Moosonee / Moose Factory
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Moosonee / Moose Factory clear sky chart from 2005-11-05 to 2018-04-23.

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%
16061
7%
49563
5%
16030
33%
16030
10%
39588

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 15thNight
24%
974
3%
2910
2%
970
25%
970
5%
2598
January16th to endNight
32%
1040
5%
3065
3%
1040
35%
1040
6%
2622
February1st to 15thNight
35%
806
8%
2524
7%
803
37%
803
9%
2098
February16th to endNight
29%
683
6%
2220
5%
683
31%
683
8%
1831
March1st to 15thNight
33%
780
10%
2226
9%
780
34%
780
12%
1796
March16th to endNight
35%
832
11%
2288
7%
832
38%
832
14%
1791
April1st to 15thNight
34%
665
12%
1849
8%
665
37%
665
15%
1429
April16th to endNight
29%
558
15%
1672
8%
558
37%
558
16%
1206
May1st to 15thNight
31%
360
10%
1422
9%
360
37%
360
11%
1003
May16th to endNight
34%
374
5%
1310
2%
374
36%
374
12%
962
June1st to 15thNight
38%
360
1%
1260
0%
360
38%
360
16%
848
June16th to endNight
45%
360
0%
1260
0%
360
45%
360
17%
832
July1st to 15thNight
43%
340
1%
1190
1%
340
43%
340
15%
833
July16th to endNight
47%
376
6%
1240
5%
354
51%
354
15%
854
August1st to 15thNight
47%
465
6%
1484
6%
463
49%
463
14%
1087
August16th to endNight
41%
573
11%
1719
8%
573
44%
573
16%
1264
September1st to 15thNight
36%
678
9%
1775
3%
678
38%
678
19%
1301
September16th to endNight
34%
717
10%
1994
6%
717
36%
717
17%
1497
October1st to 15thNight
27%
720
11%
2160
6%
720
32%
720
13%
1671
October16th to endNight
25%
768
6%
2481
5%
768
27%
768
8%
2112
November1st to 15thNight
14%
760
6%
2662
3%
760
19%
760
6%
2255
November16th to endNight
15%
857
5%
2807
2%
857
18%
857
5%
2407
December1st to 15thNight
20%
975
2%
2925
1%
975
21%
975
6%
2571
December16th to endNight
23%
1040
6%
3120
4%
1040
25%
1040
6%
2720

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
18%12%48%6%35%445%24%
49992
Night
17%13%5%8%7%46%5%45%21%
49710
TransparencyDay
59%6%11%15%5%
49656
Night
63%6%11%13%4
49564
SeeingDay
22%10%19%28%14%4
6688
Night
20%17%20%27%12%2
16063

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 15thDay
14%18%7%11%9%5%7%5%6%5%8%
1358
16th to endDay
10%15%6%11%9%5%10%9%8%39%
1511
February1st to 15thDay
7%12%6%11%10%5%8%9%7%5%15%
1668
16th to endDay
11%15%6%10%8%47%7%5%6%16%
1539
March1st to 15thDay
13%13%411%8%5%7%6%5%5%18%
2052
16th to endDay
11%12%47%6%5%7%5%5%6%26%
2288
April1st to 15thDay
18%13%6%7%7%3434425%
2441
16th to endDay
16%10%5%6%5%33345%33%
2402
May1st to 15thDay
21%11%47%5%35%435%27%
2527
16th to endDay
22%11%46%5%34336%27%
2804
June1st to 15thDay
19%7%36%42435%7%36%
2700
16th to endDay
16%6%36%6%34446%37%
2700
July1st to 15thDay
21%7%36%5%345%47%31%
2700
16th to endDay
16%7%36%6%35%45%8%30%
2844
August1st to 15thDay
20%9%37%6%35%45%7%25%
2466
16th to endDay
21%9%36%5%345%5%7%26%
2483
September1st to 15thDay
20%9%36%6%34446%29%
2172
16th to endDay
27%10%35%5%33345%27%
1965
October1st to 15thDay
26%13%47%5%33335%23%
1800
16th to endDay
25%18%49%6%34435%15%
1743
November1st to 15thDay
27%19%7%8%42333414%
1526
16th to endDay
24%19%7%9%5%35%32315%
1482
December1st to 15thDay
14%18%8%11%8%46%5%35%12%
1365
16th to endDay
12%17%8%12%10%5%6%6%5%411%
1456
January1st to 15thNight
14%18%6%12%8%5%9%7%427%
2910
16th to endNight
11%13%6%10%9%6%10%9%6%410%
3065
February1st to 15thNight
7%11%5%10%11%6%12%9%6%414%
2522
16th to endNight
9%16%6%11%8%48%7%5%5%15%
2220
March1st to 15thNight
12%11%5%10%8%5%7%7%5%5%20%
2214
16th to endNight
11%11%48%8%5%8%5%4426%
2288
April1st to 15thNight
19%10%48%6%35%45%6%25%
1849
16th to endNight
14%13%47%6%34345%34%
1672
May1st to 15thNight
20%10%36%5%345%5%6%29%
1422
16th to endNight
22%7%46%6%35%45%6%28%
1309
June1st to 15thNight
17%8%36%5%22446%38%
1260
16th to endNight
14%5%25%6%35%5%6%8%35%
1260
July1st to 15thNight
19%7%346%345%6%7%32%
1260
16th to endNight
14%6%36%5%36%6%7%9%32%
1324
August1st to 15thNight
20%8%25%5%3445%7%30%
1492
16th to endNight
19%7%26%5%35%5%6%7%29%
1719
September1st to 15thNight
22%8%25%334437%33%
1775
16th to endNight
24%9%35%424345%31%
1994
October1st to 15thNight
22%9%38%6%44435%26%
2160
16th to endNight
25%17%49%6%3434416%
2481
November1st to 15thNight
25%19%6%9%6%3423416%
2662
16th to endNight
23%19%7%9%7%2343315%
2807
December1st to 15thNight
14%18%9%13%6%46%5%4411%
2925
16th to endNight
13%18%8%12%8%46%6%4412%
3120

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 15thDay
74%48%9%2
1359
16th to endDay
71%6%8%8%4
1511
February1st to 15thDay
64%5%11%15%3
1670
16th to endDay
66%7%12%10%2
1539
March1st to 15thDay
66%6%10%14%3
2063
16th to endDay
58%5%12%13%9%
2288
April1st to 15thDay
62%47%15%9%
2441
16th to endDay
52%5%9%18%12%1
2402
May1st to 15thDay
58%5%8%16%9%
2527
16th to endDay
57%6%12%17%6%
2808
June1st to 15thDay
48%410%23%13%
2700
16th to endDay
46%6%11%22%12%
2700
July1st to 15thDay
51%7%12%22%6%
2541
16th to endDay
50%9%17%19%3
2665
August1st to 15thDay
56%8%16%14%3
2450
16th to endDay
54%9%15%18%3
2483
September1st to 15thDay
54%8%17%15%3
2172
16th to endDay
59%5%12%17%4
1965
October1st to 15thDay
65%412%12%4
1800
16th to endDay
71%5%11%10%1
1743
November1st to 15thDay
73%5%8%9%2
1526
16th to endDay
75%48%10%1
1482
December1st to 15thDay
71%8%10%8%1
1365
16th to endDay
72%6%9%9%2
1456
January1st to 15thNight
77%6%8%6%1
2910
16th to endNight
71%6%10%8%1
3065
February1st to 15thNight
68%6%8%12%4
2524
16th to endNight
68%5%11%11%2
2220
March1st to 15thNight
63%6%9%14%5%
2226
16th to endNight
60%49%13%10%
2288
April1st to 15thNight
59%47%16%10%
1849
16th to endNight
53%37%19%14%
1672
May1st to 15thNight
54%5%10%17%10%1
1422
16th to endNight
55%6%13%14%8%
1311
June1st to 15thNight
47%5%8%20%15%1
1260
16th to endNight
46%6%14%20%10%1
1260
July1st to 15thNight
49%8%13%20%8%
1190
16th to endNight
47%9%19%19%3
1240
August1st to 15thNight
51%9%17%16%4
1484
16th to endNight
50%9%16%20%3
1719
September1st to 15thNight
49%7%18%18%5%
1775
16th to endNight
54%6%14%19%4
1994
October1st to 15thNight
59%6%13%16%4
2160
16th to endNight
71%6%9%10%2
2481
November1st to 15thNight
73%410%9%2
2662
16th to endNight
72%6%10%8%1
2807
December1st to 15thNight
74%7%9%6%1
2925
16th to endNight
74%6%8%8%1
3120

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 15thDay
18%8%25%22%20%4
90
16th to endDay
27%21%27%18%4
109
February1st to 15thDay
14%20%42%23%
135
16th to endDay
24%5%25%35%7%1
120
March1st to 15thDay
16%11%17%30%18%6%
258
16th to endDay
11%13%26%31%14%2
352
April1st to 15thDay
13%11%24%27%15%6%
330
16th to endDay
24%13%16%26%13%5%
289
May1st to 15thDay
27%14%20%18%12%6%
304
16th to endDay
24%14%17%26%13%3
517
June1st to 15thDay
20%13%21%29%12%3
495
16th to endDay
16%15%18%26%17%5%
495
July1st to 15thDay
22%10%19%30%15%2
475
16th to endDay
16%14%15%34%15%3
515
August1st to 15thDay
24%8%12%27%19%7%
367
16th to endDay
26%8%12%25%20%6%
332
September1st to 15thDay
22%7%19%33%16%
315
16th to endDay
25%8%22%27%12%2
314
October1st to 15thDay
30%10%22%24%9%3
315
16th to endDay
34%7%21%25%9%2
195
November1st to 15thDay
38%6%18%28%6%
90
16th to endDay
41%5%33%15%13
90
December1st to 15thDay
31%5%12%25%23%2
90
16th to endDay
11%5%32%28%17%5%
96
January1st to 15thNight
17%18%22%26%12%1
975
16th to endNight
15%18%17%27%16%4
1040
February1st to 15thNight
11%16%18%36%15%1
806
16th to endNight
20%17%16%27%16%2
683
March1st to 15thNight
13%18%20%30%15%2
780
16th to endNight
12%17%22%33%12%1
832
April1st to 15thNight
16%18%19%32%10%1
665
16th to endNight
19%19%22%24%10%3
558
May1st to 15thNight
21%19%22%23%11%1
360
16th to endNight
19%21%18%26%11%2
375
June1st to 15thNight
21%18%16%30%11%1
360
16th to endNight
12%17%15%33%19%1
360
July1st to 15thNight
19%13%16%35%13%2
340
16th to endNight
15%17%11%35%17%1
376
August1st to 15thNight
23%11%10%28%23%3
465
16th to endNight
22%9%17%31%16%2
573
September1st to 15thNight
26%12%20%28%12%
678
16th to endNight
26%11%21%26%11%1
717
October1st to 15thNight
25%13%26%24%9%
720
16th to endNight
31%14%17%23%10%2
768
November1st to 15thNight
28%18%27%17%6%1
760
16th to endNight
27%21%24%20%6%
857
December1st to 15thNight
18%21%23%23%10%1
975
16th to endNight
18%19%20%27%11%3
1040
Page generated at 2018-04-24 10:03:01. Version ac04

Copyright 2018 A. Danko


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