West Carry Pond
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the West Carry Pond clear sky chart from 2005-11-06 to 2024-01-31.

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%
22968
15%
75072
7%
22921
35%
22921
14%
51787

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 10thNight
15%
760
14%
2649
4%
757
27%
757
10%
1896
January11th to 20thNight
15%
760
12%
2660
3%
760
25%
760
7%
1966
January21st to endNight
13%
835
14%
2919
3%
835
27%
835
10%
1990
February1st to 10thNight
14%
720
13%
2412
4%
720
26%
720
10%
1731
February11th to 20thNight
12%
703
14%
2124
2%
700
27%
700
9%
1512
February21st to endNight
12%
592
19%
1776
4%
592
31%
592
12%
1245
March1st to 10thNight
14%
720
17%
2160
5%
720
29%
720
12%
1555
March11th to 20thNight
20%
720
15%
2025
5%
720
30%
720
13%
1447
March21st to endNight
21%
792
19%
2116
5%
792
31%
792
16%
1510
April1st to 10thNight
18%
720
15%
1800
2%
720
26%
720
15%
1342
April11th to 20thNight
26%
601
17%
1665
5%
601
34%
601
17%
1146
April21st to endNight
21%
540
14%
1620
5%
540
30%
540
14%
1182
May1st to 10thNight
24%
540
13%
1620
7%
540
32%
540
15%
1176
May11th to 20thNight
24%
458
15%
1520
8%
458
36%
458
15%
1059
May21st to endNight
31%
389
12%
1551
10%
388
42%
388
15%
1036
June1st to 10thNight
28%
360
11%
1274
8%
360
38%
360
13%
897
June11th to 20thNight
38%
360
13%
1260
11%
360
45%
360
18%
817
June21st to endNight
36%
360
10%
1280
9%
360
42%
360
17%
879
July1st to 10thNight
41%
350
12%
1400
14%
350
49%
350
18%
876
July11th to 20thNight
46%
348
13%
1392
18%
348
51%
348
20%
843
July21st to endNight
47%
394
13%
1486
13%
372
53%
372
18%
960
August1st to 10thNight
44%
458
12%
1522
9%
456
48%
456
22%
972
August11th to 20thNight
42%
532
17%
1596
11%
532
47%
532
23%
1061
August21st to endNight
42%
668
20%
1856
10%
668
47%
668
29%
1175
September1st to 10thNight
45%
720
17%
1832
7%
720
50%
720
33%
1167
September11th to 20thNight
42%
720
20%
1980
11%
720
49%
720
29%
1250
September21st to endNight
37%
720
22%
1980
12%
720
45%
720
26%
1292
October1st to 10thNight
33%
720
19%
1980
9%
720
42%
720
21%
1366
October11th to 20thNight
29%
720
15%
2254
7%
720
39%
720
17%
1537
October21st to endNight
19%
792
12%
2574
5%
792
28%
792
11%
1849
November1st to 10thNight
25%
740
17%
2407
9%
740
36%
740
15%
1658
November11th to 20thNight
24%
760
20%
2470
10%
760
37%
760
13%
1714
November21st to endNight
22%
823
15%
2638
5%
823
33%
823
12%
1847
December1st to 10thNight
14%
850
12%
2850
2%
850
25%
850
10%
2127
December11th to 20thNight
16%
850
13%
3438
4%
848
27%
848
8%
2423
December21st to endNight
11%
873
9%
4986
1%
859
24%
859
5%
3284

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%9%47%6%45%5%6%7%32%
74700
Night
16%9%47%6%35%5%5%7%33%
75415
TransparencyDay
51%6%12%19%11%2
74405
Night
49%6%12%21%11%1
75245
SeeingDay
26%20%28%16%7%2
14265
Night
25%17%26%23%8%1
22979

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 10thDay
12%10%5%10%8%45%5%6%8%25%
1517
11th to 20thDay
16%11%47%7%46%5%6%6%28%
1520
21st to endDay
10%10%49%8%46%47%6%33%
1664
February1st to 10thDay
13%14%48%7%47%6%6%6%26%
1546
11th to 20thDay
10%12%5%10%10%5%5%5%5%6%26%
1721
21st to endDay
11%13%5%9%7%46%6%5%6%27%
1480
March1st to 10thDay
13%12%5%8%6%35%5%5%6%31%
1797
11th to 20thDay
15%10%5%7%6%3445%6%35%
1934
21st to endDay
14%11%48%8%4435%5%34%
2238
April1st to 10thDay
17%13%5%8%6%3435%6%29%
2160
11th to 20thDay
15%11%37%6%35%45%7%34%
2243
21st to endDay
21%12%48%6%34446%28%
2340
May1st to 10thDay
22%10%36%6%34446%32%
2340
11th to 20thDay
21%9%37%6%46%5%45%31%
2389
21st to endDay
14%8%36%6%46%6%7%9%30%
2725
June1st to 10thDay
24%9%36%6%35%5%6%7%27%
2682
11th to 20thDay
17%6%36%6%35%5%6%7%34%
2700
21st to endDay
21%7%37%7%45%6%6%7%27%
2675
July1st to 10thDay
15%6%36%6%46%5%7%8%34%
2520
11th to 20thDay
13%6%47%7%46%6%6%9%34%
2520
21st to endDay
15%6%46%6%47%7%7%10%29%
2744
August1st to 10thDay
16%6%35%6%46%6%6%9%32%
2386
11th to 20thDay
13%6%46%7%47%6%6%9%34%
2304
21st to endDay
12%6%36%6%45%6%6%7%40%
2498
September1st to 10thDay
12%5%36%6%35%6%6%7%43%
2127
11th to 20thDay
14%6%35%434446%48%
1980
21st to endDay
14%7%36%6%346%5%8%38%
1980
October1st to 10thDay
17%9%46%5%3446%7%36%
1979
11th to 20thDay
16%10%36%7%45%45%7%32%
1704
21st to endDay
21%14%5%8%7%3445%6%25%
1782
November1st to 10thDay
16%9%48%6%35%45%6%34%
1671
11th to 20thDay
18%8%48%7%45%5%6%6%29%
1710
21st to endDay
18%10%38%6%3446%8%29%
1535
December1st to 10thDay
18%14%7%9%7%44435%24%
1330
11th to 20thDay
20%12%37%6%3445%5%31%
1668
21st to endDay
22%13%36%6%35%5%6%6%24%
2591
January1st to 10thNight
14%11%48%9%46%5%6%7%27%
2649
11th to 20thNight
12%14%5%8%9%46%5%6%6%25%
2660
21st to endNight
10%9%5%9%8%46%6%6%7%30%
2919
February1st to 10thNight
12%11%5%9%8%46%5%7%8%26%
2412
11th to 20thNight
9%11%5%9%8%46%5%5%8%29%
2122
21st to endNight
14%11%5%7%6%35%6%5%6%34%
1776
March1st to 10thNight
12%13%5%7%7%5%5%45%6%31%
2150
11th to 20thNight
14%11%48%5%35%6%6%7%31%
2024
21st to endNight
15%11%37%7%35%5%45%34%
2116
April1st to 10thNight
18%12%36%6%445%6%6%30%
1800
11th to 20thNight
18%7%35%5%35%5%6%7%36%
1665
21st to endNight
22%10%46%5%35%5%5%7%29%
1620
May1st to 10thNight
19%10%46%5%35%447%31%
1620
11th to 20thNight
20%8%36%5%35%5%5%6%33%
1519
21st to endNight
16%7%36%6%246%6%8%35%
1550
June1st to 10thNight
23%8%37%5%3445%7%30%
1274
11th to 20thNight
18%9%25%5%345%5%8%37%
1260
21st to endNight
20%7%36%6%346%6%6%34%
1280
July1st to 10thNight
15%7%36%5%3447%9%38%
1440
11th to 20thNight
13%7%25%5%345%7%10%39%
1440
21st to endNight
13%6%25%7%35%6%7%9%38%
1574
August1st to 10thNight
13%7%35%435%5%5%8%41%
1532
11th to 20thNight
12%7%37%5%345%7%8%39%
1596
21st to endNight
13%6%25%4245%5%7%47%
1856
September1st to 10thNight
12%5%245%2446%7%50%
1832
11th to 20thNight
14%6%25%42445%7%47%
1980
21st to endNight
15%7%25%5%345%48%42%
1980
October1st to 10thNight
15%8%46%5%35%45%7%37%
1980
11th to 20thNight
17%9%36%5%35%5%5%7%34%
2254
21st to endNight
22%9%36%6%35%5%5%8%28%
2574
November1st to 10thNight
16%8%37%6%35%6%5%6%33%
2407
11th to 20thNight
14%9%5%7%8%35%5%5%6%32%
2470
21st to endNight
15%9%5%8%7%45%5%6%6%30%
2638
December1st to 10thNight
18%12%6%10%7%445%5%7%23%
2850
11th to 20thNight
20%11%5%7%5%35%5%5%7%28%
3531
21st to endNight
22%10%47%6%3445%7%28%
5065

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 10thDay
57%5%13%16%9%1
1518
11th to 20thDay
55%6%9%16%11%2
1520
21st to endDay
51%410%16%16%2
1664
February1st to 10thDay
58%310%15%11%2
1546
11th to 20thDay
57%412%14%11%2
1730
21st to endDay
57%410%15%10%4
1480
March1st to 10thDay
52%5%11%16%13%4
1800
11th to 20thDay
50%410%18%14%4
1934
21st to endDay
53%38%19%13%3
2238
April1st to 10thDay
57%49%15%11%4
2160
11th to 20thDay
49%5%9%20%15%1
2243
21st to endDay
58%5%7%17%9%4
2340
May1st to 10thDay
53%5%8%19%13%2
2340
11th to 20thDay
54%5%8%19%11%2
2393
21st to endDay
49%7%13%19%11%1
2725
June1st to 10thDay
56%6%12%19%7%
2682
11th to 20thDay
48%7%11%21%12%2
2700
21st to endDay
55%7%11%18%8%1
2675
July1st to 10thDay
44%8%17%21%10%
2450
11th to 20thDay
46%7%14%25%8%
2445
21st to endDay
48%8%14%21%7%1
2591
August1st to 10thDay
47%9%16%22%7%
2372
11th to 20thDay
47%8%15%20%10%
2304
21st to endDay
42%7%14%23%13%1
2498
September1st to 10thDay
38%7%15%27%12%1
2127
11th to 20thDay
38%410%30%16%2
1980
21st to endDay
42%7%13%25%13%1
1980
October1st to 10thDay
47%6%12%23%12%
1979
11th to 20thDay
50%6%15%23%7%
1704
21st to endDay
60%411%14%10%1
1782
November1st to 10thDay
50%5%13%19%12%1
1671
11th to 20thDay
52%6%10%17%11%3
1710
21st to endDay
51%5%17%19%7%1
1535
December1st to 10thDay
63%47%15%9%1
1330
11th to 20thDay
54%39%17%15%2
1668
21st to endDay
58%6%10%17%8%2
2591
January1st to 10thNight
55%5%11%18%10%1
2649
11th to 20thNight
57%7%12%16%7%2
2660
21st to endNight
51%5%11%18%13%2
2919
February1st to 10thNight
55%5%11%17%10%2
2412
11th to 20thNight
53%5%11%18%11%2
2124
21st to endNight
51%5%9%20%13%3
1776
March1st to 10thNight
53%49%20%12%2
2160
11th to 20thNight
50%6%12%16%13%3
2025
21st to endNight
50%49%21%13%3
2116
April1st to 10thNight
53%410%15%15%2
1800
11th to 20thNight
46%6%10%22%15%1
1665
21st to endNight
54%5%11%16%11%3
1620
May1st to 10thNight
52%7%8%19%13%1
1620
11th to 20thNight
50%6%11%19%13%1
1520
21st to endNight
47%8%13%23%8%1
1551
June1st to 10thNight
53%7%11%20%10%
1274
11th to 20thNight
45%6%12%22%13%2
1260
21st to endNight
49%7%14%21%9%
1280
July1st to 10thNight
42%7%15%25%11%
1400
11th to 20thNight
40%7%16%28%9%
1392
21st to endNight
42%10%15%21%11%1
1486
August1st to 10thNight
41%8%16%28%7%
1522
11th to 20thNight
42%8%16%23%10%
1596
21st to endNight
36%7%15%28%14%
1856
September1st to 10thNight
33%7%15%32%13%
1832
11th to 20thNight
37%5%12%30%15%1
1980
21st to endNight
41%5%13%28%12%1
1980
October1st to 10thNight
45%6%11%25%13%
1980
11th to 20thNight
47%6%15%24%7%1
2254
21st to endNight
54%6%11%18%11%
2574
November1st to 10thNight
49%6%12%20%12%1
2407
11th to 20thNight
50%6%10%20%13%2
2470
21st to endNight
51%5%13%21%9%1
2638
December1st to 10thNight
59%410%17%8%1
2850
11th to 20thNight
53%5%11%17%14%1
3532
21st to endNight
54%5%14%18%10%1
5065

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 10thDay
31%26%32%10%2
180
11th to 20thDay
37%22%28%9%21
180
21st to endDay
22%24%37%13%4
196
February1st to 10thDay
35%22%29%12%2
266
11th to 20thDay
29%31%26%12%1
404
21st to endDay
33%28%23%15%2
346
March1st to 10thDay
30%24%32%12%2
420
11th to 20thDay
28%28%26%13%41
420
21st to endDay
31%25%25%11%6%2
462
April1st to 10thDay
36%23%24%10%5%1
420
11th to 20thDay
33%26%22%12%5%2
412
21st to endDay
38%19%29%9%42
420
May1st to 10thDay
35%21%30%10%31
423
11th to 20thDay
28%21%33%13%5%1
447
21st to endDay
22%22%34%16%5%1
485
June1st to 10thDay
29%19%30%17%6%1
612
11th to 20thDay
24%16%28%20%11%1
630
21st to endDay
25%13%29%22%9%2
605
July1st to 10thDay
19%18%33%20%8%1
445
11th to 20thDay
16%16%35%21%9%2
444
21st to endDay
17%12%41%23%6%2
488
August1st to 10thDay
15%11%35%24%12%2
446
11th to 20thDay
19%15%27%22%14%4
439
21st to endDay
18%17%27%23%11%4
495
September1st to 10thDay
15%16%29%23%12%5%
450
11th to 20thDay
21%15%28%16%12%7%
450
21st to endDay
18%17%29%21%10%6%
450
October1st to 10thDay
23%20%25%19%11%3
449
11th to 20thDay
27%21%26%15%8%3
360
21st to endDay
33%25%18%19%4
396
November1st to 10thDay
30%19%23%19%7%1
365
11th to 20thDay
31%22%24%14%7%1
370
21st to endDay
32%22%25%15%42
332
December1st to 10thDay
28%28%28%12%4
180
11th to 20thDay
40%24%26%7%3
180
21st to endDay
36%25%26%9%31
198
January1st to 10thNight
25%23%29%20%3
760
11th to 20thNight
29%20%28%19%4
760
21st to endNight
21%24%34%17%3
835
February1st to 10thNight
24%23%31%19%3
720
11th to 20thNight
25%25%28%19%2
703
21st to endNight
26%23%32%17%2
592
March1st to 10thNight
27%21%33%19%1
720
11th to 20thNight
26%25%23%21%5%
720
21st to endNight
25%23%24%20%7%1
792
April1st to 10thNight
31%20%27%17%4
720
11th to 20thNight
25%18%27%24%5%
601
21st to endNight
31%18%24%19%8%
540
May1st to 10thNight
27%16%26%24%6%1
540
11th to 20thNight
24%16%30%22%8%
458
21st to endNight
20%12%30%29%9%
389
June1st to 10thNight
29%11%26%25%9%1
360
11th to 20thNight
23%11%22%29%15%
360
21st to endNight
23%10%24%33%9%
360
July1st to 10thNight
21%8%24%35%11%1
350
11th to 20thNight
18%7%24%34%16%1
348
21st to endNight
15%6%23%39%16%
394
August1st to 10thNight
17%6%25%34%17%1
458
11th to 20thNight
17%5%27%33%16%1
532
21st to endNight
16%10%24%32%16%2
668
September1st to 10thNight
15%9%26%33%16%2
720
11th to 20thNight
18%13%22%28%17%3
720
21st to endNight
20%14%24%27%14%1
720
October1st to 10thNight
22%14%22%28%12%1
720
11th to 20thNight
27%17%23%22%10%2
720
21st to endNight
34%16%25%19%4
792
November1st to 10thNight
26%18%25%24%7%1
740
11th to 20thNight
27%19%25%20%8%1
760
21st to endNight
29%21%22%20%6%1
823
December1st to 10thNight
28%20%31%15%5%
850
11th to 20thNight
31%22%25%17%4
850
21st to endNight
32%22%28%15%3
884
Page generated at 2024-01-28 05:26:36. Version ac07

Copyright 2024 Attilla Danko


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