Pine Mountain State Resort Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Pine Mountain State Resort Park 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	14% 9% 3 7% 6% 3 5% 5% 6% 8% 35%	78640
	Night	14% 9% 4 6% 5% 3 4 4 5% 7% 38%	80340
Transparency	Day	47% 7% 11% 20% 14% 2	78363
	Night	45% 7% 10% 20% 16% 3	80136
Seeing	Day	21% 12% 23% 22% 15% 7%	13809
	Night	19% 10% 19% 30% 19% 3	23957

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% 14% 6% 12% 5% 3 3 4 5% 7% 25%	2836
	11th to 20th	Day	17% 13% 7% 12% 5% 6% 4 4 4 3 25%	2840
	21st to end	Day	21% 15% 7% 6% 4 3 4 3 3 5% 28%	3124
February	1st to 10th	Day	16% 12% 5% 8% 6% 3 4 4 5% 6% 31%	1830
	11th to 20th	Day	21% 10% 5% 8% 6% 3 5% 4 4 6% 29%	1748
	21st to end	Day	23% 12% 4 8% 6% 2 3 3 3 5% 31%	1480
March	1st to 10th	Day	16% 12% 4 5% 5% 3 3 4 4 7% 38%	1861
	11th to 20th	Day	20% 10% 4 7% 5% 3 4 5% 6% 6% 30%	1980
	21st to end	Day	18% 11% 3 7% 6% 3 5% 3 5% 7% 33%	2178
April	1st to 10th	Day	12% 7% 3 6% 6% 3 4 5% 6% 7% 40%	2031
	11th to 20th	Day	16% 8% 3 6% 4 2 4 5% 5% 7% 41%	2177
	21st to end	Day	16% 7% 3 6% 5% 4 5% 5% 6% 6% 37%	2340
May	1st to 10th	Day	17% 7% 3 6% 6% 3 5% 6% 6% 8% 34%	2340
	11th to 20th	Day	16% 7% 3 8% 6% 4 5% 4 6% 7% 33%	2301
	21st to end	Day	11% 6% 2 6% 6% 4 5% 6% 7% 10% 35%	2531
June	1st to 10th	Day	11% 5% 3 6% 7% 5% 6% 6% 8% 9% 35%	2340
	11th to 20th	Day	7% 5% 3 6% 6% 4 7% 6% 6% 10% 38%	2340
	21st to end	Day	9% 4 3 5% 6% 4 6% 6% 8% 11% 36%	2340
July	1st to 10th	Day	11% 6% 3 7% 8% 6% 7% 7% 6% 9% 30%	2340
	11th to 20th	Day	10% 6% 2 8% 7% 4 6% 7% 7% 11% 32%	2340
	21st to end	Day	13% 6% 3 6% 7% 4 7% 7% 6% 9% 30%	2547
August	1st to 10th	Day	11% 6% 3 6% 7% 4 6% 7% 8% 11% 31%	2327
	11th to 20th	Day	12% 6% 3 6% 7% 5% 6% 7% 8% 9% 32%	2303
	21st to end	Day	9% 5% 3 7% 6% 4 5% 7% 8% 9% 37%	2381
September	1st to 10th	Day	13% 6% 3 6% 6% 4 6% 5% 5% 7% 39%	1990
	11th to 20th	Day	14% 6% 3 4 5% 4 5% 4 6% 8% 41%	1980
	21st to end	Day	15% 7% 2 5% 4 2 3 5% 6% 6% 45%	1980
October	1st to 10th	Day	11% 5% 2 5% 5% 3 4 4 4 7% 51%	1980
	11th to 20th	Day	15% 7% 2 5% 4 2 4 3 5% 7% 48%	1818
	21st to end	Day	18% 8% 3 4 4 2 4 3 4 6% 44%	1958
November	1st to 10th	Day	10% 6% 2 5% 4 3 4 4 5% 6% 51%	1672
	11th to 20th	Day	13% 8% 3 5% 4 2 4 5% 5% 7% 44%	1710
	21st to end	Day	15% 10% 4 5% 4 2 4 4 4 7% 42%	1710
December	1st to 10th	Day	20% 12% 5% 7% 6% 3 4 4 4 6% 31%	1710
	11th to 20th	Day	15% 14% 3 7% 5% 2 4 4 6% 7% 32%	2153
	21st to end	Day	14% 17% 4 6% 5% 3 5% 5% 5% 7% 26%	3124
January	1st to 10th	Night	16% 18% 8% 8% 7% 3 4 3 3 4 26%	4109
	11th to 20th	Night	21% 12% 5% 7% 7% 3 4 3 3 4 31%	4120
	21st to end	Night	21% 14% 5% 6% 5% 3 4 3 4 5% 31%	4532
February	1st to 10th	Night	17% 10% 4 8% 6% 3 4 5% 5% 7% 30%	2332
	11th to 20th	Night	22% 10% 5% 7% 6% 3 4 4 4 5% 30%	2098
	21st to end	Night	21% 13% 5% 8% 6% 3 4 4 4 4 27%	1776
March	1st to 10th	Night	17% 10% 4 6% 5% 2 4 4 5% 5% 38%	2098
	11th to 20th	Night	17% 11% 4 6% 5% 3 5% 4 5% 6% 34%	1980
	21st to end	Night	14% 11% 4 7% 5% 3 5% 5% 5% 6% 35%	2178
April	1st to 10th	Night	12% 7% 3 6% 5% 3 4 4 5% 7% 44%	1944
	11th to 20th	Night	12% 8% 2 5% 5% 3 4 5% 6% 7% 43%	1730
	21st to end	Night	14% 7% 3 5% 6% 2 4 5% 6% 7% 41%	1620
May	1st to 10th	Night	15% 6% 2 6% 5% 3 6% 4 6% 8% 38%	1620
	11th to 20th	Night	15% 7% 3 6% 5% 3 5% 5% 5% 7% 37%	1592
	21st to end	Night	7% 5% 2 6% 7% 4 6% 6% 7% 10% 39%	1744
June	1st to 10th	Night	7% 6% 2 5% 5% 4 5% 6% 7% 11% 40%	1620
	11th to 20th	Night	5% 3 3 4 5% 4 5% 6% 8% 10% 46%	1620
	21st to end	Night	8% 5% 2 6% 6% 4 7% 5% 6% 12% 38%	1620
July	1st to 10th	Night	11% 6% 2 4 6% 3 6% 7% 8% 11% 36%	1620
	11th to 20th	Night	8% 5% 2 5% 5% 4 6% 4 6% 13% 41%	1620
	21st to end	Night	8% 4 3 6% 5% 5% 6% 8% 8% 11% 37%	1771
August	1st to 10th	Night	8% 5% 2 6% 5% 3 6% 6% 7% 11% 41%	1611
	11th to 20th	Night	9% 5% 2 5% 6% 3 5% 7% 7% 10% 42%	1598
	21st to end	Night	9% 4 2 4 4 4 5% 6% 8% 10% 45%	1970
September	1st to 10th	Night	10% 6% 2 4 5% 3 3 5% 6% 9% 46%	1952
	11th to 20th	Night	12% 6% 3 5% 4 4 5% 4 5% 7% 46%	1980
	21st to end	Night	12% 5% 2 5% 4 3 3 3 4 6% 51%	1980
October	1st to 10th	Night	11% 7% 1 5% 3 2 3 3 4 7% 54%	1980
	11th to 20th	Night	16% 6% 2 4 4 3 4 4 4 6% 47%	2140
	21st to end	Night	15% 7% 2 5% 3 2 3 4 5% 6% 47%	2395
November	1st to 10th	Night	12% 6% 3 5% 3 2 4 3 4 6% 51%	2406
	11th to 20th	Night	14% 8% 3 6% 3 2 4 3 4 8% 45%	2470
	21st to end	Night	15% 9% 3 6% 4 2 3 4 4 6% 43%	2470
December	1st to 10th	Night	19% 12% 5% 7% 5% 3 5% 4 4 6% 29%	2470
	11th to 20th	Night	16% 13% 5% 10% 5% 2 4 4 4 6% 33%	3042
	21st to end	Night	16% 14% 5% 8% 7% 4 6% 6% 6% 6% 22%	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	58% 5% 6% 18% 11% 2	2837
	11th to 20th	Day	63% 5% 6% 14% 11% 1	2840
	21st to end	Day	59% 5% 6% 20% 10% 1	3124
February	1st to 10th	Day	54% 5% 7% 17% 15% 2	1830
	11th to 20th	Day	58% 4 7% 19% 9% 2	1758
	21st to end	Day	57% 4 8% 13% 14% 4	1480
March	1st to 10th	Day	47% 4 7% 21% 17% 3	1861
	11th to 20th	Day	54% 6% 9% 16% 12% 3	1980
	21st to end	Day	50% 6% 10% 22% 11% 1	2178
April	1st to 10th	Day	42% 6% 11% 23% 15% 3	2031
	11th to 20th	Day	43% 5% 9% 18% 21% 4	2177
	21st to end	Day	46% 7% 10% 23% 12% 2	2340
May	1st to 10th	Day	46% 8% 11% 22% 10% 2	2340
	11th to 20th	Day	50% 7% 12% 21% 10% 1	2305
	21st to end	Day	41% 9% 16% 21% 11% 2	2531
June	1st to 10th	Day	42% 9% 13% 21% 14% 1	2340
	11th to 20th	Day	39% 10% 14% 21% 15% 2	2340
	21st to end	Day	39% 10% 13% 20% 15% 3	2340
July	1st to 10th	Day	47% 10% 13% 16% 11% 2	2275
	11th to 20th	Day	42% 10% 17% 16% 13% 3	2271
	21st to end	Day	46% 9% 14% 19% 10% 1	2405
August	1st to 10th	Day	43% 11% 16% 19% 10% 1	2314
	11th to 20th	Day	45% 9% 14% 18% 13% 1	2303
	21st to end	Day	40% 10% 14% 20% 14% 2	2381
September	1st to 10th	Day	42% 8% 12% 19% 14% 5%	1990
	11th to 20th	Day	41% 7% 9% 24% 17% 2	1980
	21st to end	Day	37% 7% 9% 22% 21% 3	1980
October	1st to 10th	Day	34% 5% 12% 21% 24% 4	1980
	11th to 20th	Day	37% 5% 9% 22% 24% 4	1818
	21st to end	Day	41% 3 8% 25% 19% 4	1958
November	1st to 10th	Day	33% 5% 8% 23% 26% 4	1672
	11th to 20th	Day	40% 5% 6% 22% 21% 6%	1710
	21st to end	Day	44% 4 9% 21% 20% 3	1710
December	1st to 10th	Day	56% 5% 7% 20% 10% 2	1710
	11th to 20th	Day	50% 6% 10% 17% 14% 2	2150
	21st to end	Day	55% 5% 10% 21% 9% 1	3124
January	1st to 10th	Night	61% 5% 6% 14% 12% 2	4109
	11th to 20th	Night	57% 5% 5% 14% 16% 3	4120
	21st to end	Night	56% 5% 7% 16% 15% 1	4532
February	1st to 10th	Night	54% 5% 10% 18% 12% 1	2332
	11th to 20th	Night	57% 4 7% 17% 11% 3	2099
	21st to end	Night	60% 5% 7% 13% 12% 4	1776
March	1st to 10th	Night	48% 4 8% 15% 21% 4	2098
	11th to 20th	Night	51% 6% 9% 21% 11% 2	1980
	21st to end	Night	49% 7% 10% 21% 12% 2	2178
April	1st to 10th	Night	39% 5% 11% 24% 18% 3	1944
	11th to 20th	Night	40% 6% 10% 19% 18% 6%	1730
	21st to end	Night	39% 8% 13% 26% 12% 2	1620
May	1st to 10th	Night	42% 8% 13% 24% 11% 3	1620
	11th to 20th	Night	45% 9% 12% 22% 10% 1	1593
	21st to end	Night	38% 10% 15% 24% 12% 2	1745
June	1st to 10th	Night	35% 10% 16% 22% 14% 3	1620
	11th to 20th	Night	29% 12% 18% 23% 16% 2	1620
	21st to end	Night	38% 11% 13% 20% 14% 4	1620
July	1st to 10th	Night	38% 11% 17% 19% 13% 2	1575
	11th to 20th	Night	34% 9% 19% 19% 15% 5%	1566
	21st to end	Night	36% 12% 17% 23% 12% 1	1672
August	1st to 10th	Night	34% 9% 21% 22% 12% 1	1600
	11th to 20th	Night	35% 10% 17% 21% 15% 1	1598
	21st to end	Night	31% 9% 16% 24% 17% 2	1970
September	1st to 10th	Night	34% 8% 14% 21% 17% 6%	1952
	11th to 20th	Night	38% 7% 11% 21% 20% 2	1980
	21st to end	Night	35% 4 10% 24% 24% 4	1980
October	1st to 10th	Night	31% 5% 9% 22% 26% 6%	1980
	11th to 20th	Night	37% 6% 8% 20% 24% 4	2140
	21st to end	Night	38% 4 6% 23% 22% 6%	2395
November	1st to 10th	Night	35% 5% 7% 21% 24% 7%	2406
	11th to 20th	Night	39% 4 6% 21% 22% 7%	2470
	21st to end	Night	43% 4 6% 25% 19% 3	2470
December	1st to 10th	Night	58% 6% 7% 17% 10% 2	2470
	11th to 20th	Night	54% 3 7% 19% 15% 2	3044
	21st to end	Night	57% 10% 9% 14% 10%	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	29% 24% 32% 11% 3 1	270
	11th to 20th	Day	40% 24% 23% 11% 2	270
	21st to end	Day	29% 25% 35% 8% 3	297
February	1st to 10th	Day	30% 23% 31% 13% 3	267
	11th to 20th	Day	46% 22% 27% 5% 1	240
	21st to end	Day	42% 25% 26% 7% 1 1	198
March	1st to 10th	Day	29% 24% 27% 17% 2	301
	11th to 20th	Day	30% 22% 27% 17% 4	420
	21st to end	Day	29% 20% 26% 17% 7% 1	462
April	1st to 10th	Day	28% 16% 23% 22% 10% 1	420
	11th to 20th	Day	24% 17% 26% 19% 12% 1	412
	21st to end	Day	26% 13% 28% 19% 12% 2	420
May	1st to 10th	Day	22% 17% 29% 18% 10% 4	423
	11th to 20th	Day	17% 11% 28% 24% 13% 6%	447
	21st to end	Day	18% 7% 18% 26% 18% 13%	485
June	1st to 10th	Day	14% 6% 21% 24% 23% 12%	450
	11th to 20th	Day	8% 7% 18% 30% 23% 13%	450
	21st to end	Day	12% 7% 23% 28% 21% 10%	450
July	1st to 10th	Day	14% 4 13% 25% 22% 20%	445
	11th to 20th	Day	9% 5% 18% 26% 24% 17%	444
	21st to end	Day	14% 4 14% 32% 24% 12%	488
August	1st to 10th	Day	15% 4 17% 24% 28% 12%	446
	11th to 20th	Day	15% 6% 15% 28% 25% 11%	439
	21st to end	Day	11% 5% 11% 28% 29% 16%	495
September	1st to 10th	Day	12% 5% 13% 22% 32% 15%	450
	11th to 20th	Day	16% 3 10% 28% 31% 12%	450
	21st to end	Day	17% 7% 18% 28% 20% 10%	450
October	1st to 10th	Day	14% 7% 21% 28% 22% 8%	450
	11th to 20th	Day	18% 14% 25% 25% 15% 3	450
	21st to end	Day	24% 12% 26% 26% 11% 2	473
November	1st to 10th	Day	17% 14% 33% 23% 11% 2	270
	11th to 20th	Day	26% 13% 35% 20% 6% 1	270
	21st to end	Day	23% 17% 34% 18% 8%	270
December	1st to 10th	Day	30% 23% 27% 14% 6%	270
	11th to 20th	Day	27% 16% 32% 20% 3 1	270
	21st to end	Day	29% 21% 33% 13% 4	297
January	1st to 10th	Night	28% 17% 23% 27% 4	760
	11th to 20th	Night	31% 18% 24% 23% 4	760
	21st to end	Night	24% 17% 28% 27% 3	836
February	1st to 10th	Night	25% 15% 28% 29% 3	759
	11th to 20th	Night	33% 17% 29% 19% 2	703
	21st to end	Night	31% 19% 26% 22% 2	592
March	1st to 10th	Night	26% 15% 26% 28% 5%	720
	11th to 20th	Night	27% 15% 24% 26% 8% 1	720
	21st to end	Night	21% 15% 27% 29% 8%	792
April	1st to 10th	Night	20% 14% 24% 29% 13%	684
	11th to 20th	Night	18% 11% 26% 30% 13% 2	533
	21st to end	Night	17% 8% 29% 33% 13% 1	540
May	1st to 10th	Night	19% 8% 20% 35% 16% 2	540
	11th to 20th	Night	18% 5% 19% 34% 21% 3	531
	21st to end	Night	8% 3 15% 34% 32% 8%	584
June	1st to 10th	Night	9% 4 13% 36% 33% 6%	540
	11th to 20th	Night	5% 3 12% 36% 34% 9%	540
	21st to end	Night	10% 2 12% 38% 33% 5%	540
July	1st to 10th	Night	14% 2 7% 28% 40% 9%	525
	11th to 20th	Night	9% 3 9% 25% 45% 10%	522
	21st to end	Night	8% 4 8% 29% 42% 9%	591
August	1st to 10th	Night	10% 3 7% 28% 45% 7%	537
	11th to 20th	Night	12% 2 7% 32% 40% 7%	534
	21st to end	Night	11% 2 7% 29% 42% 10%	594
September	1st to 10th	Night	13% 3 8% 28% 41% 7%	692
	11th to 20th	Night	15% 2 10% 30% 36% 7%	720
	21st to end	Night	13% 4 18% 30% 32% 4	720
October	1st to 10th	Night	14% 6% 17% 27% 30% 6%	720
	11th to 20th	Night	21% 8% 19% 33% 17% 2	720
	21st to end	Night	20% 9% 21% 32% 16% 2	792
November	1st to 10th	Night	16% 8% 18% 37% 17% 3	740
	11th to 20th	Night	20% 14% 20% 33% 11% 1	760
	21st to end	Night	22% 12% 21% 34% 11%	760
December	1st to 10th	Night	29% 14% 21% 29% 7%	760
	11th to 20th	Night	24% 13% 26% 29% 8% 1	760
	21st to end	Night	29% 16% 21% 30% 4	836

Page generated at 2024-02-07 06:11:58. Version ac07

Copyright 2024 Attilla Danko