Lost Maples State Natural Area
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lost Maples State Natural Area clear sky chart from 2005-11-06 to 2024-01-22.

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
46%
23768
26%
74463
17%
23713
55%
23713
32%
42586

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
37%
946
30%
2458
13%
946
48%
946
36%
1475
January11th to 20thNight
35%
903
28%
2423
11%
903
46%
903
32%
1469
January21st to endNight
35%
800
32%
2400
15%
800
49%
800
28%
1417
February1st to 10thNight
33%
720
30%
2160
12%
720
48%
720
31%
1233
February11th to 20thNight
30%
704
23%
2098
10%
700
41%
700
28%
1235
February21st to endNight
22%
592
28%
1776
8%
592
38%
592
27%
1047
March1st to 10thNight
27%
656
25%
2096
9%
656
42%
656
25%
1284
March11th to 20thNight
31%
540
23%
1980
15%
540
43%
540
22%
1187
March21st to endNight
25%
594
27%
2178
13%
594
44%
594
27%
1189
April1st to 10thNight
25%
540
25%
1980
12%
540
43%
540
26%
1103
April11th to 20thNight
22%
533
25%
1794
10%
533
40%
533
25%
1080
April21st to endNight
22%
540
27%
1777
12%
540
43%
540
27%
1058
May1st to 10thNight
28%
540
25%
1620
15%
540
41%
540
31%
974
May11th to 20thNight
35%
531
21%
1594
16%
531
44%
531
29%
986
May21st to endNight
36%
583
19%
1745
12%
582
48%
582
28%
1110
June1st to 10thNight
61%
540
23%
1620
21%
540
69%
540
49%
815
June11th to 20thNight
50%
540
23%
1620
18%
540
60%
540
45%
861
June21st to endNight
57%
540
24%
1620
23%
540
62%
540
39%
906
July1st to 10thNight
64%
525
15%
1575
15%
525
66%
525
30%
977
July11th to 20thNight
74%
522
29%
1566
29%
522
81%
522
51%
782
July21st to endNight
78%
591
26%
1678
27%
558
83%
558
52%
831
August1st to 10thNight
81%
537
26%
1779
31%
534
84%
534
54%
797
August11th to 20thNight
79%
534
26%
1778
31%
534
82%
534
40%
937
August21st to endNight
72%
594
20%
1988
21%
594
74%
594
33%
1131
September1st to 10thNight
70%
540
19%
1980
23%
540
71%
540
29%
1140
September11th to 20thNight
66%
540
21%
1980
24%
540
69%
540
27%
1168
September21st to endNight
65%
540
25%
1980
26%
540
67%
540
31%
1089
October1st to 10thNight
68%
540
32%
1980
32%
540
71%
540
37%
996
October11th to 20thNight
52%
540
33%
1980
26%
540
61%
540
32%
1052
October21st to endNight
47%
792
34%
2376
20%
792
56%
792
40%
1287
November1st to 10thNight
53%
792
29%
2272
18%
792
58%
792
38%
1332
November11th to 20thNight
49%
950
27%
2470
13%
950
55%
950
39%
1459
November21st to endNight
39%
950
28%
2470
12%
950
47%
950
31%
1570
December1st to 10thNight
44%
950
32%
2470
16%
950
52%
950
37%
1504
December11th to 20thNight
36%
950
27%
2900
12%
949
44%
949
26%
1833
December21st to endNight
37%
1039
19%
4302
14%
1026
46%
1026
24%
2272

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
12%6%25%43445%7%48%
74929
Night
12%6%2442345%7%53%
75037
TransparencyDay
37%410%20%19%10%
74655
Night
33%411%20%19%13%
74831
SeeingDay
15%9%24%31%18%3
13676
Night
16%7%27%35%14%1
23779

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
12%6%24333246%55%
1707
11th to 20thDay
14%7%24323435%52%
1771
21st to endDay
13%6%24323447%54%
1990
February1st to 10thDay
13%7%245%33335%51%
1800
11th to 20thDay
16%8%2443445%6%46%
1749
21st to endDay
15%5%23233346%54%
1480
March1st to 10thDay
17%7%26%423346%44%
1862
11th to 20thDay
15%7%36%323446%47%
1980
21st to endDay
16%5%25%423345%50%
2178
April1st to 10thDay
14%7%35%42345%7%46%
1980
11th to 20thDay
17%6%245%2335%7%46%
2112
21st to endDay
15%6%44424346%48%
2182
May1st to 10thDay
17%5%35%6%3446%6%43%
2340
11th to 20thDay
15%7%26%5%35%46%8%39%
2302
21st to endDay
16%6%36%5%45%5%6%7%36%
2531
June1st to 10thDay
7%425%4345%6%9%50%
2340
11th to 20thDay
9%5%245%35%5%6%8%48%
2340
21st to endDay
10%5%35%6%46%6%7%9%39%
2340
July1st to 10thDay
13%7%36%6%45%6%6%9%35%
2340
11th to 20thDay
7%414435%5%6%8%53%
2340
21st to endDay
6%3234345%6%11%51%
2536
August1st to 10thDay
32134345%6%8%61%
2149
11th to 20thDay
7%4245%45%5%6%9%49%
2123
21st to endDay
8%5%25%5%46%5%6%9%44%
2368
September1st to 10thDay
12%6%37%7%45%5%6%6%40%
1980
11th to 20thDay
11%6%26%6%46%6%6%7%41%
1980
21st to endDay
9%6%26%5%35%5%5%7%46%
1980
October1st to 10thDay
8%5%25%5%25%45%8%51%
1980
11th to 20thDay
14%5%2443345%6%51%
1962
21st to endDay
13%5%2442233457%
1980
November1st to 10thDay
14%7%25%423446%48%
1801
11th to 20thDay
12%7%24434446%50%
1710
21st to endDay
16%7%25%423345%49%
1710
December1st to 10thDay
14%6%25%32345%5%50%
1710
11th to 20thDay
14%8%34433445%47%
2161
21st to endDay
13%6%2331234458%
3135
January1st to 10thNight
13%5%24423435%55%
2458
11th to 20thNight
14%6%34323345%53%
2423
21st to endNight
16%7%2442235%5%51%
2400
February1st to 10thNight
14%6%24313346%53%
2160
11th to 20thNight
15%7%24423345%51%
2098
21st to endNight
15%5%24424447%49%
1776
March1st to 10thNight
15%8%25%42345%7%46%
2096
11th to 20thNight
15%7%35%5%2444447%
1980
21st to endNight
13%6%2432345%6%52%
2178
April1st to 10thNight
10%7%25%424447%51%
1980
11th to 20thNight
15%5%35%434446%48%
1794
21st to endNight
16%6%24423346%49%
1777
May1st to 10thNight
13%5%25%42445%8%48%
1620
11th to 20thNight
14%6%35%5%23446%46%
1593
21st to endNight
15%7%2342345%9%44%
1745
June1st to 10thNight
421332447%9%61%
1620
11th to 20thNight
5%3224245%6%8%59%
1620
21st to endNight
7%42443436%10%52%
1620
July1st to 10thNight
10%425%445%5%7%9%44%
1620
11th to 20thNight
431322445%9%63%
1620
21st to endNight
5%3133235%5%10%61%
1777
August1st to 10thNight
321331245%8%69%
1790
11th to 20thNight
5%3244345%6%10%54%
1778
21st to endNight
7%5%24425%5%6%10%49%
1988
September1st to 10thNight
10%5%25%335%45%9%48%
1980
11th to 20thNight
11%7%25%4345%5%7%46%
1980
21st to endNight
8%5%245%345%5%8%51%
1980
October1st to 10thNight
7%5%23423348%58%
1980
11th to 20thNight
14%41442335%6%54%
1980
21st to endNight
15%42331223462%
2376
November1st to 10thNight
12%7%14323346%56%
2272
11th to 20thNight
10%7%23423346%56%
2470
21st to endNight
17%6%2332445%6%49%
2470
December1st to 10thNight
14%6%23323346%54%
2470
11th to 20thNight
15%8%34424245%49%
3036
21st to endNight
17%7%13222237%55%
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
33%2419%23%20%
1708
11th to 20thDay
37%26%15%22%18%
1771
21st to endDay
33%37%14%25%18%
1990
February1st to 10thDay
38%35%12%22%19%
1800
11th to 20thDay
41%45%16%19%15%
1759
21st to endDay
34%37%16%22%19%
1480
March1st to 10thDay
43%38%15%18%13%
1862
11th to 20thDay
41%37%14%16%18%
1980
21st to endDay
38%37%18%19%15%
2178
April1st to 10thDay
39%48%16%18%13%
1980
11th to 20thDay
39%36%19%18%14%
2112
21st to endDay
40%36%19%18%13%
2182
May1st to 10thDay
42%49%16%21%8%
2340
11th to 20thDay
44%5%10%20%18%4
2306
21st to endDay
47%5%10%21%14%2
2531
June1st to 10thDay
31%5%14%27%20%3
2340
11th to 20thDay
35%5%12%26%16%5%
2340
21st to endDay
40%7%11%23%15%4
2340
July1st to 10thDay
43%7%15%23%11%1
2276
11th to 20thDay
27%6%16%29%20%2
2271
21st to endDay
24%6%23%33%13%
2395
August1st to 10thDay
20%5%16%40%18%1
2136
11th to 20thDay
31%7%17%30%12%3
2123
21st to endDay
35%7%15%27%13%3
2368
September1st to 10thDay
44%6%10%18%16%5%
1980
11th to 20thDay
40%7%12%20%16%5%
1980
21st to endDay
37%5%10%20%19%10%
1980
October1st to 10thDay
32%410%23%23%8%
1980
11th to 20thDay
35%48%16%21%16%
1962
21st to endDay
33%3416%25%20%
1980
November1st to 10thDay
39%48%20%18%11%
1801
11th to 20thDay
37%46%17%20%16%
1710
21st to endDay
41%35%16%21%15%
1710
December1st to 10thDay
36%49%18%23%10%
1710
11th to 20thDay
41%45%12%21%17%
2159
21st to endDay
32%2416%29%17%
3135
January1st to 10thNight
33%2415%24%22%
2458
11th to 20thNight
35%35%17%22%18%
2423
21st to endNight
38%25%14%21%21%
2400
February1st to 10thNight
34%37%13%22%21%
2160
11th to 20thNight
36%36%17%21%18%
2098
21st to endNight
36%37%14%20%19%
1776
March1st to 10thNight
40%38%16%19%14%
2096
11th to 20thNight
41%46%13%17%19%
1980
21st to endNight
33%411%18%18%17%
2178
April1st to 10thNight
34%410%17%17%16%
1980
11th to 20thNight
39%49%14%18%17%
1794
21st to endNight
38%39%19%18%13%
1777
May1st to 10thNight
36%413%19%17%11%
1620
11th to 20thNight
39%411%24%17%5%
1594
21st to endNight
38%7%15%25%13%2
1746
June1st to 10thNight
19%6%19%32%20%3
1620
11th to 20thNight
24%5%15%29%21%6%
1620
21st to endNight
28%5%18%28%16%4
1620
July1st to 10thNight
35%9%20%26%10%1
1575
11th to 20thNight
19%5%19%32%22%2
1566
21st to endNight
17%6%27%37%12%1
1678
August1st to 10thNight
16%5%21%39%18%1
1779
11th to 20thNight
23%8%22%29%15%3
1778
21st to endNight
30%8%21%25%14%3
1988
September1st to 10thNight
34%7%13%22%18%6%
1980
11th to 20thNight
36%7%17%20%15%4
1980
21st to endNight
32%6%12%21%19%10%
1980
October1st to 10thNight
27%412%26%20%11%
1980
11th to 20thNight
32%310%17%21%15%
1980
21st to endNight
29%15%17%25%22%
2376
November1st to 10thNight
32%38%20%23%13%
2272
11th to 20thNight
31%37%21%20%17%
2470
21st to endNight
37%47%15%20%17%
2470
December1st to 10thNight
33%49%19%22%14%
2470
11th to 20thNight
40%25%14%17%22%
3037
21st to endNight
34%2414%28%18%
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
24%14%37%18%6%1
270
11th to 20thDay
25%14%33%20%6%1
270
21st to endDay
19%21%34%21%4
267
February1st to 10thDay
28%13%33%19%8%
240
11th to 20thDay
29%16%32%17%5%
240
21st to endDay
26%22%37%14%1
198
March1st to 10thDay
21%22%41%14%2
240
11th to 20thDay
23%20%39%14%3
240
21st to endDay
20%20%44%13%21
264
April1st to 10thDay
23%18%38%19%1
240
11th to 20thDay
19%18%41%18%4
390
21st to endDay
18%16%44%19%3
442
May1st to 10thDay
21%10%40%23%5%
603
11th to 20thDay
20%10%33%29%7%1
625
21st to endDay
20%10%32%28%10%
679
June1st to 10thDay
7%421%47%20%1
630
11th to 20thDay
11%322%46%16%1
630
21st to endDay
12%317%37%26%6%
630
July1st to 10thDay
12%412%36%29%6%
621
11th to 20thDay
6%17%43%38%5%
618
21st to endDay
5%17%43%37%7%
674
August1st to 10thDay
26%47%38%7%
447
11th to 20thDay
8%18%37%38%8%
437
21st to endDay
6%36%35%40%10%
487
September1st to 10thDay
10%19%31%39%9%
270
11th to 20thDay
7%6%33%47%7%
270
21st to endDay
10%210%35%37%6%
270
October1st to 10thDay
9%5%16%41%26%4
270
11th to 20thDay
13%423%39%19%2
270
21st to endDay
21%14%26%25%11%2
297
November1st to 10thDay
19%7%34%27%11%1
270
11th to 20thDay
21%10%30%24%10%4
270
21st to endDay
27%17%32%15%8%1
270
December1st to 10thDay
17%15%29%28%10%1
270
11th to 20thDay
21%20%31%21%6%
270
21st to endDay
17%16%33%26%6%1
297
January1st to 10thNight
17%11%30%33%7%1
950
11th to 20thNight
21%10%30%32%7%
903
21st to endNight
22%11%29%31%7%
800
February1st to 10thNight
21%12%31%29%6%
720
11th to 20thNight
22%13%33%28%4
704
21st to endNight
22%13%41%22%2
592
March1st to 10thNight
24%12%35%26%4
656
11th to 20thNight
21%10%34%30%5%
540
21st to endNight
20%10%43%23%4
594
April1st to 10thNight
11%14%46%25%3
540
11th to 20thNight
18%14%44%22%2
533
21st to endNight
20%10%46%20%4
540
May1st to 10thNight
15%11%44%25%4
540
11th to 20thNight
17%7%36%33%6%
531
21st to endNight
17%7%35%33%8%
584
June1st to 10thNight
5%228%49%15%
540
11th to 20thNight
9%236%45%9%
540
21st to endNight
9%325%42%19%1
540
July1st to 10thNight
10%314%50%22%1
525
11th to 20thNight
5%215%51%26%2
522
21st to endNight
6%110%54%28%2
591
August1st to 10thNight
3110%52%33%1
537
11th to 20thNight
5%17%50%36%1
534
21st to endNight
8%29%42%36%3
594
September1st to 10thNight
10%19%43%34%3
540
11th to 20thNight
13%111%40%33%2
540
21st to endNight
9%314%37%31%4
540
October1st to 10thNight
9%314%44%28%1
540
11th to 20thNight
17%5%22%36%19%2
540
21st to endNight
17%8%25%28%19%2
792
November1st to 10thNight
17%5%21%38%18%2
792
11th to 20thNight
14%8%24%37%15%2
950
21st to endNight
21%10%26%31%11%1
950
December1st to 10thNight
18%7%27%36%11%1
950
11th to 20thNight
23%11%27%31%8%
950
21st to endNight
19%11%28%34%8%
1045
Page generated at 2024-01-19 08:28:31. Version ac07

Copyright 2024 Attilla Danko


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