Conecuh National Forest
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Conecuh National Forest clear sky chart from 2005-11-06 to 2024-01-12.

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	11% 6% 3 6% 6% 4 5% 5% 6% 8% 41%	74780
	Night	11% 5% 2 5% 5% 3 4 5% 6% 8% 46%	74937
Transparency	Day	27% 36% 7% 12% 12% 5%	74514
	Night	24% 36% 8% 12% 14% 6%	74722
Seeing	Day	14% 9% 21% 25% 20% 11%	13503
	Night	13% 7% 22% 29% 23% 5%	23524

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% 7% 3 5% 5% 3 4 3 4 7% 43%	1706
	11th to 20th	Day	13% 6% 2 5% 4 3 4 3 5% 6% 48%	1810
	21st to end	Day	19% 6% 3 5% 4 2 3 4 3 6% 45%	1980
February	1st to 10th	Day	16% 7% 2 6% 6% 3 4 3 4 5% 43%	1800
	11th to 20th	Day	15% 6% 3 5% 5% 3 3 4 5% 6% 45%	1748
	21st to end	Day	16% 7% 3 5% 6% 3 5% 4 6% 6% 38%	1480
March	1st to 10th	Day	11% 5% 3 4 5% 3 5% 4 6% 7% 48%	1800
	11th to 20th	Day	15% 5% 3 6% 5% 3 4 5% 5% 6% 43%	1908
	21st to end	Day	11% 5% 3 5% 5% 3 5% 4 4 7% 47%	2259
April	1st to 10th	Day	13% 6% 3 5% 4 3 4 4 5% 7% 47%	2160
	11th to 20th	Day	13% 5% 3 5% 6% 4 5% 4 5% 6% 45%	2134
	21st to end	Day	8% 4 3 4 5% 2 4 5% 5% 6% 53%	2160
May	1st to 10th	Day	8% 4 2 4 5% 3 5% 5% 6% 8% 50%	2222
	11th to 20th	Day	6% 5% 2 6% 7% 4 6% 7% 6% 10% 41%	2301
	21st to end	Day	8% 5% 3 6% 7% 4 6% 6% 6% 9% 40%	2531
June	1st to 10th	Day	10% 6% 3 7% 8% 5% 7% 8% 8% 9% 30%	2340
	11th to 20th	Day	6% 3 2 5% 6% 5% 9% 7% 8% 11% 37%	2340
	21st to end	Day	7% 5% 3 6% 9% 5% 8% 8% 8% 11% 29%	2340
July	1st to 10th	Day	8% 7% 3 7% 9% 7% 8% 8% 9% 11% 24%	2340
	11th to 20th	Day	9% 7% 3 8% 9% 5% 7% 8% 8% 10% 26%	2340
	21st to end	Day	6% 6% 3 7% 7% 5% 9% 8% 8% 11% 29%	2356
August	1st to 10th	Day	8% 5% 2 6% 7% 5% 9% 9% 9% 11% 29%	2148
	11th to 20th	Day	11% 7% 3 8% 8% 4 8% 7% 7% 9% 29%	2125
	21st to end	Day	11% 7% 4 7% 7% 5% 7% 6% 7% 9% 30%	2376
September	1st to 10th	Day	9% 7% 3 7% 7% 5% 6% 7% 7% 9% 35%	2093
	11th to 20th	Day	12% 6% 3 6% 7% 4 7% 5% 6% 7% 37%	1980
	21st to end	Day	9% 5% 2 6% 6% 3 5% 5% 5% 7% 47%	1980
October	1st to 10th	Day	9% 4 2 5% 4 3 4 4 4 6% 54%	1980
	11th to 20th	Day	10% 4 1 4 4 2 3 3 5% 7% 56%	1980
	21st to end	Day	10% 5% 2 4 4 3 4 3 4 5% 55%	1984
November	1st to 10th	Day	9% 4 2 3 3 2 3 4 5% 6% 57%	1672
	11th to 20th	Day	10% 4 2 4 4 3 4 5% 4 7% 53%	1710
	21st to end	Day	14% 4 2 5% 4 3 4 4 5% 7% 49%	1710
December	1st to 10th	Day	14% 6% 2 4 5% 3 5% 3 5% 7% 46%	1710
	11th to 20th	Day	16% 9% 4 5% 4 3 4 4 4 5% 43%	2153
	21st to end	Day	20% 8% 3 5% 4 2 3 3 4 5% 42%	3124
January	1st to 10th	Night	16% 7% 2 4 5% 3 4 3 5% 6% 46%	2455
	11th to 20th	Night	14% 8% 2 5% 3 2 4 4 5% 7% 47%	2179
	21st to end	Night	18% 6% 3 4 4 3 4 4 5% 5% 44%	2376
February	1st to 10th	Night	14% 7% 3 5% 5% 2 3 4 5% 6% 44%	2160
	11th to 20th	Night	18% 7% 2 5% 4 2 3 3 4 5% 47%	2098
	21st to end	Night	16% 9% 2 5% 5% 3 5% 4 5% 5% 41%	1776
March	1st to 10th	Night	12% 6% 3 5% 5% 2 4 3 4 7% 48%	2160
	11th to 20th	Night	13% 5% 2 6% 5% 3 4 5% 6% 7% 44%	2052
	21st to end	Night	11% 5% 2 4 4 2 4 4 6% 7% 50%	2109
April	1st to 10th	Night	11% 6% 2 5% 5% 2 4 4 6% 8% 47%	1800
	11th to 20th	Night	13% 5% 3 4 5% 2 4 4 5% 8% 47%	1775
	21st to end	Night	6% 3 2 4 4 3 4 4 6% 8% 60%	1800
May	1st to 10th	Night	9% 3 2 4 4 2 4 4 5% 8% 54%	1734
	11th to 20th	Night	7% 5% 2 4 5% 4 5% 6% 7% 10% 46%	1592
	21st to end	Night	7% 4 2 4 5% 3 5% 4 7% 10% 48%	1744
June	1st to 10th	Night	9% 5% 2 6% 6% 4 6% 6% 8% 10% 38%	1620
	11th to 20th	Night	6% 3 1 3 5% 2 6% 7% 9% 14% 45%	1620
	21st to end	Night	5% 4 2 6% 7% 4 5% 6% 8% 12% 40%	1620
July	1st to 10th	Night	5% 4 2 6% 5% 4 7% 7% 10% 14% 36%	1620
	11th to 20th	Night	6% 5% 3 5% 6% 5% 6% 7% 7% 14% 36%	1620
	21st to end	Night	3 2 2 4 5% 4 6% 9% 10% 15% 40%	1957
August	1st to 10th	Night	4 3 1 6% 5% 4 6% 8% 10% 11% 40%	1790
	11th to 20th	Night	6% 4 2 5% 8% 5% 6% 7% 10% 13% 33%	1776
	21st to end	Night	9% 6% 3 6% 7% 4 6% 6% 9% 10% 35%	1980
September	1st to 10th	Night	8% 6% 3 5% 5% 3 6% 7% 7% 12% 36%	1848
	11th to 20th	Night	10% 5% 2 6% 6% 4 5% 6% 6% 9% 40%	1980
	21st to end	Night	8% 4 2 5% 6% 3 5% 5% 6% 7% 48%	1980
October	1st to 10th	Night	7% 4 2 4 3 2 5% 4 6% 8% 54%	1980
	11th to 20th	Night	9% 5% 2 3 2 2 3 4 5% 6% 60%	1980
	21st to end	Night	11% 5% 2 4 4 2 4 3 4 6% 56%	2366
November	1st to 10th	Night	8% 5% 2 3 3 2 3 3 4 7% 60%	2406
	11th to 20th	Night	11% 5% 2 3 3 2 4 4 5% 7% 55%	2470
	21st to end	Night	14% 5% 2 3 4 3 5% 4 5% 7% 49%	2470
December	1st to 10th	Night	15% 6% 2 4 4 2 3 4 5% 7% 47%	2470
	11th to 20th	Night	16% 7% 3 5% 4 3 4 4 4 6% 46%	3042
	21st to end	Night	17% 8% 3 6% 6% 3 3 4 4 5% 40%	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	25% 38% 3 9% 19% 5%	1707
	11th to 20th	Day	24% 40% 4 12% 13% 7%	1810
	21st to end	Day	29% 36% 4 9% 13% 8%	1980
February	1st to 10th	Day	30% 35% 5% 11% 13% 7%	1800
	11th to 20th	Day	27% 36% 3 10% 15% 9%	1758
	21st to end	Day	31% 35% 3 12% 13% 6%	1480
March	1st to 10th	Day	25% 35% 3 12% 17% 8%	1800
	11th to 20th	Day	25% 36% 7% 14% 12% 7%	1908
	21st to end	Day	25% 35% 7% 14% 14% 5%	2259
April	1st to 10th	Day	27% 35% 6% 12% 12% 8%	2160
	11th to 20th	Day	26% 34% 4 12% 16% 8%	2134
	21st to end	Day	20% 35% 5% 15% 18% 6%	2160
May	1st to 10th	Day	24% 36% 6% 15% 15% 4	2222
	11th to 20th	Day	26% 37% 10% 14% 12% 2	2305
	21st to end	Day	25% 37% 8% 14% 15% 2	2531
June	1st to 10th	Day	31% 36% 11% 15% 6% 1	2340
	11th to 20th	Day	23% 37% 11% 18% 9% 2	2340
	21st to end	Day	30% 38% 12% 11% 8% 2	2340
July	1st to 10th	Day	36% 41% 14% 7% 3	2275
	11th to 20th	Day	35% 39% 13% 8% 4 1	2271
	21st to end	Day	32% 40% 15% 10% 3	2224
August	1st to 10th	Day	28% 38% 15% 13% 5%	2136
	11th to 20th	Day	34% 37% 14% 9% 6%	2125
	21st to end	Day	36% 37% 8% 10% 7% 2	2376
September	1st to 10th	Day	31% 36% 11% 10% 9% 2	2093
	11th to 20th	Day	34% 36% 8% 9% 9% 5%	1980
	21st to end	Day	25% 35% 5% 11% 16% 8%	1980
October	1st to 10th	Day	22% 36% 5% 10% 15% 12%	1980
	11th to 20th	Day	21% 35% 4 12% 18% 10%	1980
	21st to end	Day	21% 36% 2 9% 20% 12%	1984
November	1st to 10th	Day	13% 39% 4 13% 19% 13%	1672
	11th to 20th	Day	20% 38% 4 10% 18% 10%	1710
	21st to end	Day	25% 39% 5% 9% 14% 8%	1710
December	1st to 10th	Day	23% 39% 7% 11% 13% 6%	1710
	11th to 20th	Day	34% 31% 4 10% 17% 5%	2150
	21st to end	Day	33% 24% 3 16% 19% 6%	3124
January	1st to 10th	Night	24% 38% 4 10% 18% 6%	2455
	11th to 20th	Night	24% 40% 4 10% 15% 6%	2179
	21st to end	Night	30% 36% 4 7% 15% 7%	2376
February	1st to 10th	Night	28% 35% 4 12% 13% 8%	2160
	11th to 20th	Night	29% 35% 3 8% 14% 12%	2099
	21st to end	Night	30% 35% 3 12% 11% 9%	1776
March	1st to 10th	Night	23% 35% 4 12% 17% 10%	2160
	11th to 20th	Night	24% 35% 8% 13% 13% 7%	2052
	21st to end	Night	24% 36% 7% 13% 14% 7%	2109
April	1st to 10th	Night	24% 35% 8% 11% 14% 7%	1800
	11th to 20th	Night	23% 34% 7% 13% 16% 7%	1775
	21st to end	Night	17% 35% 7% 18% 17% 6%	1800
May	1st to 10th	Night	22% 36% 9% 15% 14% 4	1734
	11th to 20th	Night	23% 38% 13% 11% 14% 1	1593
	21st to end	Night	20% 37% 11% 16% 13% 3	1745
June	1st to 10th	Night	25% 38% 14% 16% 8%	1620
	11th to 20th	Night	20% 38% 15% 17% 8% 2	1620
	21st to end	Night	24% 37% 15% 15% 6% 2	1620
July	1st to 10th	Night	26% 43% 17% 9% 3 1	1575
	11th to 20th	Night	25% 44% 17% 10% 3 1	1566
	21st to end	Night	21% 43% 24% 10% 2	1848
August	1st to 10th	Night	20% 41% 20% 16% 2 1	1778
	11th to 20th	Night	27% 39% 18% 10% 5%	1776
	21st to end	Night	33% 41% 10% 9% 6% 2	1980
September	1st to 10th	Night	30% 38% 12% 10% 9% 2	1848
	11th to 20th	Night	28% 38% 10% 11% 9% 4	1980
	21st to end	Night	25% 36% 7% 9% 15% 8%	1980
October	1st to 10th	Night	20% 36% 5% 10% 18% 12%	1980
	11th to 20th	Night	19% 35% 5% 10% 21% 10%	1980
	21st to end	Night	20% 37% 3 10% 19% 12%	2366
November	1st to 10th	Night	13% 39% 3 12% 19% 15%	2406
	11th to 20th	Night	20% 38% 3 10% 19% 10%	2470
	21st to end	Night	24% 38% 4 11% 14% 8%	2470
December	1st to 10th	Night	22% 39% 6% 12% 16% 6%	2470
	11th to 20th	Night	29% 31% 5% 8% 21% 6%	3044
	21st to end	Night	34% 24% 4 14% 20% 4	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	21% 20% 39% 15% 4	270
	11th to 20th	Day	16% 17% 37% 21% 9% 1	243
	21st to end	Day	25% 21% 37% 14% 3	264
February	1st to 10th	Day	27% 23% 33% 15% 3	240
	11th to 20th	Day	25% 21% 35% 18% 2	240
	21st to end	Day	17% 26% 41% 14% 3	198
March	1st to 10th	Day	16% 23% 42% 14% 5%	240
	11th to 20th	Day	20% 17% 34% 20% 8% 1	348
	21st to end	Day	18% 16% 34% 23% 9% 1	462
April	1st to 10th	Day	22% 15% 28% 20% 12% 2	420
	11th to 20th	Day	18% 14% 31% 24% 12% 2	412
	21st to end	Day	10% 10% 31% 29% 16% 4	420
May	1st to 10th	Day	10% 10% 27% 26% 21% 7%	423
	11th to 20th	Day	6% 4 21% 34% 22% 13%	447
	21st to end	Day	11% 3 18% 31% 22% 16%	485
June	1st to 10th	Day	13% 2 12% 31% 26% 15%	450
	11th to 20th	Day	8% 4 10% 31% 26% 21%	450
	21st to end	Day	8% 3 12% 26% 27% 24%	450
July	1st to 10th	Day	8% 2 6% 24% 32% 28%	445
	11th to 20th	Day	7% 2 4 19% 34% 32%	444
	21st to end	Day	5% 1 8% 23% 37% 26%	488
August	1st to 10th	Day	9% 1 4 18% 36% 33%	446
	11th to 20th	Day	10% 6% 20% 36% 27%	439
	21st to end	Day	11% 2 8% 30% 26% 22%	495
September	1st to 10th	Day	8% 2 10% 28% 30% 22%	450
	11th to 20th	Day	14% 3 12% 30% 33% 8%	450
	21st to end	Day	10% 2 14% 31% 31% 12%	450
October	1st to 10th	Day	9% 4 28% 32% 21% 6%	450
	11th to 20th	Day	9% 6% 18% 34% 25% 8%	450
	21st to end	Day	14% 11% 23% 30% 19% 3	387
November	1st to 10th	Day	17% 7% 28% 33% 11% 4	270
	11th to 20th	Day	14% 16% 36% 28% 6% 1	270
	21st to end	Day	15% 14% 36% 22% 11% 1	270
December	1st to 10th	Day	21% 15% 33% 23% 7% 2	270
	11th to 20th	Day	26% 17% 33% 18% 6%	270
	21st to end	Day	28% 12% 31% 19% 9% 1	297
January	1st to 10th	Night	20% 15% 33% 26% 6%	760
	11th to 20th	Night	18% 15% 26% 31% 10%	727
	21st to end	Night	22% 14% 34% 25% 5%	792
February	1st to 10th	Night	19% 11% 35% 27% 6% 1	720
	11th to 20th	Night	23% 15% 30% 26% 7%	703
	21st to end	Night	20% 16% 36% 25% 3	592
March	1st to 10th	Night	16% 13% 34% 29% 8%	720
	11th to 20th	Night	17% 13% 32% 27% 11% 1	720
	21st to end	Night	13% 14% 31% 32% 9%	723
April	1st to 10th	Night	15% 10% 25% 38% 11%	540
	11th to 20th	Night	15% 9% 31% 27% 17% 1	533
	21st to end	Night	7% 7% 28% 39% 18% 1	540
May	1st to 10th	Night	9% 5% 25% 39% 21% 2	540
	11th to 20th	Night	9% 2 18% 35% 31% 5%	531
	21st to end	Night	9% 2 11% 36% 37% 5%	584
June	1st to 10th	Night	10% 1 10% 34% 37% 8%	540
	11th to 20th	Night	5% 2 8% 31% 42% 12%	540
	21st to end	Night	5% 1 10% 27% 43% 14%	540
July	1st to 10th	Night	5% 1 5% 23% 49% 18%	525
	11th to 20th	Night	7% 1 4 20% 41% 27%	522
	21st to end	Night	3 1 3 24% 51% 18%	591
August	1st to 10th	Night	6% 3 18% 47% 26%	537
	11th to 20th	Night	8% 1 4 21% 45% 22%	534
	21st to end	Night	11% 2 6% 23% 43% 16%	594
September	1st to 10th	Night	9% 3 7% 25% 41% 15%	588
	11th to 20th	Night	12% 2 14% 30% 35% 6%	720
	21st to end	Night	10% 2 15% 31% 36% 7%	720
October	1st to 10th	Night	9% 3 27% 33% 25% 3	720
	11th to 20th	Night	10% 6% 20% 33% 28% 3	720
	21st to end	Night	14% 6% 23% 32% 23% 2	792
November	1st to 10th	Night	12% 5% 26% 37% 18% 3	740
	11th to 20th	Night	15% 10% 27% 34% 14% 1	760
	21st to end	Night	17% 10% 26% 32% 14% 1	760
December	1st to 10th	Night	18% 11% 28% 29% 15%	760
	11th to 20th	Night	19% 10% 31% 28% 12%	760
	21st to end	Night	24% 11% 28% 27% 9%	836

Page generated at 2024-01-09 06:14:45. Version ac07

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