Hodges and North Wildlife Area
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Hodges and North Wildlife Area clear sky chart from 2005-11-06 to 2025-01-07.

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% 8% 3 8% 5% 4 4 4 6% 7% 37%	105184
	Night	13% 9% 3 8% 4 4 4 3 5% 6% 40%	103988
Transparency	Day	44% 6% 13% 23% 13% 1	108792
	Night	44% 5% 12% 24% 14% 2	108520
Seeing	Day	16% 10% 30% 27% 14% 4	16078
	Night	16% 9% 32% 32% 11% 1	26028

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	8% 13% 8% 19% 7% 6% 6% 3 4 4 21%	2575
	11th to 20th	Day	10% 12% 4 11% 8% 9% 6% 5% 8% 5% 23%	2624
	21st to end	Day	14% 17% 7% 16% 7% 5% 5% 3 4 5% 16%	3135
February	1st to 10th	Day	10% 12% 5% 10% 7% 6% 4 5% 5% 7% 28%	1710
	11th to 20th	Day	13% 10% 5% 7% 4 6% 5% 5% 6% 6% 34%	1664
	21st to end	Day	14% 10% 4 8% 7% 4 5% 4 5% 7% 33%	1565
March	1st to 10th	Day	15% 8% 4 8% 4 4 4 2 4 5% 41%	3298
	11th to 20th	Day	11% 6% 2 8% 5% 5% 5% 4 5% 8% 43%	3480
	21st to end	Day	22% 14% 5% 11% 5% 5% 4 3 5% 5% 21%	3926
April	1st to 10th	Day	19% 12% 3 8% 4 4 4 4 5% 6% 31%	2280
	11th to 20th	Day	17% 11% 3 8% 4 5% 4 4 5% 7% 32%	2254
	21st to end	Day	22% 8% 2 7% 4 4 4 4 5% 6% 33%	2330
May	1st to 10th	Day	19% 8% 3 7% 5% 5% 4 4 6% 7% 32%	4232
	11th to 20th	Day	15% 8% 3 7% 4 3 4 3 5% 7% 42%	4399
	21st to end	Day	16% 6% 2 6% 4 5% 4 4 6% 8% 40%	4824
June	1st to 10th	Day	11% 5% 2 5% 4 5% 5% 4 6% 8% 44%	2660
	11th to 20th	Day	11% 6% 2 6% 5% 4 5% 4 6% 8% 45%	2660
	21st to end	Day	12% 6% 3 6% 5% 4 5% 4 7% 9% 39%	2660
July	1st to 10th	Day	11% 7% 3 8% 5% 5% 6% 5% 7% 8% 36%	4440
	11th to 20th	Day	5% 4 1 5% 4 5% 4 3 6% 8% 55%	4440
	21st to end	Day	6% 4 2 6% 5% 5% 6% 5% 8% 10% 44%	4694
August	1st to 10th	Day	9% 6% 2 6% 4 5% 4 5% 7% 8% 44%	4104
	11th to 20th	Day	11% 6% 2 6% 5% 4 5% 4 6% 10% 40%	4018
	21st to end	Day	8% 4 2 6% 4 4 4 4 6% 8% 49%	4180
September	1st to 10th	Day	14% 4 2 5% 3 4 4 3 4 7% 51%	2280
	11th to 20th	Day	11% 4 2 5% 4 4 5% 5% 4 6% 50%	2280
	21st to end	Day	12% 5% 2 6% 4 4 3 4 5% 7% 47%	2000
October	1st to 10th	Day	14% 8% 2 5% 4 3 3 3 5% 6% 46%	1900
	11th to 20th	Day	17% 8% 2 7% 4 4 4 3 5% 7% 41%	1900
	21st to end	Day	17% 9% 4 5% 4 3 4 3 5% 6% 41%	2067
November	1st to 10th	Day	13% 7% 2 6% 4 4 4 4 5% 7% 44%	1762
	11th to 20th	Day	14% 12% 5% 8% 5% 4 4 3 5% 6% 34%	1643
	21st to end	Day	14% 11% 4 8% 4 4 4 4 5% 6% 37%	1600
December	1st to 10th	Day	7% 8% 3 9% 4 4 5% 3 7% 8% 41%	2610
	11th to 20th	Day	14% 13% 5% 13% 8% 5% 5% 3 5% 5% 23%	3008
	21st to end	Day	21% 22% 8% 14% 4 3 3 3 2 4 15%	3982
January	1st to 10th	Night	10% 13% 8% 17% 6% 5% 4 3 4 5% 25%	4513
	11th to 20th	Night	12% 15% 5% 12% 7% 4 4 4 8% 7% 22%	4344
	21st to end	Night	15% 15% 7% 15% 6% 5% 3 3 4 6% 21%	4532
February	1st to 10th	Night	11% 12% 5% 10% 7% 4 5% 3 4 6% 33%	2470
	11th to 20th	Night	10% 10% 3 8% 5% 5% 4 4 4 6% 40%	2403
	21st to end	Night	14% 10% 3 8% 6% 5% 4 3 4 6% 38%	1887
March	1st to 10th	Night	15% 9% 3 6% 4 3 3 2 4 5% 46%	3583
	11th to 20th	Night	11% 6% 2 6% 3 4 4 2 5% 8% 50%	3480
	21st to end	Night	26% 12% 4 12% 4 4 3 3 4 4 24%	3704
April	1st to 10th	Night	17% 9% 3 7% 4 4 3 3 5% 6% 40%	1900
	11th to 20th	Night	16% 9% 2 6% 5% 4 4 4 5% 6% 39%	1875
	21st to end	Night	18% 7% 2 6% 4 4 4 3 5% 6% 40%	1847
May	1st to 10th	Night	17% 8% 2 7% 3 4 5% 4 5% 6% 39%	2673
	11th to 20th	Night	11% 7% 3 7% 5% 4 3 3 5% 6% 46%	2506
	21st to end	Night	10% 7% 2 6% 5% 4 4 4 5% 7% 46%	2743
June	1st to 10th	Night	8% 5% 2 5% 4 3 5% 4 7% 8% 48%	1520
	11th to 20th	Night	9% 6% 2 5% 4 5% 5% 4 8% 9% 44%	1520
	21st to end	Night	11% 6% 2 5% 4 3 5% 5% 6% 7% 48%	1520
July	1st to 10th	Night	10% 7% 2 5% 3 5% 5% 4 7% 9% 43%	2530
	11th to 20th	Night	4 3 1 4 3 3 4 4 5% 9% 60%	2530
	21st to end	Night	5% 4 2 6% 5% 4 5% 5% 6% 7% 51%	2865
August	1st to 10th	Night	5% 4 2 5% 4 4 4 5% 7% 8% 52%	2836
	11th to 20th	Night	10% 5% 2 5% 3 4 3 3 5% 7% 53%	2819
	21st to end	Night	9% 5% 2 5% 4 4 4 3 5% 7% 53%	3476
September	1st to 10th	Night	10% 4 2 6% 4 3 3 2 5% 5% 55%	1900
	11th to 20th	Night	12% 4 2 5% 4 4 4 2 3 7% 54%	1900
	21st to end	Night	9% 5% 2 4 3 4 3 3 4 6% 56%	2157
October	1st to 10th	Night	12% 5% 2 5% 3 3 3 2 4 7% 53%	2280
	11th to 20th	Night	15% 8% 2 6% 4 3 3 3 4 5% 47%	2280
	21st to end	Night	16% 9% 3 6% 4 4 4 3 5% 5% 40%	2529
November	1st to 10th	Night	12% 7% 3 5% 3 3 3 4 4 6% 50%	2536
	11th to 20th	Night	13% 10% 4 8% 5% 4 4 4 4 6% 39%	2755
	21st to end	Night	15% 10% 3 7% 5% 4 4 3 4 6% 40%	2800
December	1st to 10th	Night	7% 7% 3 7% 4 5% 4 4 5% 8% 44%	4580
	11th to 20th	Night	15% 13% 4 10% 5% 4 4 3 4 6% 32%	5199
	21st to end	Night	22% 18% 7% 15% 5% 4 4 3 4 4 15%	6996

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	66% 6% 12% 11% 5%	2576
	11th to 20th	Day	59% 5% 13% 15% 8%	2624
	21st to end	Day	69% 5% 11% 11% 4	3135
February	1st to 10th	Day	54% 5% 14% 18% 8% 1	1710
	11th to 20th	Day	48% 6% 12% 24% 8% 1	1673
	21st to end	Day	51% 6% 12% 19% 9% 2	1565
March	1st to 10th	Day	46% 5% 11% 23% 14% 2	3298
	11th to 20th	Day	38% 7% 12% 31% 12% 1	3480
	21st to end	Day	63% 8% 11% 13% 4 1	3926
April	1st to 10th	Day	53% 5% 11% 22% 8%	2280
	11th to 20th	Day	50% 6% 12% 20% 11% 1	2254
	21st to end	Day	50% 5% 12% 20% 11% 2	2330
May	1st to 10th	Day	48% 7% 13% 19% 13% 1	4270
	11th to 20th	Day	41% 6% 11% 30% 12% 1	4403
	21st to end	Day	41% 7% 11% 23% 16% 1	4837
June	1st to 10th	Day	35% 8% 15% 25% 15% 2	2660
	11th to 20th	Day	36% 7% 13% 22% 20% 2	2660
	21st to end	Day	40% 8% 15% 23% 13% 2	2660
July	1st to 10th	Day	43% 7% 14% 26% 8% 1	4371
	11th to 20th	Day	26% 6% 16% 32% 18% 2	4365
	21st to end	Day	31% 10% 19% 21% 18% 1	4546
August	1st to 10th	Day	36% 7% 15% 27% 13% 2	4090
	11th to 20th	Day	38% 7% 16% 25% 13% 1	4057
	21st to end	Day	32% 6% 14% 30% 17% 1	4179
September	1st to 10th	Day	34% 6% 12% 26% 19% 3	2280
	11th to 20th	Day	33% 6% 13% 32% 15% 1	2280
	21st to end	Day	36% 6% 11% 30% 17% 1	2000
October	1st to 10th	Day	24% 3 6% 36% 30% 1	3160
	11th to 20th	Day	31% 4 10% 29% 23% 4	3140
	21st to end	Day	40% 3 11% 29% 14% 2	3381
November	1st to 10th	Day	39% 6% 12% 26% 13% 3	1762
	11th to 20th	Day	51% 5% 13% 20% 11% 1	1643
	21st to end	Day	48% 6% 16% 22% 8% 1	1600
December	1st to 10th	Day	41% 6% 12% 35% 5% 1	2610
	11th to 20th	Day	61% 5% 13% 12% 8% 1	3005
	21st to end	Day	75% 4 8% 10% 3	3982
January	1st to 10th	Night	60% 6% 10% 15% 8% 1	4513
	11th to 20th	Night	59% 4 12% 16% 9%	4344
	21st to end	Night	65% 5% 11% 14% 5% 1	4532
February	1st to 10th	Night	52% 5% 11% 20% 11% 1	2470
	11th to 20th	Night	44% 5% 12% 25% 12% 1	2404
	21st to end	Night	48% 5% 12% 20% 13% 2	1887
March	1st to 10th	Night	42% 4 9% 27% 16% 2	3583
	11th to 20th	Night	33% 5% 11% 32% 17% 2	3480
	21st to end	Night	63% 5% 11% 14% 5% 1	3704
April	1st to 10th	Night	45% 5% 10% 25% 13% 2	1900
	11th to 20th	Night	45% 6% 10% 21% 16% 3	1875
	21st to end	Night	43% 6% 11% 24% 14% 2	1847
May	1st to 10th	Night	43% 7% 10% 17% 21% 2	2700
	11th to 20th	Night	38% 6% 10% 28% 15% 3	2507
	21st to end	Night	34% 8% 12% 27% 16% 2	2751
June	1st to 10th	Night	31% 8% 15% 27% 15% 3	1520
	11th to 20th	Night	34% 7% 12% 23% 21% 4	1520
	21st to end	Night	33% 6% 15% 26% 16% 3	1520
July	1st to 10th	Night	35% 8% 17% 26% 12% 2	2490
	11th to 20th	Night	22% 6% 18% 37% 15% 2	2482
	21st to end	Night	29% 8% 17% 23% 20% 2	2774
August	1st to 10th	Night	27% 8% 15% 31% 17% 1	2826
	11th to 20th	Night	31% 6% 15% 34% 13% 1	2846
	21st to end	Night	31% 6% 13% 27% 18% 5%	3476
September	1st to 10th	Night	31% 5% 10% 27% 25% 2	1900
	11th to 20th	Night	32% 4 10% 34% 19% 1	1900
	21st to end	Night	29% 5% 11% 31% 22% 2	2157
October	1st to 10th	Night	24% 2 7% 31% 34% 2	3800
	11th to 20th	Night	28% 3 10% 24% 29% 6%	3779
	21st to end	Night	46% 4 9% 23% 15% 3	4165
November	1st to 10th	Night	36% 5% 14% 25% 17% 3	2536
	11th to 20th	Night	46% 6% 13% 23% 12% 2	2755
	21st to end	Night	47% 4 12% 26% 10% 1	2800
December	1st to 10th	Night	38% 4 17% 31% 9%	4580
	11th to 20th	Night	54% 5% 13% 23% 5% 1	5201
	21st to end	Night	73% 4 8% 11% 4	6996

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	17% 13% 36% 25% 7% 2	288
	11th to 20th	Day	23% 9% 41% 23% 4	270
	21st to end	Day	18% 15% 32% 28% 6% 1	297
February	1st to 10th	Day	15% 20% 36% 24% 4 1	270
	11th to 20th	Day	18% 17% 35% 21% 7% 1	270
	21st to end	Day	20% 16% 40% 19% 4	225
March	1st to 10th	Day	14% 17% 43% 19% 6% 1	270
	11th to 20th	Day	22% 14% 34% 21% 8% 1	270
	21st to end	Day	34% 12% 30% 17% 6% 1	358
April	1st to 10th	Day	25% 14% 37% 18% 5% 1	460
	11th to 20th	Day	25% 17% 29% 21% 9% 1	452
	21st to end	Day	25% 15% 34% 17% 9% 2	510
May	1st to 10th	Day	23% 13% 30% 23% 9% 1	653
	11th to 20th	Day	21% 12% 28% 25% 12% 3	675
	21st to end	Day	17% 9% 28% 27% 15% 4	734
June	1st to 10th	Day	10% 5% 28% 32% 20% 6%	680
	11th to 20th	Day	13% 7% 28% 35% 16% 2	680
	21st to end	Day	12% 7% 32% 31% 13% 4	680
July	1st to 10th	Day	9% 3 20% 32% 24% 12%	671
	11th to 20th	Day	7% 2 27% 33% 24% 7%	668
	21st to end	Day	6% 3 23% 36% 26% 5%	739
August	1st to 10th	Day	8% 3 23% 32% 27% 7%	676
	11th to 20th	Day	13% 5% 19% 31% 23% 10%	655
	21st to end	Day	9% 4 23% 34% 24% 6%	539
September	1st to 10th	Day	14% 6% 22% 31% 22% 6%	490
	11th to 20th	Day	10% 2 26% 36% 20% 6%	490
	21st to end	Day	15% 10% 30% 28% 14% 3	348
October	1st to 10th	Day	17% 9% 32% 24% 15% 4	300
	11th to 20th	Day	23% 18% 35% 16% 8%	300
	21st to end	Day	23% 14% 36% 20% 5% 2	330
November	1st to 10th	Day	17% 11% 35% 28% 6% 3	300
	11th to 20th	Day	18% 21% 30% 22% 7% 1	300
	21st to end	Day	23% 12% 37% 23% 5%	300
December	1st to 10th	Day	11% 15% 43% 21% 7% 2	300
	11th to 20th	Day	19% 15% 36% 21% 8% 1	300
	21st to end	Day	29% 13% 38% 17% 3	330
January	1st to 10th	Night	14% 13% 38% 27% 7%	981
	11th to 20th	Night	17% 13% 35% 29% 6%	950
	21st to end	Night	20% 10% 35% 30% 5%	1045
February	1st to 10th	Night	17% 13% 35% 29% 6% 1	950
	11th to 20th	Night	16% 12% 39% 28% 6%	929
	21st to end	Night	19% 12% 38% 26% 4 1	631
March	1st to 10th	Night	20% 12% 36% 25% 6% 1	675
	11th to 20th	Night	18% 9% 35% 29% 8% 1	570
	21st to end	Night	25% 11% 34% 23% 6% 1	627
April	1st to 10th	Night	20% 13% 40% 24% 3	570
	11th to 20th	Night	18% 13% 36% 25% 6% 1	563
	21st to end	Night	21% 9% 33% 28% 7% 1	570
May	1st to 10th	Night	18% 8% 33% 31% 8% 1	570
	11th to 20th	Night	16% 7% 33% 34% 9% 1	561
	21st to end	Night	14% 6% 30% 34% 15% 1	617
June	1st to 10th	Night	11% 4 27% 42% 16% 1	570
	11th to 20th	Night	10% 4 32% 42% 12% 1	570
	21st to end	Night	13% 4 26% 40% 16% 1	570
July	1st to 10th	Night	6% 2 14% 45% 31% 3	555
	11th to 20th	Night	6% 3 19% 42% 27% 4	552
	21st to end	Night	6% 2 18% 49% 24% 2	624
August	1st to 10th	Night	5% 2 16% 47% 28% 2	567
	11th to 20th	Night	11% 3 15% 40% 26% 5%	564
	21st to end	Night	9% 2 19% 42% 25% 3	627
September	1st to 10th	Night	11% 4 19% 40% 21% 4	570
	11th to 20th	Night	13% 3 20% 39% 24% 2	570
	21st to end	Night	10% 7% 27% 37% 17% 2	689
October	1st to 10th	Night	15% 6% 29% 35% 14% 1	760
	11th to 20th	Night	18% 11% 33% 28% 9%	760
	21st to end	Night	22% 11% 31% 28% 7%	836
November	1st to 10th	Night	16% 9% 37% 29% 8% 1	780
	11th to 20th	Night	16% 12% 40% 24% 7%	955
	21st to end	Night	19% 12% 36% 25% 8%	1000
December	1st to 10th	Night	17% 11% 39% 26% 5% 1	1000
	11th to 20th	Night	22% 9% 34% 28% 6% 1	1000
	21st to end	Night	26% 12% 34% 23% 6%	1100

Page generated at 2025-01-04 02:24:01. Version ac07

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