Moose Hill Wildlife Sanctuary
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Moose Hill Wildlife Sanctuary clear sky chart from 2005-11-05 to 2018-01-12.

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
25%
15390
18%
48313
7%
15358
37%
15358
19%
31778

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
15%
765
18%
2662
5%
761
31%
761
15%
1698
January16th to endNight
13%
768
18%
2688
3%
768
33%
768
13%
1758
February1st to 15thNight
14%
704
17%
2177
4%
701
29%
701
16%
1480
February16th to endNight
15%
631
23%
1893
6%
631
35%
631
17%
1252
March1st to 15thNight
16%
720
17%
2151
6%
720
31%
720
16%
1497
March16th to endNight
19%
768
23%
2037
6%
768
33%
768
20%
1399
April1st to 15thNight
18%
718
17%
1796
3%
718
26%
718
20%
1284
April16th to endNight
20%
591
18%
1671
3%
591
30%
591
19%
1157
May1st to 15thNight
20%
540
15%
1620
6%
540
28%
540
17%
1140
May16th to endNight
23%
431
10%
1553
6%
430
30%
430
15%
1060
June1st to 15thNight
28%
360
11%
1440
6%
360
39%
360
13%
980
June16th to endNight
33%
360
11%
1440
10%
360
43%
360
21%
881
July1st to 15thNight
38%
340
12%
1360
10%
340
46%
340
22%
824
July16th to endNight
42%
376
14%
1418
13%
354
49%
354
20%
888
August1st to 15thNight
39%
520
15%
1591
9%
518
43%
518
25%
1009
August16th to endNight
50%
721
21%
1867
12%
721
53%
721
34%
1198
September1st to 15thNight
37%
720
19%
1866
7%
720
44%
720
30%
1235
September16th to endNight
43%
717
24%
1980
15%
717
50%
717
31%
1238
October1st to 15thNight
34%
720
22%
2000
10%
720
45%
720
26%
1295
October16th to endNight
24%
768
18%
2496
6%
768
38%
768
20%
1609
November1st to 15thNight
26%
760
19%
2472
8%
760
40%
760
20%
1593
November16th to endNight
22%
780
22%
2535
8%
780
39%
780
18%
1584
December1st to 15thNight
19%
780
17%
2688
5%
780
34%
780
15%
1774
December16th to endNight
14%
832
19%
2912
4%
832
32%
832
14%
1945

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
17%6%2442445%6%39%
49030
Night
16%7%25%424446%40%
48483
Cloud CoverDay
17%6%24424447%39%
49040
Night
17%7%25%424446%40%
48488
TransparencyDay
43%5%11%21%15%2
48718
Night
44%5%11%21%15%2
48313
SeeingDay
22%15%32%18%8%2
6265
Night
21%14%34%22%6%
15390

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
15%9%33324446%43%
1520
16th to endDay
15%6%245%23446%43%
1536
February1st to 15thDay
18%6%245%35%5%46%36%
1683
16th to endDay
15%8%26%5%23436%41%
1580
March1st to 15thDay
21%8%3432345%6%35%
1798
16th to endDay
17%8%25%423335%41%
2184
April1st to 15thDay
19%7%35%42345%5%38%
2152
16th to endDay
18%5%245%2445%6%41%
2289
May1st to 15thDay
25%8%35%423436%32%
2332
16th to endDay
17%5%245%2445%7%39%
2571
June1st to 15thDay
25%5%245%2345%6%33%
2520
16th to endDay
14%5%25%5%36%5%5%9%35%
2520
July1st to 15thDay
12%6%25%6%36%5%6%8%36%
2520
16th to endDay
12%425%6%36%6%6%8%36%
2654
August1st to 15thDay
13%5%25%5%35%6%5%8%37%
2346
16th to endDay
12%5%15%435%45%8%43%
2333
September1st to 15thDay
13%5%2442435%6%47%
2092
16th to endDay
16%5%23323346%49%
1980
October1st to 15thDay
21%6%23323325%44%
1958
16th to endDay
17%6%24423446%43%
1728
November1st to 15thDay
21%7%2332333443%
1716
16th to endDay
17%5%24433446%43%
1755
December1st to 15thDay
18%7%35%424346%39%
1599
16th to endDay
22%8%235%34335%36%
1664
January1st to 15thNight
16%8%35%423436%41%
2662
16th to endNight
17%9%35%42334440%
2688
February1st to 15thNight
15%8%36%434446%37%
2176
16th to endNight
16%8%25%324346%41%
1893
March1st to 15thNight
17%8%25%5%3445%6%36%
2138
16th to endNight
16%9%36%423335%43%
2037
April1st to 15thNight
16%9%35%43445%5%37%
1796
16th to endNight
22%5%245%23345%40%
1671
May1st to 15thNight
21%7%35%424446%35%
1620
16th to endNight
18%6%35%4345%5%8%34%
1551
June1st to 15thNight
22%6%344345%46%34%
1440
16th to endNight
15%434425%5%47%41%
1440
July1st to 15thNight
10%6%35%435%46%10%39%
1440
16th to endNight
12%5%25%6%36%5%6%8%36%
1514
August1st to 15thNight
8%5%26%6%35%6%5%8%42%
1601
16th to endNight
12%5%143245%5%9%45%
1867
September1st to 15thNight
13%4245%3445%6%45%
1866
16th to endNight
15%5%24322435%50%
1980
October1st to 15thNight
18%6%24413345%45%
2000
16th to endNight
19%5%245%24346%41%
2496
November1st to 15thNight
17%6%25%424245%43%
2472
16th to endNight
17%6%245%14446%43%
2535
December1st to 15thNight
19%8%2442444439%
2688
16th to endNight
18%9%25%423347%36%
2912

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 15thDay
15%8%34313446%43%
1520
16th to endDay
16%6%34423345%43%
1536
February1st to 15thDay
19%6%34435%447%36%
1683
16th to endDay
15%8%25%5%23445%41%
1580
March1st to 15thDay
20%8%34324447%35%
1808
16th to endDay
17%8%25%424336%41%
2184
April1st to 15thDay
19%7%25%42335%6%37%
2152
16th to endDay
18%5%1442335%6%41%
2289
May1st to 15thDay
25%8%34413436%33%
2332
16th to endDay
18%5%2443445%7%39%
2571
June1st to 15thDay
25%5%2442345%7%33%
2520
16th to endDay
15%425%5%35%6%6%8%36%
2520
July1st to 15thDay
13%6%245%46%6%5%9%35%
2520
16th to endDay
13%435%5%36%6%6%8%35%
2654
August1st to 15thDay
13%5%25%5%35%6%6%8%37%
2346
16th to endDay
12%5%25%43445%9%43%
2333
September1st to 15thDay
13%425%33345%5%46%
2092
16th to endDay
16%5%23323436%49%
1980
October1st to 15thDay
22%5%23422335%44%
1958
16th to endDay
16%6%24423447%43%
1728
November1st to 15thDay
22%7%23323345%42%
1716
16th to endDay
17%6%14424345%44%
1755
December1st to 15thDay
19%6%25%5%23346%38%
1599
16th to endDay
22%9%235%34345%36%
1664
January1st to 15thNight
17%7%25%433336%41%
2662
16th to endNight
17%8%36%42334439%
2688
February1st to 15thNight
15%8%35%5%34446%38%
2169
16th to endNight
16%7%35%324345%42%
1893
March1st to 15thNight
17%8%26%5%3445%5%37%
2151
16th to endNight
16%9%35%42333443%
2036
April1st to 15thNight
16%9%35%434445%36%
1796
16th to endNight
21%6%245%34335%40%
1671
May1st to 15thNight
22%7%35%424447%34%
1620
16th to endNight
18%6%26%43446%8%33%
1551
June1st to 15thNight
22%6%25%4345%47%34%
1440
16th to endNight
16%5%243345%5%7%41%
1440
July1st to 15thNight
11%5%25%5%35%5%5%10%39%
1440
16th to endNight
12%5%35%5%46%6%6%9%35%
1514
August1st to 15thNight
8%6%25%5%45%5%5%8%42%
1601
16th to endNight
12%5%2342445%7%46%
1867
September1st to 15thNight
13%4245%35%5%5%5%45%
1866
16th to endNight
15%6%2432235%5%49%
1980
October1st to 15thNight
19%5%24323435%45%
2000
16th to endNight
19%5%145%2335%6%41%
2496
November1st to 15thNight
18%6%2442434443%
2472
16th to endNight
17%6%24424346%43%
2535
December1st to 15thNight
20%6%25%5%2345%5%38%
2688
16th to endNight
19%9%35%323346%37%
2912

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
41%6%10%24%13%3
1521
16th to endDay
42%410%26%14%1
1536
February1st to 15thDay
46%5%13%19%13%1
1686
16th to endDay
44%411%21%14%2
1580
March1st to 15thDay
48%312%21%10%3
1808
16th to endDay
44%49%20%14%5%
2184
April1st to 15thDay
46%410%19%16%2
2152
16th to endDay
42%5%8%22%17%4
2289
May1st to 15thDay
52%5%8%16%14%2
2332
16th to endDay
43%7%12%20%13%2
2575
June1st to 15thDay
50%6%12%19%10%1
2520
16th to endDay
42%8%13%20%14%
2520
July1st to 15thDay
42%8%11%20%14%2
2371
16th to endDay
42%8%13%20%10%3
2487
August1st to 15thDay
41%9%12%21%14%1
2332
16th to endDay
37%7%10%24%18%1
2333
September1st to 15thDay
37%6%11%21%21%2
2092
16th to endDay
36%47%22%25%2
1980
October1st to 15thDay
43%39%23%15%3
1958
16th to endDay
41%411%23%16%2
1728
November1st to 15thDay
44%412%21%15%1
1716
16th to endDay
41%411%24%14%2
1755
December1st to 15thDay
45%5%14%16%17%
1599
16th to endDay
50%5%13%17%11%1
1664
January1st to 15thNight
45%412%21%15%1
2662
16th to endNight
47%410%20%14%2
2688
February1st to 15thNight
47%412%20%12%2
2177
16th to endNight
44%410%20%16%2
1893
March1st to 15thNight
48%5%9%19%13%3
2151
16th to endNight
45%47%17%20%4
2037
April1st to 15thNight
47%49%18%16%2
1796
16th to endNight
46%5%8%19%15%4
1671
May1st to 15thNight
49%5%10%16%13%3
1620
16th to endNight
47%8%14%17%8%2
1553
June1st to 15thNight
50%7%12%18%11%1
1440
16th to endNight
40%7%12%23%14%1
1440
July1st to 15thNight
38%7%13%25%13%
1360
16th to endNight
41%7%14%24%9%2
1418
August1st to 15thNight
38%8%14%21%14%2
1591
16th to endNight
35%6%11%27%18%
1867
September1st to 15thNight
38%6%12%22%19%
1866
16th to endNight
36%5%7%21%27%1
1980
October1st to 15thNight
40%411%23%16%3
2000
16th to endNight
43%412%22%14%
2496
November1st to 15thNight
43%410%22%15%2
2472
16th to endNight
42%412%23%15%2
2535
December1st to 15thNight
47%413%20%12%
2688
16th to endNight
48%411%20%13%1
2912

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
21%31%31%12%2
82
16th to endDay
29%23%37%9%
64
February1st to 15thDay
28%21%36%10%2
237
16th to endDay
21%23%35%15%3
239
March1st to 15thDay
30%22%30%10%5%
270
16th to endDay
21%28%31%9%7%
288
April1st to 15thDay
26%18%35%12%6%1
270
16th to endDay
21%16%35%18%42
270
May1st to 15thDay
38%18%22%14%41
288
16th to endDay
22%14%35%21%6%
331
June1st to 15thDay
27%13%35%15%6%
315
16th to endDay
15%13%40%21%6%1
315
July1st to 15thDay
20%7%38%22%9%1
305
16th to endDay
14%7%33%29%12%2
326
August1st to 15thDay
14%10%30%31%10%2
313
16th to endDay
15%7%28%26%18%3
332
September1st to 15thDay
17%11%27%26%13%3
315
16th to endDay
23%5%29%16%12%11%
314
October1st to 15thDay
23%11%24%23%10%5%
313
16th to endDay
19%17%35%18%8%1
288
November1st to 15thDay
27%15%28%17%9%1
280
16th to endDay
23%18%31%15%9%1
285
December1st to 15thDay
25%25%31%11%6%
129
16th to endDay
25%35%32%6%1
96
January1st to 15thNight
22%20%38%15%2
765
16th to endNight
25%20%35%16%2
768
February1st to 15thNight
22%20%37%17%1
704
16th to endNight
23%21%34%16%3
631
March1st to 15thNight
22%21%35%16%3
720
16th to endNight
22%20%33%18%5%
768
April1st to 15thNight
21%20%37%16%4
718
16th to endNight
24%16%34%19%4
591
May1st to 15thNight
25%16%34%18%4
540
16th to endNight
20%9%41%23%4
431
June1st to 15thNight
24%7%34%25%8%
360
16th to endNight
16%440%30%6%
360
July1st to 15thNight
12%240%35%9%
340
16th to endNight
12%432%40%9%
376
August1st to 15thNight
11%438%36%9%
520
16th to endNight
15%424%38%14%2
721
September1st to 15thNight
16%5%35%32%10%
720
16th to endNight
19%6%25%25%17%4
717
October1st to 15thNight
21%9%28%26%10%2
720
16th to endNight
22%15%35%17%8%
768
November1st to 15thNight
21%14%31%20%10%1
760
16th to endNight
22%18%30%19%7%
780
December1st to 15thNight
24%17%34%17%4
780
16th to endNight
26%21%33%16%1
832
Page generated at 2018-01-12 22:01:32. Version ac04

Copyright 2018 A. Danko


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