Moose Pond
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Moose Pond clear sky chart from 2005-11-05 to 2017-09-21.

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
34%
14779
17%
46864
9%
14747
43%
14747
21%
31056

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
29%
720
19%
2506
9%
716
42%
716
19%
1594
January16th to endNight
23%
768
17%
2688
7%
768
37%
768
16%
1782
February1st to 15thNight
22%
704
15%
2255
6%
701
34%
701
17%
1562
February16th to endNight
26%
631
19%
1893
8%
631
39%
631
20%
1283
March1st to 15thNight
24%
720
16%
2145
8%
720
35%
720
19%
1501
March16th to endNight
29%
768
21%
2048
8%
768
39%
768
24%
1368
April1st to 15thNight
27%
718
17%
1796
5%
718
34%
718
23%
1299
April16th to endNight
29%
556
16%
1636
7%
556
36%
556
20%
1119
May1st to 15thNight
32%
540
14%
1620
9%
540
38%
540
18%
1145
May16th to endNight
36%
388
11%
1510
11%
387
42%
387
14%
1036
June1st to 15thNight
36%
360
9%
1440
9%
360
43%
360
14%
1005
June16th to endNight
51%
360
9%
1440
13%
360
55%
360
21%
897
July1st to 15thNight
58%
340
11%
1360
17%
340
60%
340
23%
810
July16th to endNight
58%
376
13%
1418
16%
354
60%
354
23%
858
August1st to 15thNight
51%
488
14%
1559
12%
486
54%
486
24%
991
August16th to endNight
55%
669
20%
1815
13%
669
57%
669
33%
1137
September1st to 15thNight
50%
720
19%
1869
10%
720
55%
720
35%
1184
September16th to endNight
51%
681
25%
1880
16%
681
57%
681
36%
1125
October1st to 15thNight
40%
660
21%
1861
11%
660
48%
660
25%
1237
October16th to endNight
27%
704
15%
2288
8%
704
38%
704
19%
1540
November1st to 15thNight
36%
700
22%
2277
13%
700
48%
700
23%
1456
November16th to endNight
31%
720
20%
2352
11%
720
42%
720
20%
1534
December1st to 15thNight
24%
720
16%
2520
5%
720
36%
720
16%
1722
December16th to endNight
24%
768
17%
2688
7%
768
37%
768
15%
1871

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%25%42445%6%38%
48005
Night
16%7%2442445%6%39%
47034
Cloud CoverDay
18%6%2442445%6%38%
48015
Night
17%7%24424446%39%
47039
TransparencyDay
45%6%11%21%13%1
47693
Night
44%5%12%22%13%1
46864
SeeingDay
22%10%26%23%12%4
5849
Night
21%8%29%30%10%
14779

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%6%443345%6%6%38%
1432
16th to endDay
13%9%25%5%24446%41%
1536
February1st to 15thDay
14%9%46%5%3446%6%35%
1603
16th to endDay
13%9%26%5%36%45%6%36%
1580
March1st to 15thDay
17%9%45%5%3445%6%34%
1805
16th to endDay
13%7%45%5%24335%43%
2175
April1st to 15thDay
17%7%35%424346%38%
2152
16th to endDay
19%6%24434346%39%
2323
May1st to 15thDay
24%8%26%424445%29%
2332
16th to endDay
20%5%25%435%45%6%34%
2613
June1st to 15thDay
26%5%35%423446%31%
2520
16th to endDay
19%5%25%5%35%5%5%7%33%
2520
July1st to 15thDay
13%6%25%5%36%6%6%8%35%
2520
16th to endDay
14%5%245%36%6%6%8%35%
2654
August1st to 15thDay
14%5%25%7%46%5%6%7%35%
2378
16th to endDay
11%414435%46%7%46%
2386
September1st to 15thDay
14%415%414447%46%
2090
16th to endDay
15%312322446%52%
1873
October1st to 15thDay
20%6%24323436%41%
1766
16th to endDay
19%7%25%424446%38%
1584
November1st to 15thDay
19%42442245%7%41%
1581
16th to endDay
20%6%1432444441%
1606
December1st to 15thDay
20%8%35%5%2445%6%32%
1440
16th to endDay
21%10%36%42435%5%31%
1536
January1st to 15thNight
13%9%244245%47%40%
2506
16th to endNight
14%9%36%425%45%6%37%
2688
February1st to 15thNight
11%9%35%6%36%5%5%6%34%
2254
16th to endNight
14%10%45%5%2444440%
1893
March1st to 15thNight
16%9%345%34446%35%
2132
16th to endNight
15%6%24424445%44%
2048
April1st to 15thNight
17%7%36%4345%45%36%
1796
16th to endNight
21%6%23423435%39%
1636
May1st to 15thNight
19%7%25%6%3445%5%35%
1620
16th to endNight
21%7%35%43436%7%32%
1508
June1st to 15thNight
24%8%2442445%6%33%
1440
16th to endNight
17%41442446%8%40%
1440
July1st to 15thNight
13%3246%3446%9%41%
1440
16th to endNight
13%4145%25%5%6%8%42%
1514
August1st to 15thNight
15%5%245%3445%8%40%
1569
16th to endNight
13%42432436%8%47%
1815
September1st to 15thNight
13%413423346%51%
1869
16th to endNight
13%422323346%52%
1880
October1st to 15thNight
19%425%42345%5%42%
1861
16th to endNight
21%7%24423445%37%
2288
November1st to 15thNight
16%7%2433445%6%42%
2277
16th to endNight
17%6%25%434335%42%
2352
December1st to 15thNight
20%9%45%42344436%
2520
16th to endNight
19%10%35%425%445%33%
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
16%7%35%42445%7%39%
1432
16th to endDay
14%8%36%42345%5%41%
1536
February1st to 15thDay
15%9%36%5%25%5%5%6%34%
1603
16th to endDay
13%9%35%5%36%446%37%
1580
March1st to 15thDay
18%10%35%42435%6%34%
1815
16th to endDay
15%7%35%5%24336%43%
2175
April1st to 15thDay
18%8%25%5%23446%38%
2152
16th to endDay
20%6%245%33446%39%
2323
May1st to 15thDay
25%7%25%5%2445%5%30%
2332
16th to endDay
21%5%245%345%5%7%33%
2613
June1st to 15thDay
27%5%34424347%31%
2520
16th to endDay
19%6%25%5%35%5%5%7%33%
2520
July1st to 15thDay
13%6%25%6%45%5%6%8%35%
2520
16th to endDay
15%4245%36%6%6%8%35%
2654
August1st to 15thDay
14%5%25%6%35%5%6%7%36%
2378
16th to endDay
11%4144245%7%7%46%
2386
September1st to 15thDay
14%425%323446%46%
2090
16th to endDay
15%413323446%52%
1873
October1st to 15thDay
21%6%24413336%41%
1766
16th to endDay
20%5%34424346%38%
1584
November1st to 15thDay
20%5%2332335%5%43%
1581
16th to endDay
21%6%2442435%441%
1606
December1st to 15thDay
20%9%34425%45%6%33%
1440
16th to endDay
22%11%44424346%31%
1536
January1st to 15thNight
14%9%244245%5%6%40%
2506
16th to endNight
14%9%35%5%35%45%5%37%
2688
February1st to 15thNight
13%10%35%6%45%5%46%34%
2247
16th to endNight
14%9%35%5%24335%39%
1893
March1st to 15thNight
18%9%34425%446%35%
2145
16th to endNight
16%6%3442345%5%44%
2047
April1st to 15thNight
18%7%35%6%24346%36%
1796
16th to endNight
22%6%24423445%39%
1636
May1st to 15thNight
20%7%35%43445%5%35%
1620
16th to endNight
22%6%36%5%2445%7%31%
1508
June1st to 15thNight
25%7%25%424446%32%
1440
16th to endNight
17%5%25%32436%9%39%
1440
July1st to 15thNight
14%3146%2447%9%40%
1440
16th to endNight
13%4244345%6%8%42%
1514
August1st to 15thNight
14%6%25%5%2445%7%41%
1569
16th to endNight
14%41342335%7%48%
1815
September1st to 15thNight
14%313423346%50%
1869
16th to endNight
13%414322436%52%
1880
October1st to 15thNight
18%5%24424445%42%
1861
16th to endNight
22%6%25%323346%37%
2288
November1st to 15thNight
17%7%2432435%5%42%
2277
16th to endNight
17%6%25%434435%41%
2352
December1st to 15thNight
21%8%35%424345%36%
2520
16th to endNight
21%10%34425%436%34%
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%7%11%22%13%1
1433
16th to endDay
42%5%12%24%12%1
1536
February1st to 15thDay
48%5%13%20%10%1
1606
16th to endDay
48%5%11%17%13%3
1580
March1st to 15thDay
50%411%17%12%3
1815
16th to endDay
43%5%9%17%18%5%
2175
April1st to 15thDay
45%48%20%16%3
2152
16th to endDay
46%5%10%18%15%3
2323
May1st to 15thDay
54%5%7%16%14%2
2332
16th to endDay
48%7%12%18%11%2
2617
June1st to 15thDay
52%6%11%18%9%
2520
16th to endDay
49%7%11%19%11%1
2520
July1st to 15thDay
42%9%13%23%11%
2371
16th to endDay
42%8%15%22%10%
2487
August1st to 15thDay
43%8%14%24%9%
2364
16th to endDay
33%7%15%26%16%1
2386
September1st to 15thDay
37%6%10%27%17%1
2090
16th to endDay
33%410%27%22%1
1873
October1st to 15thDay
45%5%8%23%14%1
1766
16th to endDay
45%5%10%23%12%1
1584
November1st to 15thDay
40%5%15%23%13%1
1581
16th to endDay
44%6%12%18%15%1
1606
December1st to 15thDay
49%6%12%19%11%
1440
16th to endDay
54%5%10%17%11%
1536
January1st to 15thNight
42%6%13%23%12%1
2506
16th to endNight
47%5%10%19%14%2
2688
February1st to 15thNight
49%5%12%19%12%1
2255
16th to endNight
46%5%11%20%13%3
1893
March1st to 15thNight
49%49%22%11%2
2145
16th to endNight
41%5%10%18%18%5%
2048
April1st to 15thNight
49%47%18%17%2
1796
16th to endNight
46%5%10%20%13%3
1636
May1st to 15thNight
49%6%8%17%14%2
1620
16th to endNight
51%6%14%18%8%1
1510
June1st to 15thNight
52%6%11%19%8%1
1440
16th to endNight
42%6%15%22%11%1
1440
July1st to 15thNight
37%8%17%24%11%
1360
16th to endNight
38%7%18%22%12%
1418
August1st to 15thNight
40%7%15%25%11%
1559
16th to endNight
34%6%14%27%16%
1815
September1st to 15thNight
34%5%12%30%15%1
1869
16th to endNight
32%5%11%31%18%1
1880
October1st to 15thNight
42%5%12%22%15%1
1861
16th to endNight
47%5%11%24%10%1
2288
November1st to 15thNight
42%5%12%23%13%1
2277
16th to endNight
44%5%13%21%13%1
2352
December1st to 15thNight
49%5%11%22%10%
2520
16th to endNight
51%5%10%19%11%
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
20%23%16%31%8%
60
16th to endDay
23%15%32%23%4
64
February1st to 15thDay
27%10%29%27%5%
199
16th to endDay
17%15%34%23%8%
239
March1st to 15thDay
26%14%26%25%5%
270
16th to endDay
22%16%29%14%13%3
288
April1st to 15thDay
26%11%27%20%10%3
270
16th to endDay
25%13%31%15%9%4
270
May1st to 15thDay
38%9%23%15%9%3
288
16th to endDay
22%13%30%20%9%1
331
June1st to 15thDay
25%11%29%21%10%
315
16th to endDay
21%8%30%25%13%1
315
July1st to 15thDay
17%5%28%28%14%5%
305
16th to endDay
17%424%32%15%5%
326
August1st to 15thDay
17%6%23%27%19%6%
313
16th to endDay
13%7%17%30%19%11%
332
September1st to 15thDay
15%7%24%21%20%9%
315
16th to endDay
18%6%21%22%14%16%
275
October1st to 15thDay
24%9%18%20%20%5%
249
16th to endDay
23%10%27%25%11%
240
November1st to 15thDay
22%14%23%25%10%3
235
16th to endDay
30%10%22%24%10%1
226
December1st to 15thDay
25%16%28%20%10%
60
16th to endDay
39%17%26%17%
64
January1st to 15thNight
20%9%34%30%4
720
16th to endNight
21%12%33%27%4
768
February1st to 15thNight
19%9%39%28%3
704
16th to endNight
19%10%36%26%6%
631
March1st to 15thNight
24%10%35%25%3
720
16th to endNight
19%13%30%27%7%1
768
April1st to 15thNight
23%9%33%27%5%
718
16th to endNight
23%14%29%24%7%
556
May1st to 15thNight
24%9%27%29%8%
540
16th to endNight
24%5%25%32%10%1
388
June1st to 15thNight
27%425%32%10%
360
16th to endNight
19%120%44%14%
360
July1st to 15thNight
14%117%42%24%
340
16th to endNight
15%19%43%20%1
376
August1st to 15thNight
16%119%42%19%
488
16th to endNight
16%118%39%20%3
669
September1st to 15thNight
16%223%35%18%2
720
16th to endNight
16%423%29%21%4
681
October1st to 15thNight
22%7%24%28%15%1
660
16th to endNight
25%9%30%27%6%
704
November1st to 15thNight
21%8%28%30%9%1
700
16th to endNight
21%11%28%27%9%1
720
December1st to 15thNight
26%7%36%23%4
720
16th to endNight
26%10%32%26%3
768
Page generated at 2017-09-22 07:35:34. Version ac04

Copyright 2017 A. Danko


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