Great Northern Moose Lodge
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Great Northern Moose Lodge clear sky chart from 2005-11-06 to 2024-01-27.

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
30%
22713
12%
74886
8%
22669
36%
22669
13%
54905

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
18%
760
9%
2649
4%
757
24%
757
8%
2063
January11th to 20thNight
18%
760
8%
2660
4%
760
23%
760
6%
2122
January21st to endNight
17%
820
11%
2868
4%
820
27%
820
9%
2150
February1st to 10thNight
16%
720
10%
2416
4%
720
24%
720
8%
1879
February11th to 20thNight
17%
703
11%
2100
4%
700
25%
700
9%
1621
February21st to endNight
19%
592
14%
1776
5%
592
31%
592
12%
1351
March1st to 10thNight
18%
720
14%
2160
7%
720
27%
720
11%
1680
March11th to 20thNight
24%
720
12%
2064
6%
720
31%
720
14%
1536
March21st to endNight
26%
792
18%
2057
7%
792
33%
792
15%
1563
April1st to 10thNight
23%
720
13%
1800
4%
720
28%
720
15%
1415
April11th to 20thNight
28%
655
14%
1719
5%
655
33%
655
19%
1239
April21st to endNight
25%
540
14%
1620
6%
540
31%
540
14%
1201
May1st to 10thNight
29%
540
13%
1620
7%
540
33%
540
15%
1184
May11th to 20thNight
32%
413
17%
1475
13%
413
42%
413
17%
998
May21st to endNight
41%
389
12%
1551
12%
388
49%
388
15%
1036
June1st to 10thNight
34%
360
10%
1440
11%
360
41%
360
13%
1023
June11th to 20thNight
45%
360
11%
1440
15%
360
50%
360
18%
924
June21st to endNight
45%
360
8%
1440
10%
360
50%
360
15%
1006
July1st to 10thNight
49%
350
12%
1400
16%
350
53%
350
18%
902
July11th to 20thNight
55%
348
14%
1392
19%
348
58%
348
20%
866
July21st to endNight
58%
394
14%
1486
18%
372
61%
372
20%
940
August1st to 10thNight
50%
420
13%
1484
13%
418
53%
418
22%
920
August11th to 20thNight
48%
532
15%
1596
11%
532
51%
532
23%
1071
August21st to endNight
49%
744
17%
1932
10%
744
52%
744
29%
1292
September1st to 10thNight
50%
720
15%
1800
7%
720
53%
720
30%
1210
September11th to 20thNight
47%
720
20%
1975
12%
720
51%
720
28%
1277
September21st to endNight
44%
720
20%
1980
14%
720
48%
720
26%
1333
October1st to 10thNight
38%
720
15%
1980
9%
720
43%
720
18%
1432
October11th to 20thNight
32%
720
13%
2256
7%
720
39%
720
16%
1626
October21st to endNight
24%
792
10%
2574
6%
792
30%
792
11%
1975
November1st to 10thNight
30%
740
14%
2407
10%
740
36%
740
14%
1718
November11th to 20thNight
25%
760
18%
2470
11%
760
35%
760
12%
1833
November21st to endNight
24%
760
11%
2546
6%
760
31%
760
9%
1966
December1st to 10thNight
16%
760
7%
2660
3%
760
21%
760
7%
2169
December11th to 20thNight
18%
760
9%
3250
4%
759
24%
759
5%
2591
December21st to endNight
15%
829
6%
4843
3%
817
22%
817
4%
3793

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
16%10%48%7%45%5%5%7%28%
74905
Night
15%10%48%7%45%5%6%7%29%
75136
TransparencyDay
54%6%11%18%9%1
74610
Night
54%7%11%18%9%1
74965
SeeingDay
23%18%28%18%10%3
13729
Night
22%15%25%27%10%1
22720

By Month

Percentage Cloud Cover NE (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%11%5%15%9%46%7%5%7%18%
1517
11th to 20thDay
13%12%6%9%11%5%6%5%6%5%21%
1520
21st to endDay
9%10%6%10%10%46%5%7%7%26%
1632
February1st to 10thDay
13%13%6%10%10%5%8%5%46%21%
1542
11th to 20thDay
9%13%7%13%9%5%6%6%5%6%21%
1748
21st to endDay
13%14%410%8%5%6%5%6%6%23%
1480
March1st to 10thDay
12%13%6%10%8%6%6%5%46%25%
1797
11th to 20thDay
14%11%5%8%8%3445%5%31%
1895
21st to endDay
13%13%6%11%8%35%43430%
2295
April1st to 10thDay
18%15%6%9%6%4443428%
2160
11th to 20thDay
16%10%47%6%35%5%5%6%33%
2190
21st to endDay
19%14%5%8%7%34445%26%
2340
May1st to 10thDay
22%12%47%5%34446%30%
2340
11th to 20thDay
20%10%47%5%3445%6%32%
2433
21st to endDay
15%7%47%5%36%6%7%8%31%
2725
June1st to 10thDay
24%9%37%6%445%6%7%25%
2520
11th to 20thDay
17%7%36%6%45%5%6%8%32%
2520
21st to endDay
21%8%47%7%36%6%6%7%25%
2520
July1st to 10thDay
16%7%37%6%37%5%6%9%31%
2520
11th to 20thDay
14%6%37%7%48%6%7%10%30%
2520
21st to endDay
15%7%46%6%47%7%7%8%29%
2744
August1st to 10thDay
14%7%37%6%46%6%6%9%32%
2427
11th to 20thDay
14%6%37%7%46%7%8%9%29%
2304
21st to endDay
14%6%36%5%45%6%8%9%35%
2422
September1st to 10thDay
13%6%27%6%36%6%5%8%39%
2160
11th to 20thDay
16%7%36%5%34346%44%
1985
21st to endDay
14%8%36%6%345%6%7%37%
1980
October1st to 10thDay
20%10%47%6%4445%6%30%
1980
11th to 20thDay
14%12%49%6%35%5%6%6%31%
1698
21st to endDay
19%17%5%8%6%45%446%23%
1782
November1st to 10thDay
13%12%5%8%6%345%5%7%30%
1671
11th to 20thDay
15%11%5%11%7%36%6%6%6%24%
1710
21st to endDay
15%13%5%10%6%446%6%7%24%
1630
December1st to 10thDay
17%16%8%11%8%45%5%5%418%
1520
11th to 20thDay
17%15%6%9%6%45%445%25%
1906
21st to endDay
20%13%5%14%8%45%44418%
2772
January1st to 10thNight
11%10%5%12%10%5%7%6%8%8%17%
2649
11th to 20thNight
13%13%7%11%9%47%6%6%5%19%
2660
21st to endNight
10%8%5%10%10%5%6%8%8%8%22%
2868
February1st to 10thNight
11%12%6%9%10%5%8%7%7%8%20%
2416
11th to 20thNight
9%10%7%10%10%5%7%8%6%7%22%
2098
21st to endNight
11%13%5%10%9%5%6%45%5%28%
1776
March1st to 10thNight
11%13%8%8%9%47%5%45%25%
2150
11th to 20thNight
13%11%5%8%7%36%6%5%5%30%
2063
21st to endNight
13%12%5%9%7%35%5%45%31%
2057
April1st to 10thNight
18%13%5%8%7%45%5%45%28%
1800
11th to 20thNight
16%9%47%6%3446%6%34%
1719
21st to endNight
20%9%49%5%35%36%5%30%
1620
May1st to 10thNight
19%13%35%6%446%5%6%30%
1620
11th to 20thNight
19%8%36%6%3435%8%34%
1474
21st to endNight
15%8%35%6%45%5%7%7%36%
1550
June1st to 10thNight
22%8%5%6%5%35%45%6%31%
1440
11th to 20thNight
16%8%35%6%35%46%9%36%
1440
21st to endNight
17%7%37%6%46%5%7%9%30%
1440
July1st to 10thNight
13%7%26%5%36%5%7%9%36%
1440
11th to 20thNight
14%6%35%5%345%7%9%39%
1440
21st to endNight
12%5%36%7%36%46%9%39%
1574
August1st to 10thNight
13%6%35%6%35%5%6%7%40%
1494
11th to 20thNight
13%8%25%6%345%6%8%39%
1596
21st to endNight
14%6%25%5%3445%8%44%
1932
September1st to 10thNight
13%6%25%5%346%6%7%44%
1800
11th to 20thNight
15%7%25%43435%6%46%
1975
21st to endNight
14%8%35%5%445%5%7%42%
1980
October1st to 10thNight
17%10%46%5%346%6%6%33%
1980
11th to 20thNight
16%11%36%6%45%6%5%8%30%
2256
21st to endNight
21%12%36%7%35%5%7%6%24%
2574
November1st to 10thNight
15%11%48%6%346%6%7%29%
2407
11th to 20thNight
14%10%6%10%7%445%6%7%28%
2470
21st to endNight
14%9%5%11%9%5%6%6%6%5%25%
2546
December1st to 10thNight
18%14%6%10%8%46%6%6%7%17%
2660
11th to 20thNight
17%14%5%11%8%46%5%6%6%19%
3288
21st to endNight
20%13%413%7%45%5%5%5%18%
4884

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
65%6%8%15%7%
1518
11th to 20thDay
64%6%8%13%8%2
1520
21st to endDay
56%6%10%15%12%2
1632
February1st to 10thDay
64%6%8%13%8%1
1542
11th to 20thDay
63%5%10%12%7%2
1757
21st to endDay
59%7%10%13%9%3
1480
March1st to 10thDay
61%5%9%12%9%3
1800
11th to 20thDay
54%5%10%14%13%4
1895
21st to endDay
59%47%16%11%3
2295
April1st to 10thDay
60%48%15%10%3
2160
11th to 20thDay
51%5%11%20%12%1
2190
21st to endDay
60%5%8%15%8%3
2340
May1st to 10thDay
57%5%6%20%11%1
2340
11th to 20thDay
53%6%9%17%13%2
2437
21st to endDay
48%9%13%20%10%1
2725
June1st to 10thDay
56%7%11%19%6%1
2520
11th to 20thDay
49%6%11%21%11%1
2520
21st to endDay
56%8%10%17%7%1
2520
July1st to 10thDay
48%7%14%21%10%
2450
11th to 20thDay
47%9%13%23%7%
2445
21st to endDay
49%8%14%21%7%
2591
August1st to 10thDay
47%10%14%22%7%
2413
11th to 20thDay
47%8%16%20%8%
2304
21st to endDay
41%8%15%22%13%1
2422
September1st to 10thDay
42%7%13%26%12%
2160
11th to 20thDay
42%410%28%14%2
1985
21st to endDay
44%6%13%23%12%1
1980
October1st to 10thDay
55%5%12%18%9%1
1980
11th to 20thDay
52%7%13%22%7%
1698
21st to endDay
63%411%12%8%1
1782
November1st to 10thDay
52%5%12%18%11%1
1671
11th to 20thDay
60%7%10%12%10%2
1710
21st to endDay
58%6%15%15%5%1
1630
December1st to 10thDay
69%6%7%11%5%1
1520
11th to 20thDay
61%5%7%13%12%1
1906
21st to endDay
69%6%7%10%8%1
2772
January1st to 10thNight
62%7%12%13%6%
2649
11th to 20thNight
67%6%10%13%5%1
2660
21st to endNight
57%9%10%13%10%1
2868
February1st to 10thNight
60%8%10%13%8%1
2416
11th to 20thNight
59%7%10%14%8%1
2100
21st to endNight
57%6%9%15%11%2
1776
March1st to 10thNight
61%6%6%16%9%2
2160
11th to 20thNight
55%6%12%14%11%2
2064
21st to endNight
56%5%7%19%12%3
2057
April1st to 10thNight
59%5%8%15%12%1
1800
11th to 20thNight
49%6%10%22%12%1
1719
21st to endNight
56%5%10%16%10%2
1620
May1st to 10thNight
54%6%7%19%13%1
1620
11th to 20thNight
49%6%9%21%13%2
1475
21st to endNight
47%8%13%22%9%1
1551
June1st to 10thNight
55%7%9%21%8%
1440
11th to 20thNight
45%7%13%23%10%2
1440
21st to endNight
48%11%14%18%8%
1440
July1st to 10thNight
42%10%14%21%12%
1400
11th to 20thNight
40%9%16%28%7%
1392
21st to endNight
42%8%15%25%9%1
1486
August1st to 10thNight
41%7%17%30%6%
1484
11th to 20thNight
41%10%19%20%10%
1596
21st to endNight
39%7%15%27%12%
1932
September1st to 10thNight
37%8%15%29%11%
1800
11th to 20thNight
39%6%11%30%13%1
1975
21st to endNight
42%7%13%26%11%1
1980
October1st to 10thNight
50%7%11%20%11%1
1980
11th to 20thNight
52%8%13%21%6%1
2256
21st to endNight
59%7%11%13%9%1
2574
November1st to 10thNight
53%6%12%19%9%1
2407
11th to 20thNight
56%6%10%17%9%2
2470
21st to endNight
58%9%11%16%6%
2546
December1st to 10thNight
66%8%9%12%4
2660
11th to 20thNight
66%7%8%12%8%
3288
21st to endNight
67%6%8%14%5%
4884

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
25%22%32%16%6%
180
11th to 20thDay
27%28%23%17%41
180
21st to endDay
17%24%34%20%5%1
188
February1st to 10thDay
30%28%25%13%4
241
11th to 20thDay
28%28%28%14%1
416
21st to endDay
27%24%26%19%3
346
March1st to 10thDay
24%22%34%17%4
420
11th to 20thDay
29%23%27%14%5%1
420
21st to endDay
27%19%27%17%8%3
462
April1st to 10thDay
33%20%25%15%5%2
420
11th to 20thDay
28%22%23%17%7%3
412
21st to endDay
29%23%25%14%8%2
420
May1st to 10thDay
36%18%24%14%5%3
423
11th to 20thDay
23%17%35%14%8%2
447
21st to endDay
18%16%35%21%7%2
485
June1st to 10thDay
27%16%31%17%8%2
450
11th to 20thDay
19%18%28%20%12%2
450
21st to endDay
20%12%35%19%10%4
450
July1st to 10thDay
20%10%32%22%12%3
445
11th to 20thDay
16%10%34%25%11%4
444
21st to endDay
15%10%34%26%12%2
488
August1st to 10thDay
14%9%31%24%17%4
446
11th to 20thDay
15%9%32%23%15%6%
439
21st to endDay
15%15%26%22%15%6%
495
September1st to 10thDay
15%13%26%21%21%4
450
11th to 20thDay
20%12%27%16%14%10%
450
21st to endDay
16%14%26%20%16%7%
450
October1st to 10thDay
22%15%22%20%15%4
450
11th to 20thDay
21%19%26%19%12%3
383
21st to endDay
28%21%25%17%8%
396
November1st to 10thDay
27%17%25%21%10%1
365
11th to 20thDay
29%21%24%17%8%1
370
21st to endDay
30%19%28%14%8%1
290
December1st to 10thDay
27%27%25%12%9%
180
11th to 20thDay
31%22%30%11%5%2
180
21st to endDay
33%22%27%13%41
198
January1st to 10thNight
21%20%31%23%4
760
11th to 20thNight
24%19%27%25%4
760
21st to endNight
18%20%32%25%5%
820
February1st to 10thNight
20%21%33%22%4
720
11th to 20thNight
20%22%29%24%3
703
21st to endNight
22%21%30%25%2
592
March1st to 10thNight
22%18%33%25%2
720
11th to 20thNight
25%18%28%23%7%
720
21st to endNight
21%19%27%24%8%1
792
April1st to 10thNight
28%17%28%20%6%
720
11th to 20thNight
22%16%27%27%8%
655
21st to endNight
27%16%26%23%7%
540
May1st to 10thNight
25%13%26%25%10%1
540
11th to 20thNight
19%11%28%31%9%1
413
21st to endNight
15%8%25%36%15%1
389
June1st to 10thNight
26%8%25%30%11%1
360
11th to 20thNight
17%7%25%31%19%1
360
21st to endNight
19%6%20%40%14%
360
July1st to 10thNight
14%325%38%19%1
350
11th to 20thNight
15%418%39%22%2
348
21st to endNight
13%316%46%20%2
394
August1st to 10thNight
15%6%18%37%24%
420
11th to 20thNight
14%6%23%35%21%1
532
21st to endNight
16%7%20%33%22%2
744
September1st to 10thNight
14%7%22%35%20%2
720
11th to 20thNight
19%9%19%28%22%4
720
21st to endNight
17%9%23%30%18%3
720
October1st to 10thNight
24%11%19%29%17%1
720
11th to 20thNight
21%14%27%25%12%2
720
21st to endNight
28%17%25%25%5%
792
November1st to 10thNight
22%17%22%28%10%
740
11th to 20thNight
22%19%26%22%10%1
760
21st to endNight
25%20%21%26%6%2
760
December1st to 10thNight
28%21%25%20%5%
760
11th to 20thNight
28%20%25%21%5%
760
21st to endNight
28%20%26%22%3
836
Page generated at 2024-01-24 09:37:28. Version ac07

Copyright 2024 Attilla Danko


Great Northern Moose Lodge Clear Sky Chart |Charts Home