Council Grove Lake
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Council Grove Lake clear sky chart from 2005-11-06 to 2024-01-13.

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
39%
24471
24%
74419
14%
24408
49%
24408
32%
43530

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
31%
950
26%
2458
9%
946
44%
946
33%
1518
January11th to 20thNight
28%
911
25%
2367
9%
911
39%
911
31%
1505
January21st to endNight
28%
990
27%
2574
9%
990
40%
990
32%
1597
February1st to 10thNight
23%
900
18%
2340
5%
900
30%
900
28%
1543
February11th to 20thNight
26%
791
21%
2186
7%
787
35%
787
28%
1375
February21st to endNight
25%
592
27%
1776
8%
592
40%
592
28%
1057
March1st to 10thNight
27%
561
26%
2001
12%
561
43%
561
27%
1109
March11th to 20thNight
30%
540
21%
1980
14%
540
41%
540
24%
1150
March21st to endNight
23%
594
17%
2178
9%
594
34%
594
17%
1402
April1st to 10thNight
28%
540
21%
1972
11%
540
44%
540
27%
1074
April11th to 20thNight
28%
533
24%
1699
13%
533
43%
533
26%
1018
April21st to endNight
29%
540
22%
1620
12%
540
45%
540
28%
1006
May1st to 10thNight
32%
540
17%
1620
11%
540
41%
540
24%
1050
May11th to 20thNight
42%
531
22%
1594
17%
531
50%
531
33%
942
May21st to endNight
44%
583
17%
1745
11%
582
51%
582
31%
1064
June1st to 10thNight
58%
540
21%
1620
14%
540
65%
540
43%
868
June11th to 20thNight
52%
540
20%
1620
12%
540
57%
540
39%
893
June21st to endNight
49%
540
23%
1620
13%
540
57%
540
45%
859
July1st to 10thNight
66%
525
17%
1575
14%
525
68%
525
40%
873
July11th to 20thNight
71%
522
24%
1566
22%
522
75%
522
51%
776
July21st to endNight
66%
591
23%
1673
22%
558
71%
558
39%
938
August1st to 10thNight
66%
537
21%
1601
21%
534
71%
534
40%
877
August11th to 20thNight
66%
534
29%
1600
30%
534
72%
534
40%
885
August21st to endNight
69%
594
31%
1840
31%
594
72%
594
47%
925
September1st to 10thNight
58%
540
26%
1931
26%
540
65%
540
37%
978
September11th to 20thNight
57%
540
29%
1980
27%
540
66%
540
35%
1029
September21st to endNight
53%
540
32%
1980
25%
540
64%
540
37%
962
October1st to 10thNight
47%
629
27%
2069
20%
629
53%
629
32%
1154
October11th to 20thNight
33%
720
30%
2160
13%
720
46%
720
38%
1182
October21st to endNight
34%
792
29%
2376
13%
792
47%
792
33%
1366
November1st to 10thNight
41%
849
32%
2329
14%
849
53%
849
44%
1259
November11th to 20thNight
33%
950
30%
2470
10%
950
46%
950
41%
1394
November21st to endNight
36%
950
28%
2470
11%
950
47%
950
36%
1479
December1st to 10thNight
34%
950
26%
2470
10%
950
45%
950
33%
1528
December11th to 20thNight
27%
949
27%
2887
8%
948
40%
948
27%
1739
December21st to endNight
27%
1043
17%
4472
11%
1026
39%
1026
16%
3156

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
10%6%35%5%3445%7%48%
74928
Night
10%6%35%42445%7%51%
74834
TransparencyDay
36%5%12%26%17%3
74652
Night
33%5%12%27%20%4
74630
SeeingDay
13%10%30%29%15%3
14471
Night
12%10%34%32%11%1
24475

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
9%7%26%5%35%35%6%48%
1707
11th to 20thDay
10%8%46%6%33446%46%
1638
21st to endDay
8%6%49%5%345%5%7%44%
1782
February1st to 10thDay
9%11%38%6%23446%42%
1620
11th to 20thDay
8%7%48%6%35%45%6%44%
1678
21st to endDay
8%7%46%5%2445%7%46%
1480
March1st to 10thDay
9%7%35%5%35%5%5%7%47%
1957
11th to 20thDay
18%9%34423347%44%
1980
21st to endDay
15%9%46%6%4445%6%36%
2178
April1st to 10thDay
12%6%34434446%49%
1988
11th to 20thDay
13%7%35%6%35%447%43%
2208
21st to endDay
16%7%35%6%35%45%6%40%
2340
May1st to 10thDay
16%9%46%5%3445%7%38%
2340
11th to 20thDay
14%6%35%5%3445%7%43%
2302
21st to endDay
12%8%47%6%36%6%5%7%36%
2531
June1st to 10thDay
6%3244345%6%9%54%
2340
11th to 20thDay
7%5%35%4345%6%8%51%
2340
21st to endDay
6%3234345%6%9%55%
2340
July1st to 10thDay
10%425%5%26%5%7%9%45%
2340
11th to 20thDay
32144345%7%10%57%
2340
21st to endDay
7%425%5%37%6%7%9%46%
2546
August1st to 10thDay
7%5%246%35%6%6%9%47%
2328
11th to 20thDay
7%4235%445%6%8%52%
2301
21st to endDay
6%32442445%8%57%
2516
September1st to 10thDay
11%5%2442345%7%54%
2025
11th to 20thDay
10%425%5%335%6%7%52%
1980
21st to endDay
9%4245%3435%6%55%
1980
October1st to 10thDay
11%425%43345%6%52%
1872
11th to 20thDay
11%424323246%60%
1800
21st to endDay
13%7%24423345%52%
1980
November1st to 10thDay
6%4243235%5%8%58%
1745
11th to 20thDay
9%5%2442335%7%56%
1710
21st to endDay
14%5%33422335%56%
1710
December1st to 10thDay
9%5%345%2446%8%50%
1710
11th to 20thDay
8%7%47%6%34446%45%
2161
21st to endDay
13%10%6%16%6%34446%28%
3135
January1st to 10thNight
7%7%26%5%3445%6%51%
2458
11th to 20thNight
9%8%446%2445%5%49%
2367
21st to endNight
9%5%36%5%3445%6%51%
2574
February1st to 10thNight
9%10%46%6%3445%6%44%
2340
11th to 20thNight
10%8%36%5%3445%6%47%
2185
21st to endNight
9%5%35%6%34446%51%
1776
March1st to 10thNight
9%7%35%4245%5%7%50%
2001
11th to 20thNight
13%7%34335%45%6%47%
1980
21st to endNight
18%8%25%5%3445%6%38%
2178
April1st to 10thNight
10%4245%34447%53%
1972
11th to 20thNight
12%7%35%5%235%6%7%46%
1699
21st to endNight
13%7%244345%5%7%46%
1620
May1st to 10thNight
14%7%36%5%345%5%8%40%
1620
11th to 20thNight
12%7%24423448%50%
1593
21st to endNight
10%5%35%5%35%5%6%9%45%
1745
June1st to 10thNight
5%2233345%8%10%55%
1620
11th to 20thNight
5%324435%46%10%53%
1620
21st to endNight
5%32342445%9%58%
1620
July1st to 10thNight
6%424425%5%6%9%52%
1620
11th to 20thNight
2212425%47%11%61%
1620
21st to endNight
6%325%4345%7%10%50%
1772
August1st to 10thNight
432444447%10%54%
1611
11th to 20thNight
6%316%5%3445%6%57%
1600
21st to endNight
5%32432445%8%62%
1840
September1st to 10thNight
9%42342345%7%57%
1931
11th to 20thNight
9%42443445%7%55%
1980
21st to endNight
7%423423446%61%
1980
October1st to 10thNight
11%434434445%54%
2069
11th to 20thNight
11%424323345%60%
2160
21st to endNight
13%6%34323345%56%
2376
November1st to 10thNight
7%424323346%63%
2329
11th to 20thNight
7%42442345%7%59%
2470
21st to endNight
12%5%23313445%56%
2470
December1st to 10thNight
8%5%36%425%5%5%6%50%
2470
11th to 20thNight
10%7%36%43445%6%49%
3036
21st to endNight
16%11%5%11%5%23445%35%
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
38%312%26%18%3
1708
11th to 20thDay
40%313%25%16%2
1638
21st to endDay
40%416%25%13%2
1782
February1st to 10thDay
44%5%13%24%11%4
1620
11th to 20thDay
41%413%25%13%4
1687
21st to endDay
37%411%26%18%4
1480
March1st to 10thDay
37%411%23%19%5%
1957
11th to 20thDay
43%48%24%17%3
1980
21st to endDay
49%5%14%22%8%2
2178
April1st to 10thDay
36%412%25%20%3
1988
11th to 20thDay
42%412%25%15%2
2208
21st to endDay
44%5%10%27%12%1
2340
May1st to 10thDay
46%6%12%20%15%2
2340
11th to 20thDay
40%5%15%27%13%1
2306
21st to endDay
47%7%15%21%8%2
2531
June1st to 10thDay
26%8%15%33%16%2
2340
11th to 20thDay
30%6%13%28%19%3
2340
21st to endDay
25%6%15%31%19%4
2340
July1st to 10thDay
33%8%13%26%16%4
2276
11th to 20thDay
22%7%16%29%19%7%
2271
21st to endDay
31%6%15%29%17%1
2405
August1st to 10thDay
32%8%15%27%15%2
2314
11th to 20thDay
30%5%11%32%19%3
2301
21st to endDay
25%7%11%27%21%8%
2516
September1st to 10thDay
32%5%12%24%19%8%
2025
11th to 20thDay
31%6%12%26%21%4
1980
21st to endDay
30%49%27%26%3
1980
October1st to 10thDay
32%412%24%23%4
1872
11th to 20thDay
28%38%27%28%7%
1800
21st to endDay
34%411%22%21%7%
1980
November1st to 10thDay
25%5%13%30%21%7%
1745
11th to 20thDay
29%49%28%26%4
1710
21st to endDay
33%310%29%23%3
1710
December1st to 10thDay
34%412%33%16%1
1710
11th to 20thDay
41%311%27%16%2
2159
21st to endDay
58%48%19%9%1
3135
January1st to 10thNight
34%413%27%19%3
2458
11th to 20thNight
38%312%26%18%2
2367
21st to endNight
35%415%27%16%3
2574
February1st to 10thNight
41%413%23%15%4
2340
11th to 20thNight
38%411%27%16%3
2186
21st to endNight
35%5%10%23%20%7%
1776
March1st to 10thNight
34%410%25%21%7%
2001
11th to 20thNight
38%5%12%23%17%5%
1980
21st to endNight
47%5%12%21%13%2
2178
April1st to 10thNight
33%412%23%24%4
1972
11th to 20thNight
37%5%10%26%19%3
1699
21st to endNight
37%5%13%25%17%3
1620
May1st to 10thNight
42%6%15%20%16%2
1620
11th to 20thNight
34%5%15%29%17%1
1594
21st to endNight
34%7%21%24%13%2
1746
June1st to 10thNight
23%7%19%33%16%3
1620
11th to 20thNight
26%7%14%32%18%4
1620
21st to endNight
23%6%13%33%21%5%
1620
July1st to 10thNight
27%6%17%28%17%5%
1575
11th to 20thNight
18%6%15%30%25%6%
1566
21st to endNight
27%7%14%32%18%1
1673
August1st to 10thNight
25%7%19%31%13%4
1601
11th to 20thNight
27%6%11%33%21%3
1600
21st to endNight
21%5%12%28%26%8%
1840
September1st to 10thNight
28%412%27%21%9%
1931
11th to 20thNight
28%5%10%26%25%6%
1980
21st to endNight
25%49%25%31%6%
1980
October1st to 10thNight
33%49%23%25%6%
2069
11th to 20thNight
28%37%28%26%8%
2160
21st to endNight
32%49%21%28%6%
2376
November1st to 10thNight
25%39%30%24%9%
2329
11th to 20thNight
26%410%30%26%4
2470
21st to endNight
31%410%29%21%5%
2470
December1st to 10thNight
34%413%28%20%1
2470
11th to 20thNight
36%49%30%19%2
3037
21st to endNight
53%39%22%11%2
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
16%17%33%24%10%
270
11th to 20thDay
22%15%43%17%3
246
21st to endDay
11%15%50%21%3
264
February1st to 10thDay
21%19%40%16%3
240
11th to 20thDay
14%19%45%15%6%
240
21st to endDay
16%23%45%12%41
198
March1st to 10thDay
18%16%44%19%3
240
11th to 20thDay
23%12%43%18%31
240
21st to endDay
24%22%38%14%3
264
April1st to 10thDay
20%18%39%19%4
248
11th to 20thDay
17%15%42%21%5%1
486
21st to endDay
20%19%33%19%7%2
600
May1st to 10thDay
19%13%36%22%8%1
603
11th to 20thDay
19%11%28%27%13%3
625
21st to endDay
19%10%29%24%14%4
679
June1st to 10thDay
5%5%25%35%23%6%
630
11th to 20thDay
7%6%29%37%17%3
630
21st to endDay
7%7%35%37%13%1
630
July1st to 10thDay
11%215%35%29%8%
621
11th to 20thDay
3419%43%26%6%
618
21st to endDay
6%214%42%31%5%
684
August1st to 10thDay
8%418%39%28%3
626
11th to 20thDay
6%317%42%27%5%
615
21st to endDay
9%315%34%31%8%
635
September1st to 10thDay
10%416%38%26%5%
315
11th to 20thDay
6%326%37%23%6%
270
21st to endDay
13%6%30%32%15%3
270
October1st to 10thDay
13%11%31%24%16%5%
270
11th to 20thDay
8%20%43%21%7%1
270
21st to endDay
23%14%35%20%7%1
297
November1st to 10thDay
11%12%38%28%9%1
270
11th to 20thDay
18%18%33%23%7%1
270
21st to endDay
23%10%37%21%8%1
270
December1st to 10thDay
10%13%40%30%5%3
270
11th to 20thDay
13%18%39%24%6%1
270
21st to endDay
17%23%40%19%1
297
January1st to 10thNight
11%13%40%29%7%
950
11th to 20thNight
13%13%39%28%5%1
911
21st to endNight
11%15%40%30%4
990
February1st to 10thNight
14%14%43%25%3
900
11th to 20thNight
15%15%40%27%4
791
21st to endNight
14%17%41%24%4
592
March1st to 10thNight
14%12%43%25%4
561
11th to 20thNight
18%12%36%27%6%
540
21st to endNight
23%13%37%22%4
594
April1st to 10thNight
15%14%41%24%6%1
540
11th to 20thNight
16%16%35%28%4
533
21st to endNight
17%14%39%24%6%1
540
May1st to 10thNight
17%12%33%32%6%1
540
11th to 20thNight
16%8%30%34%11%1
531
21st to endNight
12%7%33%30%16%2
584
June1st to 10thNight
5%428%40%22%1
540
11th to 20thNight
6%5%32%43%14%
540
21st to endNight
6%436%41%13%
540
July1st to 10thNight
7%314%47%28%2
525
11th to 20thNight
3219%50%23%3
522
21st to endNight
7%216%44%29%1
591
August1st to 10thNight
5%219%49%23%1
537
11th to 20thNight
7%215%50%25%1
534
21st to endNight
7%217%41%30%3
594
September1st to 10thNight
12%323%41%20%2
540
11th to 20thNight
9%425%38%22%2
540
21st to endNight
9%6%28%39%17%1
540
October1st to 10thNight
12%6%30%32%18%1
629
11th to 20thNight
15%9%40%28%8%
720
21st to endNight
17%10%35%27%11%
792
November1st to 10thNight
9%10%35%34%11%
849
11th to 20thNight
11%13%40%28%8%
950
21st to endNight
15%14%33%31%7%
950
December1st to 10thNight
13%12%37%33%6%1
950
11th to 20thNight
16%12%39%29%4
950
21st to endNight
16%16%37%27%5%
1045
Page generated at 2024-01-10 00:25:04. Version ac07

Copyright 2024 Attilla Danko


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