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

2017-09-12
.

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%
14904
18%
46760
7%
14872
37%
14872
19%
30838

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
14%
720
19%
2506
5%
716
31%
716
15%
1619
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
17%
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
12%
1440
6%
360
40%
360
13%
980
June16th to endNight
33%
360
11%
1440
10%
360
43%
360
21%
881
July1st to 15thNight
37%
340
12%
1360
11%
340
45%
340
22%
824
July16th to endNight
43%
376
14%
1418
13%
354
50%
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
38%
707
19%
1830
7%
707
45%
707
30%
1211
September16th to endNight
42%
657
24%
1815
15%
657
50%
657
32%
1127
October1st to 15thNight
32%
660
23%
1833
10%
660
45%
660
25%
1199
October16th to endNight
23%
704
16%
2288
5%
704
37%
704
19%
1484
November1st to 15thNight
26%
700
20%
2277
8%
700
41%
700
21%
1461
November16th to endNight
22%
720
20%
2340
7%
720
38%
720
18%
1489
December1st to 15thNight
19%
720
18%
2481
5%
720
34%
720
15%
1630
December16th to endNight
15%
768
19%
2688
4%
768
32%
768
14%
1811

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%
47905
Night
16%7%25%424446%40%
46930
Cloud CoverDay
17%6%24424447%39%
47915
Night
17%7%25%424446%40%
46935
TransparencyDay
43%5%11%21%14%2
47593
Night
44%5%11%21%15%2
46760
SeeingDay
22%15%32%18%8%2
5905
Night
21%14%34%22%6%
14904

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
16%9%3332445%6%41%
1432
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
14%5%2443435%5%47%
2048
16th to endDay
14%5%23323346%50%
1815
October1st to 15thDay
22%6%23313326%44%
1795
16th to endDay
16%6%24423446%43%
1584
November1st to 15thDay
22%7%2332333443%
1581
16th to endDay
17%6%24433447%42%
1620
December1st to 15thDay
18%7%35%424346%39%
1476
16th to endDay
23%8%235%34335%35%
1536
January1st to 15thNight
17%8%35%423436%40%
2506
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%42443445%6%45%
1830
16th to endNight
14%5%24322436%51%
1815
October1st to 15thNight
19%6%23413345%45%
1833
16th to endNight
19%5%245%24346%40%
2288
November1st to 15thNight
17%6%25%423245%44%
2277
16th to endNight
17%6%245%24446%41%
2340
December1st to 15thNight
19%7%245%2444440%
2481
16th to endNight
18%10%35%423347%35%
2688

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%9%34313446%41%
1432
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
14%425%43345%5%46%
2048
16th to endDay
15%5%23323446%49%
1815
October1st to 15thDay
22%5%23322335%44%
1795
16th to endDay
16%6%24424347%42%
1584
November1st to 15thDay
23%6%23322345%43%
1581
16th to endDay
17%6%15%424445%42%
1620
December1st to 15thDay
19%6%25%5%23337%39%
1476
16th to endDay
22%9%23434345%35%
1536
January1st to 15thNight
18%7%35%423336%40%
2506
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%5%245%35%5%5%5%45%
1830
16th to endNight
14%6%14322345%50%
1815
October1st to 15thNight
20%5%24323435%44%
1833
16th to endNight
19%5%15%5%2335%6%41%
2288
November1st to 15thNight
18%6%2442334444%
2277
16th to endNight
18%6%24424446%41%
2340
December1st to 15thNight
20%6%25%5%23345%39%
2481
16th to endNight
19%10%35%333346%36%
2688

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
42%6%11%24%12%3
1433
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%12%21%21%1
2048
16th to endDay
35%47%23%26%2
1815
October1st to 15thDay
43%39%23%16%3
1795
16th to endDay
41%412%22%15%2
1584
November1st to 15thDay
44%412%21%15%1
1581
16th to endDay
42%5%12%23%14%2
1620
December1st to 15thDay
45%5%14%17%17%
1476
16th to endDay
51%5%13%17%11%1
1536
January1st to 15thNight
46%412%20%14%1
2506
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%23%19%
1830
16th to endNight
35%5%7%22%27%2
1815
October1st to 15thNight
42%410%22%16%3
1833
16th to endNight
44%5%13%21%14%
2288
November1st to 15thNight
43%410%22%15%3
2277
16th to endNight
43%412%22%15%2
2340
December1st to 15thNight
47%413%21%13%
2481
16th to endNight
48%412%20%12%
2688

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
26%28%31%11%1
60
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
18%11%27%26%12%4
299
16th to endDay
20%5%34%16%11%12%
254
October1st to 15thDay
25%11%24%22%11%6%
254
16th to endDay
17%18%36%19%7%
240
November1st to 15thDay
28%14%27%17%9%2
235
16th to endDay
22%18%33%14%10%1
240
December1st to 15thDay
25%28%30%13%3
96
16th to endDay
28%31%31%7%1
64
January1st to 15thNight
23%19%38%15%2
720
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%
707
16th to endNight
18%6%27%26%17%3
657
October1st to 15thNight
23%10%28%25%9%2
660
16th to endNight
23%15%35%18%7%
704
November1st to 15thNight
21%15%31%20%10%1
700
16th to endNight
23%18%30%19%7%
720
December1st to 15thNight
25%17%34%18%4
720
16th to endNight
26%21%33%16%1
768
Page generated at 2017-09-13 07:39:06. Version ac04

Copyright 2017 A. Danko


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