Cripple Creek KOA
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Cripple Creek KOA clear sky chart from 2005-11-05 to 2017-09-19.

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
40%
15905
26%
46890
13%
15860
53%
15860
31%
26129

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
30%
900
30%
2506
11%
895
49%
895
31%
1305
January16th to endNight
28%
780
34%
2508
14%
780
51%
780
32%
1226
February1st to 15thNight
22%
702
27%
2232
8%
699
44%
699
26%
1183
February16th to endNight
22%
632
35%
1894
8%
632
50%
632
28%
1001
March1st to 15thNight
30%
720
27%
2109
9%
720
45%
720
29%
1159
March16th to endNight
32%
681
28%
2025
11%
681
48%
681
30%
1117
April1st to 15thNight
31%
539
24%
1798
10%
539
48%
539
26%
956
April16th to endNight
28%
540
21%
1800
10%
540
44%
540
22%
1068
May1st to 15thNight
37%
540
19%
1656
12%
540
46%
540
24%
1065
May16th to endNight
40%
562
16%
1498
7%
561
49%
561
31%
950
June1st to 15thNight
54%
540
21%
1440
13%
540
61%
540
42%
800
June16th to endNight
62%
540
23%
1440
17%
540
67%
540
40%
834
July1st to 15thNight
59%
510
15%
1360
12%
510
61%
510
28%
916
July16th to endNight
66%
564
16%
1473
16%
531
67%
531
29%
955
August1st to 15thNight
61%
539
14%
1686
14%
536
62%
536
25%
1051
August16th to endNight
65%
573
22%
1910
23%
573
67%
573
29%
1131
September1st to 15thNight
61%
540
24%
1800
22%
540
67%
540
31%
1041
September16th to endNight
58%
504
33%
1810
27%
504
68%
504
39%
865
October1st to 15thNight
46%
646
30%
1966
16%
646
59%
646
39%
1046
October16th to endNight
47%
718
35%
2126
17%
718
59%
718
39%
1103
November1st to 15thNight
40%
875
34%
2275
15%
875
51%
875
43%
1216
November16th to endNight
38%
900
36%
2370
13%
900
54%
900
42%
1233
December1st to 15thNight
26%
900
25%
2520
6%
900
42%
900
29%
1393
December16th to endNight
24%
960
27%
2688
7%
960
41%
960
26%
1515

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
5%6%36%5%35%5%5%7%45%
47933
Night
35%25%42445%7%53%
47068
Cloud CoverDay
5%7%36%5%35%5%5%7%45%
47931
Night
35%25%42445%7%53%
47068
TransparencyDay
34%411%23%20%6%
47613
Night
28%411%27%21%6%
46890
SeeingDay
15%17%28%21%12%4
5811
Night
8%17%26%26%16%3
15908

By Month

Percentage Cloud Cover SW (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
15%24324348%58%
1432
16th to endDay
15%35%322447%59%
1727
February1st to 15thDay
16%36%43446%8%50%
1630
16th to endDay
6%36%42445%7%53%
1580
March1st to 15thDay
27%47%6%3435%7%46%
1848
16th to endDay
39%36%5%345%6%8%42%
2199
April1st to 15thDay
48%37%7%4445%7%42%
2150
16th to endDay
6%14%47%5%3445%6%35%
2160
May1st to 15thDay
10%9%48%5%36%5%6%6%32%
2290
16th to endDay
6%7%37%6%46%6%5%8%38%
2616
June1st to 15thDay
5%5%35%436%6%7%8%43%
2520
16th to endDay
33245%36%6%7%8%47%
2520
July1st to 15thDay
9%436%7%47%6%7%7%35%
2520
16th to endDay
7%7%36%7%5%8%7%7%8%30%
2591
August1st to 15thDay
9%7%38%7%46%6%5%7%32%
2263
16th to endDay
7%5%26%6%45%6%6%10%37%
2292
September1st to 15thDay
8%5%27%6%45%5%6%6%41%
2160
16th to endDay
6%325%423335%59%
1893
October1st to 15thDay
4325%4335%5%7%53%
1661
16th to endDay
46%23213335%61%
1735
November1st to 15thDay
15%25%323448%59%
1583
16th to endDay
1324424437%62%
1587
December1st to 15thDay
435%424447%56%
1440
16th to endDay
15%26%5%25%5%6%7%50%
1536
January1st to 15thNight
315%32445%7%60%
2506
16th to endNight
1424323345%64%
2508
February1st to 15thNight
16%35%5%23348%55%
2222
16th to endNight
5%25%423446%59%
1894
March1st to 15thNight
15%25%42445%7%54%
2109
16th to endNight
36%35%424347%53%
2025
April1st to 15thNight
37%3443345%6%53%
1798
16th to endNight
6%10%36%5%24347%44%
1800
May1st to 15thNight
9%9%37%5%25%5%5%6%39%
1655
16th to endNight
6%6%26%6%25%5%5%8%44%
1497
June1st to 15thNight
33233245%5%9%54%
1440
16th to endNight
2314425%5%7%7%54%
1440
July1st to 15thNight
8%6%36%6%36%6%7%7%36%
1440
16th to endNight
5%5%36%5%47%7%8%10%34%
1574
August1st to 15thNight
7%5%36%6%46%6%7%6%39%
1695
16th to endNight
7%425%6%45%6%6%9%40%
1910
September1st to 15thNight
7%425%6%345%7%8%43%
1800
16th to endNight
4414423346%59%
1810
October1st to 15thNight
4413324447%59%
1966
16th to endNight
44133345%4460%
2126
November1st to 15thNight
1423423448%60%
2275
16th to endNight
1413323347%64%
2370
December1st to 15thNight
1325%5%2445%10%54%
2520
16th to endNight
1436%42445%8%53%
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
15%24324448%57%
1432
16th to endDay
16%36%213447%59%
1727
February1st to 15thDay
17%37%42436%9%50%
1630
16th to endDay
6%37%43435%7%53%
1580
March1st to 15thDay
29%47%6%2435%7%47%
1848
16th to endDay
39%5%6%425%45%9%42%
2197
April1st to 15thDay
49%47%5%35%5%47%42%
2150
16th to endDay
7%15%5%6%5%2445%6%35%
2160
May1st to 15thDay
11%11%47%5%26%5%6%6%32%
2290
16th to endDay
7%8%36%5%35%5%6%7%38%
2616
June1st to 15thDay
6%6%35%5%35%6%7%8%43%
2520
16th to endDay
4424435%6%7%8%47%
2520
July1st to 15thDay
10%5%36%6%47%6%6%7%35%
2520
16th to endDay
9%7%36%7%5%7%7%7%7%31%
2591
August1st to 15thDay
10%8%37%7%45%6%6%7%32%
2263
16th to endDay
8%6%36%6%35%6%6%9%38%
2292
September1st to 15thDay
9%6%36%5%345%5%6%42%
2160
16th to endDay
7%424423335%59%
1893
October1st to 15thDay
5%416%42445%7%53%
1661
16th to endDay
46%24313335%61%
1735
November1st to 15thDay
16%25%223448%58%
1583
16th to endDay
1325%314447%61%
1587
December1st to 15thDay
1436%424348%56%
1440
16th to endDay
15%26%4345%5%7%50%
1536
January1st to 15thNight
325%42445%7%60%
2506
16th to endNight
1424313336%64%
2508
February1st to 15thNight
16%35%424349%54%
2222
16th to endNight
6%25%333446%59%
1894
March1st to 15thNight
15%3443445%7%54%
2109
16th to endNight
36%35%423347%54%
2025
April1st to 15thNight
38%3432345%5%54%
1798
16th to endNight
7%9%36%5%23447%44%
1800
May1st to 15thNight
9%9%47%5%25%5%46%40%
1655
16th to endNight
6%6%36%6%245%49%43%
1497
June1st to 15thNight
3413325%45%10%54%
1440
16th to endNight
2214435%5%6%8%55%
1440
July1st to 15thNight
9%6%26%6%36%5%6%8%37%
1440
16th to endNight
6%5%35%6%47%7%7%11%34%
1574
August1st to 15thNight
8%5%36%5%5%5%6%6%7%39%
1695
16th to endNight
7%5%25%5%35%5%6%9%41%
1910
September1st to 15thNight
8%4246%35%5%7%8%43%
1800
16th to endNight
45%14423346%59%
1810
October1st to 15thNight
5%413324446%59%
1966
16th to endNight
442333344460%
2126
November1st to 15thNight
1423423448%61%
2275
16th to endNight
1413313347%63%
2370
December1st to 15thNight
1325%43445%10%54%
2520
16th to endNight
15%37%5%2345%8%52%
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
24%213%32%22%5%
1433
16th to endDay
23%211%30%22%8%
1727
February1st to 15thDay
29%311%31%17%5%
1631
16th to endDay
27%27%29%26%6%
1580
March1st to 15thDay
34%28%25%22%6%
1848
16th to endDay
35%49%26%20%3
2199
April1st to 15thDay
38%39%24%17%6%
2150
16th to endDay
46%49%21%15%3
2160
May1st to 15thDay
48%5%12%18%14%1
2290
16th to endDay
39%6%14%20%14%5%
2620
June1st to 15thDay
33%6%12%18%18%10%
2520
16th to endDay
28%5%10%22%23%10%
2520
July1st to 15thDay
41%5%12%18%15%6%
2371
16th to endDay
43%7%16%19%11%2
2429
August1st to 15thDay
46%5%12%16%13%5%
2248
16th to endDay
37%5%12%22%17%3
2292
September1st to 15thDay
38%411%20%19%7%
2160
16th to endDay
25%28%27%29%6%
1893
October1st to 15thDay
25%48%26%28%6%
1661
16th to endDay
24%25%28%30%7%
1735
November1st to 15thDay
22%39%23%26%13%
1583
16th to endDay
20%26%27%32%10%
1587
December1st to 15thDay
25%414%28%21%4
1440
16th to endDay
29%5%15%25%18%6%
1536
January1st to 15thNight
22%212%30%25%5%
2506
16th to endNight
21%310%28%26%8%
2508
February1st to 15thNight
28%210%36%17%4
2232
16th to endNight
24%35%31%27%7%
1894
March1st to 15thNight
26%48%28%27%4
2109
16th to endNight
27%410%29%24%4
2025
April1st to 15thNight
29%312%28%20%6%
1798
16th to endNight
38%311%27%15%4
1800
May1st to 15thNight
42%412%22%15%2
1656
16th to endNight
36%5%15%23%13%6%
1498
June1st to 15thNight
25%417%22%15%14%
1440
16th to endNight
27%6%9%23%20%13%
1440
July1st to 15thNight
42%5%13%19%11%6%
1360
16th to endNight
37%8%18%23%10%1
1473
August1st to 15thNight
40%6%16%19%11%5%
1686
16th to endNight
35%6%13%25%15%3
1910
September1st to 15thNight
33%5%14%22%15%7%
1800
16th to endNight
24%38%31%26%5%
1810
October1st to 15thNight
25%410%23%27%8%
1966
16th to endNight
24%35%28%30%7%
2126
November1st to 15thNight
21%39%27%25%13%
2275
16th to endNight
19%28%28%30%10%
2370
December1st to 15thNight
25%415%29%19%5%
2520
16th to endNight
27%415%24%21%5%
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
22%23%23%16%12%2
90
16th to endDay
7%23%37%20%9%1
96
February1st to 15thDay
17%44%26%10%1
90
16th to endDay
13%35%23%19%33
81
March1st to 15thDay
22%26%34%12%3
138
16th to endDay
25%29%34%7%2
288
April1st to 15thDay
22%32%30%9%4
269
16th to endDay
35%26%25%10%2
270
May1st to 15thDay
16%18%34%23%42
399
16th to endDay
13%18%29%22%11%3
517
June1st to 15thDay
9%16%28%23%16%5%
495
16th to endDay
5%11%31%24%19%7%
495
July1st to 15thDay
14%6%21%24%23%9%
475
16th to endDay
11%420%30%22%10%
450
August1st to 15thDay
20%7%26%28%11%5%
315
16th to endDay
14%8%28%29%15%3
332
September1st to 15thDay
12%15%35%21%9%4
315
16th to endDay
11%17%31%21%11%6%
144
October1st to 15thDay
5%20%23%27%13%10%
90
16th to endDay
13%16%25%33%7%4
96
November1st to 15thDay
8%16%26%22%17%7%
90
16th to endDay
16%31%32%14%41
90
December1st to 15thDay
13%41%33%8%3
90
16th to endDay
12%44%25%12%5%
96
January1st to 15thNight
9%25%29%20%11%3
900
16th to endNight
7%26%32%23%8%2
780
February1st to 15thNight
7%27%37%22%5%
704
16th to endNight
6%31%33%21%5%
632
March1st to 15thNight
5%26%30%25%8%2
720
16th to endNight
8%23%30%28%7%
681
April1st to 15thNight
12%23%28%26%7%
539
16th to endNight
13%19%30%25%9%1
540
May1st to 15thNight
13%12%27%32%12%1
540
16th to endNight
10%11%27%30%17%2
563
June1st to 15thNight
6%7%24%36%19%4
540
16th to endNight
45%20%36%29%4
540
July1st to 15thNight
9%49%30%39%6%
510
16th to endNight
6%35%27%45%10%
564
August1st to 15thNight
10%49%28%38%8%
539
16th to endNight
9%38%29%39%9%
573
September1st to 15thNight
9%5%14%31%31%8%
540
16th to endNight
8%7%20%29%25%8%
504
October1st to 15thNight
7%14%27%28%16%5%
646
16th to endNight
7%15%24%27%18%5%
718
November1st to 15thNight
7%17%29%27%14%3
875
16th to endNight
7%22%30%26%10%3
900
December1st to 15thNight
7%26%34%22%6%2
900
16th to endNight
8%28%32%20%8%1
960
Page generated at 2017-09-20 02:49:49. Version ac04

Copyright 2017 A. Danko


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