Camp Rock Road
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Camp Rock Road clear sky chart from 2005-11-05 to 2017-04-30.

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
69%
15515
39%
45508
29%
15476
77%
15476
62%
19875

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
66%
716
33%
2327
29%
716
74%
716
49%
1052
January16th to endNight
63%
768
38%
2352
32%
768
73%
768
49%
1116
February1st to 15thNight
62%
699
37%
2108
31%
698
72%
698
53%
980
February16th to endNight
57%
632
36%
1895
31%
632
70%
632
47%
930
March1st to 15thNight
59%
720
34%
2154
27%
720
71%
720
54%
957
March16th to endNight
57%
768
37%
2046
23%
768
70%
768
56%
985
April1st to 15thNight
47%
719
38%
1799
13%
719
62%
719
58%
865
April16th to endNight
53%
716
41%
1790
16%
716
66%
716
66%
822
May1st to 15thNight
56%
498
43%
1487
26%
497
65%
497
68%
585
May16th to endNight
51%
513
35%
1541
17%
513
65%
513
65%
599
June1st to 15thNight
63%
495
37%
1485
25%
495
72%
495
75%
565
June16th to endNight
69%
406
37%
1396
32%
406
76%
406
83%
458
July1st to 15thNight
87%
398
34%
1328
32%
398
90%
398
69%
514
July16th to endNight
85%
522
34%
1467
29%
489
86%
489
62%
644
August1st to 15thNight
91%
657
40%
1640
26%
653
92%
653
82%
728
August16th to endNight
88%
700
41%
1750
27%
700
90%
700
77%
801
September1st to 15thNight
91%
660
42%
1717
33%
660
93%
660
77%
763
September16th to endNight
85%
656
48%
1815
40%
656
92%
656
86%
712
October1st to 15thNight
75%
660
45%
1815
35%
660
84%
660
73%
775
October16th to endNight
78%
704
44%
2145
41%
704
86%
704
67%
870
November1st to 15thNight
76%
700
39%
2275
37%
700
85%
700
65%
912
November16th to endNight
75%
720
42%
2340
41%
720
83%
720
60%
958
December1st to 15thNight
65%
720
35%
2340
32%
720
74%
720
47%
1087
December16th to endNight
59%
768
35%
2496
29%
768
69%
768
44%
1197

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
112212345%73%
46200
Night
111212235%75%
45706
TransparencyDay
12%36%15%27%34%
45895
Night
10%36%16%30%32%
45513
SeeingDay
413%27%33%17%3
5286
Night
27%17%31%31%8%
15526

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
2112323348%66%
1611
16th to endDay
2213223346%65%
1869
February1st to 15thDay
1212313347%69%
1751
16th to endDay
2213323447%64%
1579
March1st to 15thDay
12221225%9%68%
1804
16th to endDay
112214348%69%
2176
April1st to 15thDay
2212213335%72%
2149
16th to endDay
11112126%79%
2150
May1st to 15thDay
122235%79%
2133
16th to endDay
11112235%79%
2221
June1st to 15thDay
11123483%
2145
16th to endDay
11111286%
2225
July1st to 15thDay
211222335%6%67%
2206
16th to endDay
22124245%45%62%
2282
August1st to 15thDay
1122234474%
1980
16th to endDay
11122245%5%71%
2100
September1st to 15thDay
21121234475%
1911
16th to endDay
1111122383%
1815
October1st to 15thDay
11211323476%
1815
16th to endDay
211123481%
1726
November1st to 15thDay
11121232477%
1584
16th to endDay
211223346%72%
1620
December1st to 15thDay
12132233410%63%
1620
16th to endDay
2213313347%64%
1728
January1st to 15thNight
1213313348%66%
2327
16th to endNight
3212323345%67%
2352
February1st to 15thNight
1212323237%69%
2101
16th to endNight
321222346%6%64%
1895
March1st to 15thNight
21121245%8%68%
2154
16th to endNight
112213446%71%
2046
April1st to 15thNight
111122346%74%
1799
16th to endNight
1112145%81%
1790
May1st to 15thNight
12335%81%
1487
16th to endNight
11135%82%
1540
June1st to 15thNight
111112385%
1485
16th to endNight
111389%
1396
July1st to 15thNight
21121213478%
1416
16th to endNight
221221223474%
1575
August1st to 15thNight
11113483%
1650
16th to endNight
1121122481%
1750
September1st to 15thNight
1111223480%
1717
16th to endNight
12389%
1815
October1st to 15thNight
122335%79%
1815
16th to endNight
1211123381%
2145
November1st to 15thNight
1121223479%
2275
16th to endNight
112112236%74%
2340
December1st to 15thNight
22242335%8%63%
2340
16th to endNight
2313323447%64%
2496

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
16%5%8%19%33%17%
1612
16th to endDay
18%5%9%20%28%19%
1869
February1st to 15thDay
14%36%22%27%24%
1751
16th to endDay
16%6%8%20%33%15%
1579
March1st to 15thDay
12%35%22%33%22%
1804
16th to endDay
12%49%23%31%19%
2176
April1st to 15thDay
13%35%16%38%22%
2149
16th to endDay
8%25%19%34%28%
2150
May1st to 15thDay
8%2415%31%36%
2133
16th to endDay
9%2413%39%31%
2224
June1st to 15thDay
5%239%21%56%
2145
16th to endDay
7%12411%72%
2225
July1st to 15thDay
15%36%9%15%49%
2066
16th to endDay
20%46%13%20%34%
2127
August1st to 15thDay
10%3410%17%53%
1966
16th to endDay
12%45%9%24%43%
2100
September1st to 15thDay
12%35%8%21%48%
1911
16th to endDay
7%236%29%50%
1815
October1st to 15thDay
10%3412%32%36%
1815
16th to endDay
8%3312%32%40%
1726
November1st to 15thDay
11%25%16%35%27%
1584
16th to endDay
12%46%19%30%26%
1620
December1st to 15thDay
17%5%10%20%27%18%
1620
16th to endDay
18%7%9%25%23%14%
1728
January1st to 15thNight
16%5%8%19%28%22%
2327
16th to endNight
17%49%19%26%23%
2352
February1st to 15thNight
16%37%20%28%24%
2112
16th to endNight
16%5%8%21%30%16%
1895
March1st to 15thNight
11%49%21%29%22%
2154
16th to endNight
11%5%8%22%34%17%
2046
April1st to 15thNight
11%28%22%34%21%
1799
16th to endNight
6%25%22%37%24%
1790
May1st to 15thNight
5%3418%39%28%
1488
16th to endNight
5%25%20%41%24%
1541
June1st to 15thNight
5%1312%23%53%
1485
16th to endNight
4126%17%68%
1396
July1st to 15thNight
9%249%19%55%
1328
16th to endNight
12%36%15%25%35%
1467
August1st to 15thNight
5%239%25%53%
1640
16th to endNight
8%1310%30%45%
1750
September1st to 15thNight
7%2410%22%52%
1717
16th to endNight
318%32%53%
1815
October1st to 15thNight
7%25%12%35%35%
1815
16th to endNight
8%249%32%42%
2145
November1st to 15thNight
9%35%14%36%29%
2275
16th to endNight
11%26%20%30%28%
2340
December1st to 15thNight
17%5%9%17%30%19%
2340
16th to endNight
18%6%12%22%25%15%
2496

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
7%18%25%38%7%1
90
16th to endDay
5%18%31%32%8%2
237
February1st to 15thDay
421%24%30%16%1
266
16th to endDay
7%27%26%27%10%
238
March1st to 15thDay
7%20%29%27%14%1
270
16th to endDay
8%19%31%26%12%1
288
April1st to 15thDay
10%25%32%18%10%2
269
16th to endDay
7%26%33%22%7%1
267
May1st to 15thDay
321%32%28%10%2
228
16th to endDay
316%33%31%12%2
266
June1st to 15thDay
29%38%32%12%3
255
16th to endDay
2436%32%16%7%
255
July1st to 15thDay
1217%46%26%4
245
16th to endDay
4118%39%28%8%
271
August1st to 15thDay
1318%41%26%9%
255
16th to endDay
1120%38%29%8%
268
September1st to 15thDay
1221%48%23%1
255
16th to endDay
16%26%40%21%2
255
October1st to 15thDay
113%34%34%15%
255
16th to endDay
5%10%20%35%25%2
187
November1st to 15thDay
48%14%27%32%12%
90
16th to endDay
415%22%36%20%1
90
December1st to 15thDay
5%12%25%34%20%2
90
16th to endDay
10%18%22%34%13%
96
January1st to 15thNight
36%17%32%29%10%
720
16th to endNight
47%19%33%26%8%
768
February1st to 15thNight
37%21%32%25%8%
704
16th to endNight
413%22%31%22%5%
632
March1st to 15thNight
210%23%35%22%5%
720
16th to endNight
213%24%29%24%5%
768
April1st to 15thNight
316%29%24%20%5%
719
16th to endNight
214%27%25%23%5%
716
May1st to 15thNight
110%29%36%18%3
498
16th to endNight
114%29%27%24%2
515
June1st to 15thNight
6%28%42%20%1
495
16th to endNight
27%43%26%1
406
July1st to 15thNight
26%42%42%5%
398
16th to endNight
21436%49%5%
522
August1st to 15thNight
1430%51%11%
657
16th to endNight
5%24%51%16%
700
September1st to 15thNight
5%26%50%16%
660
16th to endNight
210%27%44%14%
656
October1st to 15thNight
5%16%34%32%10%
660
16th to endNight
1412%28%35%17%
704
November1st to 15thNight
1316%31%35%11%
700
16th to endNight
3413%31%32%14%
720
December1st to 15thNight
47%16%34%30%7%
720
16th to endNight
5%10%21%32%24%6%
768
Page generated at 2017-04-30 17:40:14. Version ac04

Copyright 2017 A. Danko


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