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 2005-11-05 to 2018-01-20.

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 TypeMinimum conditions for hour to be usableOut of hours
Clear of CloudsTransparencySeeingSky Brightness
Planetary:50%(no limit)Average(no limit)Nighttime Hours
Deep Sky:70%Average(no limit)5.9Nighttime Hours
CCD Imaging:70%Below AveragePoor(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

PlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
Night
38%
16461
17%
48443
11%
16419
44%
16419
23%
32738

By Month

MonthDays of MonthPlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
January1st to 15thNight
17%
975
12%
2716
5%
970
24%
970
16%
2053
January16th to endNight
19%
985
12%
2752
4%
985
26%
985
16%
2078
February1st to 15thNight
22%
731
12%
2142
3%
731
28%
731
17%
1541
February16th to endNight
24%
631
15%
1893
6%
631
32%
631
17%
1368
March1st to 15thNight
25%
720
12%
2160
8%
720
29%
720
17%
1578
March16th to endNight
30%
675
16%
2031
8%
675
38%
675
21%
1411
April1st to 15thNight
29%
539
14%
1797
8%
539
38%
539
20%
1207
April16th to endNight
32%
540
20%
1707
11%
540
42%
540
23%
1133
May1st to 15thNight
35%
540
14%
1620
8%
540
42%
540
20%
1147
May16th to endNight
52%
562
16%
1551
11%
561
56%
561
30%
1003
June1st to 15thNight
54%
540
16%
1440
10%
540
59%
540
37%
880
June16th to endNight
55%
540
16%
1440
10%
540
59%
540
31%
938
July1st to 15thNight
63%
510
17%
1360
13%
510
65%
510
38%
826
July16th to endNight
69%
564
21%
1417
17%
531
71%
531
41%
840
August1st to 15thNight
75%
539
21%
1597
21%
536
75%
536
40%
890
August16th to endNight
67%
573
20%
1910
20%
573
72%
573
32%
1095
September1st to 15thNight
63%
579
27%
1839
25%
579
68%
579
35%
1058
September16th to endNight
62%
717
29%
1980
23%
717
66%
717
38%
1164
October1st to 15thNight
50%
720
25%
2013
20%
720
56%
720
33%
1247
October16th to endNight
31%
768
20%
2472
12%
768
40%
768
21%
1617
November1st to 15thNight
32%
760
22%
2471
16%
760
43%
760
24%
1559
November16th to endNight
27%
780
18%
2535
11%
780
36%
780
17%
1732
December1st to 15thNight
21%
933
11%
2688
5%
933
27%
933
15%
2002
December16th to endNight
17%
1040
10%
2912
2%
1040
23%
1040
11%
2371

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 ForecastData
Points
Cloud CoverDay
14%7%36%5%3445%7%36%
49087
Night
15%8%36%5%24446%39%
48611
Cloud CoverDay
15%7%36%5%3445%7%36%
49096
Night
15%8%35%5%34446%39%
48616
TransparencyDay
46%6%12%20%12%1
48773
Night
45%5%12%21%13%2
48443
SeeingDay
16%6%26%24%18%7%
6320
Night
19%8%28%29%13%1
16465

By Month

Percentage Cloud Cover NE (2006-)
Color Meanings:
Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
18%16%5%7%6%34445%23%
1552
16th to endDay
14%15%8%8%434345%26%
1574
February1st to 15thDay
16%13%5%8%6%34446%27%
1718
16th to endDay
16%11%6%8%6%33345%30%
1580
March1st to 15thDay
19%11%5%7%5%15%445%28%
1790
16th to endDay
19%8%36%6%3445%6%29%
2202
April1st to 15thDay
19%9%35%434445%35%
2151
16th to endDay
20%7%35%434447%35%
2253
May1st to 15thDay
20%7%36%43446%7%30%
2331
16th to endDay
12%6%26%5%25%5%5%8%38%
2561
June1st to 15thDay
11%425%5%35%6%6%7%42%
2520
16th to endDay
9%5%25%6%35%6%6%8%39%
2520
July1st to 15thDay
9%5%245%35%6%6%8%43%
2520
16th to endDay
6%325%5%46%5%7%10%42%
2655
August1st to 15thDay
7%335%6%35%5%6%7%45%
2349
16th to endDay
9%5%245%35%5%5%9%42%
2292
September1st to 15thDay
12%3244345%6%7%44%
2109
16th to endDay
9%5%15%5%35%45%9%44%
1980
October1st to 15thDay
16%6%25%32345%7%40%
1944
16th to endDay
20%5%26%5%4445%5%35%
1751
November1st to 15thDay
17%7%25%42325%5%43%
1717
16th to endDay
18%9%25%5%24346%35%
1755
December1st to 15thDay
19%11%48%7%34446%27%
1599
16th to endDay
22%15%5%8%424445%21%
1664
January1st to 15thNight
20%12%48%5%23345%29%
2716
16th to endNight
14%12%6%9%6%24445%28%
2752
February1st to 15thNight
17%12%45%6%23336%33%
2140
16th to endNight
16%11%47%434346%32%
1893
March1st to 15thNight
17%12%46%5%2444432%
2147
16th to endNight
16%7%36%5%2445%7%35%
2031
April1st to 15thNight
17%7%35%434437%36%
1797
16th to endNight
18%7%25%5%24346%39%
1707
May1st to 15thNight
20%7%345%25%5%5%6%34%
1620
16th to endNight
10%5%25%5%345%47%45%
1549
June1st to 15thNight
10%41343345%8%49%
1440
16th to endNight
9%425%5%35%5%5%9%44%
1440
July1st to 15thNight
7%32442445%9%51%
1440
16th to endNight
6%22442345%9%52%
1513
August1st to 15thNight
5%3144235%6%9%52%
1606
16th to endNight
9%3144335%6%7%50%
1910
September1st to 15thNight
12%314323346%52%
1839
16th to endNight
8%41442445%8%51%
1980
October1st to 15thNight
14%5%24323345%49%
2013
16th to endNight
18%7%35%432345%40%
2472
November1st to 15thNight
14%8%34423446%42%
2471
16th to endNight
18%9%35%5%23445%35%
2535
December1st to 15thNight
19%11%6%8%42334430%
2688
16th to endNight
23%13%48%6%3443422%
2912

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
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
18%16%5%7%6%34445%23%
1552
16th to endDay
14%15%7%8%43435%6%26%
1574
February1st to 15thDay
16%13%5%8%6%34345%27%
1718
16th to endDay
16%11%6%8%5%33346%29%
1580
March1st to 15thDay
20%11%5%7%5%25%445%28%
1800
16th to endDay
19%8%36%6%44446%30%
2201
April1st to 15thDay
19%9%35%42445%5%34%
2151
16th to endDay
20%7%35%433447%35%
2253
May1st to 15thDay
20%7%36%43445%7%30%
2331
16th to endDay
13%6%25%5%25%45%7%39%
2561
June1st to 15thDay
11%425%4346%6%7%42%
2520
16th to endDay
10%5%25%6%45%6%6%9%38%
2520
July1st to 15thDay
9%4145%35%6%5%8%43%
2520
16th to endDay
7%325%5%36%6%7%10%42%
2655
August1st to 15thDay
7%425%6%35%5%7%6%45%
2349
16th to endDay
10%4245%26%5%5%9%42%
2292
September1st to 15thDay
12%4244345%5%7%44%
2109
16th to endDay
8%5%25%5%345%6%8%44%
1980
October1st to 15thDay
16%6%25%3245%47%40%
1944
16th to endDay
20%5%26%5%3445%5%34%
1751
November1st to 15thDay
17%7%2442335%5%43%
1717
16th to endDay
18%9%346%24446%35%
1755
December1st to 15thDay
19%11%48%6%34445%27%
1599
16th to endDay
22%15%5%8%5%23445%21%
1664
January1st to 15thNight
20%12%48%5%23345%29%
2716
16th to endNight
14%12%6%9%6%33435%28%
2752
February1st to 15thNight
17%11%45%6%23335%34%
2133
16th to endNight
16%12%47%433346%32%
1893
March1st to 15thNight
18%11%46%5%25%445%31%
2160
16th to endNight
16%7%36%5%3446%7%35%
2031
April1st to 15thNight
17%7%345%34447%36%
1797
16th to endNight
18%6%25%5%24346%39%
1707
May1st to 15thNight
20%7%25%5%345%5%6%33%
1619
16th to endNight
10%5%25%5%25%447%45%
1549
June1st to 15thNight
10%42343345%8%49%
1440
16th to endNight
10%325%5%35%5%5%9%44%
1440
July1st to 15thNight
7%31442445%9%51%
1440
16th to endNight
7%2245%2345%9%52%
1513
August1st to 15thNight
5%3144236%5%10%52%
1606
16th to endNight
9%3144245%5%7%50%
1910
September1st to 15thNight
12%31442335%6%52%
1839
16th to endNight
8%42432445%8%51%
1980
October1st to 15thNight
14%5%14323246%49%
2013
16th to endNight
19%7%25%433345%40%
2472
November1st to 15thNight
15%7%24433447%42%
2471
16th to endNight
18%9%35%433446%35%
2535
December1st to 15thNight
19%12%5%8%42334430%
2688
16th to endNight
23%13%48%6%35%43422%
2912

Transparency (when cloud cover <= 30%)
Color Meanings:
Too cloudy to forecast Poor Below Average Average Above average Transparent
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
62%411%14%7%
1553
16th to endDay
59%415%14%5%
1574
February1st to 15thDay
58%5%11%16%7%1
1720
16th to endDay
55%5%12%19%5%
1580
March1st to 15thDay
58%5%12%17%6%
1800
16th to endDay
54%6%12%20%41
2202
April1st to 15thDay
50%5%10%20%12%
2151
16th to endDay
47%5%12%19%10%4
2253
May1st to 15thDay
51%6%12%21%7%
2331
16th to endDay
42%7%12%20%15%2
2565
June1st to 15thDay
37%7%11%22%18%2
2520
16th to endDay
38%8%14%18%16%2
2520
July1st to 15thDay
38%7%12%22%16%3
2371
16th to endDay
34%8%16%25%12%2
2488
August1st to 15thDay
35%6%14%23%16%1
2334
16th to endDay
36%7%12%21%15%4
2292
September1st to 15thDay
36%5%12%23%16%4
2109
16th to endDay
34%5%12%25%20%2
1980
October1st to 15thDay
42%5%10%23%16%1
1944
16th to endDay
49%5%11%21%10%
1751
November1st to 15thDay
42%412%22%14%3
1717
16th to endDay
49%414%22%7%
1755
December1st to 15thDay
58%411%18%6%
1599
16th to endDay
65%6%11%11%4
1664
January1st to 15thNight
57%311%15%10%
2716
16th to endNight
57%414%16%7%
2752
February1st to 15thNight
53%5%13%18%8%1
2142
16th to endNight
53%413%19%8%
1893
March1st to 15thNight
54%5%11%17%9%2
2160
16th to endNight
47%6%14%20%8%1
2031
April1st to 15thNight
47%5%12%19%14%1
1797
16th to endNight
45%5%9%21%14%4
1707
May1st to 15thNight
49%6%11%21%10%
1620
16th to endNight
37%6%14%19%18%2
1551
June1st to 15thNight
32%413%25%21%2
1440
16th to endNight
36%7%13%22%16%3
1440
July1st to 15thNight
29%7%13%25%19%3
1360
16th to endNight
28%6%15%27%19%3
1417
August1st to 15thNight
26%6%17%24%22%2
1597
16th to endNight
30%7%11%22%21%5%
1910
September1st to 15thNight
31%5%10%25%20%6%
1839
16th to endNight
30%5%9%27%23%3
1980
October1st to 15thNight
36%39%26%21%
2013
16th to endNight
45%310%25%12%1
2472
November1st to 15thNight
41%5%9%22%16%3
2471
16th to endNight
50%412%23%9%
2535
December1st to 15thNight
57%312%17%8%
2688
16th to endNight
66%5%9%13%5%
2912

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
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
28%10%34%20%6%
135
16th to endDay
23%11%33%25%3
109
February1st to 15thDay
20%17%46%14%1
90
16th to endDay
22%11%30%20%12%2
81
March1st to 15thDay
30%18%30%17%3
90
16th to endDay
27%8%34%19%9%1
276
April1st to 15thDay
25%10%30%22%10%1
270
16th to endDay
23%7%27%22%13%4
270
May1st to 15thDay
23%10%27%22%11%4
288
16th to endDay
16%6%30%24%17%4
461
June1st to 15thDay
10%5%24%33%20%5%
495
16th to endDay
13%6%31%28%13%6%
495
July1st to 15thDay
13%124%27%20%12%
475
16th to endDay
7%218%29%27%13%
515
August1st to 15thDay
9%113%27%28%18%
337
16th to endDay
14%215%25%26%15%
332
September1st to 15thDay
12%316%25%31%11%
315
16th to endDay
9%413%26%35%9%
314
October1st to 15thDay
20%5%22%25%21%5%
279
16th to endDay
27%11%29%26%6%
144
November1st to 15thDay
14%9%31%20%15%8%
135
16th to endDay
24%13%42%14%5%
135
December1st to 15thDay
20%20%39%13%5%
135
16th to endDay
26%19%40%10%2
144
January1st to 15thNight
25%13%36%19%5%
975
16th to endNight
20%13%36%25%3
985
February1st to 15thNight
22%11%37%24%4
734
16th to endNight
22%10%35%25%5%
631
March1st to 15thNight
25%9%35%24%5%
720
16th to endNight
18%8%37%26%7%
675
April1st to 15thNight
21%9%35%26%6%
539
16th to endNight
21%8%32%26%10%1
540
May1st to 15thNight
24%5%30%30%9%
540
16th to endNight
11%425%38%20%
563
June1st to 15thNight
11%224%45%16%
540
16th to endNight
10%222%42%21%
540
July1st to 15thNight
9%117%43%26%2
510
16th to endNight
7%112%43%32%3
564
August1st to 15thNight
7%7%48%30%4
539
16th to endNight
10%13%35%35%4
573
September1st to 15thNight
13%213%36%29%4
579
16th to endNight
11%317%33%30%3
717
October1st to 15thNight
16%6%21%35%17%1
720
16th to endNight
23%12%30%25%8%
768
November1st to 15thNight
18%9%34%25%11%
760
16th to endNight
22%14%30%23%7%
780
December1st to 15thNight
26%13%31%23%5%
933
16th to endNight
31%10%31%21%4
1040
Page generated at 2018-01-21 11:19:24. Version ac04

Copyright 2018 A. Danko


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