McGee Creek Natural Scenic State Recreation Area
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the McGee Creek Natural Scenic State Recreation Area clear sky chart from 2005-11-06 to 2024-01-14.

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
40%
24133
28%
74236
16%
24071
51%
24071
33%
41841

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
29%
949
30%
2458
10%
946
43%
946
34%
1471
January11th to 20thNight
25%
918
28%
2386
8%
918
38%
918
30%
1466
January21st to endNight
29%
990
33%
2574
11%
990
43%
990
32%
1556
February1st to 10thNight
21%
900
23%
2340
6%
900
32%
900
25%
1528
February11th to 20thNight
19%
731
22%
2125
6%
727
31%
727
23%
1319
February21st to endNight
18%
526
28%
1710
7%
526
37%
526
20%
1022
March1st to 10thNight
24%
540
25%
1980
12%
540
39%
540
22%
1153
March11th to 20thNight
21%
540
23%
1980
12%
540
37%
540
22%
1177
March21st to endNight
24%
594
24%
2178
11%
594
42%
594
23%
1262
April1st to 10thNight
22%
540
24%
1980
11%
540
41%
540
23%
1093
April11th to 20thNight
27%
533
26%
1781
14%
533
44%
533
28%
996
April21st to endNight
27%
540
25%
1715
11%
540
46%
540
28%
997
May1st to 10thNight
33%
540
25%
1620
16%
540
47%
540
30%
978
May11th to 20thNight
36%
531
21%
1594
14%
531
47%
531
32%
941
May21st to endNight
43%
584
24%
1745
17%
582
56%
582
34%
1026
June1st to 10thNight
62%
540
24%
1620
21%
540
69%
540
45%
846
June11th to 20thNight
54%
540
26%
1620
21%
540
62%
540
49%
821
June21st to endNight
69%
540
28%
1620
27%
540
75%
540
53%
793
July1st to 10thNight
71%
525
22%
1575
23%
525
74%
525
41%
863
July11th to 20thNight
76%
522
31%
1566
32%
522
82%
522
62%
690
July21st to endNight
78%
591
30%
1673
34%
558
81%
558
53%
819
August1st to 10thNight
77%
537
31%
1601
33%
534
81%
534
52%
781
August11th to 20thNight
73%
534
35%
1600
36%
534
77%
534
47%
835
August21st to endNight
76%
594
27%
1944
29%
594
78%
594
43%
986
September1st to 10thNight
70%
540
28%
1953
32%
540
73%
540
41%
937
September11th to 20thNight
61%
540
28%
1980
26%
540
68%
540
31%
1071
September21st to endNight
64%
540
36%
1980
32%
540
73%
540
44%
911
October1st to 10thNight
51%
634
35%
2074
24%
634
62%
634
41%
1054
October11th to 20thNight
39%
720
35%
2160
16%
720
52%
720
39%
1164
October21st to endNight
35%
792
31%
2376
16%
792
47%
792
32%
1380
November1st to 10thNight
36%
740
32%
2220
15%
740
51%
740
36%
1222
November11th to 20thNight
35%
857
30%
2377
13%
857
47%
857
36%
1346
November21st to endNight
29%
950
29%
2470
11%
950
41%
950
30%
1525
December1st to 10thNight
29%
950
30%
2470
11%
950
42%
950
34%
1500
December11th to 20thNight
25%
949
29%
2861
10%
948
37%
948
25%
1788
December21st to endNight
25%
1042
18%
4330
9%
1026
39%
1026
18%
2524

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
14%5%2443445%7%48%
74962
Night
12%5%24323447%54%
74820
TransparencyDay
37%310%24%21%5%
74687
Night
32%39%24%24%8%
74615
SeeingDay
16%11%28%26%15%3
14156
Night
16%12%29%30%13%1
24138

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
14%8%24323346%51%
1707
11th to 20thDay
13%7%34333345%51%
1647
21st to endDay
16%7%24323345%51%
1782
February1st to 10thDay
20%7%36%425%33442%
1620
11th to 20thDay
18%7%35%5%33345%44%
1735
21st to endDay
24%7%35%32333444%
1543
March1st to 10thDay
18%6%25%42335%5%46%
1980
11th to 20thDay
23%7%36%42333442%
1980
21st to endDay
19%8%35%43335%5%41%
2178
April1st to 10thDay
16%6%36%433446%45%
1980
11th to 20thDay
18%5%245%3445%5%46%
2126
21st to endDay
19%6%35%433446%43%
2240
May1st to 10thDay
18%6%35%5%35%447%43%
2340
11th to 20thDay
15%6%35%6%35%5%46%41%
2302
21st to endDay
15%6%36%7%45%46%8%37%
2531
June1st to 10thDay
10%5%24426%5%7%10%45%
2340
11th to 20thDay
10%425%5%45%6%7%9%44%
2340
21st to endDay
6%3235%35%5%6%9%54%
2340
July1st to 10thDay
9%425%6%46%7%7%11%38%
2340
11th to 20thDay
5%2145%25%5%8%9%54%
2340
21st to endDay
6%3245%35%6%8%9%49%
2546
August1st to 10thDay
5%2135%36%6%7%9%52%
2328
11th to 20thDay
9%5%25%5%3446%9%49%
2301
21st to endDay
5%3236%45%5%8%9%49%
2411
September1st to 10thDay
11%41443446%6%52%
2002
11th to 20thDay
10%5%25%6%45%6%5%7%46%
1980
21st to endDay
9%31343445%7%58%
1980
October1st to 10thDay
9%4235%34445%57%
1868
11th to 20thDay
14%42432232460%
1800
21st to endDay
19%6%2332323453%
1980
November1st to 10thDay
13%5%24423445%54%
1858
11th to 20thDay
12%42432334459%
1801
21st to endDay
19%5%24323235%52%
1710
December1st to 10thDay
18%6%23213346%51%
1710
11th to 20thDay
20%7%24434345%44%
2161
21st to endDay
21%7%24423446%41%
3135
January1st to 10thNight
13%424424446%54%
2458
11th to 20thNight
14%6%34323345%53%
2386
21st to endNight
13%6%24323435%55%
2574
February1st to 10thNight
17%7%34423345%47%
2340
11th to 20thNight
17%7%35%32335%6%46%
2125
21st to endNight
19%7%24323435%49%
1710
March1st to 10thNight
17%6%25%334345%47%
1980
11th to 20thNight
18%6%24433346%48%
1980
21st to endNight
15%6%2443445%6%47%
2178
April1st to 10thNight
15%5%24424446%51%
1980
11th to 20thNight
14%5%24323347%50%
1781
21st to endNight
15%5%245%23347%50%
1715
May1st to 10thNight
12%5%25%5%3446%7%48%
1620
11th to 20thNight
12%5%2443445%8%49%
1593
21st to endNight
10%4245%25%5%5%11%47%
1745
June1st to 10thNight
5%3233235%6%9%59%
1620
11th to 20thNight
6%32332346%11%58%
1620
21st to endNight
421322445%8%66%
1620
July1st to 10thNight
6%313435%5%7%11%51%
1620
11th to 20thNight
311122336%10%67%
1620
21st to endNight
32133245%6%11%60%
1772
August1st to 10thNight
321332446%11%60%
1611
11th to 20thNight
6%31343446%9%57%
1600
21st to endNight
332443446%10%57%
1944
September1st to 10thNight
7%32332345%7%60%
1953
11th to 20thNight
9%4245%435%5%7%52%
1980
21st to endNight
7%223213447%64%
1980
October1st to 10thNight
8%314323346%61%
2074
11th to 20thNight
13%423323336%60%
2160
21st to endNight
18%5%2332223456%
2376
November1st to 10thNight
12%423423445%59%
2220
11th to 20thNight
9%5%24323445%59%
2377
21st to endNight
19%5%23313346%53%
2470
December1st to 10thNight
15%5%24323446%52%
2470
11th to 20thNight
15%6%36%423335%49%
3036
21st to endNight
19%8%24322335%49%
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
36%28%25%23%6%
1708
11th to 20thDay
37%26%26%25%4
1647
21st to endDay
38%15%23%25%7%
1782
February1st to 10thDay
47%28%18%20%5%
1620
11th to 20thDay
45%26%23%19%5%
1745
21st to endDay
47%2414%24%9%
1543
March1st to 10thDay
42%27%18%19%12%
1980
11th to 20thDay
48%26%21%17%6%
1980
21st to endDay
47%27%22%18%3
2178
April1st to 10thDay
41%39%22%18%7%
1980
11th to 20thDay
41%310%23%19%5%
2126
21st to endDay
44%38%22%19%3
2240
May1st to 10thDay
43%310%22%18%4
2340
11th to 20thDay
44%413%24%15%1
2306
21st to endDay
46%5%12%22%14%1
2531
June1st to 10thDay
33%5%16%29%14%2
2340
11th to 20thDay
35%5%14%27%18%2
2340
21st to endDay
26%6%12%29%24%3
2340
July1st to 10thDay
37%6%18%24%14%1
2276
11th to 20thDay
24%5%13%33%22%3
2271
21st to endDay
26%5%18%35%15%
2405
August1st to 10thDay
25%5%16%30%22%2
2314
11th to 20thDay
33%315%26%20%3
2301
21st to endDay
29%6%15%30%16%4
2411
September1st to 10thDay
32%48%25%22%9%
2002
11th to 20thDay
36%5%10%21%21%8%
1980
21st to endDay
27%48%23%29%9%
1980
October1st to 10thDay
31%410%19%25%11%
1868
11th to 20thDay
31%25%18%30%15%
1800
21st to endDay
38%16%19%26%10%
1980
November1st to 10thDay
34%28%25%24%7%
1858
11th to 20thDay
30%27%25%27%9%
1801
21st to endDay
38%15%22%26%8%
1710
December1st to 10thDay
36%29%28%21%4
1710
11th to 20thDay
45%2420%23%7%
2159
21st to endDay
45%15%21%23%4
3135
January1st to 10thNight
33%27%22%30%6%
2458
11th to 20thNight
35%27%23%25%8%
2386
21st to endNight
34%2421%29%11%
2574
February1st to 10thNight
41%38%21%21%7%
2340
11th to 20thNight
40%36%23%21%6%
2125
21st to endNight
41%26%18%22%12%
1710
March1st to 10thNight
41%26%18%20%14%
1980
11th to 20thNight
41%38%19%21%8%
1980
21st to endNight
39%39%23%22%4
2178
April1st to 10thNight
36%29%21%20%11%
1980
11th to 20thNight
35%38%24%19%11%
1781
21st to endNight
37%210%26%23%3
1715
May1st to 10thNight
37%410%23%18%8%
1620
11th to 20thNight
35%414%28%16%2
1594
21st to endNight
34%416%27%16%3
1746
June1st to 10thNight
24%416%33%20%3
1620
11th to 20thNight
22%413%34%23%4
1620
21st to endNight
18%413%29%30%5%
1620
July1st to 10thNight
27%5%16%30%20%3
1575
11th to 20thNight
13%313%39%26%5%
1566
21st to endNight
19%417%34%25%1
1673
August1st to 10thNight
20%314%34%24%5%
1601
11th to 20thNight
24%313%29%27%5%
1600
21st to endNight
25%413%32%22%4
1944
September1st to 10thNight
24%410%25%27%10%
1953
11th to 20thNight
32%48%22%22%11%
1980
21st to endNight
22%37%25%30%13%
1980
October1st to 10thNight
26%39%24%23%16%
2074
11th to 20thNight
29%26%16%30%18%
2160
21st to endNight
35%1420%27%13%
2376
November1st to 10thNight
29%36%24%27%11%
2220
11th to 20thNight
30%26%23%28%11%
2377
21st to endNight
36%36%20%28%8%
2470
December1st to 10thNight
34%29%23%22%9%
2470
11th to 20thNight
40%25%18%27%8%
3037
21st to endNight
41%16%23%22%7%
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
23%24%34%15%3
270
11th to 20thDay
27%24%36%10%21
249
21st to endDay
25%25%30%15%5%
264
February1st to 10thDay
33%20%36%10%2
240
11th to 20thDay
35%23%36%5%
240
21st to endDay
45%22%26%6%2
198
March1st to 10thDay
31%23%32%13%2
240
11th to 20thDay
35%26%26%9%4
240
21st to endDay
25%29%37%7%2
264
April1st to 10thDay
26%23%38%10%3
240
11th to 20thDay
29%19%35%13%4
404
21st to endDay
24%23%34%14%5%1
500
May1st to 10thDay
19%17%41%19%4
603
11th to 20thDay
17%12%39%21%10%2
625
21st to endDay
17%9%35%20%15%3
679
June1st to 10thDay
10%5%25%36%19%5%
630
11th to 20thDay
10%5%29%36%17%3
630
21st to endDay
6%326%38%22%5%
630
July1st to 10thDay
7%219%35%30%8%
621
11th to 20thDay
3216%39%35%6%
618
21st to endDay
3114%40%34%8%
684
August1st to 10thDay
6%114%47%28%4
626
11th to 20thDay
10%316%41%27%4
615
21st to endDay
5%112%38%36%8%
530
September1st to 10thDay
8%210%36%36%9%
292
11th to 20thDay
5%320%39%29%4
270
21st to endDay
14%5%20%40%18%3
270
October1st to 10thDay
7%9%35%33%13%4
270
11th to 20thDay
20%13%35%26%6%
270
21st to endDay
31%16%27%21%6%
297
November1st to 10thDay
15%17%40%22%5%2
270
11th to 20thDay
17%22%35%19%5%2
270
21st to endDay
29%21%33%14%3
270
December1st to 10thDay
25%17%35%18%5%
270
11th to 20thDay
30%19%36%11%4
270
21st to endDay
27%23%35%12%3
297
January1st to 10thNight
18%17%33%26%6%
950
11th to 20thNight
22%18%32%24%4
918
21st to endNight
19%18%32%26%5%
990
February1st to 10thNight
24%21%32%20%3
900
11th to 20thNight
23%22%34%18%3
731
21st to endNight
27%19%33%18%2
526
March1st to 10thNight
22%17%35%22%4
540
11th to 20thNight
24%15%37%19%4
540
21st to endNight
20%18%36%21%5%
594
April1st to 10thNight
18%19%38%21%4
540
11th to 20thNight
19%17%34%25%5%
533
21st to endNight
17%16%38%20%7%1
540
May1st to 10thNight
13%14%36%29%8%
540
11th to 20thNight
14%8%39%27%12%1
531
21st to endNight
9%7%33%31%18%2
584
June1st to 10thNight
6%422%41%24%3
540
11th to 20thNight
7%333%43%15%
540
21st to endNight
3122%44%25%4
540
July1st to 10thNight
6%15%41%33%5%
525
11th to 20thNight
317%47%30%3
522
21st to endNight
4111%45%35%5%
591
August1st to 10thNight
3114%50%29%3
537
11th to 20thNight
6%113%45%30%4
534
21st to endNight
4113%44%34%4
594
September1st to 10thNight
9%313%42%30%3
540
11th to 20thNight
11%318%37%29%3
540
21st to endNight
7%224%38%26%3
540
October1st to 10thNight
9%7%30%31%21%3
634
11th to 20thNight
15%9%33%30%12%1
720
21st to endNight
21%13%29%25%12%1
792
November1st to 10thNight
14%12%36%30%8%
740
11th to 20thNight
15%15%33%29%8%
857
21st to endNight
24%15%30%23%8%
950
December1st to 10thNight
19%15%34%26%5%
950
11th to 20thNight
24%14%33%24%4
950
21st to endNight
23%18%31%23%5%
1045
Page generated at 2024-01-11 03:22:40. Version ac07

Copyright 2024 Attilla Danko


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