Jasper-Pulaski Fish and Wildlife Area
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Jasper-Pulaski Fish and Wildlife Area clear sky chart from 2005-11-06 to 2024-11-02.

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 8% 5% 4 5% 4 6% 7% 36%	101118
	Night	15% 10% 3 7% 5% 4 4 3 5% 6% 37%	97864
Transparency	Day	46% 6% 12% 21% 13% 2	100909
	Night	47% 5% 12% 21% 13% 2	97745
Seeing	Day	17% 9% 28% 25% 15% 6%	15719
	Night	19% 9% 29% 30% 13% 1	25544

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% 15% 10% 13% 5% 4 4 4 5% 5% 19%	2527
	11th to 20th	Day	13% 18% 8% 15% 6% 5% 4 8% 6% 3 15%	2530
	21st to end	Day	25% 24% 5% 9% 4 3 3 2 4 5% 17%	2787
February	1st to 10th	Day	17% 15% 4 11% 6% 4 4 4 4 5% 27%	1850
	11th to 20th	Day	15% 11% 4 9% 5% 5% 4 3 5% 6% 32%	1848
	21st to end	Day	17% 14% 5% 10% 4 4 4 3 5% 6% 28%	1570
March	1st to 10th	Day	19% 17% 5% 7% 4 4 3 3 4 5% 29%	3120
	11th to 20th	Day	12% 7% 4 8% 5% 5% 5% 4 5% 7% 39%	3288
	21st to end	Day	18% 10% 5% 10% 6% 6% 5% 4 5% 6% 24%	4091
April	1st to 10th	Day	17% 12% 3 7% 4 4 4 3 6% 6% 33%	2280
	11th to 20th	Day	18% 9% 3 6% 4 3 4 4 5% 6% 37%	2254
	21st to end	Day	20% 9% 3 7% 5% 4 4 4 5% 7% 33%	2427
May	1st to 10th	Day	18% 7% 3 7% 4 5% 5% 4 7% 8% 31%	4082
	11th to 20th	Day	15% 7% 2 7% 4 4 5% 4 6% 9% 37%	4081
	21st to end	Day	9% 6% 2 5% 4 4 4 4 6% 9% 45%	4824
June	1st to 10th	Day	11% 5% 2 6% 4 5% 5% 4 7% 8% 43%	2660
	11th to 20th	Day	10% 5% 2 5% 4 5% 5% 4 7% 7% 45%	2660
	21st to end	Day	11% 6% 2 6% 6% 5% 5% 5% 6% 9% 39%	2660
July	1st to 10th	Day	13% 7% 2 7% 5% 6% 6% 5% 7% 9% 35%	4440
	11th to 20th	Day	7% 4 2 5% 4 4 6% 5% 7% 11% 46%	4440
	21st to end	Day	9% 6% 2 7% 5% 5% 6% 4 6% 9% 41%	4813
August	1st to 10th	Day	8% 5% 2 6% 5% 5% 5% 4 6% 8% 47%	4167
	11th to 20th	Day	9% 5% 2 5% 5% 4 5% 4 7% 9% 46%	3834
	21st to end	Day	7% 4 2 5% 4 4 5% 4 6% 10% 49%	4180
September	1st to 10th	Day	10% 5% 2 6% 4 4 5% 4 5% 8% 48%	2280
	11th to 20th	Day	11% 4 2 5% 4 4 4 4 7% 8% 47%	2104
	21st to end	Day	11% 7% 2 6% 5% 4 5% 4 6% 8% 42%	2090
October	1st to 10th	Day	12% 6% 2 6% 3 3 4 4 5% 7% 46%	2090
	11th to 20th	Day	18% 7% 2 6% 4 5% 5% 3 5% 6% 39%	1881
	21st to end	Day	21% 8% 3 8% 5% 4 5% 3 6% 7% 30%	1881
November	1st to 10th	Day	12% 8% 2 6% 4 4 4 3 6% 6% 47%	1681
	11th to 20th	Day	19% 10% 3 7% 6% 4 3 3 5% 6% 35%	1710
	21st to end	Day	18% 13% 3 7% 5% 4 4 3 4 5% 35%	1710
December	1st to 10th	Day	17% 13% 4 11% 6% 4 4 3 4 6% 28%	1577
	11th to 20th	Day	14% 14% 5% 12% 6% 5% 4 4 5% 6% 25%	1918
	21st to end	Day	23% 22% 8% 14% 5% 3 3 2 4 3 13%	2783
January	1st to 10th	Night	17% 17% 8% 11% 5% 4 3 3 5% 4 22%	4428
	11th to 20th	Night	15% 21% 8% 13% 5% 4 4 4 6% 3 17%	4440
	21st to end	Night	25% 17% 6% 11% 4 3 3 2 3 4 20%	4876
February	1st to 10th	Night	18% 14% 4 8% 6% 4 4 3 4 5% 29%	2328
	11th to 20th	Night	15% 11% 4 8% 5% 5% 4 3 5% 6% 36%	2218
	21st to end	Night	20% 14% 3 8% 4 4 3 3 4 5% 31%	1884
March	1st to 10th	Night	17% 12% 3 7% 4 4 3 2 4 6% 37%	3733
	11th to 20th	Night	11% 7% 2 7% 5% 4 4 3 5% 6% 46%	3658
	21st to end	Night	20% 9% 3 8% 5% 4 5% 4 5% 6% 31%	3567
April	1st to 10th	Night	14% 9% 3 6% 5% 4 4 3 5% 8% 38%	1900
	11th to 20th	Night	19% 9% 2 6% 4 4 3 3 4 7% 38%	1875
	21st to end	Night	18% 8% 3 6% 5% 5% 4 4 6% 6% 36%	1753
May	1st to 10th	Night	16% 9% 3 7% 6% 5% 4 4 6% 8% 33%	2813
	11th to 20th	Night	19% 6% 2 5% 3 4 4 4 6% 8% 38%	2795
	21st to end	Night	11% 7% 3 6% 5% 5% 5% 3 5% 7% 44%	2743
June	1st to 10th	Night	10% 5% 2 5% 4 5% 3 4 5% 8% 49%	1520
	11th to 20th	Night	8% 5% 2 6% 4 5% 4 4 6% 8% 48%	1520
	21st to end	Night	11% 5% 2 6% 5% 6% 5% 4 6% 9% 42%	1520
July	1st to 10th	Night	9% 5% 2 6% 5% 4 4 4 6% 9% 44%	2530
	11th to 20th	Night	7% 4 2 5% 4 3 4 3 5% 8% 55%	2530
	21st to end	Night	6% 5% 2 7% 6% 4 5% 5% 7% 9% 44%	2750
August	1st to 10th	Night	8% 5% 2 6% 5% 4 4 4 7% 9% 47%	2761
	11th to 20th	Night	7% 5% 2 5% 3 4 4 4 6% 8% 51%	2977
	21st to end	Night	8% 5% 2 6% 4 4 4 4 5% 7% 52%	3476
September	1st to 10th	Night	10% 4 2 6% 4 4 3 3 5% 6% 52%	1900
	11th to 20th	Night	9% 4 1 4 3 3 4 3 5% 8% 55%	2057
	21st to end	Night	11% 6% 2 6% 4 3 5% 4 5% 8% 46%	2090
October	1st to 10th	Night	12% 5% 2 5% 3 4 4 3 5% 6% 52%	2090
	11th to 20th	Night	17% 7% 2 6% 3 3 4 3 4 6% 45%	2294
	21st to end	Night	20% 9% 2 6% 4 4 3 3 5% 5% 38%	2717
November	1st to 10th	Night	13% 8% 2 6% 4 4 3 3 5% 7% 45%	2420
	11th to 20th	Night	14% 10% 3 7% 4 4 4 4 6% 6% 36%	2470
	21st to end	Night	18% 11% 3 7% 5% 4 4 3 4 6% 34%	2470
December	1st to 10th	Night	16% 13% 5% 10% 4 3 4 3 6% 6% 30%	2598
	11th to 20th	Night	16% 14% 5% 9% 5% 4 4 4 5% 5% 28%	3279
	21st to end	Night	25% 18% 6% 10% 5% 4 4 3 4 5% 15%	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	65% 6% 10% 14% 5%	2528
	11th to 20th	Day	70% 4 9% 9% 7%	2530
	21st to end	Day	72% 3 9% 12% 4	2787
February	1st to 10th	Day	60% 5% 10% 16% 7% 2	1850
	11th to 20th	Day	52% 5% 10% 23% 9% 1	1858
	21st to end	Day	55% 6% 12% 18% 7% 2	1570
March	1st to 10th	Day	58% 5% 10% 18% 9% 1	3120
	11th to 20th	Day	43% 6% 12% 29% 10% 1	3288
	21st to end	Day	58% 7% 17% 15% 3	4091
April	1st to 10th	Day	50% 6% 11% 20% 12%	2280
	11th to 20th	Day	47% 6% 11% 23% 11% 3	2254
	21st to end	Day	50% 6% 12% 19% 11% 2	2427
May	1st to 10th	Day	48% 8% 13% 24% 7%	4120
	11th to 20th	Day	43% 8% 14% 25% 10% 1	4085
	21st to end	Day	32% 8% 13% 23% 22% 2	4837
June	1st to 10th	Day	36% 7% 13% 24% 16% 4	2660
	11th to 20th	Day	35% 8% 11% 23% 20% 4	2660
	21st to end	Day	39% 9% 15% 19% 15% 3	2660
July	1st to 10th	Day	44% 7% 13% 21% 13% 2	4371
	11th to 20th	Day	30% 7% 15% 30% 16% 2	4365
	21st to end	Day	40% 7% 14% 18% 18% 3	4662
August	1st to 10th	Day	34% 7% 15% 28% 15% 1	4152
	11th to 20th	Day	33% 7% 13% 29% 17% 1	3873
	21st to end	Day	30% 6% 14% 26% 20% 4	4179
September	1st to 10th	Day	33% 7% 13% 25% 17% 4	2280
	11th to 20th	Day	33% 5% 13% 25% 20% 4	2104
	21st to end	Day	38% 5% 11% 24% 20% 2	2090
October	1st to 10th	Day	36% 6% 12% 25% 19% 2	2090
	11th to 20th	Day	45% 5% 11% 22% 16% 1	1881
	21st to end	Day	52% 5% 11% 21% 10% 1	1881
November	1st to 10th	Day	37% 5% 15% 25% 15% 3	1681
	11th to 20th	Day	50% 4 12% 21% 11% 1	1710
	21st to end	Day	52% 5% 13% 21% 9% 1	1710
December	1st to 10th	Day	59% 4 13% 16% 8%	1577
	11th to 20th	Day	59% 6% 11% 20% 4	1915
	21st to end	Day	77% 4 8% 8% 3	2783
January	1st to 10th	Night	64% 5% 11% 14% 6%	4428
	11th to 20th	Night	71% 3 11% 10% 5%	4440
	21st to end	Night	69% 4 9% 13% 5%	4876
February	1st to 10th	Night	57% 5% 11% 16% 9% 2	2328
	11th to 20th	Night	50% 5% 12% 20% 12% 1	2219
	21st to end	Night	55% 5% 11% 17% 10% 3	1884
March	1st to 10th	Night	49% 5% 11% 23% 9% 2	3733
	11th to 20th	Night	38% 5% 12% 26% 17% 2	3658
	21st to end	Night	52% 7% 13% 21% 5% 1	3567
April	1st to 10th	Night	43% 6% 14% 21% 14% 2	1900
	11th to 20th	Night	46% 5% 8% 21% 16% 3	1875
	21st to end	Night	47% 6% 10% 21% 13% 3	1753
May	1st to 10th	Night	47% 8% 11% 21% 11% 1	2840
	11th to 20th	Night	42% 8% 15% 24% 10% 1	2796
	21st to end	Night	37% 8% 11% 17% 22% 4	2751
June	1st to 10th	Night	32% 5% 13% 26% 21% 2	1520
	11th to 20th	Night	33% 6% 12% 24% 21% 4	1520
	21st to end	Night	37% 8% 16% 20% 15% 4	1520
July	1st to 10th	Night	36% 5% 14% 26% 13% 5%	2490
	11th to 20th	Night	27% 6% 12% 26% 27% 2	2482
	21st to end	Night	34% 7% 16% 19% 19% 5%	2662
August	1st to 10th	Night	32% 7% 17% 28% 15% 1	2752
	11th to 20th	Night	29% 6% 15% 29% 19% 1	3004
	21st to end	Night	31% 6% 11% 29% 20% 3	3476
September	1st to 10th	Night	31% 6% 13% 23% 20% 6%	1900
	11th to 20th	Night	27% 6% 8% 28% 27% 4	2057
	21st to end	Night	35% 6% 10% 26% 19% 3	2090
October	1st to 10th	Night	33% 6% 10% 28% 22% 1	2090
	11th to 20th	Night	40% 4 10% 26% 19% 2	2294
	21st to end	Night	48% 4 10% 22% 14% 2	2717
November	1st to 10th	Night	40% 5% 10% 24% 18% 3	2420
	11th to 20th	Night	46% 6% 12% 21% 13% 2	2470
	21st to end	Night	53% 4 10% 24% 9%	2470
December	1st to 10th	Night	55% 4 13% 19% 9% 1	2598
	11th to 20th	Night	57% 5% 12% 18% 7% 1	3281
	21st to end	Night	72% 5% 10% 10% 4	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% 16% 32% 22% 6% 1	270
	11th to 20th	Day	24% 17% 34% 18% 5% 2	270
	21st to end	Day	28% 15% 31% 20% 6%	297
February	1st to 10th	Day	24% 16% 35% 20% 5%	270
	11th to 20th	Day	24% 15% 36% 19% 4 1	270
	21st to end	Day	24% 17% 39% 14% 5%	225
March	1st to 10th	Day	23% 20% 36% 19% 2	270
	11th to 20th	Day	22% 15% 35% 20% 8%	346
	21st to end	Day	28% 13% 32% 19% 6% 1	506
April	1st to 10th	Day	22% 14% 31% 23% 8% 2	460
	11th to 20th	Day	21% 13% 35% 17% 11% 3	452
	21st to end	Day	25% 14% 30% 20% 9% 2	460
May	1st to 10th	Day	23% 10% 29% 25% 9% 4	463
	11th to 20th	Day	20% 8% 28% 22% 16% 5%	487
	21st to end	Day	13% 6% 28% 26% 18% 8%	734
June	1st to 10th	Day	11% 8% 27% 28% 19% 6%	680
	11th to 20th	Day	12% 7% 25% 32% 19% 6%	680
	21st to end	Day	13% 6% 30% 29% 15% 6%	680
July	1st to 10th	Day	11% 3 19% 28% 21% 18%	671
	11th to 20th	Day	9% 2 24% 29% 22% 13%	668
	21st to end	Day	10% 3 19% 33% 24% 11%	739
August	1st to 10th	Day	9% 2 18% 28% 30% 13%	524
	11th to 20th	Day	11% 3 21% 28% 24% 13%	479
	21st to end	Day	10% 2 16% 32% 28% 12%	539
September	1st to 10th	Day	11% 5% 19% 30% 26% 9%	490
	11th to 20th	Day	10% 3 16% 27% 29% 16%	490
	21st to end	Day	15% 9% 20% 24% 24% 8%	490
October	1st to 10th	Day	15% 5% 28% 28% 19% 6%	490
	11th to 20th	Day	19% 17% 26% 25% 11% 1	339
	21st to end	Day	32% 11% 36% 15% 5% 1	330
November	1st to 10th	Day	12% 11% 36% 23% 13% 5%	273
	11th to 20th	Day	25% 13% 34% 18% 9% 2	270
	21st to end	Day	27% 11% 37% 19% 5%	270
December	1st to 10th	Day	19% 17% 36% 21% 7%	270
	11th to 20th	Day	21% 15% 37% 19% 7%	270
	21st to end	Day	28% 15% 36% 17% 3	297
January	1st to 10th	Night	23% 15% 35% 22% 5%	950
	11th to 20th	Night	25% 14% 34% 22% 4	950
	21st to end	Night	23% 12% 35% 25% 4	1045
February	1st to 10th	Night	25% 10% 37% 24% 4	808
	11th to 20th	Night	21% 14% 35% 26% 4	743
	21st to end	Night	26% 13% 37% 21% 3	628
March	1st to 10th	Night	21% 14% 36% 24% 5%	760
	11th to 20th	Night	19% 10% 39% 26% 6%	760
	21st to end	Night	24% 10% 34% 26% 6%	689
April	1st to 10th	Night	19% 11% 38% 24% 7%	570
	11th to 20th	Night	23% 8% 34% 27% 7% 1	563
	21st to end	Night	21% 9% 34% 27% 8%	570
May	1st to 10th	Night	21% 6% 34% 30% 8% 1	570
	11th to 20th	Night	20% 5% 26% 33% 15% 1	561
	21st to end	Night	12% 3 24% 40% 19% 1	617
June	1st to 10th	Night	11% 2 24% 45% 16%	570
	11th to 20th	Night	11% 2 27% 41% 19% 1	570
	21st to end	Night	12% 3 23% 40% 21% 1	570
July	1st to 10th	Night	8% 2 15% 41% 28% 6%	555
	11th to 20th	Night	10% 2 16% 39% 29% 4	552
	21st to end	Night	7% 2 13% 46% 31% 1	624
August	1st to 10th	Night	7% 1 10% 46% 31% 5%	567
	11th to 20th	Night	9% 1 13% 43% 31% 3	564
	21st to end	Night	9% 1 14% 38% 34% 3	627
September	1st to 10th	Night	12% 2 14% 41% 27% 4	570
	11th to 20th	Night	10% 3 15% 37% 30% 3	727
	21st to end	Night	13% 6% 23% 31% 25% 3	760
October	1st to 10th	Night	14% 5% 23% 37% 19% 2	760
	11th to 20th	Night	20% 12% 28% 29% 9%	760
	21st to end	Night	24% 13% 30% 26% 7%	836
November	1st to 10th	Night	17% 11% 36% 26% 10% 1	745
	11th to 20th	Night	21% 14% 32% 26% 7% 1	760
	21st to end	Night	23% 13% 32% 26% 6%	760
December	1st to 10th	Night	24% 14% 34% 23% 5%	888
	11th to 20th	Night	25% 10% 32% 27% 6%	950
	21st to end	Night	32% 12% 30% 23% 4	1045

Page generated at 2024-10-30 00:22:58. Version ac07

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