Hobbs State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Hobbs State Park clear sky chart from 2005-11-06 to 2024-02-25.

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% 3 5% 5% 3 4 4 5% 7% 44%	78385
	Night	12% 7% 3 5% 4 3 4 4 5% 7% 48%	80960
Transparency	Day	39% 5% 11% 24% 17% 4	78108
	Night	36% 5% 11% 24% 20% 4	80757
Seeing	Day	17% 11% 27% 25% 16% 4	14440
	Night	16% 12% 30% 28% 13% 1	24474

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% 13% 4 4 4 2 3 3 3 5% 44%	2847
	11th to 20th	Day	10% 8% 4 7% 5% 2 4 4 4 6% 47%	2850
	21st to end	Day	22% 9% 3 5% 3 2 3 3 3 5% 43%	3135
February	1st to 10th	Day	17% 11% 4 5% 5% 4 4 3 3 5% 39%	1710
	11th to 20th	Day	15% 9% 4 6% 4 2 4 4 4 6% 42%	1664
	21st to end	Day	17% 11% 4 5% 4 2 3 4 3 5% 41%	1653
March	1st to 10th	Day	14% 9% 3 5% 4 2 4 4 5% 6% 44%	1980
	11th to 20th	Day	19% 9% 3 6% 4 3 4 5% 4 4 39%	1980
	21st to end	Day	19% 9% 3 6% 6% 3 5% 4 4 6% 35%	2178
April	1st to 10th	Day	12% 7% 3 5% 5% 3 5% 4 5% 7% 44%	2092
	11th to 20th	Day	17% 7% 3 6% 5% 3 4 5% 4 6% 39%	2134
	21st to end	Day	18% 9% 4 6% 6% 3 4 4 3 5% 39%	2160
May	1st to 10th	Day	17% 6% 3 7% 6% 3 5% 4 6% 6% 38%	2321
	11th to 20th	Day	13% 7% 3 6% 6% 3 5% 5% 6% 7% 41%	2302
	21st to end	Day	10% 6% 3 6% 6% 4 6% 6% 7% 9% 37%	2531
June	1st to 10th	Day	7% 4 2 5% 6% 3 6% 6% 7% 10% 45%	2340
	11th to 20th	Day	6% 4 2 5% 5% 4 6% 6% 7% 9% 46%	2340
	21st to end	Day	4 2 2 4 4 4 6% 6% 5% 10% 53%	2340
July	1st to 10th	Day	9% 4 2 6% 6% 5% 6% 6% 8% 10% 38%	2340
	11th to 20th	Day	4 3 2 4 4 3 5% 6% 8% 11% 49%	2340
	21st to end	Day	7% 4 2 5% 6% 4 6% 5% 6% 11% 44%	2546
August	1st to 10th	Day	7% 5% 2 4 5% 4 5% 6% 8% 10% 44%	2328
	11th to 20th	Day	9% 4 2 5% 6% 4 5% 6% 7% 8% 45%	2261
	21st to end	Day	6% 4 2 5% 4 3 5% 5% 6% 9% 50%	2376
September	1st to 10th	Day	11% 5% 2 4 4 3 3 4 5% 6% 52%	2160
	11th to 20th	Day	11% 5% 3 5% 4 3 4 5% 5% 8% 47%	2034
	21st to end	Day	7% 4 2 4 4 3 4 4 5% 8% 56%	1942
October	1st to 10th	Day	10% 4 2 5% 4 2 3 4 4 7% 53%	1800
	11th to 20th	Day	13% 5% 2 4 3 2 2 3 4 6% 56%	1800
	21st to end	Day	18% 6% 3 4 4 2 3 3 3 4 49%	1980
November	1st to 10th	Day	12% 6% 2 3 3 3 3 3 3 7% 57%	1858
	11th to 20th	Day	12% 6% 3 4 4 2 3 5% 4 5% 50%	1867
	21st to end	Day	17% 8% 3 4 3 2 3 3 4 6% 47%	1559
December	1st to 10th	Day	14% 8% 3 5% 4 2 5% 5% 4 4 47%	1520
	11th to 20th	Day	13% 11% 4 6% 6% 3 4 3 4 4 42%	1982
	21st to end	Day	15% 18% 6% 5% 5% 3 3 4 4 5% 30%	3135
January	1st to 10th	Night	12% 10% 5% 7% 5% 3 4 4 5% 5% 40%	4108
	11th to 20th	Night	12% 7% 2 6% 5% 4 7% 4 3 5% 45%	4120
	21st to end	Night	22% 11% 4 4 3 2 2 2 3 5% 42%	4532
February	1st to 10th	Night	16% 10% 3 7% 4 2 4 3 4 7% 41%	2470
	11th to 20th	Night	15% 8% 3 6% 5% 2 3 3 3 5% 46%	2403
	21st to end	Night	15% 9% 3 5% 5% 2 3 3 4 5% 45%	1712
March	1st to 10th	Night	13% 8% 3 6% 4 3 3 4 5% 6% 45%	1980
	11th to 20th	Night	17% 10% 3 5% 4 2 5% 3 4 6% 41%	1980
	21st to end	Night	17% 10% 3 6% 4 3 5% 3 4 5% 41%	2178
April	1st to 10th	Night	12% 6% 2 4 4 3 4 4 5% 6% 51%	1868
	11th to 20th	Night	14% 6% 2 4 3 2 5% 4 5% 8% 47%	1775
	21st to end	Night	18% 6% 2 5% 4 3 4 4 5% 6% 44%	1800
May	1st to 10th	Night	12% 7% 2 4 4 3 4 4 5% 8% 46%	1636
	11th to 20th	Night	13% 6% 2 4 4 3 3 5% 6% 7% 48%	1593
	21st to end	Night	10% 5% 3 5% 5% 3 6% 4 7% 10% 43%	1745
June	1st to 10th	Night	5% 3 2 4 3 3 3 5% 6% 10% 56%	1620
	11th to 20th	Night	5% 2 1 3 3 2 5% 5% 6% 12% 55%	1620
	21st to end	Night	2 2 1 3 4 2 4 5% 6% 9% 63%	1620
July	1st to 10th	Night	4 3 2 4 5% 2 5% 6% 6% 12% 50%	1620
	11th to 20th	Night	4 1 2 3 3 2 4 5% 6% 10% 60%	1620
	21st to end	Night	4 3 2 5% 5% 3 5% 5% 6% 9% 53%	1772
August	1st to 10th	Night	4 3 1 4 5% 4 5% 6% 8% 12% 49%	1611
	11th to 20th	Night	6% 4 1 4 4 4 4 6% 6% 9% 52%	1637
	21st to end	Night	4 3 1 4 4 3 4 5% 6% 8% 56%	1980
September	1st to 10th	Night	7% 5% 2 4 3 2 4 4 5% 8% 57%	1800
	11th to 20th	Night	9% 4 2 5% 5% 3 3 4 4 7% 53%	1921
	21st to end	Night	7% 5% 2 4 4 3 4 4 5% 6% 58%	1998
October	1st to 10th	Night	6% 3 2 3 3 2 3 4 6% 8% 59%	2160
	11th to 20th	Night	14% 4 2 3 4 2 3 3 4 6% 55%	2160
	21st to end	Night	17% 6% 2 4 3 2 4 3 3 4 52%	2376
November	1st to 10th	Night	12% 5% 1 4 3 2 3 3 3 6% 60%	2220
	11th to 20th	Night	12% 6% 2 4 3 2 3 4 4 5% 55%	2308
	21st to end	Night	15% 7% 2 5% 4 2 3 3 4 6% 49%	2614
December	1st to 10th	Night	14% 9% 3 5% 4 2 3 3 4 6% 47%	2660
	11th to 20th	Night	15% 10% 4 6% 4 3 4 3 3 4 44%	3211
	21st to end	Night	17% 15% 6% 7% 5% 2 3 3 3 4 34%	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	43% 3 6% 26% 20% 2	2848
	11th to 20th	Day	36% 4 13% 25% 17% 4	2850
	21st to end	Day	47% 2 7% 21% 18% 5%	3135
February	1st to 10th	Day	49% 4 9% 21% 14% 4	1710
	11th to 20th	Day	45% 3 9% 23% 17% 3	1673
	21st to end	Day	47% 3 6% 19% 15% 9%	1653
March	1st to 10th	Day	42% 4 7% 19% 20% 8%	1980
	11th to 20th	Day	48% 4 8% 21% 14% 5%	1980
	21st to end	Day	50% 5% 11% 21% 12% 1	2178
April	1st to 10th	Day	39% 4 12% 25% 18% 2	2092
	11th to 20th	Day	46% 5% 11% 19% 16% 3	2134
	21st to end	Day	49% 5% 8% 22% 14% 2	2160
May	1st to 10th	Day	47% 5% 10% 22% 15% 1	2321
	11th to 20th	Day	42% 7% 13% 24% 13% 1	2306
	21st to end	Day	42% 8% 14% 24% 11% 1	2531
June	1st to 10th	Day	33% 8% 17% 28% 13% 1	2340
	11th to 20th	Day	32% 7% 15% 29% 15% 2	2340
	21st to end	Day	26% 7% 15% 30% 18% 4	2340
July	1st to 10th	Day	37% 8% 18% 22% 13% 1	2276
	11th to 20th	Day	27% 7% 16% 30% 18% 2	2271
	21st to end	Day	34% 8% 16% 31% 11% 1	2405
August	1st to 10th	Day	33% 8% 19% 27% 13% 1	2314
	11th to 20th	Day	35% 7% 13% 27% 18% 1	2261
	21st to end	Day	31% 6% 15% 25% 18% 5%	2376
September	1st to 10th	Day	33% 5% 11% 27% 17% 8%	2160
	11th to 20th	Day	35% 5% 11% 22% 24% 3	2034
	21st to end	Day	29% 5% 9% 26% 27% 4	1942
October	1st to 10th	Day	30% 6% 10% 25% 22% 6%	1800
	11th to 20th	Day	32% 3 7% 23% 27% 8%	1800
	21st to end	Day	41% 3 7% 26% 17% 7%	1980
November	1st to 10th	Day	30% 4 8% 28% 23% 8%	1858
	11th to 20th	Day	36% 3 7% 23% 22% 9%	1867
	21st to end	Day	40% 3 9% 19% 25% 4	1559
December	1st to 10th	Day	41% 3 9% 26% 18% 3	1520
	11th to 20th	Day	46% 4 5% 18% 24% 3	1979
	21st to end	Day	54% 5% 8% 17% 13% 2	3135
January	1st to 10th	Night	45% 4 8% 22% 19% 3	4108
	11th to 20th	Night	38% 4 14% 22% 20% 2	4120
	21st to end	Night	48% 2 9% 19% 19% 3	4532
February	1st to 10th	Night	45% 3 10% 22% 15% 4	2470
	11th to 20th	Night	42% 3 8% 26% 18% 4	2404
	21st to end	Night	43% 3 8% 19% 20% 7%	1712
March	1st to 10th	Night	41% 5% 6% 18% 21% 9%	1980
	11th to 20th	Night	46% 5% 9% 19% 18% 4	1980
	21st to end	Night	46% 5% 8% 24% 14% 2	2178
April	1st to 10th	Night	35% 4 11% 26% 20% 5%	1868
	11th to 20th	Night	35% 5% 10% 24% 21% 4	1775
	21st to end	Night	41% 5% 10% 25% 17% 2	1800
May	1st to 10th	Night	36% 6% 13% 25% 18% 2	1636
	11th to 20th	Night	34% 7% 17% 23% 17% 2	1594
	21st to end	Night	36% 7% 17% 27% 12% 1	1746
June	1st to 10th	Night	23% 7% 16% 33% 18% 3	1620
	11th to 20th	Night	21% 8% 16% 32% 20% 3	1620
	21st to end	Night	18% 6% 15% 32% 24% 6%	1620
July	1st to 10th	Night	25% 8% 19% 29% 18% 2	1575
	11th to 20th	Night	19% 6% 14% 32% 25% 3	1566
	21st to end	Night	25% 6% 15% 36% 18% 1	1673
August	1st to 10th	Night	25% 7% 17% 34% 16%	1601
	11th to 20th	Night	28% 7% 13% 26% 22% 3	1637
	21st to end	Night	24% 6% 14% 28% 24% 5%	1980
September	1st to 10th	Night	25% 5% 12% 31% 20% 8%	1800
	11th to 20th	Night	32% 5% 10% 22% 26% 5%	1921
	21st to end	Night	26% 4 9% 25% 30% 6%	1998
October	1st to 10th	Night	23% 5% 13% 26% 25% 8%	2160
	11th to 20th	Night	31% 4 6% 23% 27% 9%	2160
	21st to end	Night	37% 3 7% 23% 22% 8%	2376
November	1st to 10th	Night	29% 3 8% 26% 26% 9%	2220
	11th to 20th	Night	32% 4 8% 23% 26% 8%	2308
	21st to end	Night	39% 3 8% 21% 25% 5%	2614
December	1st to 10th	Night	40% 4 10% 22% 20% 3	2660
	11th to 20th	Night	45% 3 6% 21% 21% 4	3213
	21st to end	Night	53% 5% 9% 18% 12% 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	28% 19% 36% 14% 3	270
	11th to 20th	Day	27% 24% 37% 11% 1	270
	21st to end	Day	26% 20% 38% 12% 4	297
February	1st to 10th	Day	31% 24% 33% 10% 2	270
	11th to 20th	Day	27% 29% 30% 13% 1	270
	21st to end	Day	36% 25% 31% 7% 1	210
March	1st to 10th	Day	26% 27% 32% 13% 3	240
	11th to 20th	Day	33% 18% 34% 13% 2	240
	21st to end	Day	32% 23% 36% 7% 2	264
April	1st to 10th	Day	23% 25% 32% 12% 7% 1	352
	11th to 20th	Day	29% 16% 34% 16% 5%	412
	21st to end	Day	28% 18% 29% 20% 5%	420
May	1st to 10th	Day	19% 15% 40% 19% 6%	584
	11th to 20th	Day	18% 9% 34% 24% 13% 1	625
	21st to end	Day	12% 11% 36% 22% 15% 4	679
June	1st to 10th	Day	11% 3 21% 35% 23% 7%	630
	11th to 20th	Day	7% 4 27% 36% 20% 5%	630
	21st to end	Day	3 4 32% 34% 22% 5%	630
July	1st to 10th	Day	9% 4 15% 33% 30% 10%	621
	11th to 20th	Day	5% 2 16% 38% 30% 9%	618
	21st to end	Day	8% 2 10% 35% 35% 10%	684
August	1st to 10th	Day	10% 3 12% 41% 30% 4	626
	11th to 20th	Day	14% 1 10% 33% 32% 9%	575
	21st to end	Day	9% 2 11% 34% 31% 13%	495
September	1st to 10th	Day	12% 3 12% 34% 31% 8%	450
	11th to 20th	Day	6% 1 18% 42% 24% 8%	324
	21st to end	Day	11% 4 25% 30% 24% 6%	270
October	1st to 10th	Day	12% 9% 31% 29% 14% 5%	270
	11th to 20th	Day	15% 12% 46% 17% 9%	270
	21st to end	Day	31% 16% 33% 16% 5%	297
November	1st to 10th	Day	17% 15% 41% 16% 9% 2	270
	11th to 20th	Day	17% 18% 40% 14% 10% 1	270
	21st to end	Day	28% 17% 30% 21% 3 1	270
December	1st to 10th	Day	21% 20% 34% 16% 7% 1	270
	11th to 20th	Day	23% 21% 34% 15% 6% 1	270
	21st to end	Day	25% 25% 36% 12% 2	297
January	1st to 10th	Night	20% 19% 35% 23% 4	950
	11th to 20th	Night	21% 23% 35% 18% 3	950
	21st to end	Night	19% 21% 34% 21% 4	1045
February	1st to 10th	Night	22% 18% 37% 19% 3	950
	11th to 20th	Night	21% 21% 39% 17% 2	929
	21st to end	Night	23% 22% 36% 18% 1	492
March	1st to 10th	Night	23% 15% 35% 24% 3	540
	11th to 20th	Night	24% 16% 34% 23% 4	540
	21st to end	Night	22% 16% 39% 18% 6%	594
April	1st to 10th	Night	17% 19% 36% 24% 4	540
	11th to 20th	Night	17% 15% 36% 24% 7%	533
	21st to end	Night	20% 15% 38% 19% 7%	540
May	1st to 10th	Night	15% 7% 39% 29% 9%	540
	11th to 20th	Night	16% 8% 29% 32% 13% 1	531
	21st to end	Night	13% 5% 29% 31% 17% 4	584
June	1st to 10th	Night	7% 4 16% 40% 32% 1	540
	11th to 20th	Night	5% 2 27% 42% 22% 2	540
	21st to end	Night	3 2 22% 45% 25% 3	540
July	1st to 10th	Night	6% 2 13% 37% 39% 4	525
	11th to 20th	Night	4 1 11% 45% 33% 6%	522
	21st to end	Night	6% 2 7% 42% 36% 7%	591
August	1st to 10th	Night	5% 1 12% 42% 37% 4	537
	11th to 20th	Night	8% 1 12% 43% 32% 4	534
	21st to end	Night	6% 1 13% 40% 34% 5%	594
September	1st to 10th	Night	10% 2 13% 42% 31% 3	540
	11th to 20th	Night	11% 2 14% 39% 29% 5%	540
	21st to end	Night	9% 4 19% 38% 26% 4	558
October	1st to 10th	Night	7% 5% 27% 34% 23% 4	720
	11th to 20th	Night	15% 9% 36% 28% 11%	720
	21st to end	Night	22% 11% 32% 23% 11% 1	792
November	1st to 10th	Night	14% 11% 36% 27% 11% 1	740
	11th to 20th	Night	17% 14% 34% 29% 7%	788
	21st to end	Night	22% 15% 33% 23% 7%	950
December	1st to 10th	Night	20% 14% 38% 22% 5%	950
	11th to 20th	Night	24% 15% 31% 25% 4	950
	21st to end	Night	22% 19% 35% 20% 4	1045

Page generated at 2024-02-22 05:05:46. Version ac07

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