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 2024-03-06.

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	15% 9% 4 7% 6% 3 5% 5% 5% 7% 35%	78445
	Night	16% 10% 4 7% 5% 3 4 4 5% 6% 36%	81118
Transparency	Day	48% 6% 12% 20% 12% 2	78146
	Night	49% 5% 12% 20% 13% 2	80938
Seeing	Day	17% 9% 27% 25% 15% 6%	14712
	Night	19% 9% 29% 30% 13% 1	24754

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% 11% 12% 7% 3 4 5% 5% 5% 19%	2527
	11th to 20th	Day	14% 17% 8% 13% 7% 4 4 9% 6% 3 15%	2530
	21st to end	Day	26% 22% 6% 8% 4 3 3 3 3 5% 17%	2787
February	1st to 10th	Day	17% 13% 5% 10% 7% 3 4 5% 3 5% 27%	1850
	11th to 20th	Day	16% 10% 5% 8% 6% 4 4 4 5% 6% 32%	1848
	21st to end	Day	17% 12% 6% 9% 5% 3 3 4 5% 7% 29%	1570
March	1st to 10th	Day	18% 12% 6% 7% 6% 3 5% 4 4 5% 30%	1850
	11th to 20th	Day	16% 9% 4 7% 6% 3 6% 5% 5% 6% 33%	1872
	21st to end	Day	22% 11% 4 7% 6% 4 5% 4 5% 6% 25%	2330
April	1st to 10th	Day	17% 11% 4 6% 5% 3 5% 4 6% 6% 33%	2160
	11th to 20th	Day	18% 9% 3 5% 5% 3 4 5% 5% 7% 37%	2134
	21st to end	Day	20% 8% 3 6% 6% 3 4 5% 5% 7% 33%	2299
May	1st to 10th	Day	19% 8% 4 7% 5% 3 5% 5% 6% 8% 31%	2340
	11th to 20th	Day	19% 7% 2 6% 5% 3 5% 4 5% 8% 35%	2301
	21st to end	Day	12% 6% 2 5% 6% 3 5% 5% 6% 9% 40%	2725
June	1st to 10th	Day	11% 4 3 5% 5% 4 5% 5% 6% 8% 43%	2520
	11th to 20th	Day	10% 5% 3 4 5% 4 5% 5% 6% 7% 45%	2520
	21st to end	Day	11% 5% 2 6% 6% 4 5% 7% 6% 9% 39%	2520
July	1st to 10th	Day	9% 5% 2 5% 5% 3 5% 6% 6% 9% 45%	2520
	11th to 20th	Day	9% 4 2 5% 4 3 5% 6% 7% 9% 46%	2520
	21st to end	Day	8% 4 2 5% 6% 3 6% 5% 6% 10% 45%	2743
August	1st to 10th	Day	7% 4 3 5% 6% 4 6% 5% 7% 8% 46%	2363
	11th to 20th	Day	9% 4 2 5% 7% 3 6% 6% 7% 9% 43%	2191
	21st to end	Day	9% 4 2 4 4 3 5% 5% 6% 10% 48%	2376
September	1st to 10th	Day	10% 5% 3 5% 5% 4 5% 5% 5% 8% 46%	2160
	11th to 20th	Day	12% 4 2 4 5% 4 4 5% 6% 8% 46%	1994
	21st to end	Day	10% 5% 2 6% 5% 3 5% 5% 6% 8% 44%	1980
October	1st to 10th	Day	13% 6% 2 6% 4 3 4 5% 6% 8% 45%	1980
	11th to 20th	Day	19% 6% 2 6% 5% 4 4 5% 5% 7% 37%	1783
	21st to end	Day	22% 8% 3 7% 6% 3 5% 4 6% 6% 30%	1782
November	1st to 10th	Day	12% 7% 2 6% 4 3 4 4 6% 6% 47%	1672
	11th to 20th	Day	19% 9% 4 6% 6% 2 3 4 5% 6% 36%	1710
	21st to end	Day	18% 11% 4 6% 6% 2 4 4 4 5% 35%	1710
December	1st to 10th	Day	17% 12% 5% 10% 7% 3 4 4 4 6% 28%	1577
	11th to 20th	Day	15% 13% 5% 11% 7% 3 4 5% 5% 7% 25%	1918
	21st to end	Day	23% 22% 8% 12% 7% 2 3 3 3 3 13%	2783
January	1st to 10th	Night	17% 17% 8% 10% 7% 3 3 4 4 4 23%	4428
	11th to 20th	Night	15% 20% 8% 12% 7% 3 4 5% 6% 3 17%	4440
	21st to end	Night	25% 16% 7% 10% 5% 3 3 3 3 4 21%	4876
February	1st to 10th	Night	18% 13% 5% 7% 8% 3 4 4 4 5% 29%	2328
	11th to 20th	Night	15% 10% 4 7% 6% 4 4 4 4 6% 36%	2218
	21st to end	Night	20% 13% 4 8% 5% 2 4 4 4 5% 31%	1884
March	1st to 10th	Night	15% 11% 4 7% 6% 3 5% 4 4 5% 35%	2227
	11th to 20th	Night	14% 8% 3 6% 5% 3 4 4 6% 7% 40%	2088
	21st to end	Night	21% 10% 4 6% 5% 2 4 5% 5% 6% 33%	2039
April	1st to 10th	Night	14% 7% 4 5% 5% 3 5% 5% 6% 8% 39%	1800
	11th to 20th	Night	19% 9% 3 5% 5% 3 3 4 4 7% 38%	1775
	21st to end	Night	18% 8% 3 6% 5% 3 5% 5% 6% 6% 36%	1661
May	1st to 10th	Night	17% 9% 3 6% 5% 3 4 6% 6% 7% 34%	1620
	11th to 20th	Night	19% 5% 2 5% 4 4 4 5% 5% 7% 39%	1588
	21st to end	Night	10% 5% 3 6% 5% 3 6% 5% 6% 8% 42%	1551
June	1st to 10th	Night	10% 4 2 4 4 4 3 5% 5% 8% 50%	1440
	11th to 20th	Night	9% 4 2 5% 4 3 4 5% 6% 8% 49%	1440
	21st to end	Night	11% 4 3 5% 6% 4 6% 5% 5% 9% 43%	1440
July	1st to 10th	Night	6% 5% 2 5% 5% 3 4 5% 6% 10% 51%	1440
	11th to 20th	Night	9% 2 2 4 4 3 4 4 5% 9% 54%	1440
	21st to end	Night	6% 3 2 4 5% 3 4 5% 6% 10% 53%	1575
August	1st to 10th	Night	6% 4 1 5% 5% 3 4 6% 6% 10% 50%	1572
	11th to 20th	Night	7% 3 2 5% 4 4 4 5% 6% 9% 51%	1706
	21st to end	Night	8% 3 2 4 5% 3 5% 5% 6% 7% 53%	1980
September	1st to 10th	Night	11% 4 2 5% 5% 3 4 4 5% 7% 51%	1800
	11th to 20th	Night	9% 4 2 4 3 3 4 4 5% 8% 55%	1948
	21st to end	Night	10% 5% 2 5% 5% 3 4 4 5% 8% 48%	1980
October	1st to 10th	Night	13% 5% 2 4 4 3 4 4 5% 6% 51%	1980
	11th to 20th	Night	18% 7% 2 5% 4 2 4 3 4 6% 44%	2173
	21st to end	Night	21% 9% 3 6% 5% 3 3 4 5% 5% 38%	2574
November	1st to 10th	Night	13% 8% 3 5% 4 3 4 4 5% 7% 45%	2406
	11th to 20th	Night	15% 9% 4 6% 5% 3 4 5% 6% 6% 37%	2470
	21st to end	Night	18% 10% 4 7% 6% 3 4 4 4 6% 35%	2470
December	1st to 10th	Night	17% 12% 5% 9% 5% 3 4 4 5% 6% 31%	2598
	11th to 20th	Night	16% 14% 5% 9% 6% 4 4 5% 5% 5% 29%	3279
	21st to end	Night	25% 17% 6% 9% 6% 3 5% 4 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	56% 5% 11% 20% 7%	1850
	11th to 20th	Day	51% 6% 11% 21% 10% 1	1872
	21st to end	Day	60% 5% 12% 18% 5% 1	2330
April	1st to 10th	Day	50% 6% 12% 20% 12%	2160
	11th to 20th	Day	47% 6% 11% 22% 11% 3	2134
	21st to end	Day	50% 6% 12% 18% 11% 3	2299
May	1st to 10th	Day	50% 7% 12% 23% 7% 1	2340
	11th to 20th	Day	48% 7% 13% 18% 13% 1	2305
	21st to end	Day	40% 8% 12% 22% 15% 2	2725
June	1st to 10th	Day	36% 7% 13% 24% 16% 4	2520
	11th to 20th	Day	35% 8% 11% 22% 20% 4	2520
	21st to end	Day	39% 9% 15% 19% 15% 3	2520
July	1st to 10th	Day	35% 8% 13% 24% 16% 4	2451
	11th to 20th	Day	33% 8% 14% 27% 15% 3	2445
	21st to end	Day	34% 7% 15% 26% 15% 3	2591
August	1st to 10th	Day	34% 7% 16% 28% 14% 2	2348
	11th to 20th	Day	34% 8% 17% 23% 16% 2	2191
	21st to end	Day	31% 8% 13% 25% 18% 6%	2376
September	1st to 10th	Day	35% 7% 14% 24% 16% 5%	2160
	11th to 20th	Day	34% 6% 13% 25% 18% 4	1994
	21st to end	Day	36% 5% 12% 24% 20% 2	1980
October	1st to 10th	Day	37% 6% 13% 24% 18% 2	1980
	11th to 20th	Day	46% 5% 11% 22% 15% 1	1783
	21st to end	Day	53% 5% 11% 20% 10% 1	1782
November	1st to 10th	Day	38% 5% 15% 25% 15% 3	1672
	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	52% 5% 11% 21% 10% 1	2227
	11th to 20th	Night	42% 5% 14% 22% 13% 3	2088
	21st to end	Night	52% 7% 11% 21% 9% 1	2039
April	1st to 10th	Night	43% 6% 15% 21% 14% 2	1800
	11th to 20th	Night	46% 5% 8% 21% 16% 3	1775
	21st to end	Night	47% 6% 10% 21% 13% 3	1661
May	1st to 10th	Night	48% 8% 11% 22% 10% 1	1620
	11th to 20th	Night	44% 7% 12% 20% 15% 1	1589
	21st to end	Night	38% 9% 14% 18% 17% 3	1552
June	1st to 10th	Night	32% 5% 13% 26% 21% 3	1440
	11th to 20th	Night	33% 6% 12% 25% 21% 4	1440
	21st to end	Night	38% 8% 15% 21% 15% 4	1440
July	1st to 10th	Night	31% 7% 15% 26% 17% 5%	1400
	11th to 20th	Night	28% 6% 13% 28% 23% 2	1392
	21st to end	Night	26% 8% 17% 27% 18% 5%	1487
August	1st to 10th	Night	28% 7% 16% 30% 18% 2	1563
	11th to 20th	Night	28% 7% 17% 24% 21% 3	1706
	21st to end	Night	29% 7% 12% 25% 22% 6%	1980
September	1st to 10th	Night	32% 6% 14% 23% 19% 6%	1800
	11th to 20th	Night	28% 6% 9% 28% 26% 4	1948
	21st to end	Night	34% 6% 11% 26% 20% 3	1980
October	1st to 10th	Night	35% 6% 10% 27% 21% 1	1980
	11th to 20th	Night	41% 4 10% 26% 18% 2	2173
	21st to end	Night	49% 4 10% 22% 13% 2	2574
November	1st to 10th	Night	40% 5% 10% 24% 18% 3	2406
	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	24% 17% 37% 20% 2	255
	11th to 20th	Day	24% 12% 36% 21% 8%	312
	21st to end	Day	30% 13% 30% 19% 7% 1	462
April	1st to 10th	Day	22% 12% 32% 23% 8% 2	420
	11th to 20th	Day	21% 12% 34% 17% 12% 4	412
	21st to end	Day	25% 14% 29% 21% 9% 3	420
May	1st to 10th	Day	24% 11% 28% 25% 9% 4	423
	11th to 20th	Day	22% 7% 28% 22% 15% 5%	447
	21st to end	Day	14% 5% 28% 26% 18% 9%	679
June	1st to 10th	Day	11% 6% 27% 29% 20% 7%	630
	11th to 20th	Day	12% 7% 23% 32% 20% 6%	630
	21st to end	Day	13% 7% 28% 30% 16% 6%	630
July	1st to 10th	Day	10% 2 18% 28% 23% 19%	621
	11th to 20th	Day	10% 2 23% 29% 23% 13%	618
	21st to end	Day	10% 4 20% 32% 24% 10%	684
August	1st to 10th	Day	9% 2 16% 28% 31% 14%	482
	11th to 20th	Day	10% 3 21% 27% 26% 14%	439
	21st to end	Day	11% 2 17% 31% 26% 13%	495
September	1st to 10th	Day	11% 5% 19% 29% 26% 9%	450
	11th to 20th	Day	11% 3 16% 26% 29% 16%	450
	21st to end	Day	11% 10% 20% 24% 25% 9%	450
October	1st to 10th	Day	16% 4 27% 28% 19% 6%	450
	11th to 20th	Day	21% 19% 27% 24% 9%	307
	21st to end	Day	33% 11% 36% 15% 4 1	297
November	1st to 10th	Day	12% 11% 37% 23% 12% 4	270
	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	20% 13% 36% 25% 5%	743
	11th to 20th	Night	20% 9% 39% 26% 6%	720
	21st to end	Night	24% 10% 34% 26% 6%	653
April	1st to 10th	Night	19% 11% 38% 25% 7%	540
	11th to 20th	Night	23% 8% 34% 27% 7% 1	533
	21st to end	Night	22% 9% 33% 27% 8%	540
May	1st to 10th	Night	21% 6% 34% 30% 8% 1	540
	11th to 20th	Night	21% 5% 26% 32% 15% 1	531
	21st to end	Night	13% 3 24% 40% 20% 1	584
June	1st to 10th	Night	11% 2 24% 46% 17%	540
	11th to 20th	Night	11% 2 26% 41% 19% 1	540
	21st to end	Night	12% 3 22% 40% 22% 1	540
July	1st to 10th	Night	8% 2 14% 41% 29% 6%	525
	11th to 20th	Night	10% 2 16% 40% 29% 4	522
	21st to end	Night	7% 2 13% 47% 30% 1	591
August	1st to 10th	Night	7% 1 10% 47% 31% 5%	537
	11th to 20th	Night	8% 1 13% 43% 31% 3	534
	21st to end	Night	9% 2 15% 36% 34% 4	594
September	1st to 10th	Night	13% 2 14% 40% 27% 4	540
	11th to 20th	Night	11% 4 16% 36% 30% 3	688
	21st to end	Night	12% 5% 23% 31% 26% 3	720
October	1st to 10th	Night	14% 5% 24% 36% 19% 2	720
	11th to 20th	Night	20% 13% 29% 29% 8%	720
	21st to end	Night	25% 13% 30% 25% 7%	792
November	1st to 10th	Night	17% 11% 36% 26% 10% 1	740
	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 2024-03-03 05:28:57. Version ac07

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