Lake Corpus Christi State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lake Corpus Christi State Park clear sky chart from 2005-11-06 to 2024-03-08.

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
52%
23718
23%
79703
17%
23623
58%
23623
29%
46559

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
40%
941
28%
4000
11%
926
47%
926
21%
2331
January11th to 20thNight
37%
943
30%
3913
9%
930
45%
930
26%
1937
January21st to endNight
37%
857
17%
4172
12%
843
47%
843
15%
2671
February1st to 10thNight
34%
760
24%
2280
12%
760
44%
760
24%
1491
February11th to 20thNight
33%
744
19%
2218
9%
740
40%
740
26%
1388
February21st to endNight
25%
609
22%
1865
7%
609
38%
609
26%
1169
March1st to 10thNight
32%
563
21%
2063
11%
563
44%
563
20%
1296
March11th to 20thNight
33%
540
18%
1980
13%
540
40%
540
19%
1275
March21st to endNight
35%
594
24%
2178
15%
594
49%
594
28%
1233
April1st to 10thNight
33%
540
20%
1980
12%
540
45%
540
21%
1239
April11th to 20thNight
33%
533
19%
1953
12%
533
44%
533
22%
1193
April21st to endNight
29%
540
22%
1792
13%
540
42%
540
22%
1156
May1st to 10thNight
34%
540
24%
1620
15%
540
44%
540
28%
1024
May11th to 20thNight
46%
531
19%
1594
14%
531
54%
531
32%
981
May21st to endNight
50%
583
20%
1745
17%
582
58%
582
30%
1088
June1st to 10thNight
74%
540
23%
1620
25%
540
78%
540
47%
826
June11th to 20thNight
69%
540
23%
1620
22%
540
76%
540
44%
856
June21st to endNight
73%
540
19%
1620
21%
540
76%
540
36%
946
July1st to 10thNight
75%
525
16%
1575
18%
525
76%
525
34%
946
July11th to 20thNight
85%
522
23%
1566
25%
522
87%
522
48%
797
July21st to endNight
84%
591
24%
1673
27%
558
87%
558
52%
825
August1st to 10thNight
91%
537
26%
1661
29%
534
92%
534
59%
735
August11th to 20thNight
83%
534
25%
1778
29%
534
85%
534
45%
871
August21st to endNight
81%
594
17%
2128
20%
594
83%
594
34%
1144
September1st to 10thNight
74%
540
16%
1980
20%
540
74%
540
28%
1136
September11th to 20thNight
73%
540
21%
1980
25%
540
74%
540
27%
1165
September21st to endNight
74%
540
25%
1980
27%
540
75%
540
34%
1055
October1st to 10thNight
81%
540
33%
1980
36%
540
82%
540
43%
929
October11th to 20thNight
64%
632
31%
2072
25%
632
68%
632
38%
1110
October21st to endNight
58%
792
34%
2376
25%
792
62%
792
42%
1257
November1st to 10thNight
61%
740
27%
2220
20%
740
63%
740
35%
1286
November11th to 20thNight
52%
767
26%
2287
19%
767
56%
767
33%
1371
November21st to endNight
44%
950
24%
2470
13%
950
50%
950
31%
1627
December1st to 10thNight
47%
950
26%
2470
16%
950
51%
950
30%
1640
December11th to 20thNight
36%
949
22%
2910
10%
948
41%
948
21%
1954
December21st to endNight
40%
1037
15%
4384
13%
1026
45%
1026
21%
2611

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
11%5%35%5%35%5%6%8%44%
79070
Night
13%5%2442445%8%50%
80562
TransparencyDay
37%8%12%20%16%8%
78795
Night
33%7%13%21%16%10%
80357
SeeingDay
11%5%20%31%25%8%
13624
Night
15%423%38%19%2
23752

By Month

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 10thDay
17%7%34433345%47%
2847
11th to 20thDay
15%424422345%53%
2850
21st to endDay
23%7%25%3245%6%7%37%
3459
February1st to 10thDay
19%8%35%5%3435%5%40%
1900
11th to 20thDay
19%6%35%433435%44%
1849
21st to endDay
17%7%35%424346%45%
1586
March1st to 10thDay
18%7%36%5%335%47%38%
2057
11th to 20thDay
16%7%37%4345%5%6%39%
1980
21st to endDay
11%6%345%345%47%48%
2178
April1st to 10thDay
13%6%35%435%46%8%44%
1980
11th to 20thDay
19%5%35%5%34447%42%
1956
21st to endDay
13%5%35%5%44447%45%
2164
May1st to 10thDay
9%5%36%6%35%5%6%8%43%
2340
11th to 20thDay
8%5%37%7%45%5%7%7%43%
2302
21st to endDay
7%425%6%5%7%6%8%10%40%
2531
June1st to 10thDay
5%3245%36%5%7%10%50%
2340
11th to 20thDay
5%3245%46%6%6%9%48%
2340
21st to endDay
7%435%7%47%6%8%11%38%
2340
July1st to 10thDay
9%5%46%7%47%6%7%9%37%
2340
11th to 20thDay
4325%6%46%5%6%10%49%
2340
21st to endDay
4325%5%45%6%6%11%48%
2546
August1st to 10thDay
21234245%7%11%59%
2263
11th to 20thDay
4324436%7%9%10%48%
2123
21st to endDay
5%5%25%6%5%7%7%8%11%39%
2228
September1st to 10thDay
9%6%36%7%5%8%6%6%10%35%
1980
11th to 20thDay
10%6%37%6%46%7%6%9%37%
1980
21st to endDay
7%426%6%45%6%7%10%44%
1980
October1st to 10thDay
6%3245%35%5%6%8%51%
1980
11th to 20thDay
11%42443445%8%49%
1868
21st to endDay
10%423324445%58%
1980
November1st to 10thDay
11%6%36%7%345%5%7%45%
1858
11th to 20thDay
13%6%35%43445%6%47%
1889
21st to endDay
16%6%36%6%44446%41%
1710
December1st to 10thDay
19%6%25%433447%43%
1710
11th to 20thDay
17%8%37%42445%6%41%
2161
21st to endDay
15%6%25%434447%45%
3135
January1st to 10thNight
19%7%24323345%46%
4108
11th to 20thNight
16%5%23312346%55%
4120
21st to endNight
24%6%36%5%2335%6%36%
4235
February1st to 10thNight
18%7%345%3445%6%43%
2280
11th to 20thNight
20%7%2432335%6%46%
2218
21st to endNight
19%7%24423445%46%
1865
March1st to 10thNight
20%6%25%334447%42%
2063
11th to 20thNight
18%7%36%5%34446%40%
1980
21st to endNight
15%5%24323446%51%
2178
April1st to 10thNight
13%6%35%5%35%5%6%8%40%
1980
11th to 20thNight
17%6%345%33447%44%
1953
21st to endNight
16%7%35%5%3445%6%42%
1792
May1st to 10thNight
10%5%36%5%36%5%6%9%42%
1620
11th to 20thNight
11%424445%5%6%9%45%
1593
21st to endNight
9%425%5%35%6%8%13%40%
1745
June1st to 10thNight
5%2123235%7%10%60%
1620
11th to 20thNight
33134345%6%10%57%
1620
21st to endNight
5%215%436%5%7%13%50%
1620
July1st to 10thNight
6%5%244345%7%12%48%
1620
11th to 20thNight
321232437%12%61%
1620
21st to endNight
3212225%5%6%10%63%
1772
August1st to 10thNight
112213349%74%
1671
11th to 20thNight
331232336%11%61%
1778
21st to endNight
441344446%11%54%
2128
September1st to 10thNight
6%5%36%5%245%5%9%50%
1980
11th to 20thNight
9%6%35%5%345%6%8%49%
1980
21st to endNight
8%32442445%8%55%
1980
October1st to 10thNight
5%32232245%7%64%
1980
11th to 20thNight
12%414423346%59%
2072
21st to endNight
10%42431223465%
2376
November1st to 10thNight
10%5%2343435%7%54%
2220
11th to 20thNight
14%425%423346%53%
2287
21st to endNight
16%6%25%434446%45%
2470
December1st to 10thNight
19%7%24423446%46%
2470
11th to 20thNight
18%8%35%5%2345%6%40%
3036
21st to endNight
15%8%25%424446%45%
4532

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
40%6%5%13%22%15%
2848
11th to 20thDay
33%5%8%18%22%14%
2850
21st to endDay
46%5%6%15%20%8%
3459
February1st to 10thDay
47%5%7%10%18%13%
1900
11th to 20thDay
42%5%9%16%17%11%
1859
21st to endDay
42%5%7%17%18%11%
1586
March1st to 10thDay
45%6%11%16%14%8%
2057
11th to 20thDay
45%7%9%11%15%12%
1980
21st to endDay
36%7%11%16%17%12%
2178
April1st to 10thDay
38%8%12%17%17%9%
1980
11th to 20thDay
43%6%8%18%14%11%
1956
21st to endDay
37%7%8%20%16%12%
2164
May1st to 10thDay
38%9%11%20%14%9%
2340
11th to 20thDay
38%8%11%20%19%4
2306
21st to endDay
35%11%13%23%17%1
2531
June1st to 10thDay
27%7%15%28%19%3
2340
11th to 20thDay
30%8%13%26%19%4
2340
21st to endDay
37%11%16%24%10%1
2340
July1st to 10thDay
40%11%17%22%10%
2276
11th to 20thDay
28%9%20%27%15%
2271
21st to endDay
26%10%23%33%7%1
2405
August1st to 10thDay
19%9%21%37%13%1
2249
11th to 20thDay
26%11%22%29%11%1
2123
21st to endDay
34%13%20%23%8%2
2228
September1st to 10thDay
44%11%14%14%12%4
1980
11th to 20thDay
41%11%15%17%14%3
1980
21st to endDay
33%9%14%18%17%8%
1980
October1st to 10thDay
30%6%14%19%25%6%
1980
11th to 20thDay
33%7%11%20%16%13%
1868
21st to endDay
28%5%8%16%24%18%
1980
November1st to 10thDay
37%7%11%17%18%9%
1858
11th to 20thDay
38%5%11%15%18%12%
1889
21st to endDay
44%5%8%15%16%11%
1710
December1st to 10thDay
42%5%8%18%18%8%
1710
11th to 20thDay
43%7%8%11%18%14%
2159
21st to endDay
39%6%7%18%20%11%
3135
January1st to 10thNight
38%6%8%12%15%21%
4108
11th to 20thNight
31%46%20%21%19%
4120
21st to endNight
47%5%7%12%20%9%
4235
February1st to 10thNight
43%5%9%12%14%16%
2280
11th to 20thNight
39%6%9%16%18%12%
2218
21st to endNight
40%5%8%20%16%10%
1865
March1st to 10thNight
42%7%11%16%14%10%
2063
11th to 20thNight
45%6%10%12%14%12%
1980
21st to endNight
34%6%13%18%17%12%
2178
April1st to 10thNight
41%8%12%17%14%8%
1980
11th to 20thNight
40%7%10%16%14%13%
1953
21st to endNight
42%7%9%17%15%10%
1792
May1st to 10thNight
36%9%13%19%13%10%
1620
11th to 20thNight
34%8%15%22%18%3
1594
21st to endNight
33%11%17%26%12%1
1746
June1st to 10thNight
18%8%20%33%19%2
1620
11th to 20thNight
22%8%15%35%19%2
1620
21st to endNight
26%11%21%31%11%1
1620
July1st to 10thNight
28%11%23%30%7%1
1575
11th to 20thNight
16%11%28%32%13%
1566
21st to endNight
14%10%32%36%8%
1673
August1st to 10thNight
10%7%29%43%10%
1661
11th to 20thNight
17%10%30%36%7%
1778
21st to endNight
23%12%26%29%8%1
2128
September1st to 10thNight
31%10%23%20%12%4
1980
11th to 20thNight
34%9%16%26%12%3
1980
21st to endNight
26%9%14%26%19%6%
1980
October1st to 10thNight
20%7%15%30%21%8%
1980
11th to 20thNight
28%5%11%24%19%13%
2072
21st to endNight
25%5%7%19%25%19%
2376
November1st to 10thNight
29%8%12%20%22%9%
2220
11th to 20thNight
34%6%14%17%18%12%
2287
21st to endNight
40%5%11%19%16%10%
2470
December1st to 10thNight
39%7%10%17%17%10%
2470
11th to 20thNight
44%6%7%14%14%15%
3037
21st to endNight
38%6%9%14%19%13%
4532

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
20%6%35%27%10%3
270
11th to 20thDay
20%8%28%31%12%1
270
21st to endDay
24%7%36%19%12%2
297
February1st to 10thDay
21%15%26%23%12%3
270
11th to 20thDay
21%12%32%25%9%
270
21st to endDay
21%12%39%20%7%
225
March1st to 10thDay
19%8%36%28%9%
261
11th to 20thDay
16%13%38%23%9%
240
21st to endDay
13%11%38%30%7%1
264
April1st to 10thDay
14%5%41%30%10%
240
11th to 20thDay
19%11%31%25%12%1
234
21st to endDay
14%10%37%30%8%1
424
May1st to 10thDay
11%9%40%29%10%
603
11th to 20thDay
9%436%35%13%3
625
21st to endDay
8%430%39%19%1
679
June1st to 10thDay
5%215%39%32%7%
630
11th to 20thDay
5%114%45%29%5%
630
21st to endDay
8%110%37%32%12%
630
July1st to 10thDay
6%18%36%37%11%
621
11th to 20thDay
35%35%46%12%
618
21st to endDay
5%1436%40%15%
684
August1st to 10thDay
15%38%40%16%
561
11th to 20thDay
317%36%36%17%
437
21st to endDay
7%5%24%33%31%
347
September1st to 10thDay
9%1421%41%24%
270
11th to 20thDay
7%414%47%27%
270
21st to endDay
6%17%19%41%25%
270
October1st to 10thDay
7%37%27%40%16%
270
11th to 20thDay
13%111%28%30%16%
270
21st to endDay
13%9%20%31%20%6%
297
November1st to 10thDay
13%5%15%27%31%8%
270
11th to 20thDay
20%417%29%28%3
270
21st to endDay
21%10%28%23%13%4
270
December1st to 10thDay
17%5%21%31%19%7%
270
11th to 20thDay
20%12%29%23%14%3
270
21st to endDay
17%7%29%34%10%2
297
January1st to 10thNight
23%7%25%35%10%1
950
11th to 20thNight
21%6%30%35%8%
950
21st to endNight
22%7%27%36%8%
865
February1st to 10thNight
23%9%31%33%5%
760
11th to 20thNight
25%7%31%32%6%
744
21st to endNight
24%8%39%26%3
609
March1st to 10thNight
23%8%33%31%5%
563
11th to 20thNight
20%8%34%33%4
540
21st to endNight
15%8%39%33%5%
594
April1st to 10thNight
15%5%43%33%5%
540
11th to 20thNight
20%6%37%31%7%
533
21st to endNight
18%8%41%28%6%
540
May1st to 10thNight
13%6%44%34%3
540
11th to 20thNight
13%334%40%9%1
531
21st to endNight
10%230%43%14%
584
June1st to 10thNight
6%115%52%25%1
540
11th to 20thNight
5%117%58%18%1
540
21st to endNight
5%114%46%31%3
540
July1st to 10thNight
5%110%50%32%2
525
11th to 20thNight
216%48%41%2
522
21st to endNight
27%48%41%1
591
August1st to 10thNight
448%43%4
537
11th to 20thNight
46%46%40%4
534
21st to endNight
5%1434%51%6%
594
September1st to 10thNight
7%5%35%45%7%
540
11th to 20thNight
12%1429%47%7%
540
21st to endNight
9%7%34%44%6%
540
October1st to 10thNight
427%36%48%4
540
11th to 20thNight
13%215%44%24%2
632
21st to endNight
10%5%23%39%23%1
792
November1st to 10thNight
11%418%41%25%1
740
11th to 20thNight
16%423%37%19%2
767
21st to endNight
19%6%25%33%16%2
950
December1st to 10thNight
21%5%21%38%13%1
950
11th to 20thNight
24%7%27%33%9%
950
21st to endNight
19%7%27%37%9%
1045
Page generated at 2024-03-05 06:23:58. Version ac07

Copyright © 2024 Attilla Danko.


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