Caballo Lake State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Caballo Lake State Park clear sky chart from 2005-11-06 to 2024-12-24.

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
64%
24605
34%
98718
26%
24424
74%
24424
41%
43123

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 10thNight
61%
750
40%
3986
31%
736
73%
736
34%
1552
January11th to 20thNight
59%
752
44%
3902
30%
740
72%
740
43%
1293
January21st to endNight
55%
827
26%
4258
28%
814
73%
814
29%
2051
February1st to 10thNight
58%
760
39%
2464
28%
760
75%
760
56%
1058
February11th to 20thNight
52%
740
36%
2218
24%
740
66%
740
50%
1098
February21st to endNight
43%
628
38%
1827
22%
628
59%
628
52%
883
March1st to 10thNight
49%
751
46%
3324
20%
744
66%
744
41%
1279
March11th to 20thNight
58%
752
36%
3445
23%
740
69%
740
35%
1575
March21st to endNight
49%
828
27%
3622
18%
814
66%
814
41%
1442
April1st to 10thNight
52%
575
43%
1905
26%
575
74%
575
56%
782
April11th to 20thNight
48%
563
39%
1877
24%
563
68%
563
52%
799
April21st to endNight
52%
570
40%
1900
27%
570
74%
570
56%
764
May1st to 10thNight
58%
563
48%
2921
30%
559
74%
559
55%
806
May11th to 20thNight
66%
549
28%
2947
27%
541
74%
541
36%
1120
May21st to endNight
63%
606
29%
3054
28%
593
73%
593
58%
792
June1st to 10thNight
72%
570
33%
1710
29%
570
76%
570
54%
784
June11th to 20thNight
72%
570
32%
1710
28%
570
76%
570
59%
769
June21st to endNight
73%
570
22%
1710
21%
570
74%
570
40%
953
July1st to 10thNight
73%
536
24%
2502
21%
535
74%
535
26%
1269
July11th to 20thNight
76%
536
20%
2335
20%
533
76%
533
22%
1328
July21st to endNight
73%
605
14%
2753
18%
569
74%
569
18%
1747
August1st to 10thNight
80%
554
25%
2563
21%
545
81%
545
24%
1343
August11th to 20thNight
77%
547
20%
2740
26%
543
79%
543
24%
1389
August21st to endNight
78%
608
18%
3274
28%
605
80%
605
18%
2016
September1st to 10thNight
75%
570
28%
1900
33%
570
76%
570
35%
1044
September11th to 20thNight
78%
570
37%
1900
38%
570
80%
570
44%
944
September21st to endNight
79%
733
36%
2164
29%
733
84%
733
56%
1042
October1st to 10thNight
71%
742
47%
3349
25%
740
76%
740
48%
1157
October11th to 20thNight
71%
747
32%
3365
29%
740
79%
740
49%
1220
October21st to endNight
72%
819
49%
3749
29%
813
82%
813
60%
1093
November1st to 10thNight
74%
780
45%
2340
33%
780
83%
780
67%
986
November11th to 20thNight
70%
800
42%
2400
29%
800
80%
800
62%
1051
November21st to endNight
57%
862
43%
2462
27%
862
70%
862
53%
1215
December1st to 10thNight
61%
1000
39%
2720
25%
1000
70%
1000
54%
1381
December11th to 20thNight
56%
828
34%
3072
24%
828
69%
828
41%
1453
December21st to endNight
57%
844
26%
4350
31%
831
70%
831
38%
1645

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
321333435%7%65%
104986
Night
431433435%7%63%
103850
TransparencyDay
17%46%16%28%29%
104750
Night
19%46%15%28%27%
103675
SeeingDay
7%10%21%30%23%9%
14508
Night
5%420%42%26%3
24850

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 10thDay
231333446%7%66%
2858
11th to 20thDay
221222335%6%71%
2860
21st to endDay
6%41423436%7%58%
3146
February1st to 10thDay
2314233246%70%
1714
11th to 20thDay
4314332236%68%
1849
21st to endDay
231322335%5%71%
1622
March1st to 10thDay
2414333246%68%
3444
11th to 20thDay
8%415%334345%58%
3490
21st to endDay
1425%33446%8%60%
3825
April1st to 10thDay
2212223346%74%
2275
11th to 20thDay
3212222235%75%
2251
21st to endDay
1212222245%78%
2280
May1st to 10thDay
11111123483%
3800
11th to 20thDay
221333345%6%70%
3846
21st to endDay
11111212387%
4477
June1st to 10thDay
221333335%9%65%
2470
11th to 20thDay
221222325%6%74%
2470
21st to endDay
5%314445%5%8%8%52%
2470
July1st to 10thDay
321445%6%5%8%8%54%
4110
11th to 20thDay
221445%6%48%9%55%
4110
21st to endDay
4326%5%6%7%6%11%11%39%
4454
August1st to 10thDay
3214446%5%9%12%51%
3986
11th to 20thDay
32133345%8%9%59%
3726
21st to endDay
332445%6%6%9%10%48%
4180
September1st to 10thDay
8%415%5%4446%8%50%
2280
11th to 20thDay
6%32433435%7%60%
2280
21st to endDay
321223325%5%72%
2007
October1st to 10thDay
3112122135%78%
3170
11th to 20thDay
3212233245%75%
3150
21st to endDay
11111112386%
3438
November1st to 10thDay
312223236%75%
1959
11th to 20thDay
231222225%7%71%
2000
21st to endDay
5%41332435%7%63%
1907
December1st to 10thDay
441322335%7%65%
1675
11th to 20thDay
5%6%35%333336%61%
2234
21st to endDay
231323236%9%67%
3173
January1st to 10thNight
3424433346%64%
4097
11th to 20thNight
3213223246%72%
4110
21st to endNight
6%5%25%43346%6%55%
4521
February1st to 10thNight
221323336%6%70%
2464
11th to 20thNight
5%413333345%67%
2218
21st to endNight
3313233446%68%
1827
March1st to 10thNight
3413223346%67%
3430
11th to 20thNight
10%314333345%62%
3490
21st to endNight
231333435%9%64%
3828
April1st to 10thNight
121232335%6%73%
1905
11th to 20thNight
3313313245%71%
1877
21st to endNight
2112233345%74%
1900
May1st to 10thNight
11112213483%
3170
11th to 20thNight
431433345%6%65%
3054
21st to endNight
21211112385%
3110
June1st to 10thNight
321323437%7%64%
1710
11th to 20thNight
222223435%6%70%
1710
21st to endNight
5%325%5%5%5%48%8%50%
1710
July1st to 10thNight
3325%45%6%6%8%11%47%
2860
11th to 20thNight
3426%5%6%6%5%7%12%44%
2860
21st to endNight
5%5%39%6%7%7%7%10%11%31%
3109
August1st to 10thNight
2315%5%6%7%7%11%15%38%
2939
11th to 20thNight
3326%45%6%5%9%12%44%
3113
21st to endNight
45%28%7%7%7%7%9%10%35%
3487
September1st to 10thNight
6%315%5%5%6%47%7%49%
1900
11th to 20thNight
6%324335%46%7%58%
1900
21st to endNight
4313233346%68%
2164
October1st to 10thNight
3212222245%74%
3800
11th to 20thNight
3213222235%74%
3778
21st to endNight
1112122135%81%
4120
November1st to 10thNight
3112122346%75%
2340
11th to 20thNight
2313222245%75%
2400
21st to endNight
6%423222347%66%
2462
December1st to 10thNight
4413223347%66%
2720
11th to 20thNight
3315%34446%7%60%
3201
21st to endNight
4413233246%68%
4566

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 10thDay
16%4313%43%21%
2859
11th to 20thDay
12%5%5%20%43%15%
2860
21st to endDay
24%5%425%29%13%
3146
February1st to 10thDay
15%3417%29%32%
1714
11th to 20thDay
19%3215%32%28%
1859
21st to endDay
15%329%32%39%
1622
March1st to 10thDay
18%317%37%33%
3444
11th to 20thDay
26%5%316%26%24%
3490
21st to endDay
18%6%312%34%27%
3825
April1st to 10thDay
12%3211%31%42%
2275
11th to 20thDay
13%316%27%49%
2254
21st to endDay
10%2210%32%44%
2280
May1st to 10thDay
8%115%23%62%
3800
11th to 20thDay
13%5%410%26%41%
3849
21st to endDay
6%225%13%72%
4477
June1st to 10thDay
16%4313%25%40%
2470
11th to 20thDay
11%327%21%56%
2470
21st to endDay
25%5%7%15%18%30%
2470
July1st to 10thDay
23%6%11%17%18%25%
4046
11th to 20thDay
21%6%12%24%29%8%
4041
21st to endDay
30%8%15%30%15%3
4314
August1st to 10thDay
20%7%13%31%25%4
3972
11th to 20thDay
18%5%10%20%32%14%
3762
21st to endDay
25%8%14%24%22%8%
4179
September1st to 10thDay
28%6%8%18%23%17%
2280
11th to 20thDay
23%5%5%18%26%23%
2280
21st to endDay
15%3317%34%27%
2007
October1st to 10thDay
11%2410%29%45%
3170
11th to 20thDay
14%2412%34%34%
3150
21st to endDay
7%1113%34%44%
3438
November1st to 10thDay
12%1318%37%30%
1959
11th to 20thDay
14%2418%31%31%
2000
21st to endDay
22%25%16%33%23%
1907
December1st to 10thDay
18%3422%35%17%
1675
11th to 20thDay
27%25%19%32%14%
2233
21st to endDay
14%36%20%38%20%
3173
January1st to 10thNight
20%4216%42%15%
4097
11th to 20thNight
14%35%17%46%15%
4110
21st to endNight
26%5%5%21%31%12%
4521
February1st to 10thNight
15%2419%29%31%
2464
11th to 20thNight
20%3314%30%30%
2218
21st to endNight
17%339%30%38%
1827
March1st to 10thNight
16%4311%37%30%
3430
11th to 20thNight
25%4215%33%22%
3490
21st to endNight
16%5%415%37%24%
3828
April1st to 10thNight
12%3310%35%37%
1905
11th to 20thNight
15%2210%26%44%
1877
21st to endNight
11%4212%31%40%
1900
May1st to 10thNight
8%215%21%62%
3170
11th to 20thNight
17%6%5%9%22%41%
3055
21st to endNight
8%225%11%72%
3110
June1st to 10thNight
17%45%15%24%37%
1710
11th to 20thNight
14%438%17%53%
1710
21st to endNight
28%6%9%14%16%28%
1710
July1st to 10thNight
26%7%14%15%17%20%
2815
11th to 20thNight
30%7%12%19%26%6%
2806
21st to endNight
39%9%16%25%9%2
3011
August1st to 10thNight
27%8%14%34%13%4
2930
11th to 20thNight
26%7%12%16%30%9%
3143
21st to endNight
38%9%14%19%17%4
3487
September1st to 10thNight
29%6%11%18%19%17%
1900
11th to 20thNight
23%5%9%18%22%23%
1900
21st to endNight
17%46%15%33%25%
2164
October1st to 10thNight
13%25%8%29%42%
3800
11th to 20thNight
14%2413%28%39%
3778
21st to endNight
9%1110%31%48%
4120
November1st to 10thNight
11%2217%36%32%
2340
11th to 20thNight
13%2215%32%35%
2400
21st to endNight
20%2418%33%24%
2462
December1st to 10thNight
19%3421%33%21%
2720
11th to 20thNight
22%37%19%34%14%
3201
21st to endNight
19%3318%38%19%
4566

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 10thDay
8%11%25%40%14%2
270
11th to 20thDay
10%6%26%39%16%4
270
21st to endDay
8%9%33%31%16%3
297
February1st to 10thDay
7%12%27%32%19%4
270
11th to 20thDay
10%13%31%35%9%1
270
21st to endDay
17%22%28%24%8%2
277
March1st to 10thDay
12%24%32%23%9%1
460
11th to 20thDay
15%17%28%29%9%3
460
21st to endDay
12%28%30%20%8%1
506
April1st to 10thDay
5%25%35%22%11%2
460
11th to 20thDay
10%23%34%23%9%1
452
21st to endDay
7%24%32%24%11%2
460
May1st to 10thDay
5%21%37%25%10%3
463
11th to 20thDay
314%29%32%19%3
488
21st to endDay
414%36%31%14%1
529
June1st to 10thDay
46%24%34%25%7%
490
11th to 20thDay
5%8%25%33%22%8%
490
21st to endDay
7%217%32%28%14%
490
July1st to 10thDay
5%9%31%37%18%
486
11th to 20thDay
31124%42%29%
484
21st to endDay
41223%44%26%
531
August1st to 10thDay
31426%40%26%
487
11th to 20thDay
5%16%25%42%21%
477
21st to endDay
5%1428%41%21%
539
September1st to 10thDay
8%16%32%39%14%
490
11th to 20thDay
4217%34%32%12%
490
21st to endDay
46%16%34%29%11%
386
October1st to 10thDay
7%5%19%28%30%11%
300
11th to 20thDay
8%7%17%34%25%9%
300
21st to endDay
8%8%13%34%25%11%
330
November1st to 10thDay
7%11%26%35%16%6%
300
11th to 20thDay
5%8%20%33%29%5%
300
21st to endDay
9%13%30%32%12%4
300
December1st to 10thDay
11%7%25%39%17%2
300
11th to 20thDay
8%10%25%41%15%2
300
21st to endDay
9%13%27%36%14%1
306
January1st to 10thNight
6%322%48%19%2
760
11th to 20thNight
6%5%25%45%18%2
760
21st to endNight
6%8%26%42%16%2
836
February1st to 10thNight
46%29%42%18%2
760
11th to 20thNight
7%6%30%46%10%
744
21st to endNight
411%38%39%8%
628
March1st to 10thNight
5%8%32%43%12%1
760
11th to 20thNight
46%27%46%15%2
760
21st to endNight
49%33%42%11%1
836
April1st to 10thNight
28%34%46%9%
575
11th to 20thNight
411%33%40%11%
563
21st to endNight
210%32%45%11%1
570
May1st to 10thNight
37%28%50%12%
570
11th to 20thNight
4321%51%20%2
561
21st to endNight
26%23%55%13%
617
June1st to 10thNight
4314%54%25%1
570
11th to 20thNight
2219%51%26%1
570
21st to endNight
6%19%42%39%3
570
July1st to 10thNight
6%1430%52%7%
555
11th to 20thNight
31226%59%9%
552
21st to endNight
7%1320%59%10%
624
August1st to 10thNight
41122%59%13%
567
11th to 20thNight
6%1324%56%9%
564
21st to endNight
41227%59%7%
627
September1st to 10thNight
7%1432%51%5%
570
11th to 20thNight
6%16%42%42%2
570
21st to endNight
428%44%39%3
733
October1st to 10thNight
7%214%47%28%3
760
11th to 20thNight
5%216%49%26%2
760
21st to endNight
3416%43%29%5%
836
November1st to 10thNight
3317%49%25%3
780
11th to 20thNight
3319%45%26%4
800
21st to endNight
8%5%23%41%19%4
862
December1st to 10thNight
7%6%22%48%17%1
1000
11th to 20thNight
5%427%47%16%1
830
21st to endNight
5%5%28%46%14%2
850
Page generated at 2024-12-21 02:13:47. Version ac07

Copyright © 2024 Attilla Danko.


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