Wolf Creek State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Wolf Creek State Park clear sky chart from 2005-11-05 to 2017-10-06.

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 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
41%
15934
20%
47058
13%
15888
48%
15888
26%
30488

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
22%
900
17%
2506
7%
895
32%
895
20%
1802
January16th to endNight
21%
960
16%
2577
5%
960
30%
960
20%
1879
February1st to 15thNight
24%
775
14%
2183
5%
772
30%
772
18%
1570
February16th to endNight
24%
631
19%
1893
8%
631
34%
631
21%
1262
March1st to 15thNight
26%
720
16%
2160
8%
720
32%
720
19%
1529
March16th to endNight
29%
596
16%
2001
10%
596
38%
596
19%
1347
April1st to 15thNight
32%
539
20%
1797
13%
539
44%
539
24%
1106
April16th to endNight
36%
540
20%
1794
15%
540
45%
540
23%
1156
May1st to 15thNight
39%
540
16%
1620
10%
540
46%
540
23%
1108
May16th to endNight
50%
563
19%
1519
12%
561
54%
561
29%
1021
June1st to 15thNight
61%
540
19%
1440
14%
540
65%
540
40%
863
June16th to endNight
59%
540
21%
1440
15%
540
63%
540
37%
885
July1st to 15thNight
68%
510
18%
1360
15%
510
70%
510
39%
826
July16th to endNight
75%
564
27%
1417
21%
531
77%
531
47%
784
August1st to 15thNight
75%
539
23%
1692
23%
536
77%
536
40%
917
August16th to endNight
73%
573
24%
1910
26%
573
77%
573
38%
1033
September1st to 15thNight
62%
540
28%
1800
28%
540
67%
540
34%
996
September16th to endNight
62%
711
32%
1974
25%
711
67%
711
38%
1157
October1st to 15thNight
54%
684
29%
1971
21%
684
61%
684
35%
1168
October16th to endNight
33%
704
24%
2195
15%
704
43%
704
26%
1355
November1st to 15thNight
39%
700
27%
2276
18%
700
51%
700
29%
1318
November16th to endNight
30%
720
21%
2340
14%
720
39%
720
22%
1511
December1st to 15thNight
25%
885
14%
2505
7%
885
31%
885
18%
1828
December16th to endNight
20%
960
13%
2688
4%
960
28%
960
15%
2067

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
13%6%35%5%3445%8%39%
48149
Night
13%6%35%424446%42%
47227
Cloud CoverDay
13%6%35%5%3445%8%39%
48157
Night
13%6%35%424446%42%
47232
TransparencyDay
42%6%12%23%13%2
47835
Night
41%5%11%23%15%3
47059
SeeingDay
14%5%22%27%21%8%
5957
Night
17%8%27%30%15%1
15934

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
16%11%49%7%45%435%25%
1432
16th to endDay
13%12%5%7%6%33446%32%
1647
February1st to 15thDay
13%10%5%9%6%44447%29%
1678
16th to endDay
13%11%5%7%7%25%5%5%6%29%
1580
March1st to 15thDay
17%10%46%5%24446%33%
1790
16th to endDay
18%10%46%5%35%447%31%
2232
April1st to 15thDay
17%6%35%5%25%347%38%
2151
16th to endDay
18%7%26%434346%37%
2166
May1st to 15thDay
20%6%25%5%3445%7%33%
2331
16th to endDay
11%6%35%5%35%5%6%8%38%
2594
June1st to 15thDay
7%4145%35%6%6%9%44%
2520
16th to endDay
8%425%5%35%5%7%9%42%
2520
July1st to 15thDay
9%424435%6%6%10%41%
2520
16th to endDay
5%2145%26%7%7%12%43%
2655
August1st to 15thDay
8%314425%5%6%11%45%
2256
16th to endDay
7%3245%345%7%8%45%
2292
September1st to 15thDay
12%5%26%43445%7%44%
2154
16th to endDay
10%414425%45%7%49%
1980
October1st to 15thDay
14%5%14323448%46%
1786
16th to endDay
14%6%25%41335%5%46%
1675
November1st to 15thDay
14%5%23323347%49%
1582
16th to endDay
18%7%44413346%40%
1620
December1st to 15thDay
20%12%5%6%433446%27%
1452
16th to endDay
20%12%5%6%424445%26%
1536
January1st to 15thNight
15%8%47%5%35%435%35%
2506
16th to endNight
14%10%5%7%5%34336%33%
2577
February1st to 15thNight
16%9%5%7%5%245%46%32%
2181
16th to endNight
16%8%36%5%23446%38%
1893
March1st to 15thNight
18%9%46%424445%35%
2147
16th to endNight
16%8%36%42445%7%36%
2001
April1st to 15thNight
14%7%25%424336%45%
1797
16th to endNight
17%6%35%5%24445%41%
1794
May1st to 15thNight
19%435%5%2435%7%38%
1620
16th to endNight
9%5%26%5%36%5%5%6%43%
1518
June1st to 15thNight
7%3244145%6%9%49%
1440
16th to endNight
8%43442446%9%47%
1440
July1st to 15thNight
8%41343445%8%49%
1440
16th to endNight
422432446%8%56%
1513
August1st to 15thNight
6%3133246%7%10%51%
1701
16th to endNight
5%313335%5%6%7%53%
1910
September1st to 15thNight
10%5%24424347%52%
1800
16th to endNight
8%414423447%54%
1974
October1st to 15thNight
12%314423346%52%
1971
16th to endNight
17%7%24323245%47%
2195
November1st to 15thNight
11%5%24424345%51%
2276
16th to endNight
17%7%44422345%41%
2340
December1st to 15thNight
21%9%36%5%33446%31%
2505
16th to endNight
22%10%5%7%5%2434428%
2688

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
16%11%410%7%45%435%25%
1432
16th to endDay
13%12%5%7%6%33345%31%
1647
February1st to 15thDay
13%10%5%9%6%44447%29%
1678
16th to endDay
13%11%5%7%7%25%5%5%6%29%
1580
March1st to 15thDay
17%10%46%5%24346%33%
1800
16th to endDay
17%10%46%5%34446%31%
2230
April1st to 15thDay
17%6%35%5%25%35%7%37%
2151
16th to endDay
18%7%26%434346%37%
2166
May1st to 15thDay
20%6%25%44445%7%33%
2331
16th to endDay
11%6%35%5%35%5%5%9%38%
2594
June1st to 15thDay
8%3145%35%5%7%9%44%
2520
16th to endDay
8%425%5%35%5%7%10%42%
2520
July1st to 15thDay
9%424435%6%7%10%41%
2520
16th to endDay
5%3145%26%6%7%12%43%
2655
August1st to 15thDay
8%4144345%6%11%44%
2256
16th to endDay
7%415%5%25%5%7%8%45%
2292
September1st to 15thDay
12%426%434447%44%
2154
16th to endDay
10%414425%35%7%49%
1980
October1st to 15thDay
14%5%14323448%46%
1786
16th to endDay
14%6%25%413346%45%
1675
November1st to 15thDay
14%6%23223347%49%
1582
16th to endDay
18%7%44413246%40%
1620
December1st to 15thDay
20%12%5%6%433446%27%
1452
16th to endDay
20%12%5%6%435%45%5%26%
1536
January1st to 15thNight
15%8%47%5%44445%35%
2506
16th to endNight
14%11%5%7%5%34336%33%
2577
February1st to 15thNight
16%9%6%6%5%24446%32%
2174
16th to endNight
16%8%36%423346%38%
1893
March1st to 15thNight
18%9%46%424445%34%
2160
16th to endNight
16%8%36%42445%7%36%
2001
April1st to 15thNight
14%7%24434336%45%
1797
16th to endNight
17%6%25%5%24345%41%
1794
May1st to 15thNight
19%435%5%2435%7%38%
1619
16th to endNight
9%5%26%5%36%46%6%43%
1518
June1st to 15thNight
7%2144145%6%9%49%
1440
16th to endNight
8%5%2442446%9%47%
1440
July1st to 15thNight
8%41343445%8%50%
1440
16th to endNight
422423346%8%56%
1513
August1st to 15thNight
6%3133246%7%9%52%
1701
16th to endNight
5%3134245%7%7%53%
1910
September1st to 15thNight
9%5%24414347%52%
1800
16th to endNight
8%414423447%54%
1974
October1st to 15thNight
12%314423337%51%
1971
16th to endNight
17%7%24323245%47%
2195
November1st to 15thNight
11%5%25%424345%51%
2276
16th to endNight
17%7%44423345%41%
2340
December1st to 15thNight
21%9%36%5%24346%30%
2505
16th to endNight
22%11%47%5%2434428%
2688

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
59%5%8%16%8%
1433
16th to endDay
52%5%12%21%7%
1647
February1st to 15thDay
52%5%12%20%7%
1680
16th to endDay
53%5%11%21%6%
1580
March1st to 15thDay
50%6%11%22%7%
1800
16th to endDay
52%5%13%22%5%
2232
April1st to 15thDay
44%5%11%24%13%
2151
16th to endDay
47%412%21%10%2
2166
May1st to 15thDay
49%6%13%21%10%
2331
16th to endDay
41%7%14%18%15%2
2598
June1st to 15thDay
32%9%13%24%17%2
2520
16th to endDay
34%7%15%22%16%3
2520
July1st to 15thDay
35%7%13%24%15%3
2371
16th to endDay
28%9%17%27%15%1
2488
August1st to 15thDay
31%7%14%28%15%2
2241
16th to endDay
32%7%13%24%16%5%
2292
September1st to 15thDay
38%5%9%21%20%4
2154
16th to endDay
33%49%27%21%3
1980
October1st to 15thDay
37%311%27%17%2
1786
16th to endDay
38%411%26%17%1
1675
November1st to 15thDay
35%412%22%20%5%
1582
16th to endDay
45%411%24%12%1
1620
December1st to 15thDay
55%6%12%16%9%
1452
16th to endDay
58%5%9%19%6%1
1536
January1st to 15thNight
50%48%22%12%
2506
16th to endNight
52%412%22%8%
2577
February1st to 15thNight
52%412%19%10%
2183
16th to endNight
47%312%25%10%
1893
March1st to 15thNight
51%5%9%20%11%1
2160
16th to endNight
47%5%12%23%10%1
2001
April1st to 15thNight
40%49%25%17%2
1797
16th to endNight
44%49%21%15%3
1794
May1st to 15thNight
45%6%12%22%12%
1620
16th to endNight
38%9%13%17%17%4
1520
June1st to 15thNight
28%6%14%26%20%3
1440
16th to endNight
32%6%11%23%19%6%
1440
July1st to 15thNight
30%5%13%26%17%5%
1360
16th to endNight
23%5%15%31%20%2
1417
August1st to 15thNight
24%7%15%25%22%3
1692
16th to endNight
26%7%12%25%20%6%
1910
September1st to 15thNight
31%47%26%21%7%
1800
16th to endNight
30%48%25%25%5%
1974
October1st to 15thNight
32%49%28%19%5%
1971
16th to endNight
39%38%27%17%3
2195
November1st to 15thNight
34%48%23%21%7%
2276
16th to endNight
44%410%23%16%
2340
December1st to 15thNight
53%411%18%11%
2505
16th to endNight
58%410%16%8%1
2688

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%11%37%16%5%
90
16th to endDay
11%18%41%25%3
96
February1st to 15thDay
15%23%40%20%1
90
16th to endDay
16%14%33%28%7%
81
March1st to 15thDay
30%13%35%16%4
90
16th to endDay
22%16%31%20%8%1
225
April1st to 15thDay
19%12%31%21%14%
270
16th to endDay
24%426%29%10%5%
270
May1st to 15thDay
20%9%28%25%11%5%
288
16th to endDay
13%430%28%16%6%
494
June1st to 15thDay
9%319%31%29%6%
495
16th to endDay
10%429%30%17%7%
495
July1st to 15thDay
14%15%34%23%11%
475
16th to endDay
4211%30%34%16%
515
August1st to 15thDay
11%8%25%35%19%
373
16th to endDay
8%112%25%37%14%
332
September1st to 15thDay
12%213%25%31%14%
315
16th to endDay
10%214%25%29%16%
314
October1st to 15thDay
14%5%21%26%24%6%
187
16th to endDay
16%433%36%6%3
96
November1st to 15thDay
11%5%20%28%22%12%
90
16th to endDay
35%15%23%17%7%
90
December1st to 15thDay
18%10%37%23%5%4
90
16th to endDay
29%14%44%10%1
96
January1st to 15thNight
18%16%37%23%3
900
16th to endNight
19%12%39%25%3
960
February1st to 15thNight
20%14%34%28%3
775
16th to endNight
21%12%35%28%2
631
March1st to 15thNight
23%10%34%26%4
720
16th to endNight
20%8%35%25%9%
596
April1st to 15thNight
17%12%32%27%9%
539
16th to endNight
20%6%30%29%11%1
540
May1st to 15thNight
20%5%28%32%12%1
540
16th to endNight
12%327%33%21%2
563
June1st to 15thNight
9%220%41%25%
540
16th to endNight
10%120%41%25%
540
July1st to 15thNight
10%112%36%35%2
510
16th to endNight
4111%38%38%5%
564
August1st to 15thNight
7%10%38%38%5%
539
16th to endNight
6%12%34%40%5%
573
September1st to 15thNight
12%213%34%32%4
540
16th to endNight
9%316%32%31%6%
711
October1st to 15thNight
13%6%20%34%20%3
684
16th to endNight
21%10%29%27%10%
704
November1st to 15thNight
11%9%34%30%13%
700
16th to endNight
23%11%30%25%9%
720
December1st to 15thNight
26%9%32%23%7%
885
16th to endNight
28%10%32%24%3
960
Page generated at 2017-10-07 13:07:43. Version ac04

Copyright 2017 A. Danko


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