 10th	Day	22% 8% 18% 32% 15% 4	2340
	11th to 20th	Day	26% 6% 12% 29% 22% 6%	2340
	21st to end	Day	22% 7% 11% 27% 26% 7%	2340
July	1st to 10th	Day	29% 6% 12% 27% 22% 3	2276
	11th to 20th	Day	20% 8% 15% 26% 24% 7%	2271
	21st to end	Day	29% 8% 14% 28% 19% 2	2405
August	1st to 10th	Day	27% 9% 17% 27% 16% 4	2314
	11th to 20th	Day	27% 7% 12% 29% 19% 6%	2301
	21st to end	Day	23% 6% 10% 27% 24% 9%	2426
September	1st to 10th	Day	29% 5% 8% 26% 23% 10%	2026
	11th to 20th	Day	27% 5% 9% 27% 27% 5%	1980
	21st to end	Day	26% 5% 10% 25% 27% 7%	1980
October	1st to 10th	Day	30% 4 10% 25% 26% 6%	1980
	11th to 20th	Day	22% 3 9% 26% 29% 10%	1804
	21st to end	Day	29% 3 8% 26% 25% 9%	1911
November	1st to 10th	Day	20% 4 11% 30% 29% 7%	1673
	11th to 20th	Day	24% 3 9% 27% 29% 7%	1710
	21st to end	Day	27% 3 8% 28% 29% 6%	1710
December	1st to 10th	Day	29% 5% 13% 29% 21% 3	1710
	11th to 20th	Day	31% 4 9% 32% 22% 3	2159
	21st to end	Day	43% 5% 10% 23% 16% 2	3135
January	1st to 10th	Night	40% 5% 11% 26% 16% 3	4108
	11th to 20th	Night	30% 4 15% 27% 22% 3	4120
	21st to end	Night	38% 4 11% 25% 18% 3	4532
February	1st to 10th	Night	37% 5% 13% 22% 15% 7%	2398
	11th to 20th	Night	33% 4 12% 26% 19% 5%	2098
	21st to end	Night	29% 4 9% 22% 24% 12%	1776
March	1st to 10th	Night	28% 4 10% 24% 24% 9%	2110
	11th to 20th	Night	33% 4 11% 24% 22% 7%	1980
	21st to end	Night	40% 6% 11% 25% 16% 3	2178
April	1st to 10th	Night	27% 6% 13% 23% 26% 5%	1914
	11th to 20th	Night	33% 5% 14% 25% 19% 4	1707
	21st to end	Night	34% 5% 13% 23% 21% 3	1620
May	1st to 10th	Night	39% 7% 11% 20% 18% 5%	1620
	11th to 20th	Night	30% 7% 17% 27% 17% 2	1594
	21st to end	Night	31% 10% 20% 26% 10% 2	1746
June	1st to 10th	Night	20% 7% 20% 31% 19% 4	1620
	11th to 20th	Night	22% 8% 14% 29% 22% 5%	1620
	21st to end	Night	20% 6% 14% 27% 25% 8%	1620
July	1st to 10th	Night	25% 7% 14% 26% 22% 5%	1575
	11th to 20th	Night	15% 6% 17% 27% 27% 7%	1566
	21st to end	Night	26% 7% 14% 31% 20% 2	1673
August	1st to 10th	Night	25% 8% 17% 32% 15% 4	1601
	11th to 20th	Night	27% 5% 14% 29% 21% 4	1600
	21st to end	Night	20% 6% 11% 29% 26% 8%	1927
September	1st to 10th	Night	26% 4 10% 23% 26% 11%	1934
	11th to 20th	Night	25% 5% 10% 23% 30% 7%	1980
	21st to end	Night	24% 4 10% 23% 30% 9%	1980
October	1st to 10th	Night	28% 4 10% 22% 28% 8%	1980
	11th to 20th	Night	20% 4 9% 23% 32% 12%	2137
	21st to end	Night	26% 3 10% 23% 27% 11%	2443
November	1st to 10th	Night	20% 3 10% 27% 29% 11%	2405
	11th to 20th	Night	22% 4 8% 29% 29% 8%	2470
	21st to end	Night	28% 4 8% 25% 24% 10%	2470
December	1st to 10th	Night	27% 5% 12% 29% 22% 5%	2470
	11th to 20th	Night	28% 4 9% 35% 20% 3	3037
	21st to end	Night	41% 4 11% 27% 14% 3	4532

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	10% 11% 39% 29% 9% 2	270
	11th to 20th	Day	15% 11% 43% 21% 8% 1	270
	21st to end	Day	9% 10% 48% 27% 6%	297
February	1st to 10th	Day	15% 15% 43% 21% 6%	267
	11th to 20th	Day	11% 11% 46% 25% 6%	240
	21st to end	Day	10% 19% 46% 22% 4	198
March	1st to 10th	Day	8% 13% 49% 23% 5% 1	240
	11th to 20th	Day	18% 16% 37% 18% 9% 2	240
	21st to end	Day	16% 20% 40% 19% 4 1	264
April	1st to 10th	Day	12% 16% 41% 26% 4 1	302
	11th to 20th	Day	14% 15% 40% 27% 4	482
	21st to end	Day	17% 16% 38% 20% 8% 2	600
May	1st to 10th	Day	13% 10% 37% 29% 10% 1	603
	11th to 20th	Day	16% 7% 32% 27% 15% 3	625
	21st to end	Day	13% 9% 31% 32% 12% 3	679
June	1st to 10th	Day	5% 5% 25% 37% 20% 8%	630
	11th to 20th	Day	5% 5% 33% 38% 17% 2	630
	21st to end	Day	6% 6% 29% 42% 16% 2	630
July	1st to 10th	Day	5% 3 17% 39% 29% 7%	621
	11th to 20th	Day	3 2 17% 42% 31% 6%	618
	21st to end	Day	6% 2 12% 43% 29% 8%	684
August	1st to 10th	Day	8% 2 15% 43% 26% 6%	626
	11th to 20th	Day	6% 2 16% 44% 28% 4	615
	21st to end	Day	7% 3 17% 39% 27% 8%	545
September	1st to 10th	Day	11% 3 16% 35% 31% 4	316
	11th to 20th	Day	4 3 22% 43% 17% 12%	270
	21st to end	Day	11% 6% 30% 27% 21% 4	270
October	1st to 10th	Day	16% 9% 29% 24% 17% 6%	270
	11th to 20th	Day	5% 9% 42% 28% 13% 3	270
	21st to end	Day	18% 14% 32% 23% 12% 2	297
November	1st to 10th	Day	10% 14% 33% 29% 13% 2	270
	11th to 20th	Day	11% 11% 43% 24% 11% 1	270
	21st to end	Day	17% 9% 32% 27% 13% 2	270
December	1st to 10th	Day	8% 10% 39% 29% 12% 3	270
	11th to 20th	Day	12% 9% 42% 29% 8%	270
	21st to end	Day	16% 15% 43% 22% 4	297
January	1st to 10th	Night	9% 9% 38% 37% 7%	950
	11th to 20th	Night	9% 12% 37% 33% 8% 1	950
	21st to end	Night	9% 9% 44% 32% 5%	1045
February	1st to 10th	Night	13% 10% 42% 31% 4	882
	11th to 20th	Night	11% 11% 44% 31% 3	704
	21st to end	Night	10% 15% 42% 29% 4	592
March	1st to 10th	Night	10% 15% 39% 33% 4	670
	11th to 20th	Night	15% 9% 37% 30% 8%	540
	21st to end	Night	17% 14% 41% 23% 4 1	594
April	1st to 10th	Night	12% 12% 44% 26% 5%	540
	11th to 20th	Night	13% 15% 39% 28% 5%	533
	21st to end	Night	16% 13% 36% 28% 7%	540
May	1st to 10th	Night	14% 10% 38% 31% 6%	540
	11th to 20th	Night	15% 7% 31% 36% 10% 1	531
	21st to end	Night	11% 10% 32% 33% 13% 2	584
June	1st to 10th	Night	5% 6% 30% 41% 16% 1	540
	11th to 20th	Night	4 7% 37% 42% 10%	540
	21st to end	Night	3 3 37% 47% 10% 1	540
July	1st to 10th	Night	6% 2 22% 48% 21% 1	525
	11th to 20th	Night	2 2 24% 51% 20% 1	522
	21st to end	Night	7% 2 18% 49% 23% 1	591
August	1st to 10th	Night	4 1 20% 53% 20% 1	537
	11th to 20th	Night	8% 1 19% 51% 19% 1	534
	21st to end	Night	4 1 22% 47% 25% 2	594
September	1st to 10th	Night	10% 2 26% 43% 19% 1	540
	11th to 20th	Night	9% 2 35% 37% 16% 1	540
	21st to end	Night	7% 5% 32% 41% 14% 1	540
October	1st to 10th	Night	12% 6% 32% 34% 15% 1	540
	11th to 20th	Night	9% 8% 40% 32% 9%	697
	21st to end	Night	12% 9% 35% 31% 12% 1	859
November	1st to 10th	Night	8% 8% 35% 37% 11%	925
	11th to 20th	Night	8% 10% 41% 33% 8%	950
	21st to end	Night	12% 10% 32% 34% 10% 1	950
December	1st to 10th	Night	9% 9% 38% 36% 7%	950
	11th to 20th	Night	12% 11% 39% 32% 5%	950
	21st to end	Night	13% 11% 37% 33% 6%	1045

Page generated at 2024-02-07 05:11:54. Version ac07

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