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, Leo Taylor.

Young's Pond
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Young's Pond clear sky chart from 2005-11-05 to 2017-09-10.

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%
14960
18%
46761
9%
14929
44%
14929
22%
30367

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
19%
720
20%
2506
7%
716
36%
716
18%
1565
January16th to endNight
19%
768
20%
2655
7%
768
37%
768
18%
1654
February1st to 15thNight
18%
704
18%
2180
5%
701
33%
701
19%
1454
February16th to endNight
20%
631
24%
1893
8%
631
40%
631
23%
1205
March1st to 15thNight
24%
720
17%
2160
7%
720
36%
720
21%
1438
March16th to endNight
27%
768
23%
2007
8%
768
40%
768
28%
1317
April1st to 15thNight
31%
718
17%
1796
6%
718
37%
718
26%
1263
April16th to endNight
33%
653
17%
1733
5%
653
39%
653
26%
1193
May1st to 15thNight
34%
540
16%
1620
7%
540
41%
540
20%
1139
May16th to endNight
44%
385
13%
1508
11%
385
50%
385
17%
991
June1st to 15thNight
43%
360
14%
1440
12%
360
53%
360
18%
933
June16th to endNight
60%
360
13%
1440
17%
360
65%
360
25%
831
July1st to 15thNight
54%
340
11%
1360
16%
340
56%
340
20%
853
July16th to endNight
60%
376
15%
1418
17%
354
64%
354
22%
863
August1st to 15thNight
59%
524
17%
1595
12%
522
62%
522
29%
978
August16th to endNight
61%
764
17%
1910
10%
764
63%
764
32%
1283
September1st to 15thNight
48%
700
21%
1775
12%
700
51%
700
32%
1170
September16th to endNight
50%
657
23%
1815
17%
657
55%
657
31%
1156
October1st to 15thNight
35%
660
21%
1879
13%
660
44%
660
24%
1249
October16th to endNight
28%
704
16%
2243
6%
704
40%
704
22%
1453
November1st to 15thNight
32%
700
20%
2277
10%
700
46%
700
22%
1445
November16th to endNight
26%
720
20%
2343
10%
720
39%
720
20%
1506
December1st to 15thNight
24%
720
16%
2520
6%
720
36%
720
16%
1648
December16th to endNight
17%
768
18%
2688
5%
768
33%
768
16%
1780

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%5%2442445%7%41%
47869
Night
17%6%24424446%41%
46931
Cloud CoverDay
16%5%2442445%7%42%
47879
Night
17%6%24424446%41%
46936
TransparencyDay
40%6%13%22%15%2
47557
Night
42%5%12%21%15%2
46761
SeeingDay
19%7%28%28%14%3
5830
Night
20%8%30%28%10%1
14961

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
17%6%144145%5%443%
1432
16th to endDay
15%8%25%42345%7%41%
1566
February1st to 15thDay
16%6%15%4345%5%6%39%
1679
16th to endDay
17%425%5%335%5%7%39%
1580
March1st to 15thDay
18%6%35%434347%38%
1790
16th to endDay
18%6%25%324435%41%
2214
April1st to 15thDay
20%6%24324346%41%
2152
16th to endDay
17%5%235%23346%45%
2226
May1st to 15thDay
23%7%3442435%6%36%
2332
16th to endDay
16%5%25%42435%8%40%
2616
June1st to 15thDay
22%5%3433345%8%35%
2520
16th to endDay
12%5%245%35%45%10%41%
2520
July1st to 15thDay
11%6%24435%5%6%10%39%
2520
16th to endDay
12%5%24425%5%6%8%41%
2654
August1st to 15thDay
13%4234345%6%8%43%
2340
16th to endDay
11%5%245%2346%7%45%
2292
September1st to 15thDay
13%4145%345%45%47%
2073
16th to endDay
15%414424346%47%
1815
October1st to 15thDay
17%6%24433446%42%
1749
16th to endDay
15%5%1442445%6%43%
1628
November1st to 15thDay
19%6%1442334445%
1581
16th to endDay
18%423415%346%44%
1614
December1st to 15thDay
18%5%15%43335%6%41%
1440
16th to endDay
22%8%24424345%38%
1536
January1st to 15thNight
19%6%24323346%43%
2506
16th to endNight
17%8%24323336%43%
2655
February1st to 15thNight
15%8%35%433446%40%
2179
16th to endNight
17%6%145%33446%43%
1893
March1st to 15thNight
20%6%13424446%40%
2147
16th to endNight
16%6%34324346%45%
2007
April1st to 15thNight
18%6%35%433347%39%
1796
16th to endNight
20%6%245%23345%41%
1733
May1st to 15thNight
21%7%2443445%6%35%
1620
16th to endNight
20%6%25%42435%9%36%
1506
June1st to 15thNight
22%5%24424446%38%
1440
16th to endNight
14%414335%35%8%46%
1440
July1st to 15thNight
13%5%25%5%25%46%9%38%
1440
16th to endNight
11%5%25%5%36%5%7%9%37%
1514
August1st to 15thNight
10%4144346%7%9%42%
1605
16th to endNight
12%425%43445%8%43%
1910
September1st to 15thNight
15%5%23334346%46%
1775
16th to endNight
15%424324335%48%
1815
October1st to 15thNight
16%7%25%423435%44%
1879
16th to endNight
18%5%244335%36%41%
2243
November1st to 15thNight
17%6%3342334445%
2277
16th to endNight
19%5%34323447%40%
2343
December1st to 15thNight
21%6%2343445%5%38%
2520
16th to endNight
21%6%24434346%38%
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
17%6%1442436%6%42%
1432
16th to endDay
16%7%25%32435%7%41%
1566
February1st to 15thDay
16%5%244235%5%7%40%
1679
16th to endDay
16%4245%34448%40%
1580
March1st to 15thDay
19%5%245%34448%38%
1800
16th to endDay
18%5%24423345%43%
2214
April1st to 15thDay
20%5%23324446%42%
2152
16th to endDay
16%5%14423446%45%
2226
May1st to 15thDay
22%6%2432335%7%38%
2332
16th to endDay
16%5%25%325%45%9%40%
2616
June1st to 15thDay
20%5%24424348%37%
2520
16th to endDay
11%5%244345%5%9%43%
2520
July1st to 15thDay
11%5%24425%5%6%10%41%
2520
16th to endDay
12%3244245%6%8%43%
2654
August1st to 15thDay
12%42432446%8%45%
2340
16th to endDay
11%5%1443345%7%48%
2292
September1st to 15thDay
12%42442345%6%48%
2073
16th to endDay
14%5%2342345%6%48%
1815
October1st to 15thDay
17%6%25%42335%7%42%
1749
16th to endDay
14%5%2342445%7%43%
1628
November1st to 15thDay
20%5%2442333444%
1581
16th to endDay
17%5%13424447%44%
1614
December1st to 15thDay
18%5%24433447%39%
1440
16th to endDay
22%7%15%423346%38%
1536
January1st to 15thNight
19%6%24323346%42%
2506
16th to endNight
16%9%24223346%43%
2655
February1st to 15thNight
14%8%35%5%24445%41%
2172
16th to endNight
17%5%24434346%43%
1893
March1st to 15thNight
20%6%24324446%40%
2160
16th to endNight
16%7%23414336%45%
2006
April1st to 15thNight
18%7%245%23337%39%
1796
16th to endNight
20%5%35%433336%41%
1733
May1st to 15thNight
20%7%3443445%6%35%
1620
16th to endNight
20%6%2443445%8%36%
1506
June1st to 15thNight
22%414424446%38%
1440
16th to endNight
13%4135%24449%45%
1440
July1st to 15thNight
12%5%245%36%5%6%8%38%
1440
16th to endNight
11%4246%45%5%7%8%38%
1514
August1st to 15thNight
9%4144336%8%9%42%
1605
16th to endNight
12%415%43446%7%44%
1910
September1st to 15thNight
15%5%1442445%6%45%
1775
16th to endNight
14%5%25%424336%47%
1815
October1st to 15thNight
15%7%25%5%23335%44%
1879
16th to endNight
18%5%25%5%24446%41%
2243
November1st to 15thNight
18%6%24424335%45%
2277
16th to endNight
19%5%2442445%6%40%
2343
December1st to 15thNight
21%6%2442445%7%37%
2520
16th to endNight
21%6%25%423446%38%
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%5%14%22%12%2
1433
16th to endDay
42%412%25%13%2
1566
February1st to 15thDay
42%6%14%21%14%1
1682
16th to endDay
40%6%12%24%14%1
1580
March1st to 15thDay
44%416%22%10%2
1800
16th to endDay
42%5%10%18%18%3
2214
April1st to 15thDay
41%5%11%21%16%3
2152
16th to endDay
38%6%9%22%18%3
2226
May1st to 15thDay
46%5%10%19%14%2
2332
16th to endDay
40%9%16%19%13%2
2620
June1st to 15thDay
45%7%12%21%10%1
2520
16th to endDay
35%8%15%25%13%1
2520
July1st to 15thDay
36%9%13%22%16%1
2371
16th to endDay
36%8%15%23%13%2
2487
August1st to 15thDay
33%8%17%23%15%
2326
16th to endDay
33%7%10%26%19%1
2292
September1st to 15thDay
34%8%13%22%20%1
2073
16th to endDay
36%5%8%22%24%2
1815
October1st to 15thDay
41%5%11%22%16%2
1749
16th to endDay
38%6%13%24%15%1
1628
November1st to 15thDay
43%414%18%17%2
1581
16th to endDay
39%414%26%13%2
1614
December1st to 15thDay
43%5%17%19%13%
1440
16th to endDay
48%415%18%11%
1536
January1st to 15thNight
43%413%23%13%2
2506
16th to endNight
42%5%10%23%15%2
2655
February1st to 15thNight
44%6%12%22%12%2
2180
16th to endNight
41%310%23%16%3
1893
March1st to 15thNight
44%5%14%19%13%3
2160
16th to endNight
40%410%20%18%4
2007
April1st to 15thNight
45%410%21%14%2
1796
16th to endNight
45%49%19%17%3
1733
May1st to 15thNight
48%6%10%17%14%2
1620
16th to endNight
45%8%15%16%12%1
1508
June1st to 15thNight
46%5%12%18%14%1
1440
16th to endNight
36%6%15%25%15%
1440
July1st to 15thNight
40%9%12%21%15%1
1360
16th to endNight
38%8%16%22%11%2
1418
August1st to 15thNight
33%9%15%24%15%2
1595
16th to endNight
37%7%12%24%17%
1910
September1st to 15thNight
37%6%11%26%17%
1775
16th to endNight
39%47%21%26%1
1815
October1st to 15thNight
43%5%10%21%16%3
1879
16th to endNight
44%416%19%14%
2243
November1st to 15thNight
42%411%20%17%3
2277
16th to endNight
43%5%12%24%11%2
2343
December1st to 15thNight
46%5%16%18%12%
2520
16th to endNight
47%5%13%20%12%1
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
13%21%38%26%
60
16th to endDay
26%11%46%14%1
69
February1st to 15thDay
19%14%46%16%2
195
16th to endDay
15%15%38%23%6%
239
March1st to 15thDay
21%15%32%24%5%
270
16th to endDay
21%10%43%17%5%1
288
April1st to 15thDay
24%7%34%24%8%
270
16th to endDay
22%430%28%11%2
270
May1st to 15thDay
29%9%28%21%9%2
288
16th to endDay
21%323%29%18%3
331
June1st to 15thDay
22%423%28%17%3
315
16th to endDay
13%326%36%17%2
315
July1st to 15thDay
16%119%37%18%6%
305
16th to endDay
13%118%37%23%5%
326
August1st to 15thDay
12%16%37%25%6%
313
16th to endDay
11%315%37%22%9%
332
September1st to 15thDay
14%428%25%18%8%
294
16th to endDay
18%324%25%19%8%
254
October1st to 15thDay
21%7%21%27%17%4
255
16th to endDay
16%10%36%25%9%1
248
November1st to 15thDay
21%10%25%27%11%2
235
16th to endDay
17%12%32%26%10%
234
December1st to 15thDay
18%23%28%20%8%1
60
16th to endDay
37%9%40%12%
64
January1st to 15thNight
23%16%36%19%4
720
16th to endNight
22%15%38%21%1
768
February1st to 15thNight
19%14%41%22%2
704
16th to endNight
21%13%40%21%3
631
March1st to 15thNight
24%11%35%23%5%
720
16th to endNight
20%10%37%24%6%
768
April1st to 15thNight
22%7%34%28%5%
718
16th to endNight
22%432%29%8%1
653
May1st to 15thNight
22%6%31%27%11%
540
16th to endNight
22%321%38%13%
386
June1st to 15thNight
23%421%34%15%
360
16th to endNight
15%117%46%17%1
360
July1st to 15thNight
13%121%42%19%2
340
16th to endNight
11%117%44%21%2
376
August1st to 15thNight
12%18%46%20%1
524
16th to endNight
14%213%37%27%4
764
September1st to 15thNight
18%224%32%18%4
700
16th to endNight
17%221%31%21%5%
657
October1st to 15thNight
20%7%30%26%13%1
660
16th to endNight
21%11%35%24%7%
704
November1st to 15thNight
21%11%30%23%11%1
700
16th to endNight
21%15%31%22%8%
720
December1st to 15thNight
24%14%31%22%5%
720
16th to endNight
25%14%38%19%1
768
Page generated at 2017-09-11 19:35:30. Version ac04

Copyright 2017 A. Danko


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