Lake Hudson State Recreational Area
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lake Hudson State Recreational Area clear sky chart from 2005-11-06 to 2024-11-04.

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% 9% 3 8% 5% 5% 5% 4 6% 7% 34%	101166
	Night	15% 10% 3 8% 5% 4 4 4 5% 7% 35%	97856
Transparency	Day	45% 8% 13% 21% 12% 1	104781
	Night	45% 8% 12% 21% 13% 1	102369
Seeing	Day	16% 11% 29% 24% 14% 6%	15656
	Night	18% 9% 30% 28% 13% 1	25478

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	17% 15% 6% 11% 6% 6% 4 5% 5% 6% 20%	2527
	11th to 20th	Day	15% 17% 6% 13% 7% 5% 8% 5% 6% 5% 13%	2530
	21st to end	Day	24% 20% 7% 13% 6% 5% 3 2 3 3 14%	3007
February	1st to 10th	Day	14% 14% 5% 9% 8% 7% 6% 4 6% 6% 21%	1721
	11th to 20th	Day	15% 11% 4 10% 8% 7% 5% 4 5% 6% 26%	1848
	21st to end	Day	16% 14% 5% 10% 5% 4 4 3 6% 6% 27%	1570
March	1st to 10th	Day	17% 14% 4 10% 5% 5% 5% 3 4 5% 26%	3140
	11th to 20th	Day	12% 10% 3 9% 6% 5% 5% 4 5% 8% 33%	3480
	21st to end	Day	20% 13% 5% 8% 5% 4 5% 3 5% 6% 26%	3815
April	1st to 10th	Day	16% 12% 3 8% 6% 5% 6% 4 6% 7% 30%	2257
	11th to 20th	Day	17% 8% 4 7% 5% 4 6% 4 5% 7% 35%	2357
	21st to end	Day	18% 10% 3 8% 4 4 4 3 6% 8% 34%	2470
May	1st to 10th	Day	18% 8% 3 7% 5% 5% 5% 4 6% 7% 34%	4082
	11th to 20th	Day	16% 8% 2 7% 5% 5% 5% 4 7% 8% 33%	4081
	21st to end	Day	9% 6% 2 6% 5% 4 5% 4 6% 8% 44%	4506
June	1st to 10th	Day	9% 6% 2 7% 5% 4 6% 5% 7% 8% 41%	2660
	11th to 20th	Day	10% 5% 2 6% 4 4 5% 5% 7% 9% 43%	2660
	21st to end	Day	9% 6% 2 6% 6% 5% 5% 5% 8% 8% 40%	2660
July	1st to 10th	Day	11% 5% 2 7% 5% 5% 5% 4 7% 10% 39%	4440
	11th to 20th	Day	6% 5% 2 5% 4 4 5% 5% 7% 11% 48%	4440
	21st to end	Day	6% 5% 2 6% 5% 6% 6% 5% 8% 9% 40%	4593
August	1st to 10th	Day	11% 5% 2 5% 4 4 5% 4 6% 8% 45%	4104
	11th to 20th	Day	8% 6% 2 7% 5% 4 6% 4 7% 9% 41%	4044
	21st to end	Day	8% 5% 2 7% 5% 5% 5% 4 6% 10% 44%	4352
September	1st to 10th	Day	12% 5% 2 7% 5% 5% 4 4 7% 8% 43%	2179
	11th to 20th	Day	9% 4 2 4 4 4 5% 5% 7% 8% 47%	2090
	21st to end	Day	13% 8% 2 7% 4 5% 5% 4 5% 8% 40%	2090
October	1st to 10th	Day	12% 6% 2 7% 4 4 4 3 5% 8% 44%	2082
	11th to 20th	Day	17% 8% 3 7% 5% 4 5% 3 6% 5% 36%	1900
	21st to end	Day	17% 10% 3 7% 5% 6% 4 4 5% 7% 30%	1898
November	1st to 10th	Day	12% 7% 3 7% 4 5% 4 4 6% 7% 41%	1699
	11th to 20th	Day	15% 15% 4 8% 5% 4 5% 4 5% 6% 30%	1710
	21st to end	Day	19% 13% 5% 7% 6% 4 4 4 5% 7% 26%	1710
December	1st to 10th	Day	15% 16% 6% 12% 7% 5% 4 4 5% 5% 21%	1710
	11th to 20th	Day	15% 13% 7% 12% 6% 5% 5% 5% 5% 6% 21%	1971
	21st to end	Day	23% 21% 7% 12% 6% 4 4 3 4 5% 11%	2783
January	1st to 10th	Night	16% 17% 7% 10% 5% 5% 4 4 4 6% 23%	4428
	11th to 20th	Night	15% 18% 7% 13% 7% 5% 5% 5% 5% 6% 15%	4440
	21st to end	Night	24% 17% 6% 11% 6% 5% 4 3 4 4 15%	4651
February	1st to 10th	Night	16% 15% 4 9% 8% 5% 4 4 6% 6% 24%	2456
	11th to 20th	Night	14% 12% 5% 11% 5% 6% 5% 4 5% 6% 28%	2218
	21st to end	Night	20% 11% 4 9% 6% 5% 5% 3 5% 5% 29%	1884
March	1st to 10th	Night	16% 12% 4 7% 5% 4 3 3 5% 7% 35%	3712
	11th to 20th	Night	10% 7% 2 6% 5% 4 4 4 6% 7% 46%	3480
	21st to end	Night	17% 10% 3 9% 6% 4 4 3 5% 6% 34%	3817
April	1st to 10th	Night	15% 9% 4 7% 5% 4 4 3 5% 8% 37%	1938
	11th to 20th	Night	19% 7% 2 7% 4 4 5% 3 5% 6% 38%	1770
	21st to end	Night	16% 9% 3 5% 4 4 4 4 6% 6% 38%	1710
May	1st to 10th	Night	16% 8% 3 7% 6% 5% 5% 4 6% 8% 32%	2813
	11th to 20th	Night	18% 7% 3 7% 4 4 4 3 5% 6% 39%	2812
	21st to end	Night	11% 5% 2 6% 4 4 4 4 6% 9% 44%	3033
June	1st to 10th	Night	10% 5% 1 5% 4 4 3 4 6% 9% 48%	1520
	11th to 20th	Night	9% 6% 2 6% 4 5% 5% 4 7% 8% 43%	1520
	21st to end	Night	8% 4 2 6% 4 4 5% 4 7% 10% 46%	1520
July	1st to 10th	Night	8% 3 2 6% 4 4 4 4 6% 10% 49%	2530
	11th to 20th	Night	7% 5% 1 4 4 4 4 4 6% 9% 54%	2530
	21st to end	Night	6% 4 2 6% 4 4 6% 5% 7% 9% 46%	2960
August	1st to 10th	Night	11% 6% 2 6% 4 4 4 3 5% 9% 46%	2825
	11th to 20th	Night	8% 5% 2 5% 4 4 5% 4 7% 9% 49%	2785
	21st to end	Night	8% 5% 2 7% 4 5% 5% 4 5% 7% 48%	3301
September	1st to 10th	Night	10% 5% 2 5% 4 4 5% 3 5% 6% 51%	1981
	11th to 20th	Night	8% 5% 2 5% 4 3 4 3 5% 7% 56%	2090
	21st to end	Night	14% 7% 2 6% 4 4 3 4 5% 6% 45%	2090
October	1st to 10th	Night	12% 6% 3 6% 4 3 3 4 5% 7% 48%	2096
	11th to 20th	Night	17% 8% 2 7% 5% 5% 4 3 5% 6% 37%	2280
	21st to end	Night	18% 9% 3 7% 4 4 4 4 5% 6% 36%	2698
November	1st to 10th	Night	13% 9% 2 6% 4 4 4 4 5% 6% 43%	2452
	11th to 20th	Night	16% 10% 3 7% 5% 4 5% 5% 6% 7% 32%	2470
	21st to end	Night	18% 11% 5% 9% 5% 5% 4 4 5% 7% 28%	2470
December	1st to 10th	Night	17% 14% 4 9% 6% 5% 5% 4 6% 6% 23%	2470
	11th to 20th	Night	16% 13% 5% 11% 6% 5% 5% 4 5% 6% 25%	3222
	21st to end	Night	27% 18% 7% 10% 5% 5% 4 3 4 5% 13%	4884

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	63% 11% 10% 12% 4	2528
	11th to 20th	Day	68% 8% 11% 9% 4	2530
	21st to end	Day	77% 4 8% 7% 3 1	3007
February	1st to 10th	Day	61% 8% 10% 13% 7% 1	1721
	11th to 20th	Day	57% 8% 10% 16% 8% 1	1858
	21st to end	Day	56% 6% 13% 16% 6% 2	1570
March	1st to 10th	Day	58% 8% 10% 18% 6%	3140
	11th to 20th	Day	46% 8% 16% 21% 8% 1	3480
	21st to end	Day	57% 8% 13% 16% 6% 1	3815
April	1st to 10th	Day	51% 8% 12% 18% 11%	2257
	11th to 20th	Day	47% 7% 12% 21% 12% 2	2357
	21st to end	Day	47% 7% 13% 18% 13% 2	2470
May	1st to 10th	Day	45% 10% 13% 21% 10% 1	4120
	11th to 20th	Day	42% 11% 16% 21% 9% 1	4085
	21st to end	Day	35% 10% 11% 19% 21% 4	4519
June	1st to 10th	Day	38% 8% 13% 25% 14% 2	2660
	11th to 20th	Day	35% 9% 14% 22% 17% 3	2660
	21st to end	Day	38% 10% 14% 20% 15% 3	2660
July	1st to 10th	Day	38% 7% 16% 21% 15% 3	4371
	11th to 20th	Day	28% 8% 15% 31% 18% 1	4365
	21st to end	Day	35% 10% 14% 18% 20% 2	4447
August	1st to 10th	Day	34% 8% 16% 25% 16% 1	4091
	11th to 20th	Day	35% 10% 13% 27% 15% 1	4083
	21st to end	Day	33% 8% 13% 33% 11% 2	4351
September	1st to 10th	Day	37% 9% 14% 22% 16% 2	2179
	11th to 20th	Day	32% 7% 13% 27% 19% 1	2090
	21st to end	Day	41% 7% 13% 21% 17%	2090
October	1st to 10th	Day	28% 6% 12% 32% 21% 1	3459
	11th to 20th	Day	38% 5% 10% 26% 20%	3140
	21st to end	Day	42% 7% 12% 26% 11% 1	3098
November	1st to 10th	Day	41% 6% 13% 25% 15% 1	1699
	11th to 20th	Day	54% 6% 11% 18% 9% 2	1710
	21st to end	Day	58% 6% 13% 15% 7% 1	1710
December	1st to 10th	Day	64% 7% 11% 13% 5%	1710
	11th to 20th	Day	61% 8% 12% 14% 4	1968
	21st to end	Day	76% 6% 8% 6% 4	2783
January	1st to 10th	Night	61% 8% 11% 14% 6%	4428
	11th to 20th	Night	67% 7% 12% 10% 4	4440
	21st to end	Night	70% 8% 9% 8% 3	4651
February	1st to 10th	Night	60% 8% 12% 14% 5% 1	2456
	11th to 20th	Night	54% 7% 10% 20% 8% 1	2219
	21st to end	Night	55% 7% 12% 16% 9% 1	1884
March	1st to 10th	Night	48% 6% 13% 24% 8%	3712
	11th to 20th	Night	34% 9% 16% 22% 18% 2	3480
	21st to end	Night	48% 8% 14% 21% 8% 1	3817
April	1st to 10th	Night	45% 7% 11% 22% 14% 2	1938
	11th to 20th	Night	45% 7% 11% 18% 17% 2	1770
	21st to end	Night	44% 7% 11% 19% 15% 3	1710
May	1st to 10th	Night	47% 10% 12% 18% 13% 1	2840
	11th to 20th	Night	42% 9% 11% 25% 12% 1	2813
	21st to end	Night	32% 9% 16% 21% 20% 2	3041
June	1st to 10th	Night	31% 7% 14% 27% 19% 3	1520
	11th to 20th	Night	35% 10% 13% 24% 17% 3	1520
	21st to end	Night	31% 8% 16% 24% 18% 2	1520
July	1st to 10th	Night	30% 6% 13% 26% 18% 6%	2490
	11th to 20th	Night	25% 7% 17% 27% 21% 3	2482
	21st to end	Night	30% 9% 18% 18% 22% 3	2866
August	1st to 10th	Night	34% 8% 15% 26% 15% 1	2814
	11th to 20th	Night	29% 10% 14% 30% 16% 2	2812
	21st to end	Night	33% 8% 12% 28% 16% 2	3301
September	1st to 10th	Night	31% 7% 13% 26% 19% 4	1981
	11th to 20th	Night	27% 7% 10% 29% 25% 2	2090
	21st to end	Night	39% 7% 11% 27% 15% 1	2090
October	1st to 10th	Night	24% 5% 10% 32% 28% 1	3499
	11th to 20th	Night	37% 6% 10% 24% 22%	3779
	21st to end	Night	36% 5% 9% 33% 16% 1	4436
November	1st to 10th	Night	41% 6% 13% 24% 15% 1	2452
	11th to 20th	Night	49% 7% 14% 19% 10% 1	2470
	21st to end	Night	55% 7% 13% 19% 7%	2470
December	1st to 10th	Night	60% 8% 12% 13% 7%	2470
	11th to 20th	Night	58% 9% 13% 13% 7% 1	3224
	21st to end	Night	72% 7% 11% 7% 3	4884

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	23% 19% 34% 17% 6% 1	270
	11th to 20th	Day	23% 16% 42% 14% 4	270
	21st to end	Day	24% 16% 33% 23% 5%	297
February	1st to 10th	Day	21% 19% 36% 19% 3 1	270
	11th to 20th	Day	24% 20% 34% 20% 2	270
	21st to end	Day	24% 20% 37% 16% 2	225
March	1st to 10th	Day	22% 18% 40% 17% 3	277
	11th to 20th	Day	22% 13% 35% 22% 7% 1	460
	21st to end	Day	28% 16% 31% 18% 7% 1	506
April	1st to 10th	Day	19% 15% 37% 19% 9%	460
	11th to 20th	Day	22% 20% 31% 16% 8% 4	452
	21st to end	Day	23% 12% 35% 19% 10% 2	460
May	1st to 10th	Day	20% 16% 32% 19% 10% 3	463
	11th to 20th	Day	23% 9% 29% 20% 15% 6%	487
	21st to end	Day	14% 6% 25% 27% 18% 10%	546
June	1st to 10th	Day	9% 8% 30% 31% 18% 4	680
	11th to 20th	Day	13% 8% 28% 29% 18% 5%	680
	21st to end	Day	12% 6% 30% 31% 15% 6%	680
July	1st to 10th	Day	10% 4 20% 29% 25% 12%	671
	11th to 20th	Day	10% 4 23% 28% 23% 12%	668
	21st to end	Day	7% 3 23% 32% 24% 11%	607
August	1st to 10th	Day	9% 4 19% 28% 24% 16%	486
	11th to 20th	Day	9% 5% 20% 29% 25% 11%	479
	21st to end	Day	9% 3 19% 30% 27% 13%	539
September	1st to 10th	Day	12% 5% 22% 28% 20% 13%	490
	11th to 20th	Day	10% 3 17% 26% 29% 15%	490
	21st to end	Day	18% 10% 21% 24% 19% 8%	490
October	1st to 10th	Day	13% 7% 28% 27% 17% 8%	490
	11th to 20th	Day	20% 14% 30% 24% 10% 2	490
	21st to end	Day	24% 14% 37% 19% 4 1	347
November	1st to 10th	Day	12% 13% 39% 24% 9% 4	279
	11th to 20th	Day	23% 19% 31% 21% 6% 1	270
	21st to end	Day	27% 15% 37% 17% 4	270
December	1st to 10th	Day	21% 28% 29% 13% 9% 1	270
	11th to 20th	Day	22% 20% 39% 15% 4	270
	21st to end	Day	24% 23% 33% 18% 2	297
January	1st to 10th	Night	22% 15% 36% 21% 5% 1	950
	11th to 20th	Night	25% 13% 37% 20% 5%	950
	21st to end	Night	21% 12% 36% 24% 6%	903
February	1st to 10th	Night	23% 13% 36% 24% 4	760
	11th to 20th	Night	20% 15% 37% 25% 3	743
	21st to end	Night	24% 16% 37% 20% 3	628
March	1st to 10th	Night	21% 11% 34% 27% 7%	760
	11th to 20th	Night	18% 13% 38% 25% 6% 1	760
	21st to end	Night	23% 11% 33% 25% 7%	836
April	1st to 10th	Night	17% 14% 37% 26% 5%	608
	11th to 20th	Night	20% 11% 36% 25% 8% 1	563
	21st to end	Night	21% 8% 35% 27% 9% 1	570
May	1st to 10th	Night	20% 8% 30% 31% 8% 2	570
	11th to 20th	Night	23% 3 31% 25% 16% 1	561
	21st to end	Night	12% 4 25% 38% 19% 3	617
June	1st to 10th	Night	12% 3 26% 42% 16%	570
	11th to 20th	Night	11% 4 24% 42% 19% 1	570
	21st to end	Night	8% 3 25% 40% 21% 2	570
July	1st to 10th	Night	8% 2 18% 39% 28% 5%	555
	11th to 20th	Night	10% 3 17% 41% 27% 3	552
	21st to end	Night	7% 2 18% 42% 31% 1	624
August	1st to 10th	Night	7% 2 14% 44% 29% 3	567
	11th to 20th	Night	10% 1 16% 40% 27% 5%	564
	21st to end	Night	9% 3 17% 33% 34% 4	627
September	1st to 10th	Night	13% 3 19% 33% 28% 4	651
	11th to 20th	Night	9% 3 17% 33% 34% 4	760
	21st to end	Night	17% 6% 21% 31% 21% 4	760
October	1st to 10th	Night	14% 6% 27% 31% 19% 3	760
	11th to 20th	Night	20% 13% 30% 26% 10% 1	760
	21st to end	Night	22% 14% 33% 26% 6%	836
November	1st to 10th	Night	17% 14% 31% 25% 12% 1	755
	11th to 20th	Night	20% 14% 35% 23% 7% 1	760
	21st to end	Night	21% 12% 37% 23% 6% 1	760
December	1st to 10th	Night	23% 15% 36% 21% 5%	760
	11th to 20th	Night	23% 13% 37% 22% 5%	893
	21st to end	Night	29% 13% 35% 20% 2	1045

Page generated at 2024-11-01 22:47:31. Version ac07

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