Comanche Springs
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Comanche Springs clear sky chart from 2005-11-05 to 2018-03-21.

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
51%
16444
32%
49216
20%
16399
63%
16399
45%
25349

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
48%
974
33%
2522
15%
970
60%
970
48%
1381
January16th to endNight
46%
963
39%
2627
18%
963
60%
963
51%
1354
February1st to 15thNight
42%
764
31%
2292
16%
760
55%
760
42%
1194
February16th to endNight
33%
684
33%
2050
12%
684
50%
684
39%
1085
March1st to 15thNight
33%
703
30%
2263
14%
703
49%
703
35%
1209
March16th to endNight
35%
594
29%
2178
17%
594
52%
594
36%
1055
April1st to 15thNight
29%
539
29%
1849
14%
539
50%
539
35%
943
April16th to endNight
33%
540
33%
1731
16%
540
57%
540
42%
856
May1st to 15thNight
37%
539
28%
1620
17%
539
55%
539
41%
863
May16th to endNight
49%
562
29%
1684
21%
561
64%
561
45%
887
June1st to 15thNight
53%
540
23%
1620
16%
540
64%
540
48%
812
June16th to endNight
62%
540
27%
1620
26%
540
68%
540
50%
807
July1st to 15thNight
76%
510
22%
1530
24%
510
78%
510
45%
801
July16th to endNight
87%
564
34%
1594
39%
531
88%
531
56%
751
August1st to 15thNight
86%
539
33%
1688
40%
536
87%
536
54%
786
August16th to endNight
80%
573
29%
1910
34%
573
82%
573
45%
945
September1st to 15thNight
68%
540
24%
1939
27%
540
72%
540
32%
1072
September16th to endNight
65%
537
34%
1980
32%
537
73%
537
37%
1000
October1st to 15thNight
55%
540
35%
1980
30%
540
65%
540
41%
937
October16th to endNight
56%
759
41%
2295
22%
759
68%
759
56%
1058
November1st to 15thNight
52%
950
33%
2470
14%
950
62%
950
54%
1276
November16th to endNight
49%
975
39%
2535
17%
975
61%
975
52%
1328
December1st to 15thNight
48%
975
36%
2535
18%
975
59%
975
48%
1372
December16th to endNight
42%
1040
34%
2704
15%
1040
54%
1040
40%
1577

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
7%313323346%58%
49626
Night
6%313323347%61%
49412
Cloud CoverDay
7%313323346%59%
49624
Night
6%313323346%61%
49412
TransparencyDay
25%38%23%26%11%
49324
Night
23%38%21%27%15%
49217
SeeingDay
8%422%33%24%6%
6181
Night
7%5%29%38%16%1
16447

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
7%323213236%62%
1746
16th to endDay
6%312323345%63%
1960
February1st to 15thDay
7%413322235%62%
1900
16th to endDay
9%5%23313336%57%
1710
March1st to 15thDay
10%41331345%6%55%
2025
16th to endDay
7%423323335%60%
2173
April1st to 15thDay
9%312323336%60%
2096
16th to endDay
9%31332334460%
2227
May1st to 15thDay
11%323423345%56%
2331
16th to endDay
7%4233245%5%7%53%
2430
June1st to 15thDay
5%31342446%7%57%
2340
16th to endDay
5%21232445%8%57%
2340
July1st to 15thDay
6%213335%45%9%51%
2340
16th to endDay
221232346%10%60%
2466
August1st to 15thDay
32232436%8%60%
2259
16th to endDay
4314425%5%5%8%54%
2292
September1st to 15thDay
10%3145%2345%6%51%
2019
16th to endDay
10%214334346%55%
1980
October1st to 15thDay
8%31232333462%
1980
16th to endDay
4212212235%70%
1912
November1st to 15thDay
5%313222436%65%
1718
16th to endDay
7%312112235%68%
1755
December1st to 15thDay
8%5%14322246%57%
1755
16th to endDay
11%423322346%54%
1872
January1st to 15thNight
6%313313345%63%
2522
16th to endNight
5%212213325%67%
2627
February1st to 15thNight
7%423222245%61%
2282
16th to endNight
9%413322346%59%
2050
March1st to 15thNight
8%414423245%57%
2263
16th to endNight
7%323313346%60%
2178
April1st to 15thNight
7%422314435%59%
1849
16th to endNight
7%313213347%62%
1731
May1st to 15thNight
9%21232344461%
1619
16th to endNight
42223235%5%9%58%
1683
June1st to 15thNight
331232347%10%57%
1620
16th to endNight
321332336%9%59%
1620
July1st to 15thNight
4114325%5%6%10%54%
1620
16th to endNight
21231346%11%61%
1702
August1st to 15thNight
21123245%6%10%59%
1698
16th to endNight
32133145%6%10%56%
1910
September1st to 15thNight
10%324323447%50%
1939
16th to endNight
7%31443335%7%55%
1980
October1st to 15thNight
8%412322235%63%
1980
16th to endNight
221232223473%
2295
November1st to 15thNight
5%212212346%66%
2470
16th to endNight
6%213213335%66%
2535
December1st to 15thNight
8%312222345%64%
2535
16th to endNight
9%5%23323346%56%
2704

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
7%324223236%62%
1746
16th to endDay
6%312323345%63%
1960
February1st to 15thDay
7%323313235%62%
1900
16th to endDay
10%5%33313335%57%
1710
March1st to 15thDay
10%31331345%6%55%
2025
16th to endDay
7%42331333460%
2171
April1st to 15thDay
9%312313336%60%
2096
16th to endDay
9%31322334460%
2227
May1st to 15thDay
11%323413335%56%
2331
16th to endDay
7%41332445%7%53%
2430
June1st to 15thDay
6%22332445%7%57%
2340
16th to endDay
5%31332446%8%57%
2340
July1st to 15thDay
7%313335%45%9%51%
2340
16th to endDay
221232346%9%60%
2466
August1st to 15thDay
321241445%8%60%
2259
16th to endDay
431443445%8%55%
2292
September1st to 15thDay
11%2145%2345%6%51%
2019
16th to endDay
10%214334346%55%
1980
October1st to 15thDay
8%31232333462%
1980
16th to endDay
4212212235%71%
1912
November1st to 15thDay
5%313222435%65%
1718
16th to endDay
7%312212235%68%
1755
December1st to 15thDay
8%5%14323246%57%
1755
16th to endDay
12%414322347%53%
1872
January1st to 15thNight
7%313314345%63%
2522
16th to endNight
5%312213335%67%
2627
February1st to 15thNight
7%423212245%61%
2282
16th to endNight
9%413312346%59%
2050
March1st to 15thNight
9%413423245%57%
2263
16th to endNight
7%322313346%60%
2178
April1st to 15thNight
7%322323435%60%
1849
16th to endNight
8%312213347%62%
1731
May1st to 15thNight
9%21232344461%
1619
16th to endNight
5%2123225%5%9%58%
1683
June1st to 15thNight
431232337%10%57%
1620
16th to endNight
321332436%9%60%
1620
July1st to 15thNight
4223325%6%6%9%55%
1620
16th to endNight
311121345%11%61%
1702
August1st to 15thNight
311232446%10%60%
1698
16th to endNight
32133235%6%10%56%
1910
September1st to 15thNight
10%324324447%51%
1939
16th to endNight
7%31443335%7%55%
1980
October1st to 15thNight
8%312312336%63%
1980
16th to endNight
321222223473%
2295
November1st to 15thNight
5%22312346%67%
2470
16th to endNight
6%213213235%67%
2535
December1st to 15thNight
8%31222234464%
2535
16th to endNight
10%423323346%56%
2704

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
25%26%27%27%11%
1747
16th to endDay
23%25%20%34%13%
1960
February1st to 15thDay
25%26%22%30%12%
1901
16th to endDay
30%3321%25%15%
1710
March1st to 15thDay
29%35%20%28%12%
2025
16th to endDay
27%38%25%22%13%
2173
April1st to 15thDay
26%38%18%26%17%
2096
16th to endDay
26%37%20%29%12%
2227
May1st to 15thDay
31%38%20%23%12%
2331
16th to endDay
29%5%11%21%23%9%
2434
June1st to 15thDay
24%5%11%25%24%9%
2340
16th to endDay
24%411%23%26%10%
2340
July1st to 15thDay
28%5%11%26%22%4
2201
16th to endDay
17%413%32%27%5%
2311
August1st to 15thDay
20%5%13%25%24%10%
2245
16th to endDay
25%5%12%26%22%7%
2292
September1st to 15thDay
32%49%23%22%7%
2019
16th to endDay
29%46%22%26%11%
1980
October1st to 15thDay
26%38%24%24%12%
1980
16th to endDay
17%25%20%34%20%
1912
November1st to 15thDay
21%16%22%30%16%
1718
16th to endDay
21%1319%34%19%
1755
December1st to 15thDay
28%27%24%26%10%
1755
16th to endDay
31%26%23%26%8%
1872
January1st to 15thNight
23%26%21%31%14%
2522
16th to endNight
21%25%17%34%18%
2627
February1st to 15thNight
25%27%20%27%15%
2292
16th to endNight
26%25%19%25%19%
2050
March1st to 15thNight
29%36%16%25%18%
2263
16th to endNight
25%39%25%24%12%
2178
April1st to 15thNight
26%48%18%23%18%
1849
16th to endNight
22%48%22%25%16%
1731
May1st to 15thNight
25%49%19%21%19%
1620
16th to endNight
22%5%12%24%22%12%
1685
June1st to 15thNight
20%414%27%24%8%
1620
16th to endNight
20%411%24%26%12%
1620
July1st to 15thNight
23%411%30%21%8%
1530
16th to endNight
15%410%30%31%7%
1594
August1st to 15thNight
16%412%24%29%12%
1688
16th to endNight
21%5%12%27%22%10%
1910
September1st to 15thNight
31%5%9%20%21%10%
1939
16th to endNight
28%39%20%25%13%
1980
October1st to 15thNight
24%29%22%25%15%
1980
16th to endNight
17%2418%35%22%
2295
November1st to 15thNight
19%26%22%29%19%
2470
16th to endNight
20%2417%34%20%
2535
December1st to 15thNight
23%26%23%28%14%
2535
16th to endNight
29%36%20%27%13%
2704

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
15%327%34%17%1
135
16th to endDay
18%43%31%13%2
144
February1st to 15thDay
5%8%39%33%13%
135
16th to endDay
17%10%36%27%6%1
120
March1st to 15thDay
10%6%43%30%8%
135
16th to endDay
7%10%31%34%12%2
113
April1st to 15thDay
13%13%41%26%5%
215
16th to endDay
10%13%40%24%8%2
337
May1st to 15thDay
11%7%35%33%9%2
468
16th to endDay
11%6%28%33%16%4
517
June1st to 15thDay
5%121%43%22%5%
495
16th to endDay
5%113%40%30%7%
495
July1st to 15thDay
5%8%42%34%8%
475
16th to endDay
2330%47%16%
515
August1st to 15thDay
4229%50%12%
413
16th to endDay
339%32%40%11%
332
September1st to 15thDay
215%34%36%18%
174
16th to endDay
15%5%31%30%15%
135
October1st to 15thDay
5%222%36%29%3
135
16th to endDay
6%227%37%22%3
144
November1st to 15thDay
17%326%29%14%7%
135
16th to endDay
13%11%31%25%12%5%
135
December1st to 15thDay
9%240%31%14%
135
16th to endDay
18%11%32%30%6%
144
January1st to 15thNight
8%7%31%39%11%
975
16th to endNight
6%7%36%39%10%
963
February1st to 15thNight
9%8%34%36%10%
764
16th to endNight
11%10%40%30%5%
684
March1st to 15thNight
11%9%39%30%7%
703
16th to endNight
8%11%41%32%5%
594
April1st to 15thNight
7%11%47%28%3
539
16th to endNight
7%9%46%30%5%
540
May1st to 15thNight
9%7%43%30%8%1
540
16th to endNight
4435%38%15%
563
June1st to 15thNight
5%233%44%13%
540
16th to endNight
3124%46%21%1
540
July1st to 15thNight
49%50%32%3
510
16th to endNight
31345%43%3
564
August1st to 15thNight
21344%44%2
539
16th to endNight
37%41%42%4
573
September1st to 15thNight
10%212%39%33%2
540
16th to endNight
8%117%44%26%2
537
October1st to 15thNight
9%327%39%19%1
540
16th to endNight
4432%40%17%1
759
November1st to 15thNight
6%5%32%37%16%1
950
16th to endNight
8%6%31%39%12%
975
December1st to 15thNight
10%6%30%40%11%
975
16th to endNight
12%7%32%37%9%
1040
Page generated at 2018-03-22 10:34:22. Version ac04

Copyright 2018 A. Danko


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